TW201543043A - Load testing machine - Google Patents

Abstract

An object of the invention is to provide a load testing machine composed of multiple resistance units, which is easy to transport and install. In the load testing machine, a plurality of resistor groups with resistors arranged in the horizontal direction are arranged in the z direction which corresponds to the vertical direction, at least two resistance units including frames are provided which are formed from an insulating material and cover the side surfaces of the resistor groups, and at least two discretely formed stage sections with internally mounted cooling fans are provided. At least one resistance unit is mounted to the top of each of the base sections via an insulator. Among the frames, at least those located in a positional relationship facing another resistance unit are disposed inward of the side surface of the base section to which the resistance units are mounted by a first distance when viewed from above, and the two or more resistance units are arranged so that the spacing between frames in adjacent resistance units is at least a second distance in order to ensure satisfactory insulation between the adjacent resistance units. The second distance is twice the first distance, and the first distance is at least 45 mm.

Description

Load tester

The present invention relates to a load tester used for electrical load testing of a power source of an alternator or the like.

We have proposed a dry load tester using a resistor unit with a plurality of resistors side by side. [Prior Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open Publication No. 2010-25752

[Problems to be solved by the invention]

When the voltage of the load test object power supply is large, a large load tester in which a plurality of resistance units are arranged side by side is required. In a large-scale load tester, since a plurality of resistor units are attached to the upper portion of the base portion to form an integral structure, it is necessary to carry them in a state in which the resistor unit and the base portion are assembled together, but the narrow portion is lifted by a lift or the like. It is difficult to carry the space.

Accordingly, it is an object of the present invention to provide a load testing machine that is constructed of a plurality of resistor units and that is easy to handle or set. [Means for solving problems]

In the load tester of the present invention, the resistors are arranged side by side in the horizontal direction, and the plurality of segments are arranged side by side in the vertical direction (ie, the z direction); and the frame including the insulating material and covering the side of the resistor group Two or more resistor units are provided in the body; a base portion of the cooling fan is provided, and two or more individual members are provided, and two or more individual units are provided; and at least one or more resistor units are mounted on the upper portion via an insulator. The surface of the frame that is at least in a positional relationship with the other resistance unit is disposed at a first inner distance from the side of the base portion on which the resistor unit is mounted, as viewed from above; two or more The resistor unit is arranged such that the interval between the adjacent resistor units is equal to or greater than the second distance for the insulation between the adjacent resistor units; the second distance is twice the first distance, and the first distance is 45 mm or more. .

Since the base portion is formed as an individual individual from the other base portions, the base unit can be transported while the resistor unit and the cooling fan are attached to the base portion and are not connected to the other base portion. . Therefore, if the overall size (width, height, and depth) of one base portion and the resistor unit is smaller than the entrance width, height, and depth of the elevator such as an elevator, the elevator can be used to transport one base unit. A combination of a resistor unit and a cooling fan.

In consideration of the positional relationship with other base portions and the cable connection between the resistor units, etc., it is necessary to carry out after the loading, but the wiring is fixed to the base portion or the inside of the resistor unit by the resistor unit and the cooling fan. In terms of work, it is easier to work, so it can be easily carried out in a place where a load tester is installed.

Further, since the frame of each of the resistor units is disposed further inside than the base portion, even if the base portions are placed in contact with each other, the resistor units do not contact each other, and the second distance is maintained. Interval. Therefore, even if each of the base portions constitutes an individual independent individual, it can be easily set while maintaining insulation between the resistance units.

In particular, in the present invention, since the second distance can be 90 mm or more, even when a voltage of 6600 V is applied to each of the two adjacent resistance units, the insulation between the two resistance units can be maintained.

In a preferred embodiment, the first resistor unit to the sixth resistor unit are provided as the resistor unit, the first cooling fan to the sixth cooling fan are provided as the cooling fan, and the first base unit to the base unit are provided as the base unit. 6 base portion; the first base portion is provided with a first cooling fan, and the first resistor unit is mounted on the upper portion via an insulator; the second base portion is provided with a second cooling fan, and the upper portion is mounted with an insulator therebetween. a second resistor unit; a third cooling fan is disposed therein, and a third resistor unit is mounted on the upper portion via an insulator; and a fourth cooling fan is disposed in the fourth base portion, and is mounted on the upper portion via an insulator. The fourth resistor unit; the fifth base portion is provided with a fifth cooling fan, and the fifth resistor unit is mounted on the upper portion via an insulator; the sixth base portion is provided with a sixth cooling fan, and the upper portion is mounted via an insulator. The sixth base unit, the first base portion, the third base portion, and the fifth base portion each constitute an individual individual; the second base portion, the fourth base portion, and the sixth base portion are individually independent. The first resistor unit and the second resistor unit are separated by an interval of a second distance or more. The third resistor unit and the fourth resistor unit are arranged side by side in the x direction at intervals of the second distance or more, and the fifth resistor unit and the sixth resistor unit are separated by the second distance. The above intervals are arranged side by side in the x direction; the first resistance unit, the third resistance unit, and the fifth resistance unit are perpendicular to the x direction and the z direction with an interval longer than the third distance longer than the second distance. The second resistance unit, the fourth resistance unit, and the sixth resistance unit are arranged side by side in the y direction with an interval of a third distance or more.

More preferably, the first base portion and the second base portion are integrally formed, and the third base portion and the fourth base portion are integrally formed, and the fifth base portion and the sixth base portion are integrally formed.

When the elevator has a size capable of simultaneously loading two base portions, that is, an overall size (width, height, and depth) when the combination of the two base portions, the resistance unit, and the cooling fan are adjacent in the x direction, When it is smaller than the entrance width, height, and depth of the elevator, respectively, the two base portions adjacent to each other in the x direction (for example, the first base portion and the second base portion) may be coupled together, and in this state, It is loaded on the lift.

Further, in a preferred aspect, the resistor group is constituted by a plurality of rod-shaped resistors extending in the y direction, which are arranged side by side in the x direction; and the first base portion, the third base portion, and the second base. Between the table portion and the fourth base portion, the third base portion and the fifth base portion, and the fourth base portion and the sixth base portion, an interval adjusting member is provided; and the width of the interval adjusting member in the y direction is The distance is longer than the second distance; the third distance is the sum of the distance between the first distance and the width of the interval adjusting member in the y direction; and the amount by which the terminal of the resistor protrudes from the frame covering the side surface of the resistor group, The first distance is shorter.

Further, since the terminal of the resistor protrudes from the frame of the side surface of the resistor unit covering the resistor group toward the y direction, the distance between the tips of the terminals is shorter than the third distance, but has a second distance. Since the spacer member having a longer width is disposed therebetween, the distance between the tips of the terminals is longer than the second distance, and the insulation formed by the isolation can be maintained.

Further, in a preferred aspect, the connection cable or the shorting bar is further provided; and the connection cable or the shorting bar is used to electrically connect two resistance units adjacent to each other at intervals of the second distance or more in the x direction. The device group is a connecting member that is connected in series in a state in which two or more resistor groups are adjacent to each other in the x direction; the insulator has a second distance or more in the x direction when used. The resistance unit group in which the resistor groups of two adjacent resistor units are connected in series is subjected to a power load test, and corresponds to the rated voltage of the power source of the test object.

In a better aspect, the connection cable or the shorting bar is connected to the resistor group through a fixed contact, a movable contact, and a driving member for driving the movable contact, and includes a housing filled with an inert gas. The switching member is carried out inside.

Further, in a preferred aspect, three connection switching sections are provided, the connection switching sections having: a body portion; and a switch portion for controlling a resistor group for load testing among the plurality of resistor groups; The first bus bar is connected to one of the terminal of the switch unit and one of the power lines of the test object power source from the load test; one of the terminals of one of the resistor groups and the other of the switch unit The main body has a first surface to which the switch portion is mounted, and a second surface perpendicular to the first surface and having the first bus bar interposed therebetween through a predetermined interval; and three connection switching portions and a switch portion The first resistor unit, the third resistor unit, and the fifth resistor unit are mounted in a detachable state so as to be disposed between the terminal of the resistor connected to the cable and the switch unit and the first bus bar.

By using the connection switching unit including the first bus bar and the switch unit, the wiring work of the members constituting the load tester can be efficiently performed. In particular, since the switch portion is disposed between the terminal of the resistor and the first bus bar, the connection between the resistor and the switch portion, the switch portion, and the first bus bar can be performed using a short connecting member (cable or the like).

In a preferred aspect, the cooling air from the first to sixth cooling fans is guided between the first to sixth cooling fans and the first to sixth resistors. The cylindrical hood of the first to sixth resistor units; the upper portion of the tubular hood is located inside the frame covering the side surface of the resistor group, and is spaced apart from the frame by a distance of 10 mm or more.

Moreover, it is preferable that the first resistor unit and the second resistor unit are provided as the resistor unit, the first cooling fan and the second cooling fan are provided as the cooling fan, and the first base unit is provided as the base unit. And a second base portion; the first base portion is provided with a first cooling fan, and the first resistor unit is attached to the upper portion; the second base portion is provided with a second cooling fan, and the second resistor unit is attached to the upper portion. The first resistance unit and the second resistance unit are arranged side by side in the x direction perpendicular to the z direction at intervals of the second distance or more.

In the load tester of the present invention, the resistor group formed by the resistors side by side is arranged in a plurality of stages; the resistance unit including the frame composed of the insulating material and covering the side of the resistor group is provided with two In the above, a cooling unit for the cooling fan is provided, and two or more individual members are provided, and at least one or more resistor units are mounted via the insulator in each of the cooling units; at least the other resistors are disposed in the housing. The surface in which the cells are opposed to each other is disposed at a first distance from the side of the cooling portion on which the resistor unit is mounted; two or more resistor units are used for insulation between adjacent resistor units. The interval between the adjacent resistor units is parallel to the second distance, and the second distance is twice the first distance, and the first distance is 45 mm or more.

Preferably, the resistor unit includes a first resistor unit and a second resistor unit, a cooling fan includes a first cooling fan and a second cooling fan, and the cooling unit includes a first cooling unit and a second cooling unit. a first cooling unit having a first cooling fan installed therein, and a second cooling unit; a second cooling unit; and a second resistor unit; and a first resistor unit; The two resistor units are arranged side by side at intervals of the second distance or more.

