JP2010025752A - Dry type load test device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dry type load test device for suppressing spark occurrence in a switching member even when it is installed outdoors or the like for a long time. <P>SOLUTION: The dry type load test device includes a resistance body for high voltage load test where a plurality of slender resistance elements r<SB>i</SB>are arranged at intervals horizontally and perpendicularly and are interconnected in series horizontally, a plurality of switching members SWb<SB>ij</SB>, a plurality of electric conduction members Ca<SB>j</SB>and Cb<SB>j</SB>between assemblies, and a switch for high voltage (vacuum circuit breaker) for connecting some of the plurality of electric conduction members Ca<SB>j</SB>and Cb<SB>j</SB>between assemblies to a power supply (three-phase alternating-current generator). The switching members SWb<SB>ij</SB>have a sealed case body 69 that is filled with inert gas and includes a pair of fixed contacts (contact parts) connected to a pair of terminals Pa and Pb, a movable contact M conducting the pair of fixed contacts, and a driving means (solenoid) for driving the movable contact. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a dry load test apparatus used for an electric load test of an AC generator or other power source, for example.

  Conventionally, as a dry load test apparatus for setting a load capacity by a combination of a plurality of rod-shaped resistance elements, the resistance elements are arranged in parallel in the horizontal direction and the vertical direction, and the resistances are arranged in the horizontal direction. A device in which elements are connected in series is known (for example, see Patent Document 1).

  In the conventional dry load test apparatus, a plurality of switching members in which one terminal is connected to one end portion of each resistance element, and a plurality of sets in which the other terminal of each switching member is connected in each row arranged in the vertical direction. It includes a three-dimensional conductive member and one vacuum circuit breaker that connects some of the plurality of inter-assembly conductive members to a power source for testing.

Here, the switching member has a case that can be divided, a fixed contact connected to a pair of terminals in the case, a movable contact that conducts the fixed contact, and a drive means that drives the movable contact. Built-in solenoid.
WO01 / 40817 Publication

  However, in conventional dry-type load testing devices, the case of the switching member case is poorly sealed, so if it is installed outdoors for a long period of time, fine dust will enter the case and adhere to each fixed or movable contact. There has been a problem that when a pair of fixed contacts are conducted, a spark (discharge) is generated and seizure of each contact occurs.

  The present invention has been made paying attention to the above problem, and an object of the present invention is to provide a dry load test apparatus capable of suppressing the occurrence of sparks in a switching member even when installed outdoors for a long time. And

  In order to achieve the above object, in the present invention, a plurality of resistor assemblies in which a plurality of elongated resistor elements are arranged in parallel in the horizontal direction and connected in series, and the plurality of resistor assemblies are arranged in the vertical direction. A resistor main body for a high voltage load test having a plurality of resistance element rows composed of a plurality of the resistance elements arranged in parallel in the vertical direction, and each resistance element of the plurality of resistance element rows A plurality of switching member rows composed of a plurality of switching members having one terminal connected to one end, a plurality of inter-assembly conductive members connected to the other terminal of each switching member of the plurality of switching member rows; A high-voltage switch for connecting some of the inter-assembly conductive members to the power source for testing, wherein the switching member is connected to each of the pair of terminals A pair of fixed contacts, a movable contact for conducting the pair of fixed contacts, a drive means for driving the movable contact, the fixed contact, the movable contact, and the drive means, and filled with an inert gas. And a sealed case body.

  Therefore, in the dry load test apparatus of the present invention, for example, even when installed outdoors for a long period of time, the fixed contact, the movable contact, and the driving means are built in the sealed case body. Can prevent fine dust from adhering to each contact or the like. Furthermore, the invasion of malignant gas can be more effectively prevented by filling the inside of the sealed case with an inert gas. As a result, the occurrence of sparks in the switching member can be suppressed even when installed outdoors for a long time.

  Hereinafter, the best mode for realizing the dry load test apparatus of the present invention will be described based on Examples 1 to 4 shown in the drawings.

First, the configuration will be described.
FIG. 1A is a plan view of a mobile dry load test apparatus (mobile electric load test apparatus) according to the present invention, and FIG. 1B is a side view of FIG. 1A.

  The mobile dry load test apparatus includes a truck 30 and a dry load test apparatus (electric load test apparatus) 40. The truck 30 includes a loading platform 31 and a box 32 provided on the loading platform 31. A cargo room 33 is provided inside the box 32, and the dry load test apparatus 40 is disposed in the cargo room 33.

[Schematic configuration of dry load test apparatus 40]
2 is a schematic plan view schematically showing an internal dry load test apparatus by breaking the box shown in FIGS. 1A and 1B, and FIG. 3 is a view of the dry load test apparatus in FIG. 4 is a schematic side view of the dry load test apparatus of FIG. 2 as viewed from the direction of arrow B, and FIG. 5 is a diagram of the dry load test apparatus of FIGS. 1A to 4 and the power source to be tested. FIG. 6 is a schematic explanatory view showing a connection example, and FIG. 6 is a partial perspective view of a part of FIG.

  The dry load test apparatus 40 includes a frame 41 provided in the cargo compartment 32, and R-phase, S-phase, and T-phase resistance units 42, 43, and 44 disposed on the frame 41 adjacent to each other. And have. The resistance units 42, 43, and 44 have the same configuration.

[Resistance units 42, 43, 44]
7A is a side view of the resistance unit shown with a part of the electric fan of FIGS. 3 and 4 cut away, FIG. 7B is an explanatory view of the insulating plate of FIG. 7A, and FIG. 8 is the resistance unit of FIG. It is an expanded sectional view which shows the relationship between and a switching member.

  Each resistance unit 42, 43, 44 includes a base frame 45 disposed on the frame 41, a heat-resistant and insulating anti-vibration insulating rubber 46 interposed between the frame 41 and the base frame 45, and anti-vibration Plates 47 and 47 baked and fixed to both upper and lower ends of the insulating rubber 46, fixing bolts 48 and 48 provided integrally with the plates 47 and 47 and penetrating the frame 41 and the base frame 45, respectively, and fixing bolts 48 and 48 Fixing nuts 49 and 49 are respectively screwed to both ends.

  The resistance units 42, 43, 44 are arranged below the base frame 45 and the frame 41 and are attached to the frame 41, and an insulator (insulating member) 51 fixed on the base frame 45. And a housing 52 that is fixed on the insulator 51 and whose upper and lower ends are open, and an insulating hood 53 that guides the cooling air from the electric fan 50 to the housing 52.

  The housing 52 is formed by closing a side opening of a hexahedral frame 54 formed from an angle with a side opening closing plate such as an insulating plate 55a, 55b, 55c, 55d formed of an epoxy heat-resistant material. (See FIG. 8). The insulating plates 55a, 55b, 55c, and 55d are fixed to the frame 54 by a fixture 56 such as a bolt and a nut. The side opening closing plates such as the insulating plates 55b and 55d can be replaced with side opening closing plates made of a heat-resistant noncombustible material other than the insulating material. As this material, for example, an aluminum plate or an iron plate can be used.

In the insulating plates 55a and 55c, as shown in FIG. 7B, a large number of mounting hole arrays H _i [i = 1, 2, 3. This mounting hole row H _i is formed from a large number of mounting holes h _j [j = 1, 2, 3. In the first embodiment, the mounting hole row H _i is provided in 22 rows (i = n = 22), and the mounting hole h _j is provided in 16 rows (j = m = 16). Incidentally, the mounting hole h _j is not limited to 16, the mounting hole column H _i there is no intention to be limited to 22 rows. Note that the mounting holes h _j of the upper and lower mounting hole rows H _i are alternately provided with a half pitch shift left and right.

[Resistor bodies 57R, 57S, 57T of the resistor units 42, 43, 44]
FIG. 9 is a circuit diagram of the dry load test apparatus of FIGS. 1 to 8, and FIG. 10 is a partially enlarged explanatory view of FIG.

  Each resistance unit 42, 43, 44 has a resistance main body 57 </ b> R, 57 </ b> S, 57 </ b> T disposed in the housing 52.

Resistance body 57R, 57S, 57T is a mounting hole column _{H i} numerous flat resistor assemblies _R i which is arranged in multiple stages in the vertical in correspondence _{with, S i, T i [i} = 1,2,3 · ..N] (see FIG. 9). In the first embodiment, since the mounting hole row H _i is 22 rows, the resistance assemblies R _i , S _i , T _i are also provided in 22 stages corresponding to the mounting hole row H _i . In FIG. 9, only large symbols are attached for convenience of illustration. Further, since the resistance assembly _R i shown in FIG. _9, the configuration of the S i, _{T i} is the same, the resistance assembly _{R i,} S i, the intersection of _{T i} shown enlarged in FIG. 10, FIG. 9 The reference numerals that could not be added due to the illustration shown in FIG.

