TWI658280B - Load testing machine - Google Patents

Abstract

The invention provides a load tester, which is composed of a plurality of resistance units and is easy to carry or install. In the load testing machine of the present invention, the resistor groups are arranged side by side in the horizontal direction, and a plurality of sections are arranged side by side in the vertical direction (that is, the z direction); a frame made of an insulating material and covering the side of the resistor group is included. There are two or more resistance units inside the body; a base part with a cooling fan is built up to form an independent individual, and two or more are installed; each base part has at least one resistance unit installed on the upper part via an insulator. ; The frame is located at least on the surface that is in a positional relationship with each other resistance unit, and is arranged at a first inner distance from the side of the base portion where the resistance unit is installed when viewed from above; 2 or more For the insulation between adjacent resistance units, the resistance units are arranged side by side so that the intervals between the frames of adjacent resistance units are above the second distance; the second distance is twice the first distance, and the first distance is 45 mm or more .

Description

Load tester

The present invention relates to a load tester used for an electrical load test of a power source such as an alternator.

I have proposed a dry load tester using resistor units with multiple resistors side by side. [Prior Art Literature] [Patent Literature]

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

[Problems to be solved by the invention]

When the voltage of the power source of the load test object is very large, a large load tester with a plurality of resistance units side by side is required. In a large-scale load tester, since a plurality of resistance units are mounted on the upper part of the base part to form an integrated structure, it is necessary to carry the resistance unit and the base part assembled together. Space handling has its difficulties.

Therefore, an object of the present invention is to provide a load tester which is composed of a plurality of resistance units and is easy to carry or install. [Means to solve the problem]

In the load testing machine of the present invention, the resistor groups are arranged side by side in the horizontal direction, and a plurality of sections are arranged side by side in the vertical direction (that is, the z direction); a frame made of an insulating material and covering the side of the resistor group is included. There are two or more resistance units inside the body; a base part with a cooling fan is built up to form an independent individual, and two or more are installed; each base part has at least one resistance unit installed on the upper part via an insulator. ; The frame is located at least on the surface that is in a positional relationship with each other resistance unit, and is arranged at a first inner distance from the side of the base portion where the resistance unit is installed when viewed from above; 2 or more For the insulation between adjacent resistance units, the resistance units are arranged side by side so that the intervals between the frames of adjacent resistance units are above the second distance; the second distance is twice the first distance, and the first distance is 45 mm or more .

The abutment section is separate from other abutment sections and constitutes an independent individual. Therefore, each abutment section can be transported in a state where the resistance unit and the cooling fan are mounted on the abutment section and are not connected to other abutment sections. . Therefore, as long as the overall dimensions (width, height, and depth) of one abutment section and the resistance unit are smaller than the width, height, and depth of the entrance and exit of an elevator, such as an elevator, the elevator can be used to carry one abutment section, Combination of resistance unit and cooling fan.

Considering the positional relationship with other abutment sections and the connection of cables between resistor units, it is necessary to carry out after moving in, but rather than wiring the resistor unit and cooling fan to the abutment section or the inside of the resistor unit In terms of work, since it is relatively easy to work, it can be easily performed at a place where a load tester is installed.

In addition, since the frame of each resistance unit is disposed more inward than the base portion, even if the base portions are disposed in contact with each other, the resistance units will not contact each other and will maintain a distance of more than 2 Interval. Therefore, even if each base part constitutes an independent individual, it can be easily installed while maintaining the 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 two adjacent resistance units, insulation between the two resistance units can be maintained.

Preferably, as the resistance unit, there are a first resistance unit to a sixth resistance unit; as a cooling fan, there is a first cooling fan to a sixth cooling fan; and as a base section, there is a first base section to a first 6 abutment section; the first abutment section has a first cooling fan inside, and the first resistance unit is installed through the insulator on the upper part; the second abutment section has a second cooling fan inside, and is installed on the upper side through the insulator. The second resistance unit; the third base unit is provided with a third cooling fan, and the third resistance unit is installed through the insulator on the upper side; the fourth base unit is provided with the fourth cooling fan, and is installed on the upper side through the insulator. The fourth resistance unit; the fifth base unit is provided with a fifth cooling fan, and the fifth resistance unit is installed through the insulator; the sixth base unit is provided with the sixth cooling fan, and is installed above the insulator. 6th resistance unit; each of the 1st, 3rd, and 5th abutment sections constitutes an independent individual; the 2nd, 4th, and 6th abutment sections each constitute an independent individual Individuals; the first resistance unit and the second resistance unit are separated by a distance greater than a second distance, Side by side in the x direction perpendicular to the z direction; the third and fourth resistor units are side by side in the x direction at intervals of a second distance or more; the fifth and sixth resistor units are at a second distance across The above intervals are 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 at intervals of a third distance or longer than the second distance. Side by side in the y direction; the second resistance unit, the fourth resistance unit, and the sixth resistance unit are side by side in the y direction with an interval of at least a third distance.

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

When the lift has a size capable of simultaneously loading two abutment portions, that is, when the combination of the two sets of abutment portions, the resistance unit, and the cooling fan are adjacent in the x direction (width, height, and depth), When the width, height, and depth of the entrance and exit of the elevator are respectively smaller, two abutment portions (eg, the first abutment portion and the second abutment portion) adjacent to each other in the x direction may be connected together, and in this state, It is loaded on a lift.

In addition, a preferred aspect is that the resistor group is composed of a plurality of rod-shaped resistors extending in the y direction in the x direction; the first base part, the third base part, and the second base Interval adjustment members are provided between the base section and the fourth base section, the third base section and the fifth base section, the fourth base section and the sixth base section; the width in the y direction of the gap adjustment member, It is longer than the second distance; the third distance is twice the first distance and the width in the y direction of the interval adjusting member; the amount of protrusion of the resistor terminal from the frame covering the side of the resistor group is smaller than The first distance is shorter.

In addition, since the terminals of the resistor protrude from the frame covering the side of the resistor group in the y direction, the distance between the front ends of the terminals is shorter than the third distance, but because it is longer than the second distance Since a longer width adjustment member is provided between them, the distance between the front ends of the terminals is longer than the second distance, and the insulation formed by the isolation can be maintained.

In addition, a preferable aspect is to further include a connecting cable or a shorting rod; the connecting cable or a shorting rod is used to connect the resistance of two resistance units adjacent to each other in the x direction at intervals of a second distance or more The resistor group, that is, the connecting members connected in series between two or more resistor groups adjacent in the x direction, can be attached and detached in two or more places; the insulator has a second distance or more in the x direction when used When the resistor group of two resistor units adjacent to each other is connected in series to perform a power load test, it corresponds to the rated voltage of the power source to be tested.

A more preferable aspect is that the connection cable or the shorting rod is connected to the resistor group through a fixed member, a movable contact, and a driving member for driving the movable contact, and a housing filled with an inert gas. It is carried out by the internal switching means.

In addition, a preferred aspect is that three connection switching sections are provided, the connection switching sections having: a body section; a switch section for controlling a resistor group for load testing among the plurality of resistor groups; and The first bus is connected to one of the terminals of the switch unit and one of the power cords of the power source of the test object of the load test; one of the terminals of one resistor of the resistor group is connected to the other of the switch unit Terminal connection; the main body part has a first surface on which the switch part is installed, and a second surface on which the first bus bar is installed at a certain interval through the insulator perpendicular to the first surface; and three connection switching parts for the switch part The first resistor unit, the third resistor unit, and the fifth resistor unit are detachably mounted between terminals of the resistor connected with the cable and the switch unit and the first bus bar.

The connection switching unit including the first bus bar and the switch unit can efficiently perform the wiring work of the components constituting the load tester. In particular, since the switch portion is disposed between the resistor terminal and the first bus bar, a short connecting member (cable, etc.) can be used to connect the resistor to the switch portion, and the switch portion to the first bus bar.

In a preferred aspect, cooling air from the first cooling fan to the sixth cooling fan is provided between the first cooling fan to the sixth cooling fan and the first resistance unit to the sixth resistance unit. The cylindrical ventilation hoods of the first resistance unit to the sixth resistance unit; the upper part of the cylindrical ventilation hood is located inside the casing covering the side of the resistor group, and is separated from the casing by a distance of 10 mm or more.

In a preferred aspect, 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 unit includes a first base unit. And the second base part; the first base part includes a first cooling fan and a first resistance unit is installed on the upper part; the second base part includes the second cooling fan and a second resistance unit is installed on the upper part ; The first resistance unit and the second resistance unit are arranged side by side in the x direction perpendicular to the z direction with a gap of at least a second distance.