In addition, a preferred embodiment is a cooling fan that exhausts air in a horizontal direction; the resistor unit has an air inlet opening that opens in a horizontal direction, and an air outlet that opens in a horizontal direction; and is further disposed downstream of the resistor unit. There is an air inlet opening that opens in the horizontal direction, and an air outlet that is open to the vertical direction and exhausts upward. [Effect of the invention]

As described above, according to the present invention, it is possible to provide a load tester which is composed of a plurality of resistor units and which is easy to handle or set.

Hereinafter, the present embodiment will be described with reference to the drawings. The dry load tester 1 of the present embodiment includes the first base portion 11 to the sixth base portion 16, the interval adjusting member 20, the first resistor unit 21 to the sixth resistor unit 26, and the first cooling fan 31 to The sixth cooling fan 36, the power supply connecting portion 40, the insulator 50, and the connection cable 60 (Figs. 1 to 13).

First, the description of the structure of each part is performed, and the description of the wiring between the power supply connecting portion 40 and each of the resistance units is performed after the description of the structure of each part (see FIGS. 14 to 24). Therefore, in FIGS. 1 to 13 , the members related to the wiring such as the connection switching unit 70 are omitted.

The first base portion 11 has an outer shape of a substantially rectangular parallelepiped shape, and a first cooling fan 31 is provided on an upper portion of the first base portion 11, and a side surface or a bottom surface of the lower portion of the first base portion 11 is provided. 1 The intake port of the cooling fan 31 is provided with an exhaust port of the first cooling fan 31 on the top surface. The first resistor unit 21 is fixed to the upper portion of the first base portion 11 via the insulator 50.

The second base portion 12 has an outer shape of a substantially rectangular parallelepiped shape, and a second cooling fan 32 is provided on an upper portion of the second base portion 12, and a side surface or a bottom surface of the lower portion of the second base portion 12 is provided. 2 The intake port of the cooling fan 32 is provided with an exhaust port of the second cooling fan 32 on the top surface. The second resistance unit 22 is fixed to the upper portion of the second base portion 12 via the insulator 50.

The third base portion 13 has an outer shape having a substantially rectangular parallelepiped shape, and a third cooling fan 33 is provided in an upper portion of the third base portion 13, and a side surface or a bottom surface of the lower portion of the third base portion 13 is provided. 3 The intake port of the cooling fan 33 is provided with an exhaust port of the third cooling fan 33 on the top surface. The third resistor unit 23 is fixed to the upper portion of the third base portion 13 via the insulator 50.

The fourth base portion 14 has an outer shape of a substantially rectangular parallelepiped shape, and a fourth cooling fan 34 is provided on the upper portion of the fourth base portion 14, and a side surface or a bottom surface of the lower portion of the fourth base portion 14 is provided. 4 The intake port of the cooling fan 34 is provided with an exhaust port of the fourth cooling fan 34 on the top surface. The fourth resistor unit 24 is fixed to the upper portion of the fourth base portion 14 via the insulator 50.

The fifth base portion 15 has an outer shape having a substantially rectangular parallelepiped shape, and a fifth cooling fan 35 is provided on an upper portion of the fifth base portion 15, and a side surface or a bottom surface of the lower portion of the fifth base portion 15 is provided. 5 The intake port of the cooling fan 35 is provided with an exhaust port of the fifth cooling fan 35 on the top surface. The fifth resistor unit 25 is fixed to the upper portion of the fifth base portion 15 via the insulator 50.

The sixth base portion 16 has an outer shape of a substantially rectangular parallelepiped shape, and a sixth cooling fan 36 is provided on the upper portion of the sixth base portion 16, and a side surface or a bottom surface of the lower portion of the sixth base portion 16 is provided. 6 The intake port of the cooling fan 36 is provided with an exhaust port of the sixth cooling fan 36 on the top surface. The sixth resistor unit 26 is fixed to the upper portion of the sixth base portion 16 via the insulator 50.

Further, a configuration in which a substrate, a shock-proof insulating rubber, or the like (not shown) is provided between the insulator 50 and each of the base portions may be employed.

In the embodiment shown in FIGS. 1 to 24, the horizontal direction in which the first base portion 11 and the second base portion 12 are arranged in the horizontal direction is the x direction, and the first base portion 11 and the third base portion 13 and the first base portion The horizontal direction of the 5 base portions 15 is y direction, and the vertical direction perpendicular to the y direction and the x direction is the z direction, and will be described accordingly.

Further, the side where the first resistance unit 21 and the second resistance unit 22 are provided is the front side, and the side where the power supply connection portion 40 is provided is the rear side, and will be described. For example, the back surface of the first frame 21a of the first resistor unit 21 faces the front surface of the third frame 23a of the third resistor unit 23, and one of the side faces of the first frame 21a of the first resistor unit 21 is The other side of the side surface of the second frame 22a of the resistor unit 22 faces each other.

The first base portion 11 and the second base portion 12 are provided in a state in which they are adjacent to each other without providing a gap in the x direction. The third base portion 13 and the fourth base portion 14 are provided in a state in which they are adjacent to each other without a gap in the x direction. The fifth base portion 15 and the sixth base portion 16 are provided in a state in which they are adjacent to each other without providing a gap in the x direction.

The first base portion 11, the third base portion 13, and the fifth base portion 15 are provided in a state in which the spacing adjusting members 20 are interposed therebetween and are aligned in the y direction. The second base portion 12, the fourth base portion 14, and the sixth base portion 16 are provided in a state in which the interval adjusting members 20 are interposed therebetween and are aligned in the y direction.

The spacing adjusting member 20 has a substantially rectangular parallelepiped shape having a width w1 in the y direction, and is disposed between the base portions for providing isolation of a width w1 or more between the base portions. The width w1 of the interval adjusting member 20 is longer (for example, 510 mm) than the second distance d2 to be described later.

Further, the first base portion 11 and the second base portion 12, the third base portion 13 and the fourth base portion 14, and the fifth base portion 15 and the sixth base portion may be formed. Between the members 16, the spacer member 20 is sandwiched between the members, and the respective base portions are disposed at intervals. In this case, it is easier to be between the first base portion 11 and the second base portion 12, between the third base portion 13 and the fourth base portion 14, and the fifth base portion 15 and the sixth base portion. A wiring space such as a cable is provided between the portions 16.

Each of the resistor units of the first to sixth resistor units 26 to the sixth resistor unit 26 is a rod-shaped resistor R that is parallel to the y-direction, and is arranged in a plurality of rows at a predetermined interval in the x direction, and the resistor group connected in series is in the z direction. a resistor unit including a plurality of stages and connected in parallel and including a frame body (the first frame body 21a to the sixth frame body 26a) which is made of an insulating material and covers the side faces of the resistor group, and is used to switch the resistors used. The group, the condition of the load of the test object power source such as the generator is changed to perform the load test of the test object power source.

In the embodiment shown in FIGS. 1 to 24, the respective resistance units of the first to sixth resistor units 26 to 26 are described, and the rod-shaped resistor R parallel to the y direction is interposed in the x direction. A resistor group in which eight resistors are connected in series at a predetermined interval and connected in series by a shorting bar or the like, and eight resistors are connected in parallel in the z direction, but the resistors of the resistors R are arranged side by side, or the resistor group The number of stacked segments is not limited to this.

The first resistor unit 21 has the eleventh resistor group R11 to the eighteenth resistor group R18 from the upper stage, and the second resistor unit 22 has the 21st resistor group R21 to the 28th resistor group R28 from the upper stage; The resistor unit 23 includes the 31st resistor group R31 to the 38th resistor group R38 from the upper stage, and the fourth resistor unit 24 has the 41st resistor group R41 to the 48th resistor group R48 from the upper stage; the 5th resistor unit In the upper stage, the 51st resistor group R51 to the 58th resistor group R58 are provided. The sixth resistor unit 26 has the 61st resistor group R61 to the 68th resistor group R68 from the upper stage.

Each of the resistor groups is covered by the frame body (the first frame body 21a to the sixth frame body 26a), and the cold air from the cooling fan provided at the lower portion flows to the upper portion, and is opened on the top surface and the bottom surface, and The insulation of the adjacent resistor unit is improved, and is composed of an insulating material, and both terminals of each resistor R are held by the front and back portions of the frame.

The first housing 21a on the side surface of the first resistor unit 21 covering the resistor group (the 11th resistor group R11 to the 18th resistor group R18) is located at least in the other resistor unit (the second resistor unit 22) The surface of the positional relationship between the third resistor unit and the third resistor unit 23 is disposed on the inner side of the first base portion 11 (in the horizontal direction) by a first distance d1 (45 mm or more). The size and positional relationship between the first base portion 11 and the first resistor unit 21 are determined.

The second housing 22a on the side surface of the second resistor unit 22 covering the resistor group (the 21st resistor group R21 to the 28th resistor group R28) is located at least in the other resistor unit (the first resistor unit 21) The surface which is in the positional relationship with the fourth resistance unit 24) is arranged such that the second distance is determined by the first distance d1 from the side surface (in the horizontal direction) of the second base portion 12 as viewed from above. The size and positional relationship between the table portion 12 and the second resistor unit 22.

The third housing 23a on the side surface of the third resistor unit 23 covering the resistor group (the 31st resistor group R31 to the 38th resistor group R38) is located at least in the other resistor unit (the first resistor unit 21) The surface of the positional relationship in which the fourth resistor unit 24 and the fifth resistor unit 25 are opposed to each other is disposed at a first distance d1 from the side surface (in the horizontal direction) of the third base portion 13 as viewed from above. In this manner, the size and positional relationship between the third base portion 13 and the third resistor unit 23 are determined.

The fourth housing 24a on the side surface of the fourth resistor unit 24 covering the resistor group (the 41st resistor group R41 to the 48th resistor group R48) is located at least in the other resistor unit (the second resistor unit 22) The surface of the positional relationship in which the third resistor unit 23 and the sixth resistor unit 26 are opposed to each other is disposed at a first distance d1 from the side surface (in the horizontal direction) of the fourth base portion 14 as viewed from above. In this manner, the size and positional relationship between the fourth base portion 14 and the fourth resistor unit 24 are determined.