As shown in FIG. 8, the resistance assemblies R _i , S _i , and T _i are arranged in a flat shape (planar shape), and a plurality of rod-shaped resistance elements (heaters) r _j [insulated at both ends]. j = 1, 2, 3... m] and conductive connecting pieces 58a _j , 58b _j−1 [j = 1] connecting a plurality of adjacent resistance elements (heaters) r _j in series at the end. , 2, 3... M / 2].

A plurality of resistive elements (heaters) r _j is because it is arranged so as to correspond to the mounting hole h _j, to 16 inborn in the horizontal direction corresponding to the first embodiment in the mounting hole h _j. Since the mounting hole h _j of the upper and lower mounting holes column H _i as described above are provided shifted by a half pitch in the left and right, the resistance element r _j attached to the mounting hole h _j of the upper and lower mounting holes column H _i is The vertical resistance elements r _j are arranged in a zigzag manner, shifted by a half pitch left and right. Thus, the electric fan insulating plate 55a from below by 50, 55b, the cooling air supplied between 55c is the mounting hole against the efficient and below the mounting hole column H _i resistive element r _j attached to the mounting hole h _j of All the resistance elements r _{j in the} column H _i are efficiently cooled.

Incidentally, the electrically conductive connection pieces 58a _j of the multi-stage resistor assemblies _R 1 to R _n constitutes a connection piece column in a line vertically, multistage resistor assemblies _R 1 to R each conductive connecting piece 58b _j of _{n -1} constitutes a connection piece row in one row up and down, and each resistance element (heater) r _j of the multi-stage resistor assemblies R _{1 to} R _n is arranged in a row in the vertical direction to constitute a resistor element row. .

[Resistance element r _{j of} resistance assembly R _i , S _i , T _i ]
FIG. 11A is an explanatory view showing a part of the resistance element shown in FIG. 8 while being broken, and FIG. 11B is an explanatory view showing an end portion enlarged structure of the resistance element of FIG. 11A, and FIG. It is explanatory drawing which shows the other example of the edge part holding structure of 11 A resistance elements.

The resistance element r _j includes a cylindrical body 59 made of a metal material having high thermal conductivity, stainless steel, or the like, a radiating fin 60 fixed to the outer periphery of the cylindrical body 59, and one end portion in both ends of the cylindrical body 59. Have rod-shaped electrodes 61, 61 inserted concentrically, and insulators (insulating members) 62, 62 integrally and concentrically fixed to the outer periphery of the intermediate portion of the rod-shaped electrodes 61, 61. The insulator 62 is made of a ceramic insulator or the like, and has an annular groove 62a that prevents dust from adhering to the peripheral surface.

The resistance element r _j includes a resistance wire (a heater wire such as a nichrome wire) 63 disposed at the center of the cylindrical body 59 and connected to both ends of the rod-shaped electrodes 61, 61, an inner surface of the cylindrical body 59, and a rod shape. An insulator (insulating member) 64 formed of an insulating material load such as magnesia filled between one end of the electrodes 61 and 61 and the resistance wire 63, and a fixing screwed to the other end of the rod-shaped electrode 61 Nuts 65 and 65a. The conductive connection piece 58 is fixed to the resistance element r _j by fastening and fixing between the fixing nuts 65 and 65a.

  Further, as shown in FIGS. 11A and 11B, an annular or tubular heat-resistant caulking material (heat-resistant sealing material) 64a is fitted between the end of the tubular body 59 and the rod-shaped electrode 61, and an insulator (insulating) By pressing with the member 62, moisture is prevented from entering the insulator 64 by the heat-resistant caulking material 64a. Further, in order to withstand a high voltage, the length of the insulator 62 is set to about 10 mm or more, for example, and the insulation distance between the conductive connection piece 58 and the cylinder 59 is sufficient. Is secured.

  An insulating member 66 having heat resistance and elasticity is fixed in the vicinity of both ends of the cylindrical body 59. The insulating member 66 is made of silicon rubber (synthetic resin) having heat resistance and elasticity. An annular mounting groove 66 a is formed in the central portion of the insulating member 66.

The resistance elements r _j of the resistance assemblies R _i , S _i , T _i are arranged corresponding to the mounting holes h _j of the mounting hole row H _i as described above. The resistance element r _j is configured such that the insulating members 66 and 66 on both ends are fitted into the mounting holes h _j and h _j of the insulating plates 55a and 55c, and the insulating plates 66 and 66 are fitted into the annular mounting grooves 66a and 66a. By engaging 55a and 55c, they are held (fixed) to the insulating plates 55a and 55c.

By holding the cylindrical body 59 on the insulating plates 55a and 55c with the elastic heat-resistant and elastic insulating member 66 in this way, the vibration shock during the movement of the track is transmitted to the resistance element _rj , and the resistance It is possible to prevent the element r _{j from} being damaged by vibration shock or the like. Further, the insulating plates 55a and 55c for supporting the resistance element r _j are formed from an epoxy resin-based relatively heat-resistant material, but the insulating member 66 is formed from heat-resistant silicon rubber (synthetic resin) or the like. to heat directly the insulating plate 55a of the resistive element r _j, by not transmitted to 55c, it is possible to improve the insulation plate 55a, the durability of the 55c.

  Furthermore, in the first embodiment, the insulating member 66 is made of heat-resistant and elastic silicon rubber (synthetic resin) or the like, but is not necessarily limited thereto. That is, when the dry load test apparatus 40 is installed and fixed in a non-moving state, the insulating member 66 is formed from a ceramic insulator 66 'as shown in FIG. 11C, and is insulated from the insulating member 66'. You may make it hold | maintain board 55a, 55c.

[Switching members SWa _ij , SWb _ij ]
FIG. 12 is an explanatory view showing the positional relationship between the switching member and the inter-assembly conductive member as seen from the direction of arrow A in FIG. 2, and FIG. 13 is a diagram showing the conductive relationship between the switching member and the assembly as seen from the direction of arrow B in FIG. FIG. 14 is an explanatory view showing the arrangement relationship with the members, FIG. 14 is an explanatory view showing the relationship between the resistance assembly of FIG. 9 and a member that short-circuits the resistance element of the resistance assembly, and FIG. 15 is a resistance diagram of FIG. It is a partial expanded explanatory view which shows the relationship between an assembly and a switching member.

  The dry load test apparatus 40 has insulating plates 67 and 68 disposed at positions sandwiching the resistance units 42, 43, and 44 in a state of being spaced from the resistance units 42, 43, and 44 (FIGS. 3 and 4). FIG. 6). The insulating plates 67 and 68 extend in the arrangement direction of the resistance units 42, 43, and 44 and are formed in a size that covers the entire sides of the resistance units 42, 43, and 44. The lower ends of the insulating plates 67 and 68 are attached to the frame 41 by attachment means such as bolts and nuts (not shown).

The first switching member rows SWa _i , SWb _i [i = 1, 2, 3,... N are formed on the surfaces 67 a, 68 a of the insulating plates 67, 68 opposite to the resistance units 42, 43, 44. ] Are arranged in multiple stages corresponding to the resistance assemblies R _i , S _i , T _i (see FIGS. 3, 4, 12, 13, and 14).

Each first switching member row SWa _i , SWb _i includes half the number of first switching members SWa _ij , SWb _ij [j _] of the resistance elements (heaters) r _j of the resistance assemblies R _i , S _i , T _i. = 1, 2, 3,... M / 2]. The first switching members SWa _ij and SWb _ij have normally open contacts and are attached to the insulating plates 67 and 68, respectively.

At this time, as shown in FIG. 6, the first switching member _SWa ij, _{SWb ij,} as mounting support 73 to be described later do not interfere with each other, each of the first switching member columns _SWa i, SWb _i The mounting support portion 73 is fixed in an inclined state with respect to the arrangement direction of each of the resistance assemblies R _i , S _i , T _i . In FIG. 6, the outlet 76, the insulating wall 77, the insulating roof 78, and the lead wires 82 and 83, which will be described later, are omitted for convenience of explanation.

[Structure of the switching members SWa _ij and SWb _ij ]
16 is a perspective view showing the appearance of the switching member shown in FIG. 15, FIG. 17 is a front view of the switching member of FIG. 16, FIG. 18 is a side view of the switching member of FIG. 16 is a plan view of the switching member of FIG. 16, FIG. 20 is a longitudinal sectional view showing the internal structure of the switching member of FIG. 16, and FIG. 21 is a longitudinal sectional view of the internal structure shown in FIG. FIG. 22 is an operation explanatory diagram of the switching member of FIG. 21, and FIG. 23 is a schematic circuit diagram for controlling the operation of the switching member shown in FIG.

The first switching members SWa _ij and SWb _ij have a sealed case body 69 and an inert gas G such as nitrogen filled in the sealed case body 69.

  The sealed case body 69 includes a cylindrical case 70 made of an insulating material such as Teflon (registered trademark) that can withstand a high voltage, and an upper case 71 made of an insulating material such as Teflon that can withstand a high voltage. 70 and the upper case 71 are welded and joined to each other by ultrasonic welding or the like, and the divided portions are sealed.