In the load tester of the present invention, a resistor group composed of resistors side by side is arranged in a plurality of rows; two resistor units including a frame made of an insulating material and covering the sides of the resistor group are provided. Above; the cooling section of the cooling fan is built in to form an independent individual and two or more are installed; each cooling section is installed with at least one resistance unit through an insulator; the frame is located at least with other resistors The faces of the positional relationship of the units facing each other are arranged at a first inner distance from the side of the cooling part where the resistor unit is installed; for two or more resistor units, for the insulation between adjacent resistor units, Adjacent resistor units are arranged side by side so that the intervals between the frames are greater than or equal to the second distance. The second distance is twice the first distance, and the first distance is 45 mm or more.

Preferably, the resistance unit includes a first resistance unit and a second resistance 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 a first cooling fan and a first resistance unit is installed; the second cooling unit is provided with a second cooling fan and a second resistance unit is installed; the first resistance unit and the first The two resistance units are arranged side by side with an interval of at least a second distance.

In addition, a preferred aspect is that the cooling fan exhausts air in a horizontal direction; the resistance unit has an air inlet opening in the horizontal direction and an air outlet opening in the horizontal direction; and is further provided downstream of the resistance unit, It has an air inlet opening in a horizontal direction and an air outlet opening in a vertical direction, and an air guide duct exhausting upward. [Effect of the invention]

As described above, according to the present invention, it is possible to provide a load tester composed of a plurality of resistance units and easy to carry or install.

Hereinafter, this embodiment will be described using drawings. The dry load tester 1 according to this embodiment includes: a first base section 11 to a sixth base section 16, a gap adjusting member 20, a first resistance unit 21 to a sixth resistance unit 26, and a first cooling fan 31 to The sixth cooling fan 36, the power connection portion 40, the insulator 50, and the connection cable 60 (FIGS. 1 to 13).

First, the structure of each part will be described, and the wiring between the power connection section 40 and each resistance unit will be described after the structure of each part is described (see FIGS. 14 to 24). Therefore, in FIGS. 1 to 13, members related to wiring such as the connection switching section 70 are omitted.

The first abutment portion 11 has a substantially rectangular parallelepiped shape. A first cooling fan 31 is provided in an upper portion of the first abutment portion 11, and a first side portion or a bottom surface of the lower portion in the first abutment portion 11 is provided. The air inlet of the 1 cooling fan 31 is provided with an air outlet of the first cooling fan 31 on the top surface. The first resistance unit 21 is fixed to an upper portion of the first base portion 11 via an insulator 50.

The second abutment portion 12 has a substantially rectangular parallelepiped shape. A second cooling fan 32 is provided at an upper portion in the second abutment portion 12. A second side or bottom surface of the lower portion in the second abutment portion 12 is provided with a second cooling fan 32. An air inlet of the 2 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 an upper portion of the second base portion 12 via an insulator 50.

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

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

The fifth base portion 15 has a substantially rectangular parallelepiped shape. A fifth cooling fan 35 is provided on the upper portion of the fifth base portion 15. A fifth side or bottom surface of the lower portion inside the fifth base portion 15 is provided. An air inlet of the 5 cooling fan 35 is provided with an exhaust port of the fifth cooling fan 35 on the top surface. The fifth resistance unit 25 is fixed to an upper portion of the fifth base portion 15 via an insulator 50.

The sixth base portion 16 has a substantially rectangular parallelepiped shape. A sixth cooling fan 36 is provided in the upper portion of the sixth base portion 16, and a side or bottom surface of the lower portion in the sixth base portion 16 is provided. An air inlet of the 6 cooling fan 36 is provided with an air outlet of the sixth cooling fan 36 on the top surface. The sixth resistance unit 26 is fixed to an upper portion of the sixth base portion 16 via an insulator 50.

In addition, a configuration may be adopted in which a substrate, a shock-proof insulating rubber, or the like (not shown) is provided between the insulator 50 and each base portion.

In the embodiment shown in FIGS. 1 to 24, the horizontal direction in which the first abutment portion 11 and the second abutment portion 12 are arranged side by side is the x direction, and the first abutment portion 11, the third abutment portion 13, and the first 5 The horizontal direction in which the base portions 15 are juxtaposed is the y direction, and the vertical direction perpendicular to the y direction and the x direction is the z direction.

In addition, the side on which the first resistance unit 21 and the second resistance unit 22 are provided is the front, and the side on which the power supply connection portion 40 is provided is the rear. For example, the back surface of the first frame 21a of the first resistance unit 21 and the front surface of the third frame 23a of the third resistance unit 23 face each other, and one of the side surfaces of the first frame 21a of the first resistance unit 21 is opposite to the first The other sides of the second frame 22a of the two resistance units 22 face each other.

The first abutment portion 11 and the second abutment portion 12 are provided in a state where they are adjacent to each other without a gap in the x direction. The third base portion 13 and the fourth base portion 14 are provided in a state where 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 where they are adjacent to each other without a gap in the x direction.

The first abutment portion 11, the third abutment portion 13, and the fifth abutment portion 15 are provided in a state in which the interval adjusting member 20 is interposed therebetween and aligned side by side in the y direction. The second base part 12, the fourth base part 14, and the sixth base part 16 are provided in a state where they are arranged side by side with the gap adjusting member 20 interposed therebetween.

The interval adjusting member 20 has a substantially rectangular parallelepiped shape with a width w1 in the y direction, and is arranged between the abutment portions to provide isolation between the abutment portions by a width w1 or more. The width w1 of the interval adjusting member 20 is longer (for example, 510 mm) than a second distance d2 described later.

In addition, it may be configured 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 between the fifth base portion 15 and the sixth base portion. Between 16, members such as the interval adjusting member 20 are also sandwiched, and the respective abutment portions are arranged at intervals. In this case, it is easier to move between the first abutment portion 11 and the second abutment portion 12, the third abutment portion 13 and the fourth abutment portion 14, and the fifth abutment portion 15 and the sixth abutment portion. A wiring space such as a cable is provided between the sections 16.

Each of the first resistance unit 21 to the sixth resistance unit 26 is a rod-shaped resistor R parallel to the y-direction, and a plurality of resistors connected in series in the x-direction are arranged at predetermined intervals in the x-direction in the z-direction. A plurality of resistors connected in parallel and connected in parallel, and including a frame (first frame 21a to sixth frame 26a) made of insulating material and covering the side of the resistor group, for switching the used resistor Group to change the load condition of the test target power supply such as a generator to perform a load test of the test target power supply.

In the embodiment shown in FIG. 1 to FIG. 24, each of the first resistance unit 21 to the sixth resistance unit 26 is described, and a rod-shaped resistor R parallel to the y direction is interposed in the x direction. 8 resistors connected in series at a predetermined interval and connected in series using short-circuit bars and other resistor units in parallel in the z direction with 8 segments in parallel, but the number of resistors R in each resistor group, or resistor group The number of stacked segments is not limited to this.

The first resistance unit 21 includes the eleventh resistor group R11 to the eighteenth resistor group R18 from the upper stage; the second resistance unit 22 includes the 21st resistor group R21 to the 28th resistor group R28 from the upper stage; the third The resistance unit 23 has the 31st resistor group R31 to 38th resistor group R38 from the upper stage; the fourth resistance unit 24 has the 41st resistor group R41 to 48th resistor group R48 from the upper stage; the fifth resistance unit 25. The 51st resistor group R51 to the 58th resistor group R58 are provided from the upper stage; the 6th resistor unit 26 has the 61st resistor group R61 to the 68th resistor group R68 from the upper stage.

Each resistor group is covered by a frame (the first frame 21a to the sixth frame 26a) on its side. In order to allow the cooling air from the cooling fan provided at the lower portion to flow to the upper portion, the resistor groups are opened on the top and bottom surfaces, and The insulation properties of adjacent resistance units are improved, and they are made of an insulating material. The two terminals of each resistor R are held by the front portion and the back portion of the frame.

The first housing 21a covering the side of the resistor group (the eleventh resistor group R11 to the eighteenth resistor group R18) with the first resistor unit 21 is located at least with other resistor units (the second resistor unit 22). The surface that is in a positional relationship with the third resistance unit 23) is disposed so that it is located at a first inner distance d1 (45 mm or more) from the side of the first base portion 11 (in the horizontal direction) when viewed from above. The size and positional relationship between the first base portion 11 and the first resistance unit 21 is determined.

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

The third frame 23a covering the side of the resistor group (31st resistor group R31 to 38th resistor group R38) with the third resistance unit 23 is located at least with other resistance units (the first resistance unit 21). 4, the fourth resistance unit 24 and the fifth resistance unit 25) are disposed on the surfaces facing each other in a positional relationship, and are arranged at a first distance d1 from the inside of the third base portion 13 (in the horizontal direction) when viewed from above. The method determines the size and positional relationship between the third base portion 13 and the third resistance unit 23.