The fifth housing 25a on the side surface of the fifth resistor unit 25 covering the resistor group (the 51st resistor group R51 to the 58th resistor group R58) is located at least in the other resistor unit (the third resistor unit 23) The surface of the positional relationship between the sixth and second resistor units 26) is arranged such that the fifth distance is determined by the first distance d1 from the side surface (in the horizontal direction) of the fifth base portion 15 as viewed from above. The size and positional relationship between the table portion 15 and the fifth resistor unit 25.

The sixth frame 26a on the side surface of the sixth resistor unit 26 covering the resistor group (the 61st resistor group R61 to the 68th resistor group R68) is located at least in the other resistor unit (the fourth resistor unit 24). The surface of the positional relationship between the fifth and second resistor units 25) is arranged such that the sixth distance is determined by the first distance d1 from the side surface (in the horizontal direction) of the sixth base portion 16 as viewed from above. The size and positional relationship of the table portion 16 and the sixth resistor unit 26.

The terminals of the resistors R of the first to sixth resistor units 21 to 26 are protruded from the frame body (the first housing 21a to the sixth housing 26a) of the respective surface of the resistor unit covering the resistor group toward the y direction. The size of the first to sixth resistor units 21 to 6 is determined such that the amount of protrusion is shorter than the first distance d1.

In addition, in the first frame body 21a to the sixth frame body 26a, the surface which is not located in a positional relationship with the other resistance unit may be arranged to be disposed from the upper surface than the first base portion 11 to the first 6 The side surface of each of the base portions 16 is further on the inner first distance d1. At this time, the materials of the resistor unit and the base portion can be made common, and the positions of the first base portion 11 to the sixth base portion 16 can be replaced.

At least one of the terminals of the resistor R that is connected in series to the resistor group of the first resistor unit 21, the third resistor unit 23, and the fifth resistor unit 25 (the side that is not connected to the connection cable 60 to be described later) The connection switching unit 70, which will be described later, is connected to the power supply connection unit 40. At least one of the terminals of the resistor R that constitutes the resistor group of the second resistor unit 22, the fourth resistor unit 24, and the sixth resistor unit 26 and that is connected in series (the side that is not connected to the connection cable 60 to be described later) ), in order to form a neutral point connection, connected to each other.

In order to efficiently perform the cooling of the cooling fan, the resistors adjacent in the z direction are disposed at intermediate positions of the resistor R constituting the resistor group and the resistor R adjacent to the resistor R in the x direction. The resistor R of each resistor group is arranged in the manner of the resistor R of the group. The uppermost resistor R is shown in FIGS. 1 and 2, and the pattern of the resistor R below the second stage is omitted.

The first resistance unit 21, the third resistance unit 23, and the fifth resistance unit 25 are arranged side by side in the y direction with an interval equal to or greater than the third distance d3, and the second resistance unit 22, the fourth resistance unit 24, and the sixth resistance unit 26, juxtaposed in the y direction at intervals of the third distance d3 or more. The third distance d3 has a longer length than the resistance unit (for example, the first resistor unit 21 and the third resistor unit 23) adjacent to each other in the y direction, and the worker can enter the base. The length between the stages (or between the resistor units) to the extent of wiring or the like (for example, the third distance d3 between the resistor units: 600 mm, and the width w1 between the base portions: 510 mm).

The first resistance unit 21 and the second resistance unit 22 are arranged side by side in the x direction at intervals of the second distance d2 or more, and the third resistance unit 23 and the fourth resistance unit 24 are spaced apart from each other by the second distance d2 or more. In the x direction, the fifth resistor unit 25 and the sixth resistor unit 26 are arranged side by side in the x direction with an interval equal to or greater than the second distance d2. The second distance d2 has a length (for example, 90 mm) to which the resistance units adjacent to each other in the x direction (for example, the first resistance unit 21 and the second resistance unit 22) can be insulated by isolation.

The second distance d2 is equal to twice the first distance d1; the third distance d3 is equal to the sum of twice the first distance d1 and the width w1 of the interval adjusting member 20 (d2=d1×2, d3=d1×2+w1) .

Even when the first base portion 11 and the second base portion 12 are adjacent to each other without a gap in the x direction, the first resistance unit 21 and the second resistance unit 22 are formed at least with the second distance d2 interposed therebetween. The positional relationship of (two times the first distance d1, that is, 90 mm or more) can maintain the first resistor unit 21 and the second resistor even when a high voltage of 6600 V is applied to each of the first resistor unit 21 and the second resistor unit 22 Insulation between units 22.

Even when the third base portion 13 and the fourth base portion 14 are adjacent to each other in the x direction without a gap, the third resistor unit 23 and the fourth resistor unit 24 are formed at least with the second distance d2 interposed therebetween. The positional relationship of (two times the first distance d1, that is, 90 mm or more), even if a high voltage of 6600 V is applied to each of the third resistor unit 23 and the fourth resistor unit 24, the third resistor unit 23 and the fourth resistor can be maintained. Insulation between units 24.

Even when the fifth base portion 15 and the sixth base portion 16 are adjacent to each other without a gap in the x direction, the fifth resistor unit 25 and the sixth resistor unit 26 are formed at least with the second distance d2 interposed therebetween. In the positional relationship (two times the first distance d1, that is, 90 mm or more), even when a high voltage of 6600 V is applied to each of the fifth resistor unit 25 and the sixth resistor unit 26, the fifth resistor unit 25 and the sixth resistor can be maintained. Insulation between units 26.

Even when the first base portion 11 and the third base portion 13 are arranged side by side without gaps in the y direction via the gap adjusting member 20, the first resistor unit 21 and the third resistor unit 23 are at least separated. The positional relationship between the third distance d3 (the sum of the first distance d1 and the width w1 of the interval adjusting member 20, that is, 600 mm or more) is 6600 V applied to the first resistor unit 21 and the third resistor unit 23, respectively. The insulation between the first resistance unit 21 and the third resistance unit 23 can also be maintained at a high voltage.

In addition, the terminals of the resistor R protrude from the frame body (the first housing 21a and the third housing 23a) of the first resistor unit 21 and the third resistor unit 23 covering the resistor group in the y direction. The distance between the tips of the terminals is shorter than the third distance d3, but since the interval adjusting member 20 having the width w1 longer than the second distance d2 is disposed therebetween, the distance between the tips of the terminals It will be longer than the second distance d2, and the insulation formed by the isolation can be maintained.

Even when the third base portion 13 and the fifth base portion 15 are arranged side by side without gaps in the y direction via the gap adjusting member 20, the third resistor unit 23 and the fifth resistor unit 25 are formed at least apart. The positional relationship between the third distance d3 (the sum of the first distance d1 and the width w1 of the interval adjusting member 20, that is, 600 mm or more) is 6600 V applied to the third resistor unit 23 and the fifth resistor unit 25, respectively. The insulation between the third resistance unit 23 and the fifth resistance unit 25 can also be maintained at a high voltage.

In addition, since the terminals of the resistor R are protruded in the y direction from the frames (the third housing 23a and the fifth housing 25a) of the third resistor unit 23 and the fifth resistor unit 25 covering the resistor group, The distance between the tips of the terminals is shorter than the third distance d3, but since the interval adjusting member 20 having the width w1 longer than the second distance d2 is disposed therebetween, the distance between the tips of the terminals It will be longer than the second distance d2, and the insulation formed by the isolation can be maintained.

Even when the second base portion 12 and the fourth base portion 14 are arranged side by side without gaps in the y direction via the gap adjusting member 20, the second resistor unit 22 and the fourth resistor unit 24 are formed at least apart. The positional relationship between the third distance d3 (the sum of the first distance d1 and the width w1 of the interval adjusting member 20, that is, 600 mm or more) is 6600 V applied to the second resistor unit 22 and the fourth resistor unit 24, respectively. The insulation between the second resistance unit 22 and the fourth resistance unit 24 can also be maintained at a high voltage.

In addition, the terminals of the resistor R protrude from the frame (the second housing 22a and the fourth housing 24a) covering the side of the resistor group of the second resistor unit 22 and the fourth resistor unit 24 in the y direction. The distance between the tips of the terminals is shorter than the third distance d3, but since the interval adjusting member 20 having the width w1 longer than the second distance d2 is disposed therebetween, the distance between the tips of the terminals It will be longer than the second distance d2, and the insulation formed by the isolation can be maintained.

Even when the fourth base portion 14 and the sixth base portion 16 are arranged side by side without gaps in the y direction via the gap adjusting member 20, the fourth resistor unit 24 and the sixth resistor unit 26 are at least separated. The positional relationship between the third distance d3 (the sum of the first distance d1 and the width w1 of the interval adjusting member 20, that is, 600 mm or more) is 6600 V applied to the fourth resistor unit 24 and the sixth resistor unit 26, respectively. The high voltage can also maintain the insulation between the fourth resistance unit 24 and the sixth resistance unit 26.

In addition, the terminals of the resistor R protrude from the frame body (the fourth frame body 24a and the sixth frame body 26a) covering the side of the resistor group of the fourth resistor unit 24 and the sixth resistor unit 26 in the y direction. The distance between the tips of the terminals is shorter than the third distance d3, but since the interval adjusting member 20 having the width w1 longer than the second distance d2 is disposed therebetween, the distance between the tips of the terminals It will be longer than the second distance d2, and the insulation formed by the isolation can be maintained.

The first resistor unit 21 and the second resistor unit 22 are used for the load test of the P phase; the third resistor unit 23 and the fourth resistor unit 24 are used for the load test of the S phase; and the fifth resistor unit 25 and the sixth resistor unit 26, for the load test of the T phase.

Between the first cooling fan 31 to the sixth cooling fan 36 and the first to sixth resistor units 21 to 26, cooling air from the first cooling fan 31 to the sixth cooling fan 36 is provided to the first resistor. The tubular hoods (the first ventilating cover 31a to the sixth venting hood 36a) of the unit 21 to the sixth resistor unit 26 (shown by broken lines in FIGS. 1 and 2). The upper portion of the tubular hood is preferably located inside the frame (the first frame 21a to the sixth frame 26a) covering the side surface of the lowermost resistor group, and is separated from the frame by 10 mm or more. . The hood and the frame are made of an insulating material, and by providing isolation, dust or the like is not accumulated therebetween and insulation can be maintained.