  The cylindrical case 70 includes a cylindrical case main body 72 opened upward, a pair of attachment support portions 73, 73 projecting laterally from the lower end portion of the case main body 72, and the case main body 72 from each attachment support portion 73. It has a pair of positioning protrusions 73a, 73a extending in the axial direction.

  The pair of attachment support portions 73 and 73 are formed at positions facing each other across the center of the case main body 72. In addition, each attachment support portion 73 is formed with a screw hole 73b through which a fixing screw (not shown) for fixing the switching member is screwed.

  The upper case 71 is fixed so as to cover the open end of the case main body 72 of the cylindrical case 70. On the upper surface 71a of the upper case 71, a pair of terminal holes 71b and 71b through which the pair of terminals Pa and Pb are screwed are formed. Further, a plurality of positioning protrusions 71c,... Facing the positioning protrusions 73a, 73a are formed on the side surface of the upper case 71.

  The terminals Pa and Pb are respectively screwed into the terminal hole 71b at one end, and fixed portions 74a and 74b projecting from the terminal hole 71b are formed, and a contact portion (fixed contact) inserted into the cylindrical case 70 at the other end. ) 75a and 75b are formed. Here, the fixing portions 74a and 74b are formed with thread grooves on the peripheral surfaces, and the bolts B and the plurality of nuts N are screwed to the tip portions protruding from the terminal holes 71b. The contact portions 75a and 75b have a round bar shape without a thread groove on the peripheral surface.

  Further, an upper surface 71 a of the upper case 71 is supported by an outlet 76 of lead wires 82 and 83 connected to a solenoid S described later, an insulating wall 77 that partitions a pair of terminals Pa and Pb, and an insulating wall 77. And an insulating roof 78 that covers the upper side of the pair of terminals Pa and Pb. The outlet 76, the insulating wall 77, and the insulating roof 78 are each formed of an insulating material such as synthetic resin.

  The outlet 76 has a cylindrical shape that gradually decreases toward the upper end, and is integrally formed with the upper case 71. Further, lead wires 82 and 83 pass through the outlet 76.

  The insulating wall 77 and the insulating roof 78 are integrally formed, and are fixed to the upper case 71 by screws 77a. The insulating roof 78 has a disk shape that covers the upper case 71 when viewed from above (see FIG. 19). 20 to 23, illustration of the insulating wall 77 and the insulating roof 78 is omitted for convenience of explanation.

  On the other hand, the cylindrical case 70 is attached to a solenoid S as a driving means held by a solenoid holding frame 79, a contact holding plate 80 held so as to be able to advance and retreat with respect to the solenoid S, and the contact holding plate 80. The movable contact M and a pair of lead wires 82 and 83 that are connected to the solenoid S and drawn out from the outlet 76 are incorporated.

  The solenoid S is attached to the iron core 83a fixed to the bottom surface of the cylindrical case 70, a coil (solenoid main body) 83b wound around the iron core 83a, and a movable member attached to the vicinity of the lower end of the contact holding plate 80 and facing the iron core 83a. And an iron plate 83c.

  The contact holding plate 80 is formed of a material that can withstand high voltages such as Teflon, and has a T-shape that branches to the left and right so that the tip portion faces the pair of contact portions 75a and 75b (see FIG. 20). ). The contact holding plate 80 protrudes further downward from the movable iron plate 83c, and a lower end portion is rotatably fixed to the bottom surface 72a of the case main body 72 of the cylindrical case 70 via a torsion spring 80a. The torsion spring 80a normally urges the tip of the contact holding plate 80 in a direction away from the solenoid S.

  The movable contact M is formed of a conductive plate material fixed to the tip of the contact holding plate 80 branched to the left and right, and is opposed to the contact portions 75a and 75b of the terminals Pa and Pb. Moreover, the movable contact M is normally separated from the contact portions 75a and 75b by the spring force of the torsion spring 80a, and the contact portions 75a and 75b are normally open contacts.

  One end of each of the lead wires 82 and 83 is connected to the end of the coil 83b, and the other end is drawn out from the outlet 76 and connected to the energization control circuit 84 (see FIG. 23). At this time, since the lead wires 82 and 83 are set apart from the contact portions 75a and 75b and the movable contact M in the cylindrical case 70, the resistance between the contact portions 75a and 75b and the movable contact M and the lead wires 82 and 83 is set. The voltage degree is improved.

  When the coil 83b is energized from the energization control circuit 84 via the lead wires 82 and 83, the movable iron plate 83c is attracted and moved to the iron core 83a by magnetic force, and is magnetically attached to the iron core 83a, and the solenoid S is activated (ON). ). Moreover, the contact holding plate 80 that moves integrally with the movable iron plate 83c by this suction movement is rotated in the direction of the arrow X shown in FIG. 22 so as to stand up against the spring force of the torsion spring 80a. Thereby, the movable contact M fixed to the tip of the contact holding plate 80 is brought into contact (contact) with the contact portions 75a and 75b, and the contact portions 75a and 75b are brought into conduction (short circuit).

[Connection of Switching Members SWa _ij and SWb _ij to Conductive Connection Pieces 58a _j and 58b _j ]
As shown in FIG. 8, the first switching member SWa _ij has one terminal Pa connected to the conductive connection piece 58a _j and the other terminal Pb connected to the inter-assembly conductive member Ca _j . They are connected to each other.

In addition, the first switching member SWb _i1 is an end where one terminal Pa in one row located at the most end of the resistance assemblies R _i , S _i , T _i is not attached to the conductive connection piece of the resistance element r _1. It is connected to the section F, the remaining first one terminal Pa of the switching member _{SWb ij} is connected to the conductive connecting piece _{58b j-one.} All the first switching members SWb _i1 are electrically connected to each other with the other terminal Pb connected to the inter-assembly conductive member Cb _j .

[Inter-Assembly Conductive Member Cb _j ]
Inter-assembly conductive members Ca _j [j = 1, 2, 3... M / 2] are arranged in the height direction of a large number of resistance assemblies R _i , S _i , T _i arranged in multiple stages in the vertical direction. It extends and has the other terminal Pb of the first switching member SWa _j electrically connected to each other. Similarly, the inter-assembly conductive member Cb _j [j = 1, 2, 3... M / 2] is the height of a large number of resistance assemblies R _i , S _i , T _i arranged in multiple stages up and down. It extends in the vertical direction (see FIG. 6), and the other terminal Pb of the first switching member SWb _i is electrically connected to each other. Incidentally, a large number of resistor assemblies R _i, S _i, of the resistive element r _m of T _i, the most on the edge by conductive connecting piece 58b _j is not attached end E An assembly between conductive members They are connected to Cb _{(m / 2) +1} and are electrically connected to each other (see FIG. 8).

[Relationships of resistance assemblies R _i , S _i , T _i ]
The connection relationship of the resistance assemblies R _i , S _i , T _i is as shown in FIG. 14 shows the resistance assemblies R _i , S _i , and T _i at the same time. Therefore, in FIG. 14, for convenience of illustration, the reference numerals are given with the minimum necessary number, and the detailed explanation is shown in FIG. explain. 14 and 15, the illustration of the insulating plates 67 and 68 shown in FIG. 8 is omitted for convenience of explanation.

The inter-assembly conductive member Cb _{(m / 2) +1} of the resistance assembly R _i is connected to the contact 86R ₁ of the main vacuum circuit breaker (VCB-M) 86 via the wiring 85R, and the resistance assembly S _i assembly between conductive members _{Cb (m / 2) +1} are connected to the contacts 86S ₁ of the main vacuum circuit breaker 86 is a high voltage switch through a wiring 85S, the resistance assembly _T assembly between conductive members of _i Cb _{(m / 2) +1} are connected to the contacts 86T ₁ of the main vacuum circuit breaker 86 through a wiring 85T. The contacts 86R ₂ , 86S ₂ , 86T ₂ of the vacuum circuit breaker 86 are connected to the R, S, T phase contacts 88R, 88S of the three-phase AC generator 88 which is a power source for testing via wirings 87R, 87S, 87T. 88T (see FIG. 5).

As described above, by providing the switching members SWa _ij , SWb _ij and the inter-assembly conductive members Ca _j , Cb _j , Cb _{(m / 2) +1} , only one main vacuum circuit breaker 86 is used as a high voltage switch. It becomes.

[Short-circuit means]
The dry load test apparatus 40 includes a short-circuit unit that switches and short-circuits several resistance elements r _j of the resistance assemblies R _i , S _i , T _i as appropriate. The short-circuit means includes short-circuit connection wires 89 and 89, short-circuit connection wires 90, 90 and 90, conductive plates (conductive connection members) 91, 91 and 91, and conductive plates connected to each other (conductive connection). Members) 92, 92, 92 are prepared.

