JP4679218B2 - Instrument measurement test lead wire and instrument measurement test method - Google Patents

Description

  The present invention relates to a device measurement test lead wire and a device measurement test method, and in particular, a device measurement test lead suitable for conducting a circuit breaker switching characteristic test or the like in a normal inspection of a circuit breaker with built-in substation switchgear in an electric power company. Wire and equipment measurement test methods.

  In an electric power company, for example, when performing a circuit breaker switching characteristic test in a normal inspection of a circuit breaker with built-in substation switchgear, the circuit breaker 20 is pulled out from the switchgear 10 as shown in FIG. A positive voltage P (for example, a DC voltage of 100 V) and a ground voltage N are supplied from the gear 10 to the circuit breaker 20 and are also disconnected from the circuit breaker measuring device (timing checker) 40 to be described later via the switch gear 10. The switch gear 10 and the circuit breaker 20 are connected to each other through a circuit breaker test lead wire 30 in order to supply the device cut-off control signal C and the circuit breaker-containing control signal T. Here, the switchgear 10 and the circuit breaker 20 are connected to the circuit breaker test lead wire 30 by using the first and second connectors 31 and 32 attached to both ends of the circuit breaker test lead wire 30. Is called.

  Further, a positive voltage P and a ground voltage N are supplied from the switch gear 10 to the circuit breaker measuring device 40, and from the circuit breaker measuring device 40 to the circuit breaker 20 through the switch gear 10 and the circuit breaker test lead wire 30. In order to supply the cut-off control signal C and the breaker-incorporated control signal T, the switch gear 10 and the breaker 20 are connected via the measuring instrument lead wire 50. Here, the switch gear 10 and the measuring instrument lead wire 50 are connected by sandwiching the corresponding terminal of the control circuit terminal block 11 provided in the switch gear 10 with a clip attached to one end of the measuring instrument lead wire 50. It is done by. The circuit breaker measuring instrument 40 and the measuring instrument lead wire 50 are connected to the corresponding terminal of the measuring instrument lead wire connecting terminal group 41 provided in the circuit breaker measuring instrument 40 and to the other end of the measuring instrument lead wire 50. This is done by screwing the attached Y-shaped bare crimp terminal.

In addition, in Patent Document 1 below, a wiring circuit breaker with a leakage alarm function is provided in order to enable a withstand voltage or insulation resistance test between phases of the main circuit of the wiring circuit breaker without the need for wiring. The overcurrent detection element detects the current flowing in the main circuit and has a main circuit overload / short-circuit protection function, and the zero-phase current transformer detects the current flowing in the main circuit and the leakage detection circuit detects leakage. The main circuit of the circuit breaker for wiring and the external terminal are connected, and the power supply terminal and external terminal of the leakage detection circuit are provided on the external terminal block of the circuit breaker for wiring. In the withstand voltage or insulation resistance test, it is disclosed that the lead wire is removed and the leakage judgment circuit is disconnected.
JP-A-7-147724

  However, as described above, since the switch gear 10 and the measuring instrument lead wire 50 are connected by sandwiching the corresponding terminal of the control circuit terminal block 11 of the switch gear 10 with the clip, the worker attaches the clip to the corresponding terminal. There is a possibility of causing a short circuit or a ground fault when sandwiched between the two, and there is a problem that it is dangerous. Further, since the clip is easily detached, there is a problem that the clip may come off during the work, and there is a possibility of troubles such as equipment damage due to a short circuit. Further, even if the worker carefully works at the time of connection so as not to cause such trouble, the distance between the terminals of the control circuit terminal block 11 is narrowed for the miniaturization of the switch gear, and the workability is improved. There is a problem that it is very difficult to avoid such trouble completely because of the badness.

  An object of the present invention is to provide a device measurement test lead wire and a device measurement test method capable of safely performing a circuit breaker switching characteristic test and the like without occurrence of trouble.