Each of the first to sixth resistor units 21 to 26 has a specification (the number of resistors R or the number of resistors R) corresponding to the rated voltage of the power source to be tested when the power source load test is performed without connecting the resistor units in series. Resistance 値, etc.).

For example, each of the first to sixth resistor units 21 to 26 has a load test of a three-phase AC power supply by three of the first to sixth resistor units 21 to 26, and the test target power source The specification corresponding to the rated voltage (the number of resistors R or the resistor 値, etc.).

Each of the first cooling fan 31 to the sixth cooling fan 36 has a specification (cooling capability of the fan, etc.) for cooling the first to sixth resistor units 21 to 26, respectively, during the power load test.

The power supply connection unit 40 includes a vacuum circuit breaker (VCB: Vacuum Circuit Breaker) 41, an operation unit (not shown), and a control device 43 such as a CPU. The connection to the test object power source is performed through the vacuum circuit breaker 41. The operation unit selects the number of resistor groups connected to the power source of the test object, changes the load, and performs a power-on/off operation of the load tester 1 or an on-off operation of the first to sixth cooling fans 31 to 36. In response to the operation state of the load in the operation unit, the control device 43 performs on-off control of the switching devices (the first switch unit SW1 to the eighth switch unit SW8) of the connection switching unit 70, which will be described later, thereby performing the use. Switching of resistor groups.

The insulator 50 is used for the first to sixth resistor units 21 to 26 and the peripheral devices (the first base portion 11 to the sixth base portion 16 and the first cooling fan 31 to the sixth cooling fan) to which a high voltage is applied. Insulation between 36, etc.). Further, the insulator 50 is used for insulation between the main body portion 71 and the first bus bar 73 in the connection switching portion 70 to be described later, and insulation between the main body portion 71 and the resistance unit.

Further, for the purpose of insulation between the adjacent resistance units in the x direction, between the first resistance unit 21 and the second resistance unit 22, between the third resistance unit 23 and the fourth resistance unit 24, and the fifth It is also preferable to provide an insulator 50 between the resistor unit 25 and the sixth resistor unit 26 (see FIGS. 2 and 5).

The insulator 50 has a specification (size, etc.) corresponding to the rated voltage of the power source to be tested when the power source load test is performed using the resistor unit group, and the resistor unit group is adjacent to each other at intervals of the second distance d2 in the x direction. The resistor groups of the two resistance units (the first resistor unit 21 and the second resistor unit 22, the third resistor unit 23 and the fourth resistor unit 24, the fifth resistor unit 25, and the sixth resistor unit 26) are connected in series . In particular, the dimension of the insulator 50 provided in the lower portion of the resistor unit in the z direction has a length equal to or greater than the second distance d2.

For example, the insulator 50 has a specification (size, etc.) corresponding to the rated voltage of the power source to be tested when the load test of the three-phase AC power source is performed using three sets of the resistor unit group, and the resistor unit group is interposed by the x-direction. 2 two resistor units (the first resistor unit 21 and the second resistor unit 22, the third resistor unit 23 and the fourth resistor unit 24, the fifth resistor unit 25, and the sixth resistor unit 26) adjacent to each other at a distance d2 The resistor groups are connected in series.

In other words, the insulator 50 has a specification corresponding to twice the rated voltage of the test target power source corresponding to each of the first to sixth resistor units 21 to 26 or the first to third cooling fans 31 to 36.

For example, when each of the first to sixth resistor units 21 to 26 has a specification corresponding to a three-phase AC power supply of 6,600 V, the insulator 50 having a specification corresponding to a three-phase AC power supply of 13,200 V is used. At this time, the insulator 50 is used for a length of several centimeters longer than the insulator having a specification corresponding to a three-phase AC power supply of 6600V.

The connection cable 60 is a resistor group of two resistor units adjacent to each other with an interval of the second distance d2 in the x direction, that is, a resistor group adjacent to each other in the x direction (resistor R) Between the two, the cables are connected in series in a state where they can be loaded and unloaded at two places (above).

The cable 60 is connected to prepare three times the number of segments of the resistor group in the resistor unit (8 segments × 3 = 24 in the present embodiment), and each of the connection cables 60 will constitute a resistor of the resistor group. Among the resistors R, one of the terminals of the resistor unit close to the connection target, and the resistor R of the resistor group of the resistor unit connected to the terminal in the x direction, the terminal of the resistor R that is close to the terminal connection.

In this embodiment, the connection between the segments of the resistor group by the connection cable 60 is described, but it is not limited to the connection in each segment, and may be at least two places of the plurality of resistor groups. Above, the connection is made by the connection cable 60. The connection of one (the terminal of one of the resistors R) is easier to control the switching of the resistor group during the load test than the case where the two resistor units are connected in series. However, there are more connections and switching control is easier.

At both terminals of the connection cable 60, a ring terminal (shown as a black dot in FIG. 3 or FIG. 4) is provided by hooking the ring terminal on the terminal of the resistor R and screwing it (or The bolts are locked to connect the resistor R to the connecting cable 60 in a detachable state.

The resistor group of the two resistor units, that is, the resistor groups adjacent in the x direction, is connected in series using the connection cable 60.

In this case, one resistor unit group has twice the resistance 1 of one resistor unit, and the voltage of the test target power source subjected to the load test by one resistor unit is twice the voltage of the power source. Implemented.

For example, when each of the first to sixth resistor units 21 to 26 has a specification corresponding to a three-phase AC power supply of 6,600 V, by providing three resistor units, it is possible to implement a three-phase AC power supply of 13,200 V. Load test.

The voltage applied to one resistor cell group is twice the voltage applied to one resistor cell, and the insulator 50 is used in consideration of the voltage applied to one resistor cell group. The double voltage can maintain the insulation from the peripheral devices such as the first base portion 11 to the sixth base portion 16 or the first cooling fan 31 to the sixth cooling fan 36, or the like, or Insulation from the resistor unit.

The connection cable 60 is connected to each resistor group, and the connection of one (the terminal of one of the resistors R) can be compared with the case where the two resistor units are connected. Switching control of the group is simpler.

The first to sixth resistor units 21 to 26 or the first to third cooling fans 31 to 36 are preferably members that take the voltage of the test target power source in consideration of the load test performed by one resistor unit. Therefore, compared with the case where the number or length of the resistors R is increased and one resistor unit obtains the same specifications as one resistor unit group, the present invention can be realized more easily using the existing product.

In addition, the user can simply remove the connection cable 60 from the resistor R, and use only the first resistance unit 21, the third resistance unit 23, and the fifth resistance unit 25 (or only the second resistance unit 22, The 4 resistance unit 24 and the 6th resistance unit 26) can perform load test for a lower voltage power source than the load test using the connection cable 60.

By providing the isolation at the second distance d2 or more, the insulation between the resistance units arranged in the x direction becomes higher than in the case where the isolation is not provided. By providing the isolation of the third distance d3 or more, the insulation between the resistance units arranged side by side in the y direction becomes higher than that of the case where the isolation is not provided, and there is also an operator. It is easy to enter the work of wiring and the like between the resistor units (especially, the attachment and detachment of the connection cable 60).

Since the resistor R of each of the resistor units is arranged to extend in the y direction, the terminal protrudes from the housing in the y direction (projecting from the surface of the housing that is perpendicular to the y direction). Therefore, no terminal is provided on the surface perpendicular to the x direction in the casing of each of the resistance units, and there is less chance that the operator enters between the resistance units facing each other in the x direction. Therefore, the interval between the resistance units facing each other in the x direction may be such that a distance (second distance d2) is provided between the resistance units for the minimum insulation. However, as described above, in order to provide a wiring space such as a cable, it is also possible to configure a configuration in which the base portion is disposed such that the resistance units are spaced apart from each other by the second distance d2.

Each of the first base portion 11 to the sixth base portion 16 is formed as an individual individual, and a resistor unit or a cooling fan is attached to the base portion, and the base portion can be connected to another base portion. Carry the abutments. Therefore, if the overall size (width, height, and depth) of one base portion and the resistance unit is smaller than the entrance width, height, and depth of the elevator such as an elevator, the elevator can be used to carry one base portion. A combination of a resistor unit and a cooling fan.

In view of the provision of the positional relationship with the other base portion, the cable connection between the resistance units, or the connection of the power supply connection portion 40 to another device such as the first resistance unit 21, etc., it is necessary to perform the first to eighth steps, which will be described later. It is easier to perform the work after the loading, but it is easier to install the load tester 1 than the wiring in which the resistor unit or the cooling fan is fixed to the base portion or the inside of the resistor unit.

Further, since the frame of each of the resistor units is disposed on the inner side of the base portion, even if the base portions are placed in contact with each other, the respective resistance units do not contact each other, and the second distance is maintained. The interval above d2. Therefore, even if each of the base portions constitutes an individual independent individual, it can be easily disposed while maintaining insulation between the resistance units.

In particular, in the present invention, since the second distance d2 is set to 90 mm or more, even when a voltage of 6600 V is applied to two adjacent resistance units, the insulation between the two resistance units can be maintained.

When the elevator has a size capable of simultaneously loading two base portions, that is, when the combination of the two base portions, the resistance unit, and the cooling fan are adjacent in the x direction, the overall size (width, height, depth), respectively When the width, height, and depth of the entrance and exit of the elevator are smaller than the width, height, and depth of the elevator, the two base portions (for example, the first base portion 11 and the second base portion 12) adjacent to each other in the x direction may be connected to each other, and the connection cable 60 may be used. The resistor units mounted on the base portion are connected to each other in a state of being connected to each other.

In this case, the first base portion 11 and the second base portion 12, the third base portion 13 and the fourth base portion 14, the fifth base portion 15 and the sixth base portion 16 may be integrated. The appearance (see Figure 7). FIG. 7 shows that the seventh base portion 17 is an integrated base portion including the first base portion 11 and the second base portion 12, and the eighth base portion 18 includes the third base portion 13 and The integrated base portion and the ninth base portion 19 including the fourth base portion 14 are an embodiment of an integrated base portion including the fifth base portion 15 and the sixth base portion 16.

In this embodiment, the resistor R in the resistor group is connected in series, but the connection method of the terminal of the resistor R and the terminal of the other resistor R may be changed, and some or all of them may be connected in parallel. . Therefore, it is also possible to configure a method of connecting the resistors R in the resistor group to a series or parallel connection by using a shorting bar and passing through the switching member. At this time, by making a large number of parallel connections in the resistor group, the load test of the low-voltage three-phase AC power supply can be performed.