[Energization control circuit 84]
FIG. 24 is a control circuit diagram of the switching member shown in FIG. A low voltage switch 93 for a low voltage load test, a high voltage switch 94 for a high voltage load test, and a high voltage switch 95 for a high voltage load test are connected to the energization control circuit 84, and a power source 96 connects a power switch 97. Connected through. The electric fan 50 is driven and controlled by an energization control circuit 84.

Next, the operation of the dry load test apparatus 40 having such a configuration will be described.
In the dry load test apparatus 40, first, the dry load test apparatus 40 is moved to the site where the load test is performed by the truck 30. In the present Example 1, it becomes a place where the three-phase AC generator 88 of the generator under test to be subjected to the voltage load test is installed.

As described above, the resistor main bodies 57R, 57S, and 57T provided in the resistor units 42, 43, and 44 of the first embodiment have 22-stage flat resistor assemblies R _i , S _i , and T _i , respectively. Have. Moreover, 16 rod-like resistance elements r _j of the resistance assemblies R _i , S _i , T _i are provided. Furthermore, eight switching members SWa _ij and SWb _ij of the above-described switching member rows SWa _i and SWb _i are provided.

Therefore, in correspondence as shown the coil 83b is a solenoid body of the switching members _{SWa ij} in S1~S8 in FIG. 24, in correspondence as shown the coil 83b is a solenoid body of the switching members _{SWb ij} in S9~S16 An example of the voltage load test will be described below.

  In the first embodiment, since the three-phase AC generator 88 is used as the generator under test to be subjected to the voltage load test, the three-phase AC generator 88 is used as the resistance main body 57R of the dry load test apparatus 40. , 57S, 57T will be described with reference to FIG.

[Low voltage load test]
25 is a schematic explanatory view showing a connection example of the resistance element of the resistance assembly shown in FIG. 14, FIG. 26 is a partially enlarged explanatory view of FIG. 25, and FIG. 27 is a diagram of the resistance assembly by the connection of FIG. It is resistance value explanatory drawing.

For example, when a low voltage load test of 400 V is performed, first, the inter-assembly conductive members Cb _{1 to} Cb _{(m / 2) +1} of the resistor main body 57R are conducted (short-circuited) by the conductive plate 91, and the resistance main body 57S is assembled. Conductive members Cb _{1 to} Cb _{(m / 2) +1} between the three-dimensional objects are conducted (short-circuited) by the conductive plate 91, and conductive members Cb _{1 to} Cb _{(m / 2) +1} between the assemblies of the resistor main body 57T are conducted by the conductive plate 91. (Short circuit).

As a result, the R, S, and T phases of the three-phase AC generator 88 include all the switching members SWb _ij and resistors of the conductive connection pieces 58b _{1 to} 58b _{(m / 2)} and the switching member rows SWb _{1 to} SWb _n. Inter-assembly conductive members Cb _{1 to} Cb _{(m / 2) +1 of} the main bodies 57R, 57S, and 57T, the conductive plates 91, the wirings 85R, 85S, and 85T, and the resistance assemblies R _i , S _i , via the vacuum circuit breaker 86, A resistance element r _{j of} T _i is connected.

On the other hand, the assembly between the conductive members _Ca 1 _{~Ca m / 2} of the resistor body 57R conduction conductive plate 92 is (short), a conductive inter-assembly of the resistance body 57S members _Ca 1 _{~Ca m / 2} with a conductive plate 92 Conduction (short circuit) is performed, and the inter-assembly conductive members Ca _{1 to} Cam _{/ 2} of the resistance main body 57T are conducted (short circuit) by the conductive plate 92. As a result, the resistance elements r _j of the resistance assemblies R _i , S _i , T _i constituting the resistance main bodies 57R, 57S, 57T are connected to the conductive connection pieces 58a _{1 to} 58a _{m / 2} , and the inter-assembly conductive member Ca _1. ~Ca _{m / 2,} are connected together to a neutral point where all the voltage via a switching member _{SWa ij} and the conductive plate 92 of the switching member columns _{SWa 1 ~SWa i (m / 2} ) becomes zero.

In this state, as shown in FIG. 27, the 16 resistance elements r _j of the resistance assemblies R _i , S _i , T _i are all connected in parallel. In addition, the R, S, and T phases of the three-phase AC generator 88 include resistance assemblies R _i , S _i , T _i (ie, low resistances) in which all resistance elements r _j are connected in parallel to reduce the load resistance value. Resistance element bodies 57R, 57S, and 57T having resistance values are connected.

In such a connection, the three-phase AC generator 88 is activated, while the power switch 97 is turned on to activate the energization control circuit 84. Thereafter, the low pressure switch 93 is turned on. Energization control circuit 84 by the ON operation, after first main ON the vacuum circuit breaker 86, by energizing all of the switching member _SWa ij, _{SWb ij} coil 83 b (S1 to S16), the switching member _{SWa ij,} make ON all SWb _ij.

As a result, the output (voltage, current) from the three-phase AC generator 88 is input to the resistance elements r _j of the resistance assemblies R _i , S _i , T _i , and the load test is started. As a result, the resistance element r _j of the resistance assembly R _i , S _i , T _i is energized, and the resistance element r _j generates heat.

At this time, the energization control circuit 84 operates the electric fans 50 of the resistance units 42, 43, 44 and blows cooling air from the electric fans 50 to the housing 52 of the resistance units 42, 43, 44. Then, the cooling air absorbs the heat generated in the resistive element r _j of resistor units 42, 43 and 44 as they flow around the heat radiation fins 60, after the resistive element r _j is cooled, the luggage compartment 33 The air is exhausted from an exhaust port (not shown) of the box 32 to be formed.

Incidentally, even in this case, the switching member _SWa ij of each stage, by the ON · OFF control of _{SWb ij,} resistor body 57R, 57S, load resistance value applied to three phase AC generator 88 from 57T for every predetermined time For example, the load test is performed with 25%, 50%, 75%, and 100%. In the first embodiment, since the flat resistance assemblies R _i , S _i , and T _i are provided in 22 stages, the ratio of the load resistance value applied to the three-phase AC generator 88 should be set more finely. You can also. For example, a load test can be performed every 5% or 10%.

[300V high voltage load test]
28 is a schematic explanatory view showing another connection example of the resistance element of the resistance assembly shown in FIG. 14, FIG. 29 is a partially enlarged explanatory view of FIG. 28, and FIG. 30 is a resistance set by connection of FIG. It is resistance value explanatory drawing of a solid | solid.

For example, when performing a high voltage load test of 3300V, first, the assembly between the conductive members Cb ₅ of the assembly between the conductive members Cb ₅ of the resistor body 57R resistor body 57S are short connected by connection lines 89, the resistance shorting by connecting assembly between conductive members Cb ₅ of the assembly between the conductive members Cb ₅ of the body 57S resistor body 57T in connecting line 89. Further, the inter-assembly conductive members Cb ₁ and Cb _{(m / 2) +1} of the resistor main bodies 57R, 57S, and 57T are connected by connection lines 90, 90, and 90, respectively, so as to be short-circuited (see FIG. 29).

In this state, as shown in FIG. 30, each of the 16 resistance elements r _j of each of the resistance assemblies R _i , S _i , T _i is a value in which half of the 8 resistance elements r _j are connected in parallel. Are connected in parallel, and one end side of the parallel resistors 8r, 8r is connected to a neutral point where the voltage becomes 0 via the switching member SWb _i5 and connection lines 89, 89. The

In addition, the R, S, and T phases of the three-phase AC generator 88 include inter-assembly conductive members Cb ₁ , Cb _{(m / 2) +1} of the resistance main bodies 57R, 57S, and 57T, which are wired 90, 90, 90, The wirings 85R, 85S, and 85T and the vacuum circuit breaker 86 are connected.

Accordingly, the R, S, and T phases of the three-phase AC generator 88 include resistance assemblies R _i , S _i , and T _i having resistors 8 r and 8 r that are connected in parallel and have a medium resistance value. That is, the resistance main bodies 57R, 57S, and 57T having medium resistance values are connected.

In such a connection, the three-phase AC generator 88 is activated, while the power switch 97 is turned on to activate the energization control circuit 84. Thereafter, the high voltage switch 94 is turned on. With this ON operation, the energization control circuit 84 first turns on the main vacuum circuit breaker 86, and then energizes only the coils 83b (S1, S5) of the switching members SWb _i1 and SWb _i5 , thereby switching the switching members SWb _i1 and SWb. Turn on _i5 . As a result, the output (voltage, current) from the three-phase AC generator 88 is input to the resistors 8r, 8r of the resistor assemblies R _i , S _i , T _i , and the load test is started. As a result, each resistance element r _j constituting the resistors 8r, 8r is energized, and the resistance element r _j generates heat.

At this time, the energization control circuit 84 operates the electric fans 50 of the resistance units 42, 43, 44 and blows cooling air from the electric fans 50 to the housing 52 of the resistance units 42, 43, 44. Then, the cooling air absorbs the heat generated in the resistive element r _j of resistor units 42, 43 and 44 as they flow around the heat radiation fins 60, after the resistive element r _j is cooled, the luggage compartment 33 The air is exhausted from an exhaust port (not shown) of the box 32 to be formed.

