JPH05111140A - Relay testing device - Google Patents

Abstract

PURPOSE:To diversify an output of a power source to be input to a power protection relay unit to be tested. CONSTITUTION:A power source switching circuit 35 has transformers 42, 43, and selectively switches mutual connections of a plurality of output terminals 21, 22, 23, 24 of a testing unit 20 and connection of the transformers 42, 43 to vary an output current value. A matrix connection switching circuit 50 switches to connect a first connecting terminal group 51 connected with a power source switching circuit 35 and a second connecting terminal group 52 connected to a test connector 30 for connecting a power protection relay unit 36 to be tested. A controller 55 controls to switch the circuit 35 and the circuit 50. Accordingly, it can be reduced in size without necessity of using a special external power source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay test device,
The present invention relates to a device for testing a power protection relay device under test by adding a test voltage and a test current to the power protection relay device under test.

[0002]

2. Description of the Related Art As shown in FIG. 2, a power protection relay device 1 to be tested for a load test comprises a plurality of devices connected to a voltage coil 3, a current coil 4 and an operating contact 5 provided on a circuit board 2. The terminals 6 to be connected are wired to the edge of the circuit board 2. The relay tester 7 is provided with a test current output terminal 8, a test voltage output terminal 9 and a response contact input terminal 10.

When testing the power protection relay device 1 to be tested, lead wires 11 connected to the terminals 8, 9 and 10 of the relay tester 7 are connected to the power protection relay device 1 to be tested and the test contents. Power protection relay device under test 1
To the connected terminal 6 of the relay tester 7 by outputting the test voltage and the test current from the terminals 8 and 9 of the relay tester 7 to the voltage coil 3 and the current coil 4 of the power protection relay device 1 under test. As a power source, the operation of the operation contact 5 is detected by the signal input to the input terminal 10 of the response contact of the relay tester 7 to determine the test result.

[0004]

In the relay tester shown in FIG. 2, the terminals 8, 9, 10 of the relay tester 7 and the connected terminal 6 of the power protection relay device 1 under test are connected to lead wires.
The connection must be made at 11, and in particular, in order to output a large output load current, the relay tester 7 becomes large. If the relay tester cannot output a large output load current with a small output, use an external transformer.
12 must be connected, the connection is complicated and it takes time to connect, and the power protection relay device under test has different connection conditions for the connected terminals, which may result in incorrect connection. was there.

The present invention has been made in view of the above-mentioned problems, and the output of the power source can be diversified while the device is downsized.
(EN) A relay test device which improves connection workability of a power protection relay device under test.

[0006]

A relay test apparatus of the present invention has an output terminal for outputting a test power supply and an input terminal for receiving a response contact signal from a power protection relay apparatus under test, and is input from the input terminal. A test section for determining a test result by a received signal, a test connection section for connecting a plurality of connected terminals of the power protection relay device under test, and a transformer to which a plurality of output terminals of the test section are connected. A power supply switching circuit unit that selectively switches the mutual connection of a plurality of output terminals of the test unit and the connection of a transformer to change the output power supply value, and the input terminal of the test unit and the output terminal of the power supply switching circuit unit are connected. And a second connection terminal group connected to the test connection section for connecting the first connection terminal group and the second connection terminal group respectively by switching. And the above The a switching circuit portion and the connecting switching circuit portion respectively is obtained and a control unit for switching connections.

[0007]

In the relay test apparatus of the present invention, when the power protection relay device under test is connected to the test connection portion, the second connection terminal group of the connection switching circuit unit is connected to the power protection relay device under test. The controller switches the