In addition, the description is made on the case where the connection group of the resistor unit of the resistor unit and the resistor group of the other resistor unit are connected using the connection cable 60, but the connection member between the resistor groups is not limited to the cable. For example, similarly to the shorting bar between the terminals of the connection resistor R, a configuration in which the resistor group and the other resistor group are connected by the shorting bar 61 may be formed (see FIG. 8).

In addition, in this embodiment, the connection of the connecting cable 60 or the shorting bar 61 and the resistor R is directly performed, but the fixed contact 81, the movable contact 83, and the driving movable can be formed through the transmission. The drive member 85 of the contact 83 includes a switch member 80 that is filled with a casing 87 of an inert gas such as nitrogen gas (see FIGS. 9 to 12).

Specifically, the switch member 80 has a fixed contact 81, a movable contact 83, a drive member 85, a wire 86, a housing 87, and a resistor disposed in the resistor group and connected to the connection cable 60 or the shorting bar 61. Near the terminal of R.

A terminal (first terminal 81a) that protrudes from one of the fixed contacts 81 of the switch member 80 toward the outside of the case 87 is connected to the terminal of the resistor R, and a terminal that protrudes from the other to the outside of the case 87 (the first) The 2 terminal 81b) is connected to one of the connection cable 60 or the shorting bar 61. The resistor R is often connected to the first terminal 81a, and the connection cable 60 or the connection between the shorting bar 61 and the second terminal 81b is performed when the resistor unit is to be connected. An insulating wall 88 is preferably provided between the first terminal 81a and the second terminal 81b so as to prevent the first terminal 81a from being accidentally touched when the connection cable 60 or the shorting bar 61 is attached to the second terminal 81b. Short-circuiting between the first terminal 81a and the second terminal 81b is also avoided (see Fig. 11).

The movable contact 83 is driven by the driving member 85, and performs switching between an ON state in contact with the fixed contact 81 and a OFF state in contact with the fixed contact 81. The connection of the connection cable 60 or the shorting bar 61 and the second terminal 81b is performed in a disconnected state.

The drive member 85 is connected to the control device 43 of the power supply connection unit 40 via a wire (control signal line) 86, and is controlled by the control device 43 of the power supply connection unit 40 (switching control between the on state and the off state).

The casing 87 is provided with a fixed contact 81, a movable contact 83, and a driving member 85, and is internally filled with an inert gas.

When the connection cable 60 or the connection between the shorting bar 61 and the switch member 80 (second terminal 81b) is performed in a disconnected state in which the fixed contact 81 and the movable contact 83 are not in contact, the leakage current of the resistance unit can be reduced. Externally, there is a risk of electric shock to the user holding the connection cable 60 or the shorting bar 61.

Further, since the casing 87 is filled with the inert gas, the fixed contact 81 and the movable contact 83 are not in contact with each other (or immediately before the conductive state), and between the fixed contact 81 and the movable contact 83. The possibility of sparking is also low.

In addition, the cable (the first cable 82a and the second cable 82b) protruding from the fixed contact 81 to the outside of the casing 87 may be configured as the first terminal 81a and the second terminal 81b (see the figure). 13).

One of the first cables 82a is connected to one of the fixed contacts 81, and the other of the first cables 82a is connected to the resistor R. One of the second cables 82b is connected to the other of the fixed contacts 81, and the other of the second cables 82b is connected to the connection cable 60 or the shorting bar 61.

Inside the casing 87, a region where the first cable 82a is in contact with the fixed contact 81, a region where the second cable 82b is in contact with the fixed contact 81, and an area including the fixed contact 81 and the movable contact 83. The inside of the hermetic container 90 is filled with an inert gas such as nitrogen gas. Between the sealed container 90 and the casing 87, an insulating member such as butyl rubber is filled in a region including at least the first cable 82a and the second cable 82b to prevent the first cable 82a and the second cable The cable 82b is shorted.

Fig. 13 shows a state in which the insulating member is filled with respect to the entire area between the hermetic container 90 and the casing 87, and the area filled with the insulating member is displayed as a checkered pattern. A control terminal 89 extending from the driving member 85 at the bottom of the casing 87 is connected to a wire (control signal line) 86 (not shown in Fig. 13) composed of a multi-core cable or the like.

Further, one of the first cable 82a and the fixed contact 81, the other of the second cable 82b and the fixed contact 81 may be formed of an individual member as shown in FIG. 13, or may be integrated. The front ends of the first cable 82a and the second cable 82b function as fixed contacts 81 and are in contact with the movable contact 83.

Next, the wiring between the power supply connecting portion 40 and each of the resistance units will be described. The resistor group of the first resistance unit 21 (the 11th resistor group R11 to the 18th resistor group R18) and the resistor group of the third resistor unit 23 (the 31st resistor group R31 to the 38th resistor group R38), The resistor group (the 51st resistor group R51 to the 58th resistor group R58) of the fifth resistor unit 25 is transmitted through the housing (the first housing 21a, the third housing 23a, and the fifth frame) attached to the resistor unit. The connection switching unit 70 of the body 25a) is connected to the power supply connection unit 40.

The connection switching unit 70 includes a main body portion 71, a first bus bar 73, a mounting metal frame 75, a second bus bar 77, and first to eighth switch portions SW1 to SW8.

The main body portion 71 has a U-shaped cross section or a C-shape and extends in the z direction. In the present embodiment, the cross section has a U-shaped cross section, the intermediate portion 71a having a surface parallel to the back surface of the resistor unit, and the end portion extending from the end portion of the resistor portion are parallel to the side surface of the resistor unit. The first side surface portion 71b1 and the second side surface portion 71b2 of the surface are formed, and the intermediate portion 71a, the first side surface portion 71b1, and the second side surface portion 71b2 form an example of the U-shaped or C-shaped cross-sectional shape.

When the main body portion 71 is formed of a conductive member such as stainless steel, the first bus bar 73 and the first switch portion SW1 to the eighth switch portion SW8 through which the load test current flows are interposed between the insulator 50 and the like. Since they are isolated from each other, the load test current does not flow through the body portion 71. Further, when the main body portion 71 is made of a conductive member such as stainless steel, in order to protect the internal control signal line, it is preferable to ground the ground line from the first side surface portion 71b1 or the like (see FIG. 17).

At least two insulators 50 extending in the y direction are provided outside the intermediate portion 71a (first surface), and the first switch portions SW1 to 8 extending in the y direction of the tubular portion are provided between the insulators 50 Switch unit SW8. The control signal lines of the first switch unit SW1 to the eighth switch unit SW8 are housed inside the intermediate portion 71a.

It is preferable to provide a cover portion 71c made of a transparent material such as polycarbonate, in a portion opposed to the inner side of the intermediate portion 71a so that a member such as a control signal line can be observed from the outside. The cover portion 71c may be integrally formed with the second side surface portion 71b2, and the second side surface portion 71b2 may be formed of a transparent material such as polycarbonate. At this time, the intermediate portion 71a is formed integrally with the first side surface portion 71b1.

Further, a cover portion 71d is preferably provided on the upper portion of the main body portion 71 to prevent moisture or the like from entering the inside. The lid portion 71d is omitted in the drawings other than those in Figs. 17 and 22 .

The first side surface portion 71b1 (the second surface is perpendicular to the first surface) is provided with at least two insulators 50 extending in the x direction, the second side surface portion 71b2, and the resistor unit (the first resistor unit 21 and the third resistor) The side faces of the unit 23 or the fifth resistor unit 25) oppose each other without being in contact.

In a state in which the intermediate portion 71a and the first side surface portion 71b1 are disposed such that the switch portion is located between the terminal of the resistor R connected to the cable and the switch portion and the first bus bar 73, the connection switching portion 70 is attached to the resistor. The unit (the first resistor unit 21, the third resistor unit 23, and the fifth resistor unit 25).

The first bus bar 73 is a copper conductive member extending in the z direction, and is attached to the main body portion 71 (the first side surface portion 71b1) through the insulator 50 extending in the x direction with a predetermined interval (second distance d2). And connected to one of the power supply lines (U phase line LU, V phase line LV, W phase line LW) from the test object power supply. The first bus bar 73 attached to the connection switching unit 70 of the first resistance unit 21 is connected to the U-phase line LU. The U-phase line LU is connected to the P-phase terminal of the test target power source through the vacuum circuit breaker 41. The first bus bar 73 attached to the connection switching unit 70 of the third resistor unit 23 is connected to the V-phase line LV. The V-phase line LV is connected to the S-phase terminal of the test target power source through the vacuum circuit breaker 41. The first bus bar 73 attached to the connection switching unit 70 of the fifth resistor unit 25 is connected to the W phase line LW. The W phase line LW is connected to the T phase terminal of the test object power source through the vacuum circuit breaker 41.

The mounting metal frame 75 is made of stainless steel and has an L-shaped or U-shaped cross section, and extends in the x direction, and is connected to the insulator 50 and the resistor which are attached so as to extend from the back surface (the intermediate portion 71a) of the main body portion 71 in the y direction. The rear surface of the unit casing (the first housing 21a, the third housing 23a, and the fifth housing 25a) is attached to the resistor unit (the first resistor unit 21, the third resistor unit 23, and the 5 resistor unit 25).

