JP2007166744A - Jig for connection - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jig for connection that can short-circuit hot line side connecting portions in respective phases of a test plug in a lump and easily measure a short-circuit current. <P>SOLUTION: The jig 31 for connection is placed between a plurality of power supply-side conductors connected to respective phases of a power supply and the same number of load-side conductors connected to respective phases of a load, and thereby electrically interrupts the power supply-side conductors and the load-side conductors. The jig is attached to the test plug 1. The test plug includes: a plurality of hot line-side conductors brought into contact with the power supply-side conductors when the jig is inserted; and the same number of non-hot line-side conductors 9a to 9d brought into contact with the load-side conductors. The jig short-circuits individual phases to one another through hot line-side connecting portions 13a to 13d that are ends of the individual hot line-side conductors. The jig includes a measuring portion with which the clamp portion 22a of a clamp meter 22 for measuring a short-circuit current at that time can be engaged. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a connection jig, and is particularly useful when applied to a test plug that is fitted to a test terminal provided on a switchboard or the like and performs a load test or the like as various electric devices such as an ammeter or a relay.

  Some switchboards are provided with a test terminal for performing a calibration or a test (hereinafter referred to as a test or the like) in a state where a load, which is various electric devices such as an ammeter or a relay, is disconnected from the power supply side. That is, when performing a test or the like, first, the load is disconnected from the power supply side by inserting a test plug into the test terminal. In this state, a test current is supplied to the load via the test plug by the inspection power source.

  This type of test plug is shown in FIGS. 12 and 13 together with a switchboard and test terminals. As described above, the test plug 1 shown in both figures is used by being inserted into the test terminal 3 provided on the switchboard 2 when performing a load test or the like. Therefore, FIG. 12 shows a state before the test (before the test plug 1 is inserted), and FIG. 13 shows a state at the time of the test (after the test plug 1 is inserted).

  As shown in both figures, the test terminal 3 includes a plurality of power supply side conductors 5 connected to each phase and ground phase of the power supply 4, and the same number of load side conductors 7 connected to each phase of the load 6, respectively. In normal operation (during non-testing), each power supply side conductor 5 and each corresponding load side conductor 7 are in contact with each other to ensure electrical continuity between the power supply 4 and the load 6. ing. Here, the power-side conductor 5 and the load-side conductor 7 are formed of an elastic member, and maintain electrical contact with each other by their respective elastic forces.

  On the other hand, as shown in FIG. 13, the test plug 1 is inserted between a power-side conductor 5 and a load-side conductor 7 that are elastically deformed, thereby electrically connecting the power-side conductor 5 and the load-side conductor 7 respectively. And a plurality of hot-wire-side conductors 8 that are in contact with the power-source-side conductors 5 and the same number of non-hot-wire-side conductors 9 that are in contact with the load-side conductors 7, respectively. Here, each of the live wire side conductors 8 and the non-live wire side conductors 9 has rear end portions, which are the end portions on the test terminal 3 side, disposed on the opposing surfaces of the insulating member 10, and the center portion is A tip portion that is supported by the insulating support 11 and is opposite to the test terminal 3 protrudes forward. In the state where the test plug 1 is inserted into the test terminal 3 (the state shown in FIG. 13), the tips of the live wire side conductors 8 and the non-live wire side conductors 9 protrude forward from the surface of the switchboard 2. As a result, it is possible to connect an external circuit separately to the tips of each live wire side conductor 8 and non-live wire side conductor 9.

  More specifically, the tip of the non-hot-wire side conductor 9 is an axial non-hot-wire side connection portion 12, and the tip of the live-wire-side conductor 8 is a hot-wire side connection portion surrounding the outer periphery of the non-hot-wire side connection portion 12. In this state, the non-hot-wire side connection portion 12 protrudes further forward. A nut 14 is screwed to the tip of the non-hot-wire side connection portion 12, a nut 15 is screwed to the outer periphery of the live-wire side conductor 8, and a tip portion of the hot-wire side conductor 8 (between the nuts 14 and 15). A nut 16 is screwed onto the outer periphery of the non-hot wire side connection portion 12 in FIG. The inspection power source 17 is connected between the non-hot-wire side connection portion 12 of the phase to be tested and the non-hot-wire side connection portion 12 of the ground phase and supplies a predetermined current to the predetermined load 6.

  Here, it is necessary to avoid a situation in which the hot wire side conductor 8 of each phase is opened. Since the power source 4 is actually connected via a current meter, a high voltage is generated between the phases when the secondary side of the current meter is opened, in order to prevent this. Therefore, prior to inserting the test plug 1 into the test terminal 3, the hot wire side connection portions 13 of each phase are connected by the short-circuit piece 18 and are short-circuited.

  The live side conductor 8 and the non-live side conductor 9 of the test plug 1 and the power source side conductor 5 and the load side conductor 7 of the test terminal 3 are each phase (three phases of R, S, T) and the ground phase. 4 are provided so as to correspond to each of them, but since these structures are the same, only one is shown in FIGS. Similarly, the load 6 is also provided for each of the R-phase, S-phase, and T-phase, but only one load is shown in FIGS.

  FIG. 14 is a circuit diagram showing an equivalent circuit when performing the above-described test and the like. As shown in the figure, power supply-side conductors 5a, 5b, 5c, and 5d of each phase of the test terminal 3 and the ground phase are connected to the buses U, V, and W through current meters CT1, CT2, and CT3. is there. Further, by inserting the test plug 1 into the test terminal 3, the power supply side conductors 5a, 5b, 5c, 5d and the live line side conductors 8a, 8b, 8c, 8d (live line side connection sites 13a, 13b, 13c, 13d) And the load side conductors 7a, 7b, 7c, 7d and the non-live line side conductors 9a, 9b, 9c, 9d (non-live line side connection sites 12a, 12b, 12c, 12d) are brought into contact. Prior to inserting the test plug 1 into the test terminal 3, the live wire side conductors 8a, 8b, 8c, 8d of each phase are short-circuited by the short-circuit piece 18 as described above.

  In this state, the inspection power source 17 is switched to, for example, the U-phase non-live line side conductor 9a (non-live line side connection part 12a) and the non-live line side conductor 9d (non-live line side connection part 12d) that is the ground phase. By connecting, a predetermined current is supplied to the load 6a to perform a predetermined test or the like. Similarly, by connecting to the non-live line side conductors 9b and 9c (non-live line side connection portions 12b and 12c) of the V phase and W phase and the non-live line side conductor 9d (non-live line side connection portion 12d). A predetermined test or the like of the loads 6b and 6c is performed.

  In some cases, it is desired to measure the short-circuit current flowing through the short-circuit piece 18 with the test plug 1 inserted into the test terminal 3 as described above. FIG. 15 is a perspective view showing a conventional mode when measuring this short-circuit current. A method for measuring the short circuit current on the power source side according to the prior art will be described with reference to FIG.

  For example, in a state where the live wire side connection portions 13a, 13b, 13c are short-circuited by the short-circuit pieces 18a, 18b, the live wire side connection portion 13c and the live wire side connection portion 13d are connected to the U-shaped terminals 19, 20 at both ends. The fixed conducting wire 21 is connected between the live wire side connection portions 13c and 13d via the terminals 19 and 20, and a short-circuit current flowing through the conducting wire 21 is measured by a clamp meter 22.

  In addition, the following patent document 1 can be mentioned as a well-known document which discloses a prior art.

Utility Model Registration No. 3081845

  In the method for measuring the short-circuit current as described above, it is necessary to connect the live wire side connection portions 13c and 13d with the conductive wire 21 every time the measurement is performed, and this operation is not only troublesome but also the live wire side connection portions 13c and 13d. If the number of times of use accompanying attachment / detachment with respect to the terminals 19 and 20 increases, there is a high possibility that disconnection will occur particularly at the connection portion between the terminals 19 and 20 and the conductor 21.

  On the other hand, a connection bar for connecting the non-hot-line side connection parts 12a to 12d and the hot-line side connection parts 13a to 13d has already been proposed, but the structure is such that the current flowing through the connection bar can be measured. Not. Therefore, the current flowing through the connection bar cannot be measured.

  In view of the above-described prior art, the present invention can collectively short-circuit the hot-wire-side connection sites of each phase of the test plug, can easily measure the short-circuit current at this time, and further, An object of the present invention is to provide a connection jig for easily connecting a non-live wire side connection site and measuring the load current at this time.

The first aspect of the present invention for achieving the above object is as follows:
By inserting between the plurality of power supply side conductors connected to each phase of the power supply and the same number of load side conductors connected to each phase of the load, the power supply side conductor and the load side conductor are electrically connected respectively. And a connection to be attached to a test plug having a plurality of hot-wire-side conductors that are in contact with each of the power-supply-side conductors in the inserted state and the same number of non-hot-wire-side conductors that are in contact with the respective load-side conductors. A jig for
Current measurement in which each phase can be short-circuited to each other via a hot-wire-side connection site that is an end of each live-wire-side conductor, and a clamp portion of a clamp meter for measuring a short-circuit current at this time can be engaged It is the connection jig characterized by having a part.

The second aspect of the present invention is:
By inserting between the plurality of power supply side conductors connected to each phase of the power supply and the same number of load side conductors connected to each phase of the load, the power supply side conductor and the load side conductor are electrically connected respectively. And a connection to be attached to a test plug having a plurality of hot-wire-side conductors that are in contact with each of the power-supply-side conductors in the inserted state and the same number of non-hot-wire-side conductors that are in contact with the respective load-side conductors. A jig for
A connection piece for connecting the non-live line side connection part and the live line side connection part for each phase;
An insulating member for integrating each connection piece;
It is a connection jig characterized by having a current measurement part that can be engaged with a clamp part of a clamp meter for measuring a current flowing from a hot wire side connection part to a non-hot line side connection part.

The third aspect of the present invention is:
In the connection jig according to the second aspect,
Each of the connection pieces extends upward from the non-hot-wire side connection part that is in contact, passes through a transition part that extends horizontally toward the live-line-side connection part, and then extends downward to contact the live-line side connection part. It has a shape
The insulating member integrates the connecting pieces by fixing the crossing parts,
Further, the current measuring portion is formed by a portion extending from the upper side to the lower side of each connection piece.

The fourth aspect of the present invention is:
In the connection jig according to the second aspect,
Each of the connecting pieces is a U-shaped member comprising one leg that contacts the non-live line side connection part, the other leg part that contacts the live line side connection part, and a crossing part that connects both leg parts. Yes,
The insulating member is integrated by fixing at least one outer surface of the leg portion, and is formed in a U shape as a whole,
Furthermore, the current measuring part is formed by a transition part of each connection piece.

According to a fifth aspect of the present invention,
In the connection jig according to the fourth aspect,
A connecting jig characterized in that the insulating member is formed of a flexible member so as to open a U-shaped opening.

The sixth aspect of the present invention is:
In the connection jig according to the fourth aspect,
The insulating member is configured so that a U-shaped opening can be opened by joining one member formed by dividing the U-shaped member into two and the other member via a hinge portion. This is a connecting jig.

The seventh aspect of the present invention is
In the connection jig according to the second aspect,
Each of the connecting pieces has a bifurcated bifurcated portion, the tip of which is in contact with the non-hot-line side connection portion, and the bifurcated bifurcated portion of the distal end is connected to the live line side. It is a U-shaped member consisting of the other leg part that contacts the part and a transition part that connects both leg parts,
The insulating member is formed of a flexible member that integrates the connecting pieces by fixing the crossing portions,
Furthermore, the current measuring part is formed in a part from the tip part of each connection piece to the transition part.

  According to the present invention, not only a plurality of live conductors of a test plug can be short-circuited at once, but also a short-circuit current flowing at this time can be easily measured using a clamp meter. In addition, not only can the hot-wire side conductor and the non-hot-wire side conductor of each phase be connected together, but also the current flowing to the load of each phase at this time It is possible to easily measure using a clamp meter using a connection portion with a side conductor.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The connection jig according to each embodiment is applied to the test plug shown in FIGS. Therefore, the same parts as those in FIGS. 12 to 15 are denoted by the same reference numerals, and redundant description is omitted.

<First Embodiment>
FIG. 1A is a front view showing a connection jig according to the first embodiment of the present invention, and FIG. 2 is a perspective view showing a state in which this connection jig is applied to a test plug 1.

  As shown in both figures, the connection jig 31 is divided into bifurcated terminal portions 32a, 32b, 32c for contacting and fixing the hot wire side connection portions 13a to 13d of each phase of the test plug 1. 32d, current measuring portions 33a, 33b, 33c, 33d extending upward from the respective terminal portions 32a to 32d and extending above the upper surface of the insulating support 11, and upper ends of the current measuring portions 33a, 33b, 33c, 33d The connection unit 34 connects the current measurement units 33a, 33b, 33c, and 33d. Here, the current measuring parts 33a to 33d and the connecting part 34 except for the terminal parts 32a, 32b, 32c and 32d are covered with an insulating cover 35.

  According to the present embodiment, the terminal portions 32a to 32d are connected to the hot wire side connection portions 13a to 13d of the respective phases to short-circuit the hot wire side conductors 8a to 8d of the respective phases of the test plug 1 at a time. Can do. Further, the short-circuit current at this time can be measured by engaging the clamp part 22a of the clamp meter 22 with any one of the current measurement parts 33a to 33d.

  In addition, although Fig.1 (a) showed the thing for 4 poles, it is not restricted to this. Of course, the connection jig 36 for two poles shown in FIG. Further, in the present embodiment, each current measuring unit 33a, 33b, 33c, 33d protrudes above the test plug 1, so that each current measuring unit 33a, 33b, 33c, 33d is on a switchboard (not shown). The case where it interferes with other installed devices can be considered. In order to avoid this, each of the current measuring units 33a, 33b, 33c, and 33d may be folded forward so that the upper part thereof is away from the surface of the switchboard.

<Second Embodiment>
FIG. 3 is a perspective view showing a connection jig according to the second embodiment of the present invention, and FIG. 4 is a perspective view showing a state in which the connection jig is applied to the test plug 1.

  As shown in both figures, the connection jig 41 includes connection pieces 42a, 42b, 42c, and 42d that connect the non-live line side connection parts 12a to 12d and the live line side connection parts 13a to 13d for each phase. And an insulating member 43 in which the connection pieces 42a to 42d are integrated. Here, each connection piece 42a thru | or 42d once extends upward from the non-hot-line side connection site | part 12a thru | or 12d which has contacted, and after passing through the crossing part extended horizontally toward the live-line side connection site | part 13a thru | or 13d, it is downward Terminal portions (44a, 45a), (44b, 45b), (44c, 45c), (44d, 45d) is fixed in contact with the non-hot-wire side connection portions 12a to 12d and the hot-wire side connection portions 13a to 13d of each phase, and the non-hot-wire side connection portions 12a to 12d and the hot wires for each phase. The side connection parts 13a thru | or 13d are connected. Further, the current measuring portion is formed by a portion extending upward or downward of each connection piece 42a to 42d, and the clamp portion 22a of the clamp meter 22 can be engaged with this portion. Furthermore, the insulating member 43 integrates the connection pieces 42a to 42d by fixing the connecting portions of the connection pieces 42a to 42d.

  According to this embodiment, the terminal portions (44a, 45a), (44b, 45b), (44c, 45c), (44d, 45d) are connected to the non-live line side connection portions 12a to 12d of each phase and the live line side connection. The loads 6a to 6c are connected together by connecting the live wire side conductors 8a to 8d and the non-live wire side conductors 9a to 9d in a state where the phases are insulated by the insulating member 43 by connecting to the portions 13a to 13d. A predetermined current can be supplied to (see FIG. 14). At this time, the load current flowing in each phase and the total load current are obtained by engaging the clamp portion 22a of the clamp meter 22 with the U, V, W phase connection pieces 42a to 42c or the ground phase connection piece 42d. Can be measured.

  Also in this embodiment, as in the first embodiment, the connection pieces 42a, 42b, 42c, and 42d protrude above the test plug 1, so that the connection pieces 42a, 42b, 42c, and 42d The case where it interferes with the other apparatus arrange | positioned at the switchboard (not shown) is considered. In order to avoid this, each of the connection pieces 42a, 42b, 42c, and 42d may be folded forward so that the upper part thereof is separated from the surface of the switchboard.

<Third Embodiment>
FIGS. 5A and 5B are views showing a connection jig according to a third embodiment of the present invention, in which FIG. 5A is a front view, FIG. 5B is a plan view thereof, and FIG. 5C is a right side view thereof. FIG. 6 is a perspective view thereof, and FIG. 7 is a perspective view showing a state in which the connection jig is applied to the test plug 1.

  As shown in these drawings, the connection jig 51 includes connection pieces 52a, 52b, 52c for connecting the non-live line side connection parts 12a to 12d and the live line side connection parts 13a to 13d for each phase. 52d and two insulating members 53a and 53b formed in a U-shape in which the connection pieces 52a to 52d are integrated. That is, each of the connection pieces 52a to 52d is sandwiched and integrated so as to occupy a predetermined position between the two insulating members 53a and 53b formed in a U-shape.

  Here, the connection pieces 52a to 52d are in contact with the non-hot-wire side connection portions 12a to 12d through the notches 54a, 54b, 54c, and 54d that match the outer shape of the non-hot-wire side connection portions 12a to 12d. One leg, the other leg in contact with the hot-line side connection parts 13a to 13d via notches 55a, 55b, 55c, 55d matched to the outer shape of the live-line side connection parts 13a to 13d, and both legs This is a U-shaped member consisting of connecting parts 56a, 56b, 56c, 56d that connect the parts, and notches (54a, 55a), (54b, 55b), (54c, 55c), (54d, 55d) The non-hot-wire side connection parts 12a to 12d and the hot-wire side connection parts 13a to 13d of each phase are engaged and fixed, and the non-hot-wire side connection parts 12a to 12d and the hot-wire side connection are provided for each phase. Site 13a no It is adapted to connect the 13d. Further, the current measuring part is formed by the transition parts 56a to 56d of the connection pieces 52a to 52d, and the clamp part 22a of the clamp meter 22 can be engaged with this part. The insulating members 53a and 53b are made of a flexible material, and are configured so that the opening can be opened with the upper and lower sides of the U shape.

  According to this embodiment, the notch portions (54a, 55a) to (54d, 55d) are made to be non-live lines of each phase by opening the openings with the U-shaped upper and lower sides of the insulating members 53a, 53b. The side connection parts 12a to 12d and the hot wire side connection parts 13a to 13d are connected. As a result, the active wires side conductors 8a to 8d and the non-active wire side conductors 9a to 9d are connected together in a state where the phases are insulated by the insulating members 53a and 53b, and the loads 6a to 6c (see FIG. 13). ) Can be supplied with a predetermined current. At this time, the load current flowing in each phase and the total load current are related to the U-, V- and W-phase connection pieces 52a to 52c or the connection portions 52a to 56d of the connection piece 52d with the clamp portion 22a of the clamp meter 22. It can be measured by combining them. That is, in the present embodiment, the crossover portions 56a to 56d function as a current measuring portion.

  The insulating members 53a and 53b can be formed of a rigid body. In this case, as shown in the perspective view of FIG. 8A, one of the insulating members 53a-1, 53b-1 and the other insulating members 53a-2, 53b-, which are formed by dividing the U-shaped member into two parts. Are connected to each other via hinges 57 and 58 so that a U-shaped opening can be opened. That is, as shown in FIG. 8B, the insulating members 53a-1 and 53b-1 and the insulating members 53a-2 and 53b-2 can be rotated via the pins 57a and 58a of the hinge portions 57 and 58. Join.

<Fourth embodiment>
FIGS. 9A and 9B are views showing a connection jig according to a fourth embodiment of the present invention, in which FIG. 9A is a front view, FIG. 9B is a plan view thereof, and FIG. 9C is a right side view thereof. FIG. 10 is a perspective view thereof, and FIG. 11 is a perspective view showing a state in which the connecting jig is applied to the test plug 1.

  As shown in these drawings, the connection jig 61 includes connection pieces 62a, 62b, 62c for connecting the non-live line side connection parts 12a to 12d and the live line side connection parts 13a to 13d for each phase. 62d and an insulating member 63 formed of a strip-shaped flexible member in which the connection pieces 62a to 62d are integrated.

  Here, each connection piece 62a to 62d is similar to the one leg portion 64a, 64b, 64c, 64d whose tip portion contacts the non-hot-wire side connection sites 12a to 12d via a bifurcated branch portion. The other leg portions 65a, 65b, 65c, 65d whose tips contact with the live-line connection sites 13a to 13d through the bifurcated branches, and both legs (64a, 65a), (64b, 65b), (64c, 65c), (64d, 65d) is a U-shaped member consisting of connecting portions 66a, 66b, 66c, 66d, and the leg portions (64a, 65a), (64b, 65b), (64c). 65c), (64d, 65d) are engaged and fixed to the non-live line side connection parts 12a to 12d and the live line side connection parts 13a to 13d of each phase, Live line side connection part 12ano 12d and is adapted to connect the hot-side connecting portion 13a to 13d. That is, the connection jig 61 according to this embodiment has a shape as shown in FIG. 8 and is wound around the test plug 1 so as to have a shape as shown in FIG. That is, the connecting pieces 62a to 62d are arranged and integrated so as to occupy a predetermined position on the surface of the insulating member 63 which is a strip-like flexible member.

  The current measuring part is formed by the leg parts 64a to 64d of the connecting pieces 62a to 62d, and the clamp part 22a of the clamp meter 22 can be engaged with this part.

  According to the present embodiment, the insulating members are formed by connecting the leg portions (64a, 65a) to (64d, 65d) to the non-live line side connection portions 12a to 12d and the live line side connection portions 13a to 13d of the respective phases. In a state where the respective phases are insulated at 63, the live wire side conductors 8a to 8d and the non-live wire side conductors 9a to 9d are connected together to supply a predetermined current to the loads 6a to 6c (see FIG. 13). can do. At this time, the load current flowing in each phase and the total load current are obtained by engaging the clamp portion 22a of the clamp meter 22 with the leg portions 64a to 64d of the connection pieces 62a to 62d of the U, V, and W phases. Can be measured. That is, in this embodiment, the legs 64a to 64d function as a current measuring unit.

  INDUSTRIAL APPLICABILITY The present invention can be effectively used in an industrial field related to technology related to security of electric power equipment.

It is a figure which shows the jig | tool for a connection which concerns on the 1st Embodiment of this invention, (a) is a front view in the case of 4 poles, (b) is a front view in the case of 2 poles. It is a perspective view which shows the state which applied the jig for connection shown in FIG. 1 to the test plug. It is a perspective view which shows the jig for connection which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the state which applied the jig for connection shown in FIG. 3 to the test plug. It is a figure which shows the jig | tool for a connection which concerns on the 3rd Embodiment of this invention, (a) is a front view, (b) is the top view, (c) is the right view. It is a perspective view which shows the connection jig shown in FIG. It is a perspective view which shows the state which applied the jig for connection shown in FIG. 5 to the test plug. 5A and 5B are views showing a modification of the third embodiment shown in FIG. 5, in which FIG. 5A is a perspective view, and FIG. 5B is a cross-sectional view showing an extracted hinge portion. It is a figure which shows the jig | tool for a connection which concerns on the 4th Embodiment of this invention, (a) is a front view, (b) is the top view, (c) is the right view. It is a perspective view which shows the connection jig shown in FIG. It is a perspective view which shows the state which applied the jig for connection shown in FIG. 8 to the test plug. It is a side view (state before inserting a test plug in a test terminal) shown with a switchboard and a test terminal in the state before inserting a test plug into a test terminal. It is a side view shown with a switchboard and a test terminal in the state where a test plug was inserted in a test terminal. FIG. 13 is a circuit diagram showing an equivalent circuit when a test or the like is performed in the state of FIG. 12. It is a perspective view which shows the aspect in the case of measuring the short circuit current which flows into a connection piece in the state which inserted the test plug 1 in the test terminal 3 in the prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Test plug 2 Power distribution board 3 Test terminal 4 Power supply 5 Power supply side conductor 6 Load 7 Load side conductor 8 Hot wire side conductor 9 Non hot wire side conductor 10 Insulation member 11 Insulation support 12 Non hot wire side connection part 13 Hot wire side connection Site 17 Power supply for inspection 18 Short-circuit piece 22 Clamp meter 22a Clamp part 32a-32d Terminal part 33a-33d Current measurement part 34 Connection part 35 Insulation cover 36 Connection jig 42a-42d Connection piece 43 Insulation member 52a-52d Connection piece 53a -53d Insulating member 56a-56d Transition part 57, 58 Hinge part 62a-62d Connection piece 63 Insulating member 64a-64d Leg part 65a-65d Leg part 66a-66d Transition part

Claims (7)

By inserting between the plurality of power supply side conductors connected to each phase of the power supply and the same number of load side conductors connected to each phase of the load, the power supply side conductor and the load side conductor are electrically connected respectively. And a connection to be attached to a test plug having a plurality of hot-wire-side conductors that are in contact with each of the power-supply-side conductors in the inserted state and the same number of non-hot-wire-side conductors that are in contact with the respective load-side conductors. A jig for
Current measurement in which each phase can be short-circuited to each other via a hot-wire-side connection site that is an end of each live-wire-side conductor, and a clamp portion of a clamp meter for measuring a short-circuit current at this time can be engaged A connecting jig characterized by having a portion. By inserting between the plurality of power supply side conductors connected to each phase of the power supply and the same number of load side conductors connected to each phase of the load, the power supply side conductor and the load side conductor are electrically connected respectively. And a connection to be attached to a test plug having a plurality of hot-wire-side conductors that are in contact with each of the power-supply-side conductors in the inserted state and the same number of non-hot-wire-side conductors that are in contact with the respective load-side conductors. A jig for
A connection piece for connecting the non-live line side connection part and the live line side connection part for each phase;
An insulating member for integrating each connection piece;
A connection jig comprising: a current measuring portion that can be engaged with a clamp portion of a clamp meter for measuring a current flowing from a hot wire side connection portion to a non-hot wire side connection portion. The connection jig according to claim 2,
Each of the connection pieces extends upward from the non-hot-wire side connection part that is in contact, passes through a transition part that extends horizontally toward the live-line-side connection part, and then extends downward to contact the live-line side connection part. It has a shape
The insulating member integrates the connecting pieces by fixing the crossing parts,
Furthermore, the said current measurement part is formed in the part extended in the said upward thru | or downward of each connection piece, The jig for connection characterized by the above-mentioned. The connection jig according to claim 2,
Each of the connecting pieces is a U-shaped member comprising one leg that contacts the non-live line side connection part, the other leg part that contacts the live line side connection part, and a crossing part that connects both leg parts. Yes,
The insulating member is integrated by fixing at least one outer surface of the leg portion, and is formed in a U shape as a whole,
Furthermore, the said current measurement part is formed in the transition part of each connection piece, The jig for connection characterized by the above-mentioned. The connection jig according to claim 4,
The connection jig, wherein the insulating member is formed of a flexible member so as to open a U-shaped opening. The connection jig according to claim 4,
The insulating member is configured such that the U-shaped opening can be opened by joining one member formed by dividing the U-shaped member into two and the other member via a hinge portion. Connecting jig to be used. The connection jig according to claim 2,
Each of the connecting pieces has a bifurcated bifurcated portion, the tip of which is in contact with the non-hot-line side connection portion, and the bifurcated bifurcated portion of the distal end is connected to the live line side. It is a U-shaped member consisting of the other leg part that contacts the part and a transition part that connects both leg parts,
The insulating member is formed of a flexible member that integrates the connecting pieces by fixing the crossing portions,
Furthermore, the said current measurement part is formed in the part from the said front-end | tip part of each connection piece to a transition part, The jig for connection characterized by the above-mentioned.

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