The instrument measurement test lead wire of the present invention is an instrument measurement test lead wire for supplying a voltage (P, N) and a control signal (C, T) to a device under test (20). A cable part (2) having an end of the cable, a first connector (3) attached to the first end of the cable part and for connecting the cable part to a switchboard, and the cable A second connector (4) attached to the second end of the cable and for connecting the cable to the device under test, and attached to the third end of the cable. And connecting means for connecting the cable part to the instrument measuring instrument, the cable part being provided between the first and second connectors, and from the switchboard A first voltage for supplying said voltage to the test equipment; A second voltage supply line (71, 72) provided between the first connector and the connection means and for supplying the voltage from the switchboard to the instrument measuring instrument ( 73, 74) and a control signal supply line (75, 74) provided between the connection means and the second connector and for supplying the control signal from the device measuring instrument to the device under test. 76).
Here, the connection means, the crimp terminal or a naked terminal respectively provided on one end of the voltage supply line and said control signal supply line may also do free.
Further, the device measurement test lead wire is connected to the circuit breaker measuring device (40) which is the device measuring device to the circuit breaker (20) which is the device under test. Circuit breaker measurement test lead wire for supplying a positive voltage (P) and a ground voltage (N) to the circuit breaker measuring device and the circuit breaker from the switchgear (10) as the switchboard. It may be.

The first device measurement test method of the present invention is a device measurement test method for testing the device under test using the device measurement test lead wire of the present invention, wherein the cable portion is connected to the cable portion by the connecting means of the cable portion. Connecting the device measuring instrument (S13), connecting the cable portion and the device under test by the second connector of the cable portion (S14), and the first portion of the cable portion. Connecting the cable portion and the switchboard with a connector (S15), and supplying a voltage from the switchboard to the device under test and the device measuring instrument via the first and second voltage supply lines; A step of testing the device under test using the device measuring instrument by supplying a control signal from the device measuring instrument to the device under test via the control signal supply line. (S16) and characterized by including the.
Here, in the step of connecting the cable unit and the device measuring instrument by the connecting unit of the cable unit, the cable is connected by a crimp terminal or a bare terminal provided at one end of the voltage supply line and the control signal supply line, respectively. And the device measuring instrument may be connected.
The second device measurement test method of the present invention is a device measurement test method for testing the circuit breaker using the device measurement test lead wire of the present invention, wherein the circuit breaker incorporated in the switchgear. Removing the circuit breaker control lead connected to the breaker (S11), pulling out the breaker from the switch gear, and then removing the front cover of the breaker (S12); After turning off the control power, connecting the cable unit and the circuit breaker measuring device (S13), connecting the cable unit and the circuit breaker (S14), the cable unit and the switchgear. Connecting the switch gear to the circuit breaker and the circuit breaker measuring device from the switch gear. After the positive voltage and the ground voltage are supplied via the voltage supply line, the breaker-on-control signal and the breaker-off control signal are supplied from the breaker measuring instrument to the breaker via the control signal supply line. To perform a circuit breaker switching characteristic test using the circuit breaker measuring instrument (S16).
Here, in the step of connecting the cable part and the circuit breaker measuring device, the cable part and the circuit breaker measurement are performed by a crimp terminal or a bare terminal provided at one end of the voltage supply line and the control signal supply line, respectively. May be connected to a vessel.

  When the device measurement test lead wire and the device measurement test method of the present invention are used, for example, in a circuit breaker switching characteristic test, the circuit breaker measurement test lead wire is not required to be connected to the switch circuit control circuit terminal block. Since positive voltage, ground voltage, circuit breaker control signal and circuit breaker cut-off control signal can be supplied to the circuit breaker, it has conventionally occurred when connecting the circuit breaker measurement test lead wire to the switchgear control circuit terminal block It is possible to prevent troubles from occurring and to perform operations safely even if not skilled workers.

  A first voltage supply line for supplying voltage from the switchboard to the device under test is provided between the first and second connectors for the purpose of performing a circuit breaker switching characteristic test safely without occurrence of trouble. A second voltage supply line for supplying a voltage to the instrument measuring instrument is provided between the first connector and the connecting means, and a control signal supply line for supplying a control signal from the instrument measuring instrument to the device under test Was realized by using an instrument measurement test lead wire having a cable portion provided between the connecting means and the second connector.