The first switch portion SW1 has the same structure as the switch member 80 shown in FIG. 13, and one of the terminals is connected to the first bus bar 73 by a cable, and the other terminal is connected to the resistor of the first stage from above. The resistors R of the group (the eleventh resistor group R11, the 31st resistor group R31, or the 51st resistor group R51) are connected by a cable. The second switch portion SW2 has the same structure as the switch member 80 shown in FIG. 13, and one of the terminals is connected to the first bus bar 73 by a cable, and the other terminal is connected to the second segment of the resistor from above. The resistors R of the group (the 12th resistor group R12, the 32nd resistor group R32, or the 52nd resistor group R52) are connected by a cable. The third switch portion SW3 has the same structure as the switch member 80 shown in FIG. 13, and one of the terminals is connected to the first bus bar 73 by a cable, and the other terminal is connected to the third segment of the resistor from above. The resistors R of the group (the 13th resistor group R13, the 33rd resistor group R33, or the 53rd resistor group R53) are connected by a cable. The fourth switch portion SW4 has the same structure as the switch member 80 shown in FIG. 13, in which one terminal is connected to the first bus bar 73 by a cable, and the other terminal is connected to the fourth segment resistor from above. The resistors R of the group (the 14th resistor group R14, the 34th resistor group R34, or the 54th resistor group R54) are connected by a cable. The fifth switch portion SW5 has the same structure as the switch member 80 shown in FIG. 13, in which one terminal is connected to the first bus bar 73 by a cable, and the other terminal is connected to the fifth segment resistor from above. The resistors R of the group (the 15th resistor group R15, the 35th resistor group R35, or the 55th resistor group R55) are connected by a cable. The sixth switch portion SW6 has the same structure as the switch member 80 shown in FIG. 13, in which one terminal is connected to the first bus bar 73 by a cable, and the other terminal is connected to the sixth segment resistor from above. The resistors R of the group (the 16th resistor group R16, the 36th resistor group R36, or the 56th resistor group R56) are connected by a cable. The seventh switch portion SW7 has the same structure as the switch member 80 shown in FIG. 13, in which one terminal is connected to the first bus bar 73 by a cable, and the other terminal is connected to the seventh segment resistor from above. The resistors R of the group (the 17th resistor group R17, the 37th resistor group R37, or the 57th resistor group R57) are connected by a cable. The eighth switch portion SW8 has the same structure as the switch member 80 shown in FIG. 13, in which one terminal is connected to the first bus bar 73 by a cable, and the other terminal is connected to the eighth segment resistor from above. The resistors R of the group (the 18th resistor group R18, the 37th resistor group R38, or the 58th resistor group R58) are connected by a cable.

The switch portion is connected to the cable of the first bus bar 73, and the switch portion is connected to the cable of the resistor R. As shown in FIG. 13, the cable can be attached using a fixed contact included in the switch member 80 ( In a state in which the first cable 82a connected to the first bus bar 73 and the second cable 82b connected to the resistor are connected, a terminal may be provided at the fixed contact, and a cable connected to the terminal may be used. The way to connect.

The control signal line (corresponding to the lead wire 86 of the switch member 80) of the first switch unit SW1 to the eighth switch unit SW8 is surrounded by the intermediate portion 71a, the first side surface portion 71b1, the second side surface portion 71b2, and the cover portion 71c. It is connected to the control device 43 of the power supply connection unit 40. The switch unit (the first switch unit SW1 to the eighth switch unit SW8), the cable connecting the switch unit and the resistor, and the cable connecting the switch unit and the first bus bar 73 are provided in the intermediate portion 71a and the first side surface portion 71b1. The outer side of the region surrounded by the second side surface portion 71b2 and the cover portion 71c.

The wire 86 constituting the control signal line includes two lines of positive and negative. The positive line (eight lines corresponding to the first switch unit SW1 to the eighth switch unit SW8) is connected to the control device 43. The negative line (eight lines corresponding to the first switch unit SW1 to the eighth switch unit SW8) is connected to the second bus bar 77, and is made of copper which is provided inside the main body portion 71 via an insulator and extends in the z direction. Constructed by a conductive member. One negative line is connected to the control device 43 through the second bus bar 77. Therefore, in the present embodiment, eight positive lines and one negative line corresponding to the first switch unit SW1 to the eighth switch unit SW8 are disposed as control signal lines in the respective connection switching units 70 and the control device 43. between. The second bus bar 77 is shown in FIGS. 19 and 20 in which the inside of the connection switching portion 70 is seen.

The connection between the control signal line (the positive line and the negative line) and the switch portion may be a mode in which the cable is directly connected to the switch portion. However, for easy loading and unloading, it is preferable to pass through the first connector C1 provided in the vicinity of each switch portion. get on. 17 shows a state in which the portion corresponding to the control terminal 89 in the first switch portion SW1 is connected to the control signal line through the first connector C1 (the first connector of the second switch portion SW2 to the eighth switch portion SW8) The pattern of C1 is omitted).

In addition, as shown in FIG. 22, the second connector C2 connected to the plurality of control signal lines (eight positive lines and negative lines corresponding to the first switch unit SW1 to the eighth switch unit SW8) may be provided. Outside the connection switching unit 70, the second connector C2 is connected to the connection switching unit 70 (the cable inside the connection switching unit 70), and further connected to the first switching unit SW1 to the eighth switching unit SW8. At this time, the wiring operation of the connection switching unit 70 and the control signal line is easier to perform, and when any one of the switch units fails, the entire connection switching unit 70 can be easily replaced.

The control device 43 executes the connection switching unit attached to the first resistance unit 21, the third resistance unit 23, and the fifth resistance unit 25 by using the control signal line in response to the operation state of the load provided in the operation unit of the power supply connection unit 40. The switching control of the switching devices (the first switching portion SW1 to the eighth switching portion SW8) of 70 is performed, whereby switching control of the resistor group for load test is performed.

The control device 43 is provided with a control relay (eight control relays corresponding to the first switch unit SW1 to the eighth switch unit SW8) 43a, and the control device 43 transmits the switch device (the first switch unit SW1 to the eighth unit). The ON/OFF control of the switch unit SW8) is a preferred embodiment.

At this time, as shown in FIG. 14 or FIG. 15, the positive lines (eight × 3 groups, a total of 24 positive lines) of the control signal lines from the respective switch sections are grouped into three groups, and are wired to the control device 43. Eight control relays 43a are provided. Further, the negative lines (1 × 3 groups, total 3 negative lines) of the control signal lines from the connection switching units 70 are connected to the eight control relays 43a. In the case of branching, another bus bar (not shown) may be disposed in the vicinity of the control device 43, and the connection of the eight control relays 43a to the negative line may be performed.

Therefore, the control signal line connected to the nth switch portion SWn (n is 1 or more and 8 or less) of each of the resistance units (the first resistance unit 21, the third resistance unit 23, and the fifth resistance unit 25) is short-circuited, and Only the control signal line including the eight positive lines and one negative line is connected to the control device 43 (see FIGS. 23 and 24), and the wiring around the control device 43 (the eighth step to be described later) Although it is complicated, it has the advantage of protecting the control circuit when one of the switch parts fails, reducing the influence on other switch parts (preventing damage to other switch parts).

In the case of the aspect shown in FIG. 14 or FIG. 15, or in the case of the aspect shown in FIG. 23 or FIG. 24, each of the first resistance unit 21, the third resistance unit 23, or the fifth resistance unit 25 is used. The nth switch portion SWn (n is 1 or more and 8 or less) of the connection switching unit 70 to be mounted is subjected to the on/off control at the same timing.

For example, when the first switch portion SW1 of the connection switching unit 70 to which the first resistor unit 21 is mounted is in an ON state, the first switch portion SW1 of the connection switching portion 70 to which the third resistor unit 23 and the fifth resistor unit 25 are mounted is connected. It is also in a conducting state. In this case, the electric power of the P phase from the power source to be tested is supplied to the eleventh resistor group R11 and the twenty-first resistor group R21, and the S phase from the power source of the test object is supplied to the 31st resistor group R31 and the 41st resistor group R41. The electric power is supplied to the 51st resistor group R51 and the 61st resistor group R61 by the power of the T phase from the power source of the test (see FIG. 18).

By performing the following steps, the wiring operation of the load tester 1 can be completed: the resistor groups of the three resistor units (the second resistor unit 22, the fourth resistor unit 24, and the sixth resistor unit 26) are connected in the middle. Point connection (first step); connecting each resistor group of the resistor unit adjacent in the x direction (for example, the resistor group of the first resistor unit 21 and the resistor group of the second resistor unit 22) The cable 60 is connected (second step); the connection switching unit 70 is attached to the three resistor units (the first resistor unit 21, the third resistor unit 23, and the fifth resistor unit 25) (third step); The resistor group is connected by a cable (fourth step); the U-phase line LU is disposed between the power source connection portion 40 and the first bus bar 73 of the connection switching unit 70 attached to the first resistor unit 21 (step 5) The V-phase line LV is disposed between the power source connection portion 40 and the first bus bar 73 of the connection switching portion 70 of the third resistor unit 23 (the sixth step); and the W-phase line LW is disposed at the power source connection portion. 40 is connected between the first bus bar 73 of the connection switching unit 70 mounted on the fifth resistance unit 25 (the seventh step); And the control signal line is disposed in each of the switching portions (step 8) between the connecting portion 40 and the power supply 70 three connection switching unit.

The mounting of the resistor R in the resistor unit is connected to the cable between the switch portion in the connection switching portion 70 and the first bus bar 73, and can be completed in advance before the load tester 1 is transported to the installation site. Therefore, after the resistor unit mounted on the base portion is installed in a predetermined place, the connection switching unit 70 including the first bus bar 73 and the switch unit is used to perform the operations including the first step to the eighth step. The wiring work constituting the components of the load testing machine 1 is efficiently performed.

In particular, since the connection switching unit 70 is attached to the resistor unit such that the switch portion is disposed between the terminal of the resistor R connected to the cable and the switch unit and the first bus bar 73, a short connection member (cable, etc.) can be used. The connection between the resistor group and the switch unit, and the switch unit and the first bus bar 73 is performed.

Further, when the elevator has a size in which the resistor unit and the base portion of the connection switching portion 70 can be mounted, that is, the entire size of the entire group of the base portion, the resistor unit to which the connection switching portion 70 is attached, and the cooling fan When the width, height, and depth are respectively smaller than the entrance width, height, and depth of the elevator, the third step and the fourth step may be configured in advance before the load tester 1 is transported to the installation site.

The resistor group of each resistor unit is connected to the power source connection unit 40 by a cable, and the switching device provided in the power source connection unit 40 is used to perform switching control of the resistor group to be used. In other words, by using the connection switching unit 70, the number of connection cables of the resistance unit and the power supply connection portion 40 can be reduced, and this also has the advantage of simplifying wiring.

In the case where the first switch portion SW1 to the eighth switch portion SW8 provided in the connection switching unit 70 are configured by a switch member having high durability by being filled with an inert gas therein, there is still a problem of frequent on/off operation. The possibility of damage. In the present embodiment, since the switch portion having a higher possibility of damage than the other members is provided in the connection switching portion 70, the maintenance is easier.