Even in this case, the ON / OFF control of the switching members SWb _i1 and SWb _i5 at each stage allows the load resistance value applied to the three-phase AC generator 88 from the resistor main bodies 57R, 57S, and 57T to be set at predetermined intervals. For example, the load test is performed with 25%, 50%, 75%, and 100%. In the first embodiment, since the flat resistance assemblies R _i , S _i , and T _i are provided in 22 stages, the ratio of the load resistance value applied to the three-phase AC generator 88 should be set more finely. You can also. For example, a load test can be performed every 5% or 10%.

[6600V high voltage load test]
31 is a schematic explanatory view showing still another connection example of the resistance element of the resistance assembly shown in FIG. 14, FIG. 32 is a partially enlarged explanatory view of FIG. 31, and FIG. 33 is a resistance due to the connection of FIG. It is resistance value explanatory drawing of an assembly.

For example, when a high voltage load test of 6600 V is performed, the inter-assembly conductive members Cb ₁ , Cb ₁ , Cb ₁ of the resistor bodies 57R, 57S, 57T are respectively connected by connection lines 89, 89, 89 and short-circuited. . Thereby, each resistance element r ₁ , r ₁ , r ₁ of each resistance assembly R _i , S _i , T _i is supplied with a voltage via the switching member, SWb _i1 , SWb _i1 , SWb _i1 and connection lines 89, 89. They are connected to each other at a neutral point that becomes zero.

Further, in the R, S, and T phases of the three-phase AC generator 88, the inter-assembly conductive member Cb _{(m / 2) +1} of the resistance main bodies 57R, 57S, and 57T is provided with wirings 85R, 85S, and 85T and a vacuum circuit breaker. 86 is connected. In this state, as shown in FIG. 33, each resistance assembly R _i , S _i , T _i has all the resistance elements r _j of the 16 resistance elements r _j connected in series, and has a resistance value of It becomes the state where it became high resistance.

Accordingly, the R, S, and T phases of the three-phase AC generator 88 have a high resistance value assembly R _i , S _i , T _i (ie, a high resistance value) in which all the resistance elements r _j are connected in series. Resistor bodies 57R, 57S, 57T) are connected.

In such a connection, the three-phase AC generator 88 is activated, while the power switch 97 is turned on to activate the energization control circuit 84. Thereafter, the high voltage switch 95 is turned on. Energization control circuit 84 by the ON operation, after first main ON the vacuum circuit breaker 86, only by energizing the coil 83b of the switching member _{SWb i1} (S1), causing ON the switching element _{SWb i1.} As a result, the output (voltage, current) from the three-phase AC generator 88 is energized to the resistance element r _j of the resistance assemblies R _i , S _i , T _i , and the resistance element r _j generates heat.

At this time, the energization control circuit 84 operates the electric fans 50 of the resistance units 42, 43, 44 and blows cooling air from the electric fans 50 to the housing 52 of the resistance units 42, 43, 44. Then, the cooling air absorbs the heat generated in the resistive element r _j of resistor units 42, 43 and 44 as they flow around the heat radiation fins 60, after the resistive element r _j is cooled, the luggage compartment 33 The air is exhausted from an exhaust port (not shown) of the box 32 to be formed.

Even in this case, the load resistance value applied to the three-phase AC generator 88 from the resistor main bodies 57R, 57S, 57T is set to, for example, 25% every predetermined time by controlling the ON / OFF of the switching member SWb _i1 at each stage. , 50%, 75%, and 100%, and load test is performed. In the first embodiment, since the flat resistance assemblies R _i , S _i , and T _i are provided in 22 stages, the ratio of the load resistance value applied to the three-phase AC generator 88 should be set more finely. You can also. For example, a load test can be performed every 5% or 10%.

  Such a load test is performed when the low voltage switch 93 for low voltage load test, the high voltage switch 94 for high voltage load test, and the high voltage switch 95 for high voltage load test are turned on. This is automatically performed by the energization control circuit 84 according to the program. This program can be stored in advance in a storage means such as a ROM (not shown) of the energization control circuit 84, or is recorded in a recording medium such as a hard disk, and the energization control circuit 84 is not shown at the start of the load test. It can also be read and used by the CPU.

[Spark prevention]
During the load test, a high voltage is applied to each of the switching members SWa _ij and SWb _ij that are turned on. Here, the solenoid S built in the switching members SWa _ij and SWb _ij , the contact portions 75 a and 75 b which are fixed contacts, and the movable contact M are sealed together with the inert gas G in the sealing case body 69. Therefore, even when this dry load test apparatus 40 is installed outdoors for a long period of time, it is possible to prevent dust from entering the sealed case body 69 and adhering to each contact or the like. Furthermore, the invasion of malignant gas can be more effectively prevented by filling the sealed case body 69 with the inert gas G. Thereby, even if it is installed outdoors for a long time, the occurrence of sparks in the switching members SWa _ij and SWb _ij can be suppressed.

In the first embodiment, the fixing portions 74 a and 74 b of the pair of terminals Pa and Pb are disposed on the upper surface 71 a of the upper case 71 of the sealing case body 69. Therefore, it is possible that the terminal Pa, Pb protrudes to the side of the sealing case 69 without forming the switching member _SWa ij, the _{SWb ij} compact. Moreover, it becomes difficult to contact each terminal Pa and Pb, and generation | occurrence | production of a short circuit etc. can be prevented.

  Furthermore, in the first embodiment, the outlet 76 of the pair of lead wires 82 and 83 connected to the solenoid S is provided on the upper surface 71a of the upper case 71 of the sealing case body 69. Therefore, a sufficient insulation distance between the lead wires 82 and 83 and the fixing portions 74a and 74b can be secured, and the lead wires 82 and 83 can withstand a certain level of high voltage.

  In the first embodiment, the upper surface 71a of the upper case 71 of the sealing case 69 has an insulating wall 77 that partitions the pair of terminals Pa and Pb, and is supported by the insulating wall 77 and a pair of terminals Pa, An insulating roof 78 covering the upper side of Pb is provided. Therefore, insulation between the pair of terminals Pa and Pb can be ensured and contact with the terminals Pa and Pb can be more effectively prevented.

Furthermore, in the first embodiment, the first switching members SWa _ij and SWb _ij are arranged in the direction in which the first switching member rows SWa _i and SWb _i are arranged so that the mounting support portions 73 do not interfere with each other. That is, the attachment support portion 73 is fixed in a tilted state with respect to the horizontal direction and the vertical direction of the resistance assemblies R _i , S _i , T _i . As a result, the switching members SWa _ij and SWb _ij can be arranged close to each other, and the resistor bodies 57R, 57S, and 57T can be made compact.

[Modification]
In the first embodiment described above, when the low voltage switch 93 for the low voltage load test, the high voltage switch 94 for the high voltage load test, and the high voltage switch 95 for the high voltage load test are turned on, the load inspection is performed according to the program. Although it did, it is not necessarily limited to this.

For example, as shown in FIG. 34, corresponding to the coil 83b of the switching member _{SWb ij} indicated by the coils 83b and S9~S16 switching member _{SWa ij} shown in S1 to S8, the switching member _{SWa ij} of each stage, the switch SW1～SW16 for oN · OFF operation of the SWb _ij provided, may be adapted to the respective control of energization of the coil 83b shown in S1~S16 by the switch SW1～SW16. The vacuum circuit breaker 86 can also be turned ON / OFF with the switch 98.

Further, in the first embodiment, the resistor assemblies _{R i,} S _{i, T} i of the conductive connecting piece _{58a 1 ~58a (m / 2)} , 58b 1 ~58b (m / 2) ( the end of the resistive element _{r j} The switching members SWa _ij and SWb _ij are connected to all of the connection parts), but are not necessarily limited to this. For example, in the case of the present embodiment, the switching member may be provided only in Cb ₁ , Cb ₅ , Cb _{(m / 2) +1} (m = 16, so Cb ₉ ).

In the first embodiment described above, the resistance assembly R _i is used in advance using the connection wires 89 and 90, the conductive plates 91 and 92, and the like before the low voltage load test, the 3300V voltage load test, and the 6600 high voltage load test. , S _i , T _i of some of the resistance elements r _j are connected (short-circuited) manually, but are not necessarily limited to this.

For example, as shown in FIG. 35, three conductive plates (short-circuit means) 92 connected in series with connection lines (short-circuit means) 99, 99 are provided, and each of the conductive plates 92 is connected to the resistor bodies 57R, 57S, 57T. The inter-assembly conductive member Ca _j is connected via a second switching member SWc _j [j = 1, 2, 3... M / 2] as a short-circuit means, and the three conductive plates 91 are connected to the resistor main body 57R. , 57S, 57T are connected to the inter-assembly conductive member Cb _j via the second switching member SWd _j [j = 1, 2, 3... (M / 2) +1] which is a short-circuit means (for details, see FIG. (See FIG. 36).