Embodiments of an instrument measurement test lead wire and instrument measurement test method of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, a circuit breaker measurement test lead wire 1, which is a device measurement test lead wire according to an embodiment of the present invention, includes a cable portion 2 having first to third ends, and a first portion of the cable portion 2. A first connector 3 attached to one end portion, a second connector 4 attached to a second end portion of the cable portion 2, and a bare crimp attached to the third end portion of the cable portion 2. A terminal group (connection means).

  Here, the cable portion 2 includes a first positive voltage supply line 71 and a first ground voltage supply line 72 (first and second voltage supply lines 72) for supplying the positive voltage P and the ground voltage N from the switch gear 10 to the circuit breaker 20, respectively. A first voltage supply line provided between the second connectors 3 and 4, and a first voltage P for supplying the positive voltage P and the ground voltage N from the switch gear 10 to the circuit breaker measuring instrument 40 (equipment measuring instrument). Two positive voltage supply lines 73 and a second ground voltage supply line 74 (second voltage supply line provided between the first connector 3 and the crimp terminal group (connection means)), and a circuit breaker measuring instrument. The first and second control signal supply lines 75 and 76 (crimp terminal group (connecting means) and second circuit) for supplying the circuit breaker cut-off control signal C and the circuit breaker-containing control signal T to the circuit breaker 20 from 40, respectively. Control signal provided between the connector 4 Including the supply line) and.

The first connector 3 is for connecting the cable portion 2 to the switch gear 10 (distribution panel), and is connected to a switch gear side connector 11 provided on the switch gear 10.
The second connector 4 is for connecting the cable part 2 to the circuit breaker 20 (device under test), and is connected to a circuit breaker-side connector 21 provided in the circuit breaker 20.

The crimp terminal group is for connecting the cable portion 2 to the circuit breaker measuring instrument 40, and includes a second positive voltage supply line 73, a second ground voltage supply line 74, a first control signal supply line 75, and Y-shaped crimp terminals provided at one end of the second control signal supply line 76 are included. These crimp terminals are screwed to corresponding connection terminals of a measuring instrument lead wire connecting terminal group 41 provided in the circuit breaker measuring instrument 40.
The cable part 2 and the circuit breaker measuring instrument 40 may be connected to each other by using a crimp terminal or a bare terminal such as a clip, or by providing a dedicated connector for the cable part 2 and the circuit breaker measuring instrument 40, respectively. You may make it connect. However, when using a bare terminal such as a crimp terminal or a clip, an insulating cap may be attached to each bare terminal in order to prevent a short circuit or a ground fault during connection.

Next, a method for performing a circuit breaker switching characteristic test using the circuit breaker measurement test lead wire 1 shown in FIG. 1 (equipment measurement test method according to one embodiment of the present invention) will be described with reference to the flowchart shown in FIG. explain.
A circuit breaker control lead wire (not shown) connected to the circuit breaker 20 built in the switchgear 10 is removed. The socket terminal of the removed circuit breaker control lead wire is covered with a vinyl sheet or gummed tape (step S11).
After using the lifter to pull out the circuit breaker 20 from the switch gear 10, the front cover of the circuit breaker 20 is removed (step S12).

After the control power supply of the switch gear 10 is turned off and the supply of the positive voltage from the switch gear 10 is stopped, the second positive voltage supply line 73, the second ground voltage supply line 74, and the first control of the cable unit 2 are stopped. By screwing the crimp terminals respectively attached to one ends of the signal supply line 75 and the second control signal supply line 76 to the corresponding connection terminals of the measuring instrument lead wire connecting terminal group 41 of the circuit breaker measuring instrument 40, a cable is obtained. The unit 2 and the circuit breaker measuring device 40 are connected (step S13).
Then, the cable part 2 and the circuit breaker 20 are connected by connector-connecting the 2nd connector 4 of the cable part 2 and the circuit breaker side connector 21 (step S14).
Then, the cable part 2 and the switch gear 10 are connected by connector-connecting the first connector 3 of the cable part 2 and the switch gear side connector 11 (step S15).