Further, since the intermediate portion 71a of the connection switching portion 70 is located between the first side surface portion 71b1 of the main body portion 71 and the side surface of the resistor unit, and the switch portion is attached to the intermediate portion 71a, it is easier to ensure the exchange of the switch portion or Repair and other space for maintenance.

Further, since the main body portion 71 of the connection switching portion 70 is detachably attached to the resistor unit through the insulator 50 and the mounting metal frame 75, the connection switching portion 70 including the damaged switch portion is replaced with a new one. The repair of the switching unit 70 or the like is also easy to perform.

The connection switching unit 70 may be attached to the side of the resistance unit. However, if there is a space in which the connection switching unit 70 is disposed between the resistance units adjacent to the resistance unit in the y direction, the connection switching unit 70 may be The front or rear portion of the resistor unit is mounted with the connection switching portion 70 (see Fig. 19).

In the present embodiment, the first surface (intermediate portion 71a) to which the switch unit is attached is parallel to the back surface of the resistor unit, and the second surface (first side surface portion 71b1) to which the first bus bar 73 is attached and the resistor unit are described. In the positional relationship in which the side faces are parallel, the connection switching unit 70 is attached to the resistor unit, but the terminal of the resistor R and the first bus bar 73 which are disposed in the maintenance switch unit and connected to the cable and the switch unit may be formed. On the premise of the positional relationship between the first surface (intermediate portion 71a) and the side surface of the resistor unit, the second surface (first side surface portion 71b1) to which the first bus bar 73 is attached and the back surface of the resistor unit are provided. In the parallel positional relationship, the connection switching unit 70 is attached to the resistance unit (see Fig. 20).

In addition, although the insulator 50 and the mounting metal frame 75 extending in the y direction are used, the connection switching unit 70 is attached to the resistor unit, but the second side surface portion 71b2 may be used and used in the x. The insulator 50 extending in the direction is attached to the resistor unit 70 (see FIG. 21).

Further, it is not limited to the case where the six resistance units are combined into a load tester for each of the two groups, and as long as the two resistance units are provided, the effects of the present invention (easily handled, set, etc.) can be obtained.

In addition, in the embodiment shown in FIG. 1 to FIG. 24, a resistor unit (having an intake port and an exhaust opening that is open in the vertical direction) is disposed above the cooling fan that sucks air from the bottom surface and blows cooling air to the top surface. The resistance unit of the port is configured to allow the cooling air to flow upward from below, but it is also possible to form a resistor unit (with a suction opening in the horizontal direction) via the insulator 50 in front of the cooling fan that discharges the wind in the horizontal direction. The electric resistance of the port and the exhaust port) causes the cooling air to flow from the rear to the front (see Fig. 25).

25 shows that two resistance units (first resistance unit 21) are disposed beside the two base portions [the first base portion (first cooling portion) 11 and the second base portion (second cooling portion) 12]. The state of the second resistance unit 22) (the figure of the other resistance unit connected by the neutral point connection method is omitted).

In the embodiment shown in FIG. 25 and FIG. 26, the horizontal direction in which the first base portion (first cooling portion) 11 and the second base portion (second cooling portion) 12 are arranged is the x direction, The horizontal direction of the base unit 11 and the first resistor unit 21 in parallel is the y direction, and the vertical direction perpendicular to the y direction and the x direction is the z direction.

The embodiment shown in FIG. 25 or FIG. 26 illustrates that the resistor R is arranged to extend in the horizontal direction (parallel to the x direction), but the direction in which the resistor R is disposed may also be configured to be vertical. A pattern that extends in the direction (parallel to the z direction).

In order to support the resistor unit, the insulator 50 is preferably disposed between the resistor unit and the mounting surface.

Since the suction of the cooling fan is performed from the back surface, the intake port on the side surface of the base portion (cooling portion) can be omitted.

When the resistor unit and the cooling fan are arranged in the direction of the cooling fan, it is preferably arranged to change the exhaust direction from the  direction to the upper direction and the hot air to the upper side at a position downstream of the air flow path than the resistance unit. The air duct (having an air inlet opening in the horizontal direction and an air outlet opening in the vertical direction, and exhausting the air duct upward), and inhaling the air outlet of the resistor unit and the air duct The ports are opposed to each other such that the resistance unit is connected to the air guide in a detachable state (refer to Fig. 26).

26, in order to show the internal structure, it is shown in a state in which the air guide is separated from the resistance unit, but in actual use (at the time of load test), in order to prevent hot air from leaking, the air inlet and the resistance unit of the air duct The exhaust ports are arranged in a state of being close to each other.

Further, each of the resistance units may be a plurality of resistor groups in which the resistors R parallel to the x direction are arranged in the z direction (vertical direction) in the y direction (horizontal direction) (see FIGS. 25 and 26). Alternatively, the resistor group R parallel to the x direction may be arranged side by side in the z direction (vertical direction) in the y direction (horizontal direction) (see FIG. 27). In either case, the switching of the resistor group used can be performed, the load condition of the power source of the test object is changed, and the load test is performed.

In either case, the frame of the resistor unit (the outer shape of the resistor unit and the front surface and the back surface constituting the intake port and the exhaust port) are located at least in a positional relationship with the adjacent resistor unit. The surfaces are disposed at a distance 1 from the side of the base portion (cooling portion) (the outer shape of the cooling portion and the front surface and the back surface of the air inlet and the exhaust port).

In either case, in the resistor unit, the positional relationship between the terminal of the resistor R connected to the cable and the switch unit and the first bus bar 73 is arranged in the switch unit, and the connection switching unit 70 is mounted.

In either case, the state in which the resistance unit is placed on the base portion (cooling portion) in the relationship of the internal space of the elevator (the state of FIGS. 25 to 27 is changed to the vertical state) Under the circumstances, consider the implementation of handling.

Further, in the present embodiment, the configuration of the connection switching unit 70 will be described using a load tester 1 in which six resistance units are combined into two groups. However, the configuration of the resistor unit using the connection switching portion 70 is not limited to a load tester in which six resistor units are combined into two groups, even if the resistor unit and the connection switching unit 70 are combined into one group of loads. In the test machine, the connection switching unit 70 including the first bus bar and the switch unit of the present embodiment can be used to efficiently carry out the wiring of the members constituting the load tester.

1‧‧‧ dry load tester
11～19‧‧‧1st base station to ninth base station
20‧‧‧Interval adjustment components
21～26‧‧‧1st to 6th resistor unit
21a～26a‧‧‧1st frame to 6th frame
31～36‧‧‧1st cooling fan to 6th cooling fan
31a～36a‧‧‧1st hood to 6th hood
40‧‧‧Power connection
41‧‧‧Vacuum circuit breaker
43‧‧‧Control device
43a‧‧‧Control relay
50‧‧‧Insulator
60‧‧‧Connecting cable
61‧‧‧Short bar
70‧‧‧Connection Switching Department
71‧‧‧ Body Department
71a‧‧‧Intermediate
71b1, 71b2‧‧‧1st side part, 2nd side part
71c‧‧‧ Cover
71d‧‧‧盖部
73‧‧‧1st busbar
75‧‧‧Installation metal frame
77‧‧‧2nd busbar
80‧‧‧Switch components
81‧‧‧Fixed joints
81a, 81b‧‧‧1st terminal, 2nd terminal
82a, 82b‧‧‧1st cable, 2nd cable
83‧‧‧ movable contact
85‧‧‧ drive components
86‧‧‧ wire
87‧‧‧Shell
88‧‧‧Insulated wall
89‧‧‧Control terminals
90‧‧‧Contained container (internal housing)
C1, C2‧‧‧1st connector, 2nd connector
D1 to d3‧‧‧1st to 3rd distance
LU‧‧U phase
LV‧‧V phase
LW‧‧W phase
SW1 to SW8‧‧‧1st switch part to 8th switch part
R‧‧‧Resistors
R11～R18‧‧‧ resistor group
R21～R28‧‧‧ resistor group
R31～R38‧‧‧ resistor group
R41～R48‧‧‧ resistor group
R51～R58‧‧‧ resistor group
R61～R68‧‧‧ resistor group
W1‧‧‧Width
x, y, z‧‧ direction
P‧‧‧P phase terminal
S‧‧S phase terminal
T‧‧‧T phase terminal