The fourth frame 24a covering the side of the resistor group (41th resistor group R41 to 48th resistor group R48) with the fourth resistance unit 24 is located at least with other resistance units (the second resistance unit 22). 3rd resistance unit 23 and 6th resistance unit 26) The surfaces facing each other in a positional relationship are disposed on the inner side at a first distance d1 from the side (in the horizontal direction) of the fourth base portion 14 when viewed from above. The method determines the size and positional relationship between the fourth base portion 14 and the fourth resistance unit 24.

The fifth frame 25a covering the side of the resistor group (51st resistor group R51 to 58th resistor group R58) with the fifth resistance unit 25 is located at least with other resistance units (the third resistance unit 23 The surface in a positional relationship with the sixth resistance unit 26) is arranged on the inner first distance d1 from the side (in the horizontal direction) of the fifth base portion 15 when viewed from above, and the fifth base is determined. The size and positional relationship between the stage portion 15 and the fifth resistance unit 25.

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

The terminals of the resistor R of the first resistance unit 21 to the sixth resistance unit 26 protrude in the y direction from the frames (the first frame 21a to the sixth frame 26a) covering the side of the resistor group of each resistance unit. The size of the first resistance unit 21 to the sixth resistance unit is determined such that the protrusion amount is shorter than the first distance d1.

In addition, in the first frame body 21a to the sixth frame body 26a, the surfaces which are not located in a positional relationship opposite to each other resistance unit may be arranged so as to be viewed from above than the first base section 11 to the first The aspect in which the side surfaces of the 6 abutment portions 16 are further inside the first distance d1. In this case, the materials of the resistance 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 connected in series constituting the resistor group among the first resistance unit 21, the third resistance unit 23, and the fifth resistance unit 25 (the side that is not connected to a connection cable 60 described later) ) And is connected to the power source connection portion 40 through a connection switching portion 70 described later. At least one of the terminals of the resistor R connected in series and constituting the resistor group of the second resistance unit 22, the fourth resistance unit 24, and the sixth resistance unit 26 (the side that is not connected to a connection cable 60 described later) ), In order to form a neutral point connection, but connected to each other.

In order to efficiently perform cooling of the cooling fan, resistors adjacent to each other in the z direction are arranged in the middle of the resistor R constituting the resistor group and the resistor R adjacent to the resistor R in the x direction. The arrangement of the resistors R of the resistor groups is such that the resistors R of the respective resistor groups are arranged. The resistor R in the uppermost stage is illustrated in FIGS. 1 and 2, and the pattern of the resistor R in the second and lower stages 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 of at least a third distance d3. The second resistance unit 22, the fourth resistance unit 24, and the sixth resistance unit 26. Side by side in the y direction with an interval greater than or equal to the third distance d3. The third distance d3 has a length that is longer than the resistance units adjacent to each other in the y direction (for example, the first resistance unit 21 and the third resistance unit 23) can be insulated by isolation, and the operator can enter the base. The length to which wiring and other operations are performed between the table portions (or between the resistance units) (for example, the third distance d3 between the resistance units: 600 mm, and the width between the base portions w1: 510 mm).

The first resistance unit 21 and the second resistance unit 22 are arranged side by side in the x direction with an interval of at least a second distance d2, and the third resistance unit 23 and the fourth resistance unit 24 are at an interval of at least a second distance d2. The fifth resistance unit 25 and the sixth resistance unit 26 are arranged side by side in the x direction, with the second distance d2 or more spaced apart from each other. The second distance d2 has a length (for example, 90 mm) to which the resistance units (for example, the first resistance unit 21 and the second resistance unit 22) adjacent to each other in the x direction 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 the two times 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 in the x direction without a gap, the first resistance unit 21 and the second resistance unit 22 are formed at least with a second distance d2 therebetween. The positional relationship (twice the first distance d1, that is, 90 mm or more) can maintain the first resistance unit 21 and the second resistance even when a high voltage of 6600V is applied to the first resistance unit 21 and the second resistance unit 22, respectively. Insulation between the 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 resistance unit 23 and the fourth resistance unit 24 are formed at least with a second distance d2 therebetween. The positional relationship (twice the first distance d1, that is, 90 mm or more) can maintain the third resistance unit 23 and the fourth resistance even when a high voltage of 6600V is applied to the third resistance unit 23 and the fourth resistance unit 24, respectively. Insulation between units 24.

Even when the fifth base portion 15 and the sixth base portion 16 are adjacent to each other in the x direction without a gap, the fifth resistance unit 25 and the sixth resistance unit 26 still form at least a second distance d2. (2 times the first distance d1, that is, 90 mm or more), even if a high voltage of 6600V is applied to 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 with no gap in the y direction via the gap adjusting member 20, the first resistance unit 21 and the third resistance unit 23 still form at least a gap. The positional relationship of the third distance d3 (twice of the first distance d1 and the width w1 of the interval adjusting member 20, that is, 600 mm or more), even if a 6600V is applied to the first resistance unit 21 and the third resistance unit 23, respectively High voltage can also maintain the insulation between the first resistance unit 21 and the third resistance unit 23.

In addition, since the terminals of the resistor R protrude in the y direction from the frames (the first frame 21a and the third frame 23a) covering the side of the resistor group of the first resistance unit 21 and the third resistance unit 23, The distance between the front ends of the terminals is shorter than the third distance d3. However, since the interval adjusting member 20 having a width w1 longer than the second distance d2 is provided therebetween, the distance between the front ends of the terminals is , Will be longer than the second distance d2, and the insulation formed by isolation can be maintained.

Even when the third base part 13 and the fifth base part 15 are arranged side by side with no gap in the y direction via the gap adjusting member 20, the third resistance unit 23 and the fifth resistance unit 25 still form at least a gap. The positional relationship of the third distance d3 (twice of the first distance d1 and the width w1 of the interval adjusting member 20, that is, 600 mm or more), even if a 6600V is applied to the third resistance unit 23 and the fifth resistance unit 25, respectively High voltage can also maintain insulation between the third resistance unit 23 and the fifth resistance unit 25.

The terminals of the resistor R protrude in the y direction from the frames (the third frame 23a and the fifth frame 25a) covering the sides of the resistor group of the third resistance unit 23 and the fifth resistance unit 25. The distance between the front ends of the terminals is shorter than the third distance d3. However, since the interval adjusting member 20 having a width w1 longer than the second distance d2 is provided therebetween, the distance between the front ends of the terminals is , Will be longer than the second distance d2, and the insulation formed by isolation can be maintained.

Even when the second base portion 12 and the fourth base portion 14 are arranged side by side with no gap in the y direction via the gap adjusting member 20, the second resistance unit 22 and the fourth resistance unit 24 still form at least a gap. The positional relationship of the third distance d3 (twice of the first distance d1 and the width w1 of the interval adjusting member 20, that is, 600 mm or more), even if a 6600V is applied to the second resistance unit 22 and the fourth resistance unit 24, respectively. High voltage can also maintain the insulation between the second resistance unit 22 and the fourth resistance unit 24.

In addition, since the terminals of the resistor R protrude in the y direction from the frames (the second frame 22a and the fourth frame 24a) covering the sides of the resistor group of the second resistance unit 22 and the fourth resistance unit 24, The distance between the front ends of the terminals is shorter than the third distance d3. However, since the interval adjusting member 20 having a width w1 longer than the second distance d2 is provided therebetween, the distance between the front ends of the terminals is , Will be longer than the second distance d2, and the insulation formed by isolation can be maintained.

Even when the fourth base portion 14 and the sixth base portion 16 are arranged side by side with no gap in the y direction via the gap adjusting member 20, the fourth resistance unit 24 and the sixth resistance unit 26 still form at least a gap. The positional relationship of the third distance d3 (twice of the first distance d1 and the width w1 of the interval adjusting member 20, that is, 600 mm or more), even if a 6600V is applied to the fourth resistance unit 24 and the sixth resistance unit 26, respectively. High voltage can also maintain insulation between the fourth resistance unit 24 and the sixth resistance unit 26.

The terminals of the resistor R protrude in the y direction from the frames (the fourth frame 24a and the sixth frame 26a) covering the sides of the resistor group of the fourth and sixth resistor units 24 and 26. The distance between the front ends of the terminals is shorter than the third distance d3. However, since the interval adjusting member 20 having a width w1 longer than the second distance d2 is provided therebetween, the distance between the front ends of the terminals is , Will be longer than the second distance d2, and the insulation formed by isolation can be maintained.

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

Between the first cooling fan 31 to the sixth cooling fan 36 and the first resistance unit 21 to the sixth resistance unit 26, cooling air from the first cooling fan 31 to the sixth cooling fan 36 is provided to the first resistor. The cylindrical ventilation hoods (the first ventilation hood 31 a to the sixth ventilation hood 36 a) of the units 21 to the sixth resistance unit 26 (see dotted lines in FIGS. 1 and 2). The upper part of the cylindrical ventilation hood should be located inside the frame (the first frame 21a to the sixth frame 26a) covering the side of the lowermost resistor group, and separated from the frame by more than 10mm. . Both the hood and the frame are made of insulating material, and by providing isolation, dust and the like will not be accumulated between them to maintain insulation.

The first resistance unit 21 to the sixth resistance unit 26 each have a specification (the number of resistors R or Resistance 値, etc.).

For example, the first resistance unit 21 to the sixth resistance unit 26 each have three resistance units among the first resistance unit 21 to the sixth resistance unit 26 to perform a load test with a three-phase AC power source. Specifications corresponding to the rated voltage (number of resistors R, resistance 値, etc.).

Each of the first cooling fan 31 to the sixth cooling fan 36 has a specification (the cooling capacity of the fan, etc.) for cooling the first resistance unit 21 to the sixth resistance unit 26 during a power load test.

The power 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 power source of the test object is performed through the vacuum circuit breaker 41. The operation unit is used to select the number of resistor groups connected to the power source to be tested, change the load, and perform a power-on / off operation of the load tester 1 or a power-on / off operation of the first cooling fan 31 to the sixth cooling fan 36. In response to the operation state of the load in the operation section, the control device 43 performs on-off control of the switching devices (the first switch section SW1 to the eighth switch section SW8) of the connection switching section 70 described later, thereby implementing the used Switching of resistor groups.

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

In addition, for purposes such as insulation between 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 resistance unit 25 and the sixth resistance unit 26 (see FIGS. 2 and 5).

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

That is, the insulator 50 has a specification corresponding to twice the rated voltage of the test target power source corresponding to each of the specifications of the first resistance unit 21 to the sixth resistance unit 26 or the first cooling fan 31 to the sixth cooling fan 36.

For example, when each of the first resistance unit 21 to the sixth resistance unit 26 has a specification corresponding to a three-phase AC power supply of 6600V, an insulator 50 having a specification corresponding to a three-phase AC power supply of 13,200V is used. In this case, the insulator 50 is a length that is several centimeters longer than an insulator having a specification corresponding to a 6600V three-phase AC power source.

The connecting cable 60 is a resistor group for two resistor units adjacent to each other in the x direction with a second distance d2 apart, that is, a resistor group (resistor R adjacent to the resistor group in the x direction) ), Cables connected in series so that they can be attached and detached at two (or more) places.

Connect the cable 60 to prepare three times the number of resistor groups in the resistor unit (8 segments × 3 = 24 in this embodiment), and connect each cable 60 to form the resistance of the resistor group. One of the terminals of the resistor R near the connection target resistance unit, and the terminal of the resistor R forming the resistor group of the resistor group of the connection target resistance unit adjacent to the terminal in the x direction. connection.

This embodiment is an embodiment in which the connection cable 60 is used to connect each section of the resistor group, but it is not limited to the mode in which each section is connected, and it may be at least two places in the plurality of resistor groups. As described above, the connection is performed by the connection cable 60. The connection at one location (one of the terminals of one resistor R) can make switching control of the resistor group easier during a load test than when two resistor units are connected in series. However, there are many connections and switching control is easier.

Ring terminals (indicated by black dots in FIG. 3 or FIG. 4) are provided at both terminals of the connection cable 60, and the ring terminals are hung on the terminals of the resistor R and locked with screws (or Bolts), the resistor R can be connected to the connection cable 60 in a removable state.

The resistor groups of the two resistance units, that is, the resistor groups adjacent to each other in the x direction are connected in series using the connection cable 60.

At this time, one resistance unit group has twice the resistance of one resistance unit, and one resistance unit group can be used for a load test of a power supply that is twice the voltage of the test target power supply for a load test performed with one resistance unit. Implemented.

For example, when the first resistance unit 21 to the sixth resistance unit 26 each have a specification corresponding to a three-phase AC power supply of 6600V, by setting them into three resistance unit groups, a 13200V three-phase AC power supply can be implemented. Load test.

The voltage applied to one resistance cell group is twice the voltage applied to one resistance cell group. The insulator 50 uses a specification that takes into account the voltage applied to one resistance cell group. This double voltage can be sufficiently isolated to maintain insulation from peripheral devices such as the first base section 11 to the sixth base section 16 or the first cooling fan 31 to the sixth cooling fan 36, or Insulation from the resistance unit.

The connection cable 60 is connected to each resistor group, and the connection at one point (one terminal of one resistor R) can make the resistance during load test more than when connecting two resistance units. Switching control of the cluster is simpler.

The first resistance unit 21 to the sixth resistance unit 26, or the first cooling fan 31 to the sixth cooling fan 36 are preferably members that take into consideration the voltage of the power source of the test object for the load test performed by one resistance unit. Therefore, rather than increase the number or length of the resistors R to obtain the same specifications as one resistor unit group in one resistor unit, we can use existing products to more easily achieve this mode.

In addition, I 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 use only the second resistance unit 22, the first The 4 resistance unit 24 and the 6 resistance unit 26) can perform a load test for a lower voltage power source than a load test using the connection cable 60.

By providing the isolation of the second distance d2 or more, the insulation between the resistance units arranged side by side in the x direction becomes higher than in the case where such 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 in the case where such isolation is not provided, and there is also an operator's The advantage is that it is easy to enter and perform operations such as wiring (especially attaching and detaching the connection cable 60) between the resistance units.

Since the resistor R of each resistance unit is arranged to extend in the y direction, the terminal protrudes from the housing in the y direction (protrudes from a surface of the housing perpendicular to the y direction). Therefore, terminals are not provided on the surface perpendicular to the x direction in the frame of each resistance unit, and there is less opportunity for an operator to enter 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 a distance (second distance d2) between the resistance units for minimum insulation. However, as described above, in order to provide a wiring space such as a cable, a configuration may be adopted in which the base portion is arranged so that the resistance units are spaced apart from each other longer than the second distance d2.

The first abutment portion 11 to the sixth abutment portion 16 each constitute an independent individual, and a resistance unit or a cooling fan is mounted on the abutment portion, and can be connected to other abutment portions. , Transport each abutment section. Therefore, if the overall dimensions (width, height, and depth) of one abutment section and the resistance unit are smaller than the width, height, and depth of the entrance and exit of an elevator, such as an elevator, the elevator can be used to carry one abutment section, Combination of resistance unit and cooling fan.

It is necessary to take the first to eighth steps described later in consideration of the positional relationship with other base sections, the cable connection between the resistance units, or the connection between the power supply connection section 40 and other devices such as the first resistance unit 21. It is performed after carrying in, but it is easier to perform the work than fixing the resistance unit or the cooling fan to the base part or the wiring inside the resistance unit, and it can be easily performed at the place where the load tester 1 is installed.

In addition, since the frame of each resistance unit is disposed more inward than the base portion, even if the base portions are disposed in contact with each other, the resistance units will not contact each other and will maintain a second distance. interval above d2. Therefore, even if each base part constitutes an independent individual, it can be easily installed while maintaining the insulation between the resistance units.

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

When the lift has a size that can simultaneously load two abutment sections, that is, the overall dimensions (width, height, depth) when the combination of two sets of abutment sections, resistance units, and cooling fans are adjacent in the x direction, respectively When the width, height, and depth of the entrance and exit of the elevator are smaller, two abutment portions (for example, the first abutment portion 11 and the second abutment portion 12) adjacent to each other in the x direction may be connected to each other, and a connection cable 60 may be used. The resistance units mounted on the base part are connected to each other, and the resistance units are mounted on an elevator.

At this time, 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. (See Figure 7). FIG. 7 shows that the seventh abutment portion 17 is an integrated abutment portion including the first abutment portion 11 and the second abutment portion 12, and the eighth abutment portion 18 includes a third abutment portion 13 and The integrated base portion including the fourth base portion 14 and the ninth base portion 19 are examples of the integrated base portion including the fifth base portion 15 and the sixth base portion 16.

This embodiment is a description that the resistors R in the resistor group are connected in series. However, it is also possible to change the connection method between the terminal of the resistor R and the terminal of another resistor R, and connect some or all of them in parallel. . Therefore, it is also possible to switch the connection method of the resistors R in the resistor group to a series or parallel state by using a shorting bar through a switching member. At this time, by making more parallel connections in the resistor group, it is possible to support the load test of the low-voltage three-phase AC power supply.