  Subsequently, after the control power of the switch gear 10 is turned on and a positive voltage is supplied from the switch gear 10 to the circuit breaker 20 and the circuit breaker measuring device 40 via the first and second positive voltage supply lines 71 and 73. By supplying the circuit breaker cutting control signal C and the circuit breaker-containing control signal T from the circuit breaker measuring device 40 to the circuit breaker 20 via the first and second control signal supply lines 75 and 76, the circuit breaker measuring device A circuit breaker switching characteristic test using 40 is performed (step S16).

As the circuit breaker switching characteristic test, for example, the following test is performed.
(1) The contact output signal of the main circuit of the circuit breaker 20 is output to the timer (not shown) of the circuit breaker measuring device 40, and the circuit breaker cut-off control signal C of 100V DC voltage is interrupted from the circuit breaker measuring device 40. The circuit breaker operating time when supplied to the control circuit of the breaker 20 via the first control signal supply line 75 is measured by a timer to test whether the breaker 20 is closed within a predetermined operation time.
(2) The contact output signal of the main circuit of the circuit breaker 20 is output to the timer of the circuit breaker measuring device 40, and the circuit breaker control signal T having a DC voltage of 100 V is tripped from the circuit breaker measuring device 40 to the circuit breaker 20. The circuit breaker operating time when supplied to the circuit via the second control signal supply line 76 is measured by a timer to test whether the circuit breaker 20 opens within a predetermined operating time.

(3) The contact output signal of the main circuit of the circuit breaker 20 is output to the timer of the circuit breaker measuring device 40, and the circuit breaker cut-off control signal C with the voltage value lowered is controlled from the circuit breaker measuring device 40 to the circuit breaker 20. The circuit breaker operating time when the circuit is supplied via the first control signal supply line 75 is measured by a timer, and the minimum operating voltage for the closing operation of the circuit breaker 20 is tested.
(4) The contact output signal of the main circuit of the circuit breaker 20 is output to the timer of the circuit breaker measuring device 40, and the circuit breaker control signal T whose voltage value has been lowered is tripped from the circuit breaker measuring device 40 to the circuit breaker 20. The circuit breaker operating time when the circuit is supplied via the second control signal supply line 76 is measured by a timer to test the minimum operating voltage of the circuit breaker 20 for opening operation.

The circuit breaker measurement test lead wire 1 used when performing the circuit breaker switching characteristic test of the circuit breaker 20 using the circuit breaker measuring device 40 has been described above. However, when performing similar tests on various relays, The instrument measurement test leads of the invention can be used.
In addition, for equipment under test with different connector pins for supplying voltage and control signals, equipment measurement test including a cable portion including a plurality of voltage supply lines and / or control signal supply lines, as long as the pins do not overlap. By preparing lead wires, various devices under test may be grouped, and testing may be performed using device measurement test lead wires corresponding to the grouped devices under test.
Further, the second positive voltage supply line 73 may be branched from the middle of the first positive voltage supply line 71 as shown in FIG. 1, or from the first or second connector 3 or 4. You may wire. The same applies to the second ground voltage supply line 74.

  As described above, the device measurement test lead wire and the device measurement test method of the present invention are used, for example, for conducting a circuit breaker switching characteristic test in a normal inspection of a circuit breaker with built-in substation switchgear at an electric power company or the like. Can be used.