Fig. 1 is a plan view showing a dry load tester according to the present embodiment, in a state in which each base portion is adjacent to each other. Fig. 2 is a plan view showing a dry load tester according to the present embodiment, in a state in which the respective base portions are adjacent to each other. [Fig. 3] A perspective view showing the structures of the first to sixth resistor units, the first base portion to the sixth base portion, the insulator, and the first to sixth cooling fans. FIG. 4 is a perspective view showing a structure of a first resistance unit, a second resistance unit, an insulator, a first base portion, and a second base portion. FIG. 5 is a rear elevational view showing the structure of the first resistance unit, the second resistance unit, the insulator, the first base portion, and the second base portion. FIG. 6 is a side view showing a structure of a first resistance unit, a third resistance unit, an insulator, a first base portion, and a third base portion. Fig. 7 is a plan view showing a dry load tester according to the present embodiment, which is an integral part of the base portion adjacent in the x direction. FIG. 8 shows the structure of the first resistor unit, the second resistor unit, the insulator, the first base portion, and the second base portion in the aspect in which the connecting cable of FIG. 5 is replaced with a shorting bar. view. FIG. 9 is a perspective view showing a structure of a first resistance unit, a second resistance unit, an insulator, a first base portion, and a second base portion in a connection state using a switch member. FIG. 10 is a rear elevational view showing the structure of the first resistor unit, the second resistor unit, the insulator, the first base portion, and the second base portion in the connection state using the switch member. [Fig. 11] A perspective view of a switch member. Fig. 12 is a cross-sectional structural view showing a switch member. Fig. 13 is a cross-sectional structural view showing a switch member having a structure different from that of Fig. 12 . [Fig. 14] A plan view of a dry load tester according to the present embodiment, in a state in which the respective base portions are adjacent to each other, and showing wiring between the power supply connecting portion and the resistor unit. [Fig. 15] A perspective view showing the structures of the first to sixth resistor units, the first base portion to the sixth base portion, the insulator, the first cooling fan to the sixth cooling fan, and the connection switching portion, and shows The connection switching unit is attached to the first resistor unit, the third resistor unit, and the fifth resistor unit. FIG. 16 is a perspective view showing a structure of a first resistance unit, a second resistance unit, an insulator, a first base portion, and a second base portion, and shows that the connection switching portion is attached to a side portion of the first resistance unit. status. Fig. 17 is a perspective view showing a connection switching unit. [Fig. 18] A schematic diagram showing a circuit configuration of a load tester. FIG. 19 is a perspective view showing a structure of a first resistor unit, a second resistor unit, an insulator, a first base portion, and a second base portion, and shows a state in which the connection switching portion is attached to the rear portion of the first resistor unit. . FIG. 20 is a perspective view showing a structure of a first resistor unit, a second resistor unit, an insulator, a first base portion, and a second base portion, and shows a state in which the intermediate portion is parallel to the side surface of the resistor unit. The connection switching unit is attached to the first resistor unit. FIG. 21 is a perspective view showing a structure of a first resistance unit, a second resistance unit, an insulator, a first base portion, and a second base portion, and shows that the second side surface portion is used and extends in the x direction. The insulator is in a state in which the connection switching portion is attached to the first resistor unit. Fig. 22 is a perspective view of a connection switching unit connected to a control signal line by a second connector. FIG. 23 is a plan view showing a wiring between a power supply connection portion and a resistance unit in a state in which a control signal line of a switch portion corresponding to the same number of resistor groups is short-circuited and connected to a control device. [Fig. 24] The first resistive unit to the sixth resistive unit and the first base unit to the first aspect in the case where the control signal line of the switch unit corresponding to the same number of resistor groups is short-circuited and connected to the control device 6 is a perspective view showing the structure of the base portion, the insulator, the first cooling fan to the sixth cooling fan, and the connection switching portion. [Fig. 25] In the aspect in which the cooling fan is disposed next to the resistor unit in which the resistor group is arranged in the horizontal direction, the first resistor unit, the second resistor unit, the insulator, the first base portion, and the second base are provided. A perspective view of the structure of the platform. Fig. 26 is a perspective view showing a state in which an air guide duct is disposed in Fig. 25 . [Fig. 27] In the aspect in which the cooling fan is disposed next to the resistor unit in which the resistor group is arranged in the vertical direction, the first resistor unit, the second resistor unit, the insulator, the first base portion, and the second base are provided. A perspective view of the structure of the platform.

1‧‧‧ dry load tester

11‧‧‧1st base station

13‧‧‧3rd Abutment

15‧‧‧5th Abutment

16‧‧‧6th Abutment

20‧‧‧Interval adjustment components

21~26‧‧‧1st resistor unit~6th resistor unit

21a~26a‧‧‧1st frame~6th frame

31‧‧‧1st cooling fan

33‧‧‧3rd cooling fan

35‧‧‧5th cooling fan

36‧‧‧6th cooling fan

31a‧‧‧1st hood

33a‧‧‧3rd hood

35a‧‧‧5th hood

36a‧‧‧6th hood

50‧‧‧Insulator

60‧‧‧Connecting cable

D1~d3‧‧‧1st distance~3rd distance

W1‧‧‧Width

x, y, z‧‧ direction

Claims (12)

A load testing machine, characterized in that: two or more resistor units are provided, and each resistor unit comprises: a plurality of resistor groups arranged in a vertical direction, that is, in the z direction, each resistor group is in a horizontal direction a side-by-side resistor; and a frame body made of an insulating material and covering the side faces of the resistor groups; and two or more base portions having a cooling fan provided therein; At least one or more of the resistor units are mounted on the upper portion of each of the base portions via an insulator; and at least the surface of the frame that is in a positional relationship with the other resistor units is disposed on the surface as viewed from above. The side surface of the base portion of the resistor unit is further at the inner first distance; the two or more resistor units are adjacent to the resistor unit, and the frame of the adjacent resistor unit is The interval is parallel to the second distance or more; the second distance is twice the first distance, and the first distance is 45 mm or more. The load tester according to claim 1, wherein the resistor unit includes a first to sixth resistor unit; the cooling fan includes a first to sixth cooling fan; and the base includes a first base a first to sixth base portion; the first cooling fan is disposed in the first base portion, and the first resistor unit is mounted on the upper portion of the first base portion via the insulator; the second base portion The second cooling fan is disposed therein, and the second resistor unit is mounted on the upper portion of the second base portion via the insulator; the third cooling fan is disposed in the third base portion, and the third base is disposed on the third base The third resistor unit is mounted on the upper portion of the portion; the fourth cooling fan is disposed in the fourth base portion, and the fourth resistor unit is mounted on the upper portion of the fourth base portion via the insulator; The fifth cooling fan is disposed in the fifth base portion, and the fifth resistor unit is mounted on the upper portion of the fifth base portion via the insulator; the sixth cooling fan is disposed in the sixth base portion, and The sixth resistor unit is mounted on the upper portion of the sixth base portion via the insulator; the first base portion and the third base portion are And the fifth base portion constitutes an individual individual; the second base portion, the fourth base portion, and the sixth base portion each constitute an individual independent; the first resistance unit and the second unit The resistor unit is arranged in the x direction perpendicular to the z direction across the interval of the second distance or more; and the third resistor unit and the fourth resistor unit are spaced apart from each other by the interval of the second distance or more The fifth resistor unit and the sixth resistor unit are arranged side by side in the x direction with an interval of the second distance or more; the first resistor unit, the third resistor unit, and the fifth resistor unit a second resistor unit, the fourth resistor unit, and the sixth resistor are arranged in a y direction perpendicular to the x direction and the z direction via an interval longer than the third distance longer than the second distance. The cells are arranged side by side in the y direction at intervals of the third distance or more. The load tester according to claim 2, wherein the first base portion and the second base portion are integrally formed; and the third base portion is integrated with the fourth base portion; the fifth base The table portion is integrated with the sixth base portion. The load tester of claim 2, wherein the resistor is a rod resistor extending in the y direction, the resistor group being constituted by the resistors being arranged side by side in the x direction; The first base portion, the third base portion, the second base portion, the fourth base portion, the third base portion, the fifth base portion, and the fourth base portion An interval adjusting member is disposed between the sixth base portions; the width of the interval adjusting member in the y direction is longer than the second distance; and the third distance is twice the first distance and the interval is adjusted The sum of the widths of the members in the y direction; the amount by which the terminals of the resistor protrude from the frame covering the side of the resistor group is shorter than the first distance. The load tester of claim 2, further comprising a connection cable or a shorting bar; the connection cable or the shorting bar is used to separate the second distance or more in the x direction a resistor group of two adjacent resistor units, that is, a connection member that is connected in series between the resistor groups adjacent in the x direction, and can be connected in series at two or more positions; the insulator has a When the power supply load test is performed on the resistance cell group in which the resistor groups of the two resistor units adjacent to each other in the x direction are connected in series at intervals of the second distance or more, the magnitude corresponding to the rated voltage of the power source to be tested . The load tester of claim 5, wherein the connection cable or the shorting bar is connected to the resistor group through a fixed contact, a movable contact, and a driving member for driving the movable contact And the switch member including the housing filled with the inert gas is performed. The load tester of claim 5, wherein three connection switching sections are provided, the connection switching section includes: a body section; and a switch section for controlling the load resistance test among the plurality of resistor groups a resistor group; and a first bus bar connected to one of a terminal of the switch portion and a power supply line of a test object power source from the load test; wherein a resistor of one of the resistor groups is One of the main portions is connected to the other terminal of the switch portion; and the main portion has a first surface on which the switch portion is attached, and a first busbar that is perpendicular to the first surface and that is connected to the first busbar through the insulator at regular intervals The two connection switching units are disposed in a detachable state in such a manner that the switch portion is disposed between the terminal of the resistor connected to the switch portion and the first bus bar. The first resistance unit, the third resistance unit, and the fifth resistance unit. The load tester according to the second aspect of the invention, wherein the first cooling fan to the sixth cooling fan and the first resistance unit to the sixth resistance unit are provided with the first cooling fan The cooling air of the sixth cooling fan is guided to the cylindrical ventilating cover of the first resistor unit to the sixth resistor unit; the upper portion of the tubular hood is located inside the frame covering the side surface of the resistor group, The frame body is separated by a distance of 10 mm or more. The load tester according to claim 1, wherein the resistor unit includes a first resistor unit and a second resistor unit; the cooling fan includes a first cooling fan and a second cooling fan; and the base portion includes a first base a first base unit, wherein the first cooling fan is disposed, and the first resistor unit is mounted on the upper portion; the second base unit is provided with the second cooling fan, and The second resistor unit is mounted on an upper portion of the second base portion, and the first resistor unit and the second resistor unit are arranged in the x direction perpendicular to the z direction at intervals of the second distance or more. A load testing machine, characterized in that: two or more resistor units are provided, each resistor unit comprises: a plurality of resistor groups arranged side by side, each resistor group is composed of side-by-side resistors; and a frame body made of an insulating material a side surface of the resistor group is formed and covered; a cooling unit having a cooling fan is provided therein, and two or more individual members are provided, and the cooling unit is provided with at least one or more resistor units via an insulator; Among the frames, at least a surface located in a positional relationship with respect to the other resistance units is disposed at a first inner distance from a side surface of the cooling unit to which the resistance unit is mounted; the two or more resistance units are In order to achieve insulation between adjacent resistor units, the spacing between the adjacent resistor units is parallel to the second distance; the second distance is twice the first distance, and the first distance is 45mm or more. The load tester according to claim 10, wherein the resistor unit includes a first resistor unit and a second resistor unit; the cooling fan includes a first cooling fan and a second cooling fan; and the cooling unit includes a first cooling unit And a second cooling unit; the first cooling unit is provided with the first cooling fan, and the first resistor unit is mounted; the second cooling unit is provided with the second cooling fan, and the second resistor is mounted The first resistor unit and the second resistor unit are arranged side by side at intervals of the second distance. The load tester of claim 10, wherein the cooling fan exhausts air in a horizontal direction; the resistor unit has an air inlet opening in a horizontal direction and an air outlet opening in a horizontal direction; The air guide duct is disposed downstream of the resistor unit, and has an air inlet opening that opens in the horizontal direction and an air outlet that opens in the vertical direction and exhausts upward.