In addition, a description is given of a state in which a resistor group of a resistance unit is connected to a resistor group of another resistance unit using a connection cable 60, but the connection member between the resistor groups is not limited to a cable. For example, a configuration in which a resistor group is connected to another resistor group using a short-circuit bar 61 may be configured in the same manner as a short-circuit bar between terminals connecting the resistor R (see FIG. 8).

In addition, the aspect of the present embodiment is a description of the direct connection between the connection cable 60 or the shorting bar 61 and the resistor R, but it can also be constituted by a built-in fixed contact 81, a movable contact 83, and a drive movable The state of the switch member 80 including the driving member 85 of the contact 83 and the case 87 filled with an inert gas such as nitrogen (see FIGS. 9 to 12).

Specifically, the switch member 80 includes a fixed contact 81, a movable contact 83, a driving member 85, a lead 86, and a case 87, and is provided in a resistor group and is connected to a connection cable 60 or a shorting bar 61. Near the terminals of R.

A terminal (first terminal 81a) protruding from one of the fixed contacts 81 of the switch member 80 toward the outside of the case 87 is connected to a terminal of the resistor R, and a terminal protruding from the other toward the outside of the case 87 (the first The two terminals 81b) are connected to either the connection cable 60 or the shorting bar 61. The resistor R is always connected to the first terminal 81a, and the connection of the connection cable 60 or the shorting bar 61 to the second terminal 81b is performed when a resistor unit is to be connected. An insulating wall 88 should be provided between the first terminal 81a and the second terminal 81b to avoid accidentally touching the first terminal 81a when the connection cable 60 or the shorting bar 61 is mounted on the second terminal 81b. In addition, A short circuit 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 to switch between a conductive state that is in contact with the fixed contact 81 and a cut-off state that is not in contact with the fixed contact 81. The connection of the connection cable 60 or the short bar 61 to the second terminal 81b is performed in a disconnected state.

The driving member 85 is connected to the control device 43 of the power connection section 40 through a lead wire (control signal line) 86, and the control device 43 of the power connection section 40 performs operation control (switching control of the on state and the off state).

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

If the connection of the connection cable 60 or the shorting bar 61 and the switch member 80 (the second terminal 81b) is performed in a disconnected state where the fixed contact 81 and the movable contact 83 are not in contact, the leakage current of the resistance unit can be reduced. There is a danger of an electric shock to the user who is holding the connection cable 60 or the shorting bar 61 from the outside.

In addition, since the case 87 is filled with an inert gas, between the fixed contact 81 and the movable contact 83 in a cut-off state (or immediately before the conductive state) where the fixed contact 81 and the movable contact 83 are not in contact, The possibility of sparks is also low.

In addition, a cable (first cable 82a, second cable 82b) protruding from the fixed contact 81 to the outside of the case 87 may be provided as the first terminal 81a and the second terminal 81b (see FIG. 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 a resistor R. One of the second cables 82 b is connected to the other of the fixed contacts 81, and the other of the second cables 82 b is connected to the connection cable 60 or the short-circuit bar 61.

Inside the housing 87, an area where the first cable 82a is in contact with the fixed contact 81, an area 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 It is covered with a hermetic container (inner case) 90, and the inside of the hermetic container 90 is filled with an inert gas such as nitrogen. Between the hermetic container 90 and the case 87, an area including at least the first cable 82a and the second cable 82b is filled with an insulating member such as butyl rubber to prevent the first cable 82a and the second cable 82a. The cable 82b is short-circuited.

FIG. 13 shows a state where the insulating member is filled for all the area between the closed container 90 and the case 87, and the area filled with the insulating member is shown in a checkered pattern. A control terminal 89 extending from the driving member 85 at the bottom of the case 87 is connected to a wire (control signal line) 86 (not shown in FIG. 13) composed of a multi-core cable or the like.

In addition, one of the first cable 82a and the fixed contact 81 and the other of the second cable 82b and the fixed contact 81 may be constituted by separate members as shown in FIG. 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 contacts 83.

Next, the wiring between the power connection section 40 and each resistance unit will be described. Resistor group of the first resistance unit 21 (11th resistor group R11 to 18th resistor group R18), resistor group of the third resistance unit 23 (31st resistor group R31 to 38th resistor group R38), The resistor group of the fifth resistance unit 25 (51th resistor group R51 to 58th resistor group R58) passes through each of the frames (the first frame 21a, the third frame 23a, and the fifth frame) mounted on the resistance unit. The connection switching section 70 of the body 25 a) is connected to the power connection section 40.

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

The main body portion 71 is U-shaped or C-shaped in cross section, and extends in the z direction. In this embodiment, the cross section is U-shaped, and includes an intermediate portion 71a having a surface parallel to the back surface of the resistance unit, and an end portion of the intermediate portion 71a extending parallel to the side surface of the resistance unit. The first side surface portion 71b1 and the second side surface portion 71b2 of the surface are configured, and the middle portion 71a, the first side surface portion 71b1, and the second side surface portion 71b2 form an embodiment of the U-shaped or C-shaped cross-sectional shape.

Even when the main body portion 71 is made of a conductive member such as stainless steel, it is connected to the first bus bar 73 and the first switch portion SW1 to the eighth switch portion SW8 through the insulator 50, etc., through which a load test current flows. Since they are isolated from each other, the load test current does not flow through the body portion 71. In addition, 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 extend the ground wire from the first side portion 71b1 and other parts to ground (see FIG. 17).

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

It is desirable to provide a cover portion 71c made of a transparent material such as polycarbonate in a portion facing the inside of the intermediate portion 71a so that members such as a control signal line can be viewed from the outside. The cover portion 71c may be formed integrally with the second side surface portion 71b2, and the second side surface portion 71b2 may also be made of a transparent material such as polycarbonate. At this time, the intermediate portion 71a is integrated with the first side surface portion 71b1.

In addition, a cover portion 71d should be provided on the upper portion of the main body portion 71 to prevent water or the like from entering the inside. The cover portion 71d is omitted in the drawings other than FIG. 17 and FIG. 22.

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

The connection switching portion 70 is mounted on the resistor in a state where the intermediate portion 71a and the first side portion 71b1 are arranged so that the switch portion is located between the terminal of the resistor R connected by the cable and the switch portion and the first bus bar 73. Unit (first resistance unit 21, third resistance unit 23, and fifth resistance 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) at a certain interval (second distance d2) through the insulator 50 extending in the x direction. , And connected to one of the power lines (U-phase line LU, V-phase line LV, W-phase line LW) from the power source of the test object. The first bus bar 73 attached to the connection switching section 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 power source to be tested through the vacuum circuit breaker 41. The first bus bar 73 attached to the connection switching section 70 of the third resistance unit 23 is connected to the V-phase line LV. The V-phase line LV is connected to the S-phase terminal of the power source to be tested through the vacuum circuit breaker 41. The first bus bar 73 attached to the connection switching section 70 of the fifth resistance unit 25 is connected to the W-phase line LW. The W-phase line LW is connected to the T-phase terminal of the power source to be tested through the vacuum circuit breaker 41.

The mounting metal frame 75 is made of stainless steel, has an L-shaped or U-shaped cross section, and extends in the x direction. It connects the insulator 50 and the resistor mounted so as to extend from the back surface (the middle portion 71a) of the main body portion 71 to the y direction. The rear side of the housing (first housing 21a, third housing 23a, fifth housing 25a) of the unit, and the connection switching unit 70 is mounted on the resistance unit (first resistance unit 21, third resistance unit 23, first 5 resistance unit 25).

The first switch section SW1 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 resistor in the first stage from the top. The resistors R of the group (the 11th resistor group R11, the 31st resistor group R31, or the 51st resistor group R51) are connected by a cable. The second switch section SW2 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 resistor in the second stage from the top. The resistors R of the 12th resistor group R12, the 32nd resistor group R32, or the 52nd resistor group R52 are connected by a cable. The third switch section SW3 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 resistor in the third stage from the top. The resistors R of the 13th resistor group R13, the 33rd resistor group R33, or the 53rd resistor group R53 are connected by a cable. The fourth switch section 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-stage resistor from the top. The resistors R of the group (14th resistor group R14, 34th resistor group R34, or 54th resistor group R54) are connected by a cable. The fifth switch section 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 resistor in the fifth stage from the top. The resistors R of the 15th resistor group R15, the 35th resistor group R35, or the 55th resistor group R55 are connected by a cable. The sixth switch section 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 resistor in the sixth stage from the top. The resistors R of the group (16th resistor group R16, 36th resistor group R36, or 56th resistor group R56) are connected by a cable. The seventh switch section 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 resistor in the seventh stage from the top. The resistors R of the group (17th resistor group R17, 37th resistor group R37, or 57th resistor group R57) are connected by a cable. The eighth switch section 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 resistor in the eighth stage from the top. The resistors R of the 18th resistor group R18, the 37th resistor group R38, or the 58th resistor group R58 are connected by a cable.

As shown in FIG. 13, the cable connection between the switch unit and the first bus bar 73 and the cable connection between the switch unit and the resistor R may be a cable installed at a fixed contact included in the switch member 80 ( The first cable 82a connected to the first bus bar 73 and the second cable 82b connected to the resistor may be connected. Alternatively, a terminal may be provided at a fixed contact and a cable connected to the terminal may be used. The appearance of the connection.

The control signal lines (corresponding to the lead wires 86 of the switch member 80) of the first to eighth switch portions SW1 to SW8 pass through the area surrounded by the intermediate portion 71a, the first side portion 71b1, the second side portion 71b2, and the cover portion 71c. Is connected to the control device 43 of the power connection section 40. The switch section (the first switch section SW1 to the eighth switch section SW8), the cable connecting the switch section and the resistor, and the cable connecting the switch section and the first bus bar 73 are provided in the middle section 71a and the first side section 71b1 , Outside the area surrounded by the second side surface portion 71b2 and the cover portion 71c.

The conductive wire 86 constituting the control signal line includes two lines of positive and negative. The positive lines (eight lines corresponding to the first to eighth switch units SW1 to SW8) are connected to the control device 43 respectively. The negative line (8 lines corresponding to the first switch portion SW1 to the eighth switch portion SW8) is connected to the second bus bar 77, and is made of copper provided inside the main body portion 71 via an insulator and extending in the z direction. Made of conductive members. One negative line is connected to the control device 43 through the second bus bar 77. Therefore, in this embodiment, eight positive lines and one negative line corresponding to the first switching portion SW1 to the eighth switching portion SW8 are disposed as control signal lines in each of the connection switching portion 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 section 70 can be seen.

The control signal line (positive line, negative line) can be connected to the switch section. The cable can be directly connected to the switch section. However, for easy mounting and dismounting, the first connector C1 provided near each switch section should still be used. get on. FIG. 17 shows a state where 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). C1's diagram is omitted).

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

The control device 43 executes the connection switching unit mounted on the first resistance unit 21, the third resistance unit 23, and the fifth resistance unit 25 in accordance with the load operation state provided in the operation portion of the power connection portion 40 using a control signal line. The on / off control of the 70 switching devices (the first switching unit SW1 to the eighth switching unit SW8) controls the switching of the resistor group used for the load test.

The control device 43 is provided with a control relay (eight control relays corresponding to the first switch section SW1 to the eighth switch section SW8) 43a, and through the control relay 43a, the control device 43 implements a switching device (the first switch section SW1 to the eighth switch The on / off control of the switch unit SW8) is a preferable aspect.

At this time, as shown in FIG. 14 or FIG. 15, the positive lines of the control signal lines from each switch section (8 × 3 groups, a total of 24 positive lines), each of which is a group, is wired to the control device 43 Eight control relays 43a are provided. In addition, the negative lines of the control signal lines (1 × 3 groups, total of 3 negative lines) from the respective connection switching sections 70 are each connected to the eight control relays 43a. At the time of branching, a configuration may be adopted in which another bus (not shown in the figure) is provided near the control device 43 and the eight control relays 43a are connected to the negative line.

Therefore, rather than short-circuit the control signal line connected to the n-th switch portion SWn (n is 1 or more and 8 or less) of each resistance unit (the first resistance unit 21, the third resistance unit 23, and the fifth resistance unit 25), and In a state where only the control signal line including eight positive lines and one negative line is connected to the control device 43 (refer to FIGS. 23 and 24), the wiring around the control device 43 (the eighth step described later) Although it will become complicated, it has the advantage of protecting the control circuit when one of the switching parts fails, and reducing the impact on the other switching parts (preventing the damage of the other switching parts).

Regardless of the state shown in FIG. 14 or FIG. 15 or the state 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 The n-th switch portion SWn (n is 1 or more and 8 or less) of the attached connection switching portion 70 is all subjected to on-off control at the same timing.

For example, when the first switch section SW1 of the connection switching section 70 mounted on the first resistance unit 21 is on, the first switch section SW1 of the connection switching section 70 mounted on the third resistance unit 23 and the fifth resistance unit 25 It is also in a conducting state. At this time, the 11th resistor group R11 and the 21st resistor group R21 are supplied with power from the P phase of the test target power source, and the 31st resistor group R31 and the 41st resistor group R41 are supplied with the S phase from the test target power supply. Power to the 51st resistor group R51 and the 61st resistor group R61 are supplied with T-phase power from the power source to be tested (see FIG. 18).

By performing the following steps, the wiring work of the load tester 1 can be completed: the resistor groups of the three resistance units (the second resistance unit 22, the fourth resistance unit 24, and the sixth resistance unit 26) are connected to each other. Point connection (1st step); connect each resistor group of the resistance unit adjacent in the x direction (for example, the resistor group of the first resistance unit 21 and the resistor group of the second resistance unit 22) through the connection Connect the cable 60 (second step); attach the connection switching section 70 to three resistance units (the first resistance unit 21, the third resistance unit 23, and the fifth resistance unit 25) (the third step); Connect the resistor group with a cable (step 4); arrange the U-phase wire LU between the power connection section 40 and the first bus bar 73 attached to the connection switching section 70 of the first resistance unit 21 (step 5) ); The V-phase line LV is arranged between the power connection portion 40 and the first bus bar 73 attached to the connection switching portion 70 of the third resistance unit 23 (step 6); the W-phase line LW is arranged at the power connection portion 40 between the first bus bar 73 and the first bus bar 73 attached to the connection switching unit 70 of the fifth resistance unit 25 (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 installation of the resistor R in the resistance unit and the cable connection between the switch section in the switching section 70 and the first bus bar 73 can be completed in advance before the load tester 1 is carried to the installation place. Therefore, after installing the resistance unit mounted on the base part 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 of the components constituting the load tester 1 is efficiently performed.

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

In addition, when the elevator has a size that can mount the resistance unit with the connection switching portion 70 and the base portion, that is, the entire size of the entire set of the base portion, the resistance unit with the connection switching portion 70 attached, and the cooling fan. When the width, height, and depth are smaller than the width, height, and depth of the entrance and exit of the elevator, the third step and the fourth step may be performed in advance before the load tester 1 is transported to the installation place.

Rather than using the connection switching section 70, the resistor group of each resistance unit is connected to the power supply connection section 40 by a cable, and the switching device provided in the power connection section 40 is used to perform the switching control of the used resistor group. In one aspect, by using the connection switching section 70, the number of connection cables between the resistance unit and the power supply connection section 40 can be reduced. This also has the advantage of simplifying wiring.

The first to eighth switch units SW1 to SW8 provided in the connection switching unit 70 have frequent switch-on and switch-off operations even when they are constituted by a switch member filled with an inert gas and having high durability. The possibility of damage. In this aspect, since the switch portion having a higher possibility of damage than the other members is provided in the connection switching portion 70, maintenance is easier.

In addition, 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 resistance unit, and a switch portion is installed in the intermediate portion 71a, it is easier to ensure the exchange or switch portion of the switch portion. Space for repairs, etc.

In addition, since the main body portion 71 of the connection switching portion 70 is detachably mounted on the resistance 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 connection. It is also easy to carry out repair work for the switching unit 70 and the like.

The connection switching unit 70 may be mounted on the side of the resistance unit. However, if there is a space for the connection switching unit 70 between the resistance units adjacent to the resistance unit in the y direction, it may be The connection unit 70 is attached to the front or rear of the resistance unit (see FIG. 19).

In this embodiment, the first surface (intermediate portion 71a) mounted on the switch unit is parallel to the rear surface of the resistor unit, and the second surface (first side portion 71b1) mounted on the first bus bar 73 and the resistor unit In a positional relationship in which the side surfaces are parallel, the connection switching section 70 is mounted on the resistance unit, but it can also be configured to maintain the switch section disposed at the terminal of the resistor R connected by the cable and the switch section and the first bus bar 73 On the premise of the positional relationship, the first surface (intermediate portion 71a) is parallel to the side surface of the resistance unit, and the second surface (first side surface portion 71b1) on which the first bus bar 73 is mounted and the rear surface of the resistance unit In a parallel positional relationship, the connection switching unit 70 is mounted on the resistance unit (see FIG. 20).

In addition, although the description has been given of a case where the connection switching portion 70 is mounted on the resistance unit using the insulator 50 and the mounting metal frame 75 extending in the y-direction, a configuration in which the second side portion 71b2 is provided and mounted on the x In the insulator 50 extending in the direction, the connection switching unit 70 is mounted on the resistance unit (see FIG. 21).

In addition, it is not limited to the combination of 6 resistance units into a load tester in groups of 2 units. As long as there are 2 resistance units, the effects of the present invention (easy to carry or install) can be obtained.

In addition, the embodiment shown in FIG. 1 to FIG. 24 illustrates the arrangement of a resistance unit (having an intake port and an exhaust vent opening in a vertical direction) above a cooling fan that draws in air from the bottom surface and blows cooling air from the top surface. The resistance unit of the port) allows cooling air to flow from below to above, but it can also be configured to install a resistance unit (with an air intake opening in the horizontal direction) through an insulator 50 in front of the cooling fan that exhausts the air horizontally. Port and resistance unit of the exhaust port) with cooling air flowing from the rear to the front (see Figure 25).

FIG. 25 shows that two resistance units (first resistance unit 21) are arranged beside the two abutment portions [the first abutment portion (the first cooling portion) 11 and the second abutment portion (the second cooling portion) 12]. , The second resistance unit 22) (illustrations of other resistance units connected through the neutral connection method are omitted).

In the embodiment shown in FIG. 25 and FIG. 26, the horizontal direction in which the first abutment portion (first cooling portion) 11 and the second abutment portion (second cooling portion) 12 are juxtaposed is the x direction, and the first The horizontal direction in which the one base part 11 and the first resistance unit 21 are arranged side by side 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 a state in which 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 arranged may also be arranged in the vertical direction. A pattern that extends in the direction (parallel to the z direction).

In order to support the resistance unit, the insulator 50 should be provided between the resistance unit and the installation surface.

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

When the resistance unit and the cooling fan are arranged laterally, since the hot air is discharged laterally, it is appropriate to provide a guide for changing the exhaust direction from the horizontal direction to the upper direction, and the hot air discharged upward from the resistance flow unit downstream of the resistance unit. Air duct (has an air intake opening to the horizontal direction and an air exhaust opening to the vertical direction, and an air duct exhausting upwards), and the exhaust port of the resistance unit and the air intake of the air duct are mutually Opposingly, the resistance unit and the air duct are connected in a detachable state (see FIG. 26).

In order to show the internal structure, the air duct is separated from the resistance unit as shown in Figure 26. However, in actual use (during the load test), in order to prevent hot air from leaking out, the air inlet of the air duct and the resistance unit The exhaust ports are arranged close to each other.

In addition, each of the resistor units may have a plurality of resistor groups parallel to the x direction in the z direction (vertical direction), and a plurality of resistor groups side by side in the y direction (horizontal direction) (see FIGS. 25 and 26). It is also possible that the resistors R parallel to the x-direction are parallel to each other in the y-direction (horizontal direction) in the z-direction (vertical direction) (see FIG. 27). In either case, you can switch the resistor group used, change the load condition of the power supply to be tested, and perform a load test.

In either case, at least the position of the housing of the resistance unit (the surface of the resistance unit that forms the outside of the suction and exhaust ports, and the surfaces other than the front and back surfaces) is opposite to the adjacent resistance unit. The surfaces are arranged at a first inner distance d1 from the side of the abutment section (cooling section) (the surface other than the front face and the back face of the air intake and exhaust ports that form the shape of the cooling section).

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

In any case, the state of the resistor unit is placed above the base section (cooling section) under the relationship of the internal space of the elevator (the state of FIGS. 25 to 27 is changed to the state of being vertically placed) ), Consider the case of carrying out.

In addition, in this embodiment, the structure of the connection switching unit 70 will be described using a load tester 1 in which six resistance units are combined into groups of two. However, the structure using the resistance unit of the connection switching unit 70 is not limited to a load tester in which 6 resistance units are combined into groups of two, even a load in which the resistance unit and the connection switching unit 70 are combined into one group The test machine can also use the connection switching unit 70 including the first bus bar and the switch unit according to this embodiment to efficiently perform wiring of components constituting the load test machine.

1‧‧‧ Dry Load Tester

11 ～ 19‧‧‧1st abutment section to 9th abutment section

20‧‧‧ interval adjustment member

21 ～ 26‧‧‧1st resistance unit to 6th resistance unit

21a ～ 26a‧‧‧1st frame ～ 6th frame

31 ～ 36‧‧‧The first cooling fan to the sixth cooling fan

31a ～ 36a‧‧‧The first ventilation hood ～ the sixth ventilation hood

40‧‧‧Power connection section

41‧‧‧vacuum circuit breaker

43‧‧‧control device

43a‧‧‧Control Relay

50‧‧‧ insulator

60‧‧‧ Connect the cable

61‧‧‧Short stick

70‧‧‧Connection Switching Department

71‧‧‧Body

71a‧‧‧Middle

71b1, 71b2 ‧‧‧ 1st side part, 2nd side part

71c‧‧‧Cover

71d‧‧‧cover

73‧‧‧The first bus

75‧‧‧Mounting metal frame

77‧‧‧ 2nd bus

80‧‧‧ Switch components

81‧‧‧ fixed contact

81a, 81b‧‧‧1st terminal, 2nd terminal

82a, 82b‧‧‧1st cable, 2nd cable

83‧‧‧ movable contact

85‧‧‧Driver

86‧‧‧Wire

87‧‧‧shell

88‧‧‧ insulation wall

89‧‧‧Control terminal

90‧‧‧ airtight container (inner shell)

C1, C2‧‧‧ first connector, second connector

d1 ～ d3‧‧‧1st distance ～ 3rd distance

LU‧‧‧U phase line

LV‧‧‧V phase line

LW‧‧‧W phase line

SW1 ～ SW8‧‧‧1st switch unit ～ 8th switch unit

R‧‧‧ resistor

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‧‧‧ directions

P‧‧‧P phase terminal

S‧‧‧S-phase terminal

T‧‧‧T phase terminal

[Fig. 1] This is a plan view of the dry load tester according to this embodiment, and in a state before the abutment portions are adjacent to each other. [Fig. 2] It is a top view of the dry load tester according to this embodiment, and in a state where the abutment portions are adjacent to each other. 3 is a perspective view showing a structure of a first resistance unit to a sixth resistance unit, a first base portion to a sixth base portion, an insulator, and a first cooling fan to a sixth cooling fan. 4 is a perspective view showing a structure of a first resistance unit, a second resistance unit, an insulator, a first abutment portion, and a second abutment portion. 5 is a rear view showing the structure of a first resistance unit, a second resistance unit, an insulator, a first abutment portion, and a second abutment portion. 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] This is a plan view of a dry load tester according to this embodiment, and abutment parts adjacent to each other in the x direction are integrated. [Fig. 8] Fig. 8 shows the structure of the first resistance unit, the second resistance unit, the insulator, the first abutment portion, and the second abutment portion in a state where the connection cable of Fig. 5 is replaced with a shorting rod. 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 switching member. 10 is a rear view showing the structure of a first resistance unit, a second resistance unit, an insulator, a first abutment portion, and a second abutment portion in a connection state using a switching member. [FIG. 11] A perspective view of a switching member. [Fig. 12] A sectional structural view of a switching member. 13 is a sectional structural view of a switch member having a structure different from that of FIG. 12. [Fig. 14] This is a dry load tester according to this embodiment, and is a plan view in a state where the abutment portions are adjacent to each other, and the wiring between the power connection portion and the resistance unit is shown. [FIG. 15] A perspective view showing the structures of the first resistance unit to the sixth resistance unit, 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 out-connection switching unit is mounted on the first resistance unit, the third resistance unit, and the fifth resistance unit. [FIG. 16] A perspective view showing a structure of a first resistance unit, a second resistance unit, an insulator, a first abutment portion, and a second abutment portion, and shows a connection switching portion mounted on a side portion of the first resistance unit. status. [FIG. 17] A perspective view of a connection switching section. [FIG. 18] A schematic diagram showing a circuit structure of a load tester. 19 is a perspective view showing a structure of a first resistance unit, a second resistance unit, an insulator, a first abutment portion, and a second abutment portion, and shows a state where a connection switching portion is mounted on a rear portion of the first resistance unit . 20 is a perspective view showing the structure of a first resistance unit, a second resistance unit, an insulator, a first abutment portion, and a second abutment portion, and shows a state where an intermediate portion is parallel to a side surface of the resistance unit, The connection switching unit is mounted on the first resistance unit. [FIG. 21] A perspective view showing a structure of a first resistance unit, a second resistance unit, an insulator, a first abutment portion, and a second abutment portion, and shows the use of being provided on a second side surface portion and extending in the x direction. , The state where the connection switching portion is mounted on the first resistance unit. [FIG. 22] A perspective view of a connection switching section connected to a control signal line using a second connector. 23 is a plan view showing a wiring between a power supply connection portion and a resistance unit in a state where a control signal line of a switch portion corresponding to a resistor group of the same number of stages is short-circuited and connected to a control device. [Fig. 24] It shows the state in which the control signal line of the switch section corresponding to the same number of resistor groups is short-circuited and connected to the control device, the first resistance unit to the sixth resistance unit, the first base unit to the first A perspective view of the structure of the 6 base section, the insulator, the first cooling fan to the sixth cooling fan, and the connection switching section. [Fig. 25] It shows a state in which a cooling fan is arranged beside a resistor unit in which a resistor group is arranged side by side in a horizontal direction, the first resistor unit, the second resistor unit, the insulator, the first base part, and the second base. A perspective view of the structure of the table. [FIG. 26] A perspective view showing a state where the air duct is arranged in FIG. 25. [FIG. [Fig. 27] It shows a state in which a cooling fan is arranged beside a resistor unit in which a resistor group is arranged side by side in a vertical direction. The first resistor unit, the second resistor unit, the insulator, the first base part, and the second base A perspective view of the structure of the table.

Claims (12)

A load testing machine, characterized in that: two or more resistor units are provided, and each resistor unit includes: a plurality of resistor groups arranged side by side in a vertical direction, that is, in a z direction, and each resistor group is formed in a horizontal direction It is composed of resistors arranged side by side; and a frame body covering the sides of such resistor groups; it is composed of individual independent individuals, and is provided with two or more abutment parts with cooling fans; At least one or more of the resistance units are mounted on the upper side; the frame is located at least on the surface facing the other resistance units in a positional relationship with each other, and is arranged on the side of the abutment portion on which the resistance units are mounted when viewed from above. Closer to the inner first distance; the two or more resistor units are arranged side by side so that the interval of the frame of the adjacent resistor unit is more than the second distance; the second distance is at least 2 of the first distance 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. For example, the load tester of the scope of application for a patent, wherein the first distance is 45 mm or more; the resistance unit includes the first resistance unit to the sixth resistance unit; the cooling fan includes the first cooling fan to the sixth cooling fan; The abutment portion includes a first abutment portion to a sixth abutment portion; the first cooling fan is installed in the first abutment portion, and the first resistance unit is mounted on the upper portion of the first abutment portion via an insulator. ; The second cooling fan is installed in the second base section, and the second resistance unit is mounted on the upper part of the second base section via an insulator; the third cooling fan is installed in the third base section, and The third resistor unit is mounted on the upper portion of the third base portion via an insulator; the fourth cooling fan is installed in the fourth base portion; and the fourth resistor is mounted on the upper portion of the fourth base portion via the insulator. Resistance unit; the fifth cooling unit is installed in the fifth base unit, and the fifth resistance unit is installed above the fifth base unit via an insulator; the sixth cooling fan is installed in the sixth base unit And the sixth resistance unit is mounted on the upper part of the sixth base part via an insulator; the first base part, the third The abutment portion and the fifth abutment portion each constitute an independent individual; the second abutment portion, the fourth abutment portion, and the sixth abutment portion each constitute an independent individual; the first resistance unit and The second resistance unit is arranged side by side in the x direction perpendicular to the z direction through an interval that is greater than the second distance; the third resistance unit and the fourth resistance unit are separated by an interval that is greater than the second distance, Side by side in the x direction; the fifth resistor unit and the sixth resistor unit are side by side in the x direction with an interval of more than the second distance; the first resistor unit, the third resistor unit, and the first resistor unit 5 resistance units, which are arranged side by side in the y direction perpendicular to the x direction and the z direction through a distance longer than the third distance by the second distance; the second resistance unit, the fourth resistance unit, and the The sixth resistance units are arranged side by side in the y direction with an interval equal to or greater than the third distance. For example, the load tester in the second scope of the patent application, wherein the first base portion and the second base portion are integrated; the third base portion and the fourth base portion are integrated; the fifth base The platform portion is integrated with the sixth base portion. For example, the load testing machine of the second patent application range, wherein the resistor is a rod-shaped resistor extending in the y direction, and the resistor group is composed of a plurality of resistors side by side in the x direction; The first abutment portion and the third abutment portion, the second abutment portion and the fourth abutment portion, the third abutment portion and the fifth abutment portion, the fourth abutment portion and the An interval adjusting member is provided between the sixth abutment portions; the width in the y direction of the interval adjusting member is longer than the second distance; the third distance is two times the first distance and the interval adjustment The sum of the width of the component in the y direction. For example, the load testing machine in the second scope of the patent application, which further includes a connecting cable or a shorting rod; the connecting cable or shorting rod is used to phase the distance in the x direction by a distance greater than the second distance. The resistor group of two adjacent resistor units is also a connecting member that is connected in series between two resistor groups adjacent in the x direction in a state that can be detached at more than two places. The resistance unit group formed by connecting the resistor groups of two adjacent resistance units in series in the x direction with an interval greater than or equal to the second distance in accordance with the rated voltage of the power source to be tested when performing a power load test. . For example, the load tester under the scope of patent application No. 5, wherein the connection of the connecting cable or shorting bar with the resistor group is through a fixed contact, a movable contact, and a driving member for driving the movable contact. And includes a switching member including a case filled with an inert gas. For example, the load tester under the scope of patent application No. 5 is provided with three connection switching sections, the connection switching section includes: a main body section; a switch section for controlling the plurality of resistor groups for load testing A resistor group; and a first bus bar that is connected to one of the terminals of the switch unit and one of the power cords of the power source of the test object of the load test; one of the terminals of one of the resistors of the resistor group One side is connected to the other terminal of the switch portion; the main body portion has a first surface on which the switch portion is mounted, and a first portion on which the first bus bar is installed at a certain interval perpendicular to the first surface through the insulator. 2 sides; the three connection switching sections are arranged in a detachable manner so that the switch section is arranged between a terminal of a resistor connected by a cable and the switch section and the first bus bar; The first resistance unit, the third resistance unit, and the fifth resistance unit. For example, the load tester in the second scope of the patent application, wherein a first cooling fan is provided between the first cooling fan to the sixth cooling fan and the first resistance unit to the sixth resistance unit. ~ The cooling air of the sixth cooling fan is guided to the cylindrical ventilation hood of the first resistance unit ~ the sixth resistance unit; the upper portion of the cylindrical ventilation hood is located inside the frame covering the side of the resistor group, It is separated from the frame by a distance of 10 mm or more. For example, the load tester of the scope of application for a patent, wherein the first distance is 45 mm or more; the resistance unit includes a first resistance unit and a second resistance unit; the cooling fan includes a first cooling fan and a second cooling fan; The abutment portion includes a first abutment portion and a second abutment portion; the first abutment portion is provided with the first cooling fan and the first resistance unit is installed on the upper portion; the second abutment portion is provided inside The second cooling fan, and the second resistance unit is mounted on the upper part of the second base part; the first resistance unit and the second resistance unit are spaced apart from the second distance in the z direction Side by side in the vertical x direction. A load tester is characterized in that it is provided with two or more resistance units, each of which includes: a plurality of resistor groups arranged side by side, each resistor group being composed of side by side resistors; and a frame body covering the resistors The side of the device group; a cooling part with a cooling fan is built in to form an independent individual and two or more are installed; each of the cooling parts is installed with at least one or more of the resistance units; the frame is located at least with other The surfaces of the resistance units facing each other are arranged at a first inner distance from the side of the cooling unit on which the resistance units are mounted; the two or more resistance units are formed by the frames of the adjacent resistance units. The distance between the body is side by side above the second distance; the second distance is at least twice the first distance; the amount of protrusion of the resistor terminal from the frame covering the side of the resistor group is greater than the first distance 1 the distance is shorter. For example, the load tester under the scope of patent application No. 10, wherein the first distance is 45 mm or more; the resistance unit includes a first resistance unit and a second resistance unit; the cooling fan includes a first cooling fan and a second cooling fan; The cooling section includes a first cooling section and a second cooling section; the first cooling section includes the first cooling fan and the first resistance unit is installed; and the second cooling section includes the second cooling fan. And the second resistance unit is installed; the first resistance unit and the second resistance unit are arranged side by side with an interval greater than the second distance. For example, the load tester under the scope of patent application No. 10, wherein the cooling fan exhausts air in a horizontal direction; the resistance unit has an air inlet opening in a horizontal direction and an air outlet opening in a horizontal direction; An air duct is provided downstream of the resistance unit, and has an air inlet opening in a horizontal direction and an air outlet opening in a vertical direction, and exhausts upward.