The second switching members SWc _j and SWd _{j that} are short-circuit means use the same magnetic switch (configuration shown in FIGS. 16 to 23) as the first switching members SWa _ij and SWd _ij that are short-circuit means. Can do. In addition, the first switching members SWa _ij and SWd _ij are provided for each of the resistance assemblies R _i , S _i , and T _i and have multiple stages. However, the second switching members SWc _j and SWd _j need only be arranged in one row because they can short-circuit the inter-assembly conductive member Ca _j and the inter-assembly conductive member Cb _j .

Also, the inter-assembly conductive members Cb ₁ , Cb ₁ , Cb _{1 of} the resistor main bodies 57R, 57S, 57T are connected to each other by a vacuum circuit breaker (VCB) 100 that is a high voltage switch so that they can be electrically connected (short-circuited). The inter-assembly conductive members Cb ₅ , Cb ₅ , and Cb _{5 of} 57R, 57S, and 57T are connected to each other by a vacuum circuit breaker (VCB) 101 that is a high voltage switch so that they can be electrically connected (short-circuited), and the resistor bodies 57R and 57S , 57T inter-assembly conductive members Cb ₁ , Cb ₁ , Cb ₁ and Cb _{(m / 2) +1} , Cb _{(m / 2) +1} , Cb _{(m / 2) +1} (in the second embodiment, m / 2 = Therefore, Cb _{(m / 2) + 1} = Cb ₉ ) is connected by a vacuum circuit breaker (VCB) 102 which is a high voltage switch.

Further, as shown in FIG. 37, the coil 83b of the second switching member SWc _j and S17～S24, when the coil 83b of the second switching member SWd _j and S25～S33, also these solenoids S17~S33 The operation is controlled by the energization control circuit 84. 24 that are the same as those in FIG. 24 are denoted by the same reference numerals as those in FIG. 24, and description thereof is omitted.

[Low voltage load test]
In such a connection, when a low voltage load test of 400 V, for example, is performed, first, the three-phase AC generator 88 is activated, and the power switch 97 is turned on to activate the energization control circuit 84.

Thereafter, the low pressure switch 93 is turned on. By this ON operation, the energization control circuit 84 first turns on the main vacuum circuit breaker 86 and then switches the switching members SWa _ij of the resistance assemblies R _i , S _i , T _i constituting the resistance bodies 57R, 57S, 57T. by energizing all of the coils 83 b (S1 to S8), along with turning oN the switching element _{SWa ij,} resistor body 57R, 57S, resistor assemblies _R i constituting the _57T, S i, of the switching member SWc _j of _{T i} by energizing all of the coil 83b (S17~S24), causes oN all the switching members SWc _j.

Thereby, the resistance elements r _j of the resistance assemblies R _i , S _i , T _i constituting the resistance main bodies 57R, 57S, 57T are connected to the conductive connection pieces 58a _{1 to} 58a _{(m / 2)} and all the switching members SWa. _{i1 ~SWa i (m / 2)} , the assembly between the conductive members _Ca 1 _{~Ca m / 2,} each other connected to the neutral point at which voltage becomes 0 through the switching member _SWc 1 _{~SWc m / 2} and the conductive plate 92 Is done.

And this with electric control circuit 84, the resistor body 57R, 57S, resistor assemblies _R i constituting the _57T, S i, by energizing all the _{T i} of the switching member _{SWb ij} coil 83 b (S9 to S16) , energizing all the switching members _{SWb ij} causes turned oN, the resistor body 57R, 57S, resistor assemblies _R i constituting the _57T, S i, for all coil 83b of the switching member SWd _j of _{T i (S25~S33)} Then, all the switching members SWd _j are turned on.

As a result, the R, S, and T phases of the three-phase AC generator 88 include all of the conductive connection pieces 58b _{1 to} 58b _{(m / 2) -1} and the switching member rows SWb _{1 to} SWb _{(m / 2)} . Switching member SWb _ij (SWb _{i1 to} SWb _{i (m / 2)} ), inter-assembly conductive members Cb _{1 to} Cb _{(m / 2) +1 of} the resistor bodies 57R, 57S, 57T, conductive plate 91, wirings 85R, 85S, The resistance elements r _{j of} the resistance assemblies R _i , S _i , T _i are connected via the 85T and the vacuum circuit breaker 86.

In this state, as shown in FIG. 27, the 16 resistance elements r _j of the resistance assemblies R _i , S _i , T _i are all connected in parallel. In addition, the R, S, and T phases of the three-phase AC generator 88 include resistance assemblies R _i , S _i , T _i (ie, low resistances) in which all resistance elements r _j are connected in parallel to reduce the load resistance value. Resistance main bodies 57R, 57S, and 57T having resistance values are connected. As a result, the output (voltage, current) from the three-phase AC generator 88 is input to the resistance elements r _j of the resistance assemblies R _i , S _i , T _i , and the load test is started. As a result, the resistance element r _j of the resistance assembly R _i , S _i , T _i is energized, and the resistance element r _j generates heat.

At this time, the energization control circuit 84 operates the electric fans 50 of the resistance units 42, 43, 44 and blows cooling air from the electric fans 50 to the housing 52 of the resistance units 42, 43, 44. Then, the cooling air absorbs the heat generated in the resistive element r _j of resistor units 42, 43 and 44 as they flow around the heat radiation fins 60, after the resistive element r _j is cooled, the luggage compartment 33 The air is exhausted from an exhaust port (not shown) of the box 32 to be formed.

Incidentally, even in this case, the switching member _SWa ij of each stage, by the ON · OFF control of _{SWb ij,} resistor body 57R, 57S, load resistance value applied to three phase AC generator 88 from 57T for every predetermined time For example, the load test is performed with 25%, 50%, 75%, and 100%. In this embodiment, since the flat resistance assemblies R _i , S _i , and T _i are provided in 22 stages, the ratio of the load resistance value applied to the three-phase AC generator 88 may be set more finely. it can. For example, a load test can be performed every 5% or 10%.

[At 3300V high voltage load test]
For example, when a high voltage load test of 3300 V is performed, the three-phase AC generator 88 is operated, while the power switch 97 is turned on to operate the energization control circuit 84. Thereafter, the high voltage switch 94 is turned on. With this ON operation, the energization control circuit 84 first turns on the main vacuum circuit breaker 86 and the vacuum circuit breaker 101, and then the resistance assemblies R _i , S _i , T _i constituting the resistance bodies 57R, 57S, 57T. by energizing the switching member _{SWb ij} coil 83b (S5), causing oN the switching element _{SWb i5.} As a result, the resistance elements r _j of the resistance assemblies R _i , S _i , T _i constituting the resistance bodies 57R, 57S, 57T include the conductive connection pieces 58b ₅ , the switching members SWb _i5 , and the inter-assembly conductive members Cb _5. And a neutral point where the voltage is 0 through the vacuum circuit breaker 101.

That is, in this state, as shown in FIG. 30, each of the sixteen resistance elements r _j of each resistance assembly R _i , S _i , T _i is connected in parallel to the half of the eight resistance elements r _j. Are connected in parallel, and one end of the parallel resistors 8r, 8r is connected to the conductive connection piece 58b ₅ , the switching member SWb _i5 , the inter-assembly conductive member Cb ₅ and the vacuum circuit breaker. The neutral points at which the voltage is 0 are connected to each other via 101.

And this with electric control circuit 84, together with the turning ON of the vacuum circuit breaker 102, the resistor body 57R, 57S, resistor assemblies _R i constituting the _57T, S i, _{T i} of the switching member _{SWb ij} coil 83 b (S9 ) To turn on the switching member SWb _i1 of each resistance assembly R _i , S _i , T _i .

Accordingly, the R, S, and T phases of the three-phase AC generator 88 include the conductive connection pieces 58b _{1 to} 58b _{(m / 2)} , the switching member SWb _{i1 of} the switching member row SWb _{1 to} SWb _n , and the resistance body 57R. , 57S, 57T, the inter-assembly conductive members Cb ₁ , Cb _{(m / 2) +1} (= Cb ₉ ), the vacuum circuit breaker 102, the conductive plate 91, the wires 85R, 85S, 85T, and the resistance through the vacuum circuit breaker 86. The resistance elements r _{j of the} assemblies R _i , S _i , T _i are connected.

As a result, the output (voltage, current) from the three-phase AC generator 88 is input to the resistors 8r, 8r of the resistor assemblies R _i , S _i , T _i , and the load test is started. As a result, each resistance element r _j constituting the resistors 8r, 8r is energized, and the resistance element r _j generates heat.

Incidentally, even in this case, the switching member _SWa ij of each stage, by the ON · OFF control of _{SWb ij,} resistor body 57R, 57S, load resistance value applied to three phase AC generator 88 from 57T for every predetermined time For example, the load test is performed with 25%, 50%, 75%, and 100%. In this embodiment, since the flat resistance assemblies R _i , S _i , and T _i are provided in 22 stages, the ratio of the load resistance value applied to the three-phase AC generator 88 may be set more finely. it can. For example, a load test can be performed every 5% or 10%.

[6600V high voltage load test]
For example, when a high voltage load test of 6600 V is performed, the three-phase AC generator 88 is activated, while the power switch 97 is turned on to activate the energization control circuit 84. Thereafter, the high voltage switch 95 is turned on. With this ON operation, the energization control circuit 84 first turns on the main vacuum circuit breaker 86 and the vacuum circuit breaker 100, and then the resistance assemblies R _i , S _i , T _i constituting the resistance bodies 57R, 57S, 57T. by energizing the switching member _{SWb ij} coil 83b (S1), causing oN the switching element _{SWb i1.}

As a result, the resistance elements r _j of the resistance assemblies R _i , S _i , T _i constituting the resistance bodies 57R, 57S, 57T include the conductive connection pieces 58b ₁ , the switching members SWb _i1 , and the inter-assembly conductive members Cb _1. And the neutral point where the voltage is zero through the vacuum circuit breaker 100.

Further, in the R, S, and T phases of the three-phase AC generator 88, the inter-assembly conductive members Cb _{(m / 2) +1} of the resistance main bodies 57R, 57S, and 57T are connected to the wirings 90, 90, 90, the wiring 85R, 85S, 85T and the vacuum circuit breaker 86 are connected.

In this state, as shown in FIG. 33, each resistance assembly R _i , S _i , T _i has all the resistance elements r _j of the 16 resistance elements r _j connected in series, and has a resistance value of It becomes the state where it became high resistance. Accordingly, the R, S, and T phases of the three-phase AC generator 88 have a high resistance value assembly R _i , S _i , T _i (ie, a high resistance value) in which all the resistance elements r _j are connected in series. Resistor bodies 57R, 57S, 57T) are connected.

By such a control operation by the energization control circuit 84, the output (voltage, current) from the three-phase AC generator 88 is energized to the resistance element r _j of the resistance assembly R _i , S _i , T _i , and the resistance element _{r 1} generates heat.

At this time, the energization control circuit 84 operates the electric fans 50 of the resistance units 42, 43, 44 and blows cooling air from the electric fans 50 to the housing 52 of the resistance units 42, 43, 44. Then, the cooling air absorbs the heat generated in the resistive element r _j of resistor units 42, 43 and 44 as they flow around the heat radiation fins 60, after the resistive element r _j is cooled, the luggage compartment 33 The air is exhausted from an exhaust port (not shown) of the box 32 to be formed.

Incidentally, even in this case, the switching member _SWa ij of each stage, by the ON · OFF control of _{SWb ij,} resistor body 57R, 57S, load resistance value applied to three phase AC generator 88 from 57T for every predetermined time For example, the load test is performed with 25%, 50%, 75%, and 100%. In this embodiment, since the flat resistance assemblies R _i , S _i , and T _i are provided in 22 stages, the ratio of the load resistance value applied to the three-phase AC generator 88 may be set more finely. it can. For example, a load test can be performed every 5% or 10%.

  Such a load test is performed when the low voltage switch 93 for low voltage load test, the high voltage switch 94 for high voltage load test, and the high voltage switch 95 for high voltage load test are turned on. This is automatically performed by the energization control circuit 84 according to the program. This program can be stored in advance in a storage means such as a ROM (not shown) of the energization control circuit 84, or is recorded in a recording medium such as a hard disk, and the energization control circuit 84 is not shown at the start of the load inspection. It can also be read and used by the CPU.

In this way, the energization control circuit 84 simply turns on the low voltage switch 93, the high voltage switch 94, and the high voltage switch 95, and the resistance assemblies R _i , S _i , T _i of the resistance main bodies 57R, 57S, 57T. The resistance value is automatically set and the load test is automatically performed. As a result, it is possible to easily and quickly perform optimal (accurate) switching of complicated switches. Further, according to the second embodiment, a vacuum circuit breaker is provided for each of the multiple stages (22 stages in the first embodiment) of the resistance assemblies R _i , S _i , T _i constituting the resistor main bodies 57R, 57S, 57T. There is no need, and only three vacuum circuit breakers indicated by 100, 101 and 102 have been added. Therefore, even if automated, the apparatus does not increase in size and the cost is hardly increased.

[Modification 1]
Also in the second embodiment, when the low voltage switch 93 for the low voltage load test, the high voltage switch 94 for the high voltage load test, and the high voltage switch 95 for the high voltage load test are turned on, the load inspection is performed according to the program. However, it is not necessarily limited to this.

For example, as shown in FIG. 38, corresponding to the coil 83b of the switching member _{SWb ij} indicated by the coils 83b and S9~S16 switching member _{SWa ij} shown in S1 to S8, the switching member _{SWa ij} of each stage, the switch SW1～SW16 for oN · OFF operation of the SWb _ij provided, may be adapted to the respective current control to the coil 83b shown in S1~S16 by the switch SW1～SW16. The vacuum circuit breakers 86, 100, 101, 102 can also be turned on and off with the switches 98, 98a, 98b, 98c.

[Modification 2]
Further, the vacuum circuit breaker 102 is not always necessary. That is, when the high-voltage switch 94 is turned on, the vacuum circuit breaker 102 can be omitted if the energization control circuit 84 turns on the switching members SWd ₁ and SWd _{(m / 2) +1} (= SWd ₉ ). In this case, even if it is automated, the vacuum circuit breaker can be reduced by one from the embodiment described above, so that the cost can be further reduced and the size can be reduced.

In Example 1 and Example 2 demonstrated above, the example of the dry-type load test apparatus of the type used for a three-phase alternating current generator was shown, However, This invention is not necessarily limited to this. For example, by using only one of the resistance assemblies R _i , S _i , T _i of the resistor main bodies 57R, 57S, 57T alone, an electric load test of a power source to be tested such as a generator or a battery is performed. Also good.

In the first embodiment and the second embodiment described above, the resistance units 42, 43, 44 provided separately are arranged in parallel, and the resistance assemblies R of the resistance main bodies 57R, 57S, 57T are provided in the respective resistance units 42, 43, 44. _{Although i} , S _i , and T _i are provided, the configuration is not necessarily limited thereto.

For example, when the voltage of the power supply under test is relatively small even at a high voltage, the number of stages of the resistance assemblies R _i , S _i , T _i is reduced to, for example, 2 to 3 stages, and FIGS. As shown in (1), the resistance units 42, 43, and 44 provided separately may be assembled vertically to form one dry load test apparatus 300. In FIGS. 39 and 40, the number of stages of the resistance assemblies R _i , S _i , and T _i is one for convenience of illustration, but actually, the number is two to three.

In this case, since the resistance units 42, 43, and 44 have metal box-shaped frames 301, 301, and 301, respectively, it is necessary to dispose the insulating member 302 between the resistance units 42, 43, and 44. It is necessary to provide a certain insulation distance between 301 and the resistance assemblies R _i , S _i , T _i . For this reason, the space | interval between resistance main bodies 57R, 57S, and 57T becomes large, and there exists a tendency for the height of the dry-type load test apparatus 300 to become high, and is not desirable.

Therefore, as shown in FIG. 41A, FIG. 42, and FIG. 43, a dry load test apparatus 400 incorporating only the resistance assemblies R _i , S _i , T _i of the resistance main bodies 57R, 57S, 57T may be used. The dry load test apparatus 400 has a rectangular parallelepiped (box-like) metal (for example, iron) frame 401 having four lateral sides and two upper and lower surfaces open, and the lateral opening of the frame 401 is closed. Insulating plates 402 to 405 are formed. The resistance assemblies R _i , S _i , T _i of the resistor main bodies 57R, 57S, 57T arranged above and below are fixed between the insulating plates 402, 404.

In this case, since there is one frame 401, the distance between the resistor bodies 57R, 57S, and 57T can be made smaller than that of FIGS. As a result, the dry load test apparatus 400 can be much smaller in height than the dry load test apparatus 300. In the case of this example as well, the number of stages of the resistance assemblies R _i , S _i , T _i is set to one for convenience of illustration, but actually, the number of stages is two to three.

  Further, the insulating plates 403 and 405 are removed from the side surface of the frame 401, two opposing side surfaces located between the insulating plates 402 and 404 of the frame 401 are opened, and the electric fan 50 is installed in one of the openings as shown in FIG. 41B. It is good also as a structure which closed the upper and lower openings of the flame | frame 401 while attaching. In this case, the cooling air from the electric fan 50 flows into the frame 401 from the opening on the side surface of the frame 401 as indicated by the arrow 401a, cools the internal resistance element, and then opens on the other side surface. Exhausted from. With this configuration, the height of the dry load test apparatus 400 can be further reduced, so that the dry load test apparatus 400 can be incorporated into a small truck. Also, depending on the installation location, it can be easily installed in a place where the height cannot be taken. The electric fan 50 is attached to the frame 41, and the cooling air generated from the electric fan 50 flows into the frame 401 through the insulating hood 53 through the opening on the side surface of the frame 401 as indicated by the arrow 401a.

[Modification]
In the first to third embodiments, the R-phase resistance unit 42, the S-phase resistance unit 43, and the T-phase resistance unit 44 are provided one by one. However, the present invention is not limited to this. is not. For example, the resistive element _{r i} of the resistor units 42, 43 and 44 as shown in FIG. 31-33 as well as in series connection for 6600 V, shows a resistor units 42, 43 and 44 of the series connection in Figure 44A As shown in FIG. 44B, two sets of resistance units 42 and 42, two sets of resistance units 43 and 43, and two sets of resistance units 44 and 44 are connected in series, respectively. By configuring, a load test of 13200V can be performed. In addition, this connection example is an example and the voltage which can perform a load test can be made high by increasing the number of resistance units 42,43,44.

  In the first embodiment, the dry load test apparatus 40 provided with the resistance units 42, 43, and 44 is mounted on the truck 30, and the electric load test is performed on the dry load test apparatus 40 using the truck 30. Although the electrical load test is performed with the dry load test apparatus 40 mounted on the truck 30 after being transported to the site, the present invention is not necessarily limited thereto.

  For example, as shown in FIG. 45, resistance units 42, 43, and 44 corresponding to the R phase, S phase, and T phase are detachably loaded on the loading platform of the truck 30. Then, the resistance units 42, 43, and 44 are transported to the site where the electric load test is performed by the truck 30, removed from the truck 30 at this site, and lowered from the truck 30. Thereafter, the resistance units 42, 43, and 44 are installed at the site in the configuration as in the first embodiment, and an electric load test of a power source such as a generator at the site is started.

  Accordingly, since the truck 30 does not need to be left on site during the electrical load test, the other resistance units 42, 43, 44 are transported to another site or the other resistance units 42, 43, 44 are recovered. Can be used. As a result, the track 30 can be used effectively and effectively.

1 is a plan view of a truck on which a dry load test apparatus according to the present invention is mounted. It is a side view of FIG. 1A. It is the schematic plan view which fractured | ruptured the box shown to FIG. 1A and FIG. 1B, and showed the dry-type load test apparatus inside. It is the schematic side view which looked at the dry-type load test apparatus of FIG. 2 from the arrow A direction. It is the schematic side view which looked at the dry-type load test apparatus of FIG. 2 from the arrow B direction. It is a schematic explanatory drawing which shows an example of the dry-type load test apparatus of FIG. 1A-FIG. 4, and the power supply for test. It is the fragmentary perspective view which expanded a part of FIG. 3 and was seen from the diagonal. FIG. 5 is a side view of the resistance unit shown with a part of the electric fan of FIGS. 3 and 4 cut away. It is explanatory drawing of the insulating board of FIG. 7A. It is an expanded sectional view showing the relation between the resistance unit of Drawing 7A, and a switching member. It is a circuit diagram of the dry-type load test apparatus of FIGS. FIG. 10 is a partially enlarged explanatory view of FIG. 9. FIG. 9 is an explanatory diagram illustrating a part of the resistance element illustrated in FIG. 8 in detail while being broken. It is explanatory drawing which shows the edge part enlarged structure of the resistive element of FIG. 11A. It is explanatory drawing which shows the other example of the edge part holding structure of the resistive element of FIG. 11A. It is explanatory drawing which shows the arrangement | positioning relationship of the switching member seen from the arrow A direction of FIG. It is explanatory drawing which shows the arrangement | positioning relationship between the switching member seen from the arrow B direction of FIG. It is explanatory drawing which shows the relationship between the resistance assembly of FIG. 9, and the member which short-circuits the resistance element of the resistance assembly. FIG. 15 is a partially enlarged explanatory view showing a relationship between the resistance assembly of FIG. 14 and a switching member. It is a perspective view which shows the external appearance of the switching member shown in FIG. It is a front view of the switching member of FIG. It is a side view of the switching member of FIG. It is a top view of the switching member of FIG. It is a longitudinal cross-sectional view which shows the internal structure of the switching member of FIG. It is a longitudinal cross-sectional view when the internal structure shown in FIG. 20 is seen from the side. It is action | operation explanatory drawing of the switching member of FIG. FIG. 17 is a schematic circuit diagram for controlling the operation of the switching member shown in FIG. 16. It is a control circuit diagram of the switching member shown in FIG. It is a schematic explanatory drawing which shows the example of a connection of the resistance element of the resistance assembly shown in FIG. FIG. 26 is a partially enlarged explanatory view of FIG. 25. It is resistance value explanatory drawing of the resistance assembly by the connection of FIG. It is a schematic explanatory drawing which shows the other example of a connection of the resistance element of the resistance assembly shown in FIG. FIG. 29 is a partially enlarged explanatory view of FIG. 28. It is resistance value explanatory drawing of the resistance assembly by the connection of FIG. FIG. 15 is a schematic explanatory diagram illustrating still another connection example of the resistance element of the resistance assembly illustrated in FIG. 14. FIG. 32 is a partially enlarged explanatory view of FIG. 31. It is resistance value explanatory drawing of the resistance assembly by the connection of FIG. It is explanatory drawing which shows the other example of the control circuit of the switching member shown in FIG. It is a schematic circuit diagram of the dry-type load test apparatus concerning Example 2 of this invention. FIG. 36 is a partially enlarged explanatory view of FIG. 35. It is a control circuit diagram of the switching member of FIG. It is explanatory drawing which shows the other example of the control circuit diagram of the switching member of FIG. It is explanatory drawing of another dry-type load test apparatus. FIG. 40 is a right side view of FIG. 39. It is the side view which fractured | ruptured and showed a part of dry-type load testing apparatus concerning Example 4. FIG. FIG. 41B is a side view showing a modification of FIG. 41A partially broken away. FIG. 41B is a right side view of the dry load test apparatus of FIG. 41A. FIG. 43 is a plan view of FIG. 42. It is explanatory drawing which shows typically the example of a connection of the resistance unit of this invention. It is explanatory drawing which shows the connection state of the resistance unit of FIG. 44A. It is a top view which shows the other example of the truck carrying the dry-type load test apparatus concerning this invention.

Explanation of symbols

40 dry load test apparatus r _i resistive elements 57R resistor body SWa _{ij, SWb ij} switching member Pa, Pb terminals 75a, 75b fixed contact (contact portion)
M movable contact S drive means (solenoid)
G Inert gas 69 Sealed case body Ca _j , Cb _j Conductive member between assemblies 86 High voltage switch (vacuum circuit breaker)
88 Power supply for test (three-phase AC generator)

Claims (5)

A plurality of resistor assemblies in which a plurality of elongated resistance elements are arranged in parallel in the horizontal direction and connected in series, and the plurality of resistor assemblies are arranged in parallel in the vertical direction with the vertical direction. A resistance main body for a high-voltage load test having a plurality of resistance element rows composed of a plurality of the resistance elements arranged in a row,
A plurality of switching member rows composed of a plurality of switching members having one terminal connected to one end of each of the resistor elements of the plurality of resistor element rows;
A plurality of inter-assembly conductive members to which the other terminal of each switching member of the plurality of switching member rows is connected;
In a dry load test apparatus comprising: one high voltage switch for connecting some of the plurality of inter-assembly conductive members to a power source for testing;
The switching member includes a pair of fixed contacts connected to each of the pair of terminals, a movable contact that conducts the pair of fixed contacts, a driving unit that drives the movable contact, the fixed contact, the movable contact, A dry load test apparatus characterized by comprising a sealed case body containing the drive means and filled with an inert gas. In the dry load test apparatus according to claim 1,
The dry load test apparatus, wherein the switching member has the pair of terminals arranged on an upper surface of the sealed case body. In the dry load test apparatus according to claim 2,
The dry load test apparatus according to claim 1, wherein the switching member is provided with a pair of lead wire outlets connected to the driving means on an upper surface of the sealing case body. In the dry load test apparatus according to claim 2 or 3,
The switching member has, on the upper surface of the sealing case body, an insulating wall that partitions the pair of terminals, and an insulating roof that is supported by the insulating wall and covers the top of the pair of terminals. Dry load test equipment. In the dry-type load test apparatus as described in any one of Claims 1-4,
The sealed case body includes a cylindrical case main body, and a pair of mounting support portions that protrude laterally from a lower end portion of the case main body and that are disposed at positions facing each other across the center of the case main body. Have
The plurality of switching members are fixed to the side of the resistor body in a state where the attachment support portions are inclined with respect to the arrangement direction of the plurality of switching member rows so that the attachment support portions do not interfere with each other. A dry-type load test apparatus.

Images