It is a figure which shows the structure of the apparatus measurement test lead wire by one Example of this invention. Example 1 It is a flowchart for demonstrating the apparatus measurement test method by one Example of this invention. Example 1 It is a figure for demonstrating the method of performing the conventional circuit breaker switching characteristic test.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Circuit breaker measurement test lead wire 2 Cable part 3 1st connector 4 2nd connector 10 Switch gear 11 Switch gear side connector 20 Circuit breaker 21 Circuit breaker side connector 40 Circuit breaker measuring instrument 41 Measuring instrument lead wire connection terminal group 71 First positive voltage supply line 72 First ground voltage supply line 73 Second positive voltage supply line 74 Second ground voltage supply line 75 First control signal supply line 76 Second control signal supply lines S11 to S16 Step

Claims (7)

An instrument measurement test lead for supplying voltage (P, N) and control signals (C, T) to a device under test (20),
A cable portion (2) having first to third ends;
A first connector (3) attached to the first end of the cable portion and for connecting the cable portion to a switchboard;
A second connector (4) attached to the second end of the cable portion and for connecting the cable portion to the device under test;
A connection means attached to the third end of the cable portion and for connecting the cable portion to the instrument measuring instrument;
Comprising
The cable portion is
A first voltage supply line (71, 72) provided between the first and second connectors and for supplying the voltage from the switchboard to the device under test;
A second voltage supply line (73, 74) provided between the first connector and the connection means and for supplying the voltage from the switchboard to the device measuring instrument;
Control signal supply lines (75, 76) provided between the connection means and the second connector and for supplying the control signal from the device measuring instrument to the device under test.
An instrument measurement test lead wire characterized by that. It said connecting means, and wherein it to contain crimp terminal or a naked terminal respectively provided on one end of the voltage supply line and said control signal supply line, according to claim 1 instrumental measurement test lead according.   The device measurement test lead wires are connected to the circuit breaker measuring device (40) as the device measuring device from the circuit breaker measuring device (40) to the circuit breaker (20) as the device under test. ) And a circuit breaker measurement test lead wire for supplying a positive voltage (P) and a ground voltage (N) to the circuit breaker measuring device and the circuit breaker from the switchgear (10) which is the switchboard. The instrument measurement test lead wire according to claim 1 or 2, characterized in that A device measurement test method for testing the device under test using the device measurement test lead wire according to claim 1,
Connecting the cable unit and the device measuring instrument by the cable unit connecting means (S13);
Connecting the cable part and the device under test by the second connector of the cable part (S14);
Connecting the cable part and the switchboard by the first connector of the cable part (S15);
A voltage is supplied from the switchboard to the device under test and the device measuring instrument via the first and second voltage supply lines, and then from the device measuring instrument to the device under test via the control signal supply line. Testing the device under test using the device measuring instrument by supplying a control signal (S16);
An apparatus measurement test method characterized by comprising: In the step of connecting the cable part and the device measuring instrument by the connecting means of the cable part, the cable part and the cable by the crimp terminal or the bare terminal respectively provided at one end of the voltage supply line and the control signal supply line The instrument measurement test method according to claim 4, wherein an instrument measuring instrument is connected. A device measurement test method for testing the circuit breaker using the device measurement test lead wire according to claim 3,
Removing a circuit breaker control lead connected to the circuit breaker built in the switchgear (S11);
Removing the front cover of the circuit breaker after pulling out the circuit breaker from the switchgear (S12);
After turning off the control power of the switch gear, connecting the cable part and the circuit breaker measuring device (S13);
Connecting the cable part and the circuit breaker (S14);
Connecting the cable portion and the switch gear (S15);
After turning on the control power of the switch gear and supplying the positive voltage and the ground voltage from the switch gear to the breaker and the breaker measuring instrument via the first and second voltage supply lines, The circuit breaker measuring device is used to perform a circuit breaker switching characteristic test by supplying the circuit breaker-on control signal and the circuit breaker cut-off control signal to the circuit breaker via the control signal supply line from the circuit breaker measuring device. Performing step (S16);
An apparatus measurement test method characterized by comprising: In the step of connecting the cable part and the circuit breaker measuring instrument, the cable part and the circuit breaker measuring instrument are connected by a crimp terminal or a bare terminal provided at one end of the voltage supply line and the control signal supply line, respectively. The instrument measurement test method according to claim 6, wherein connection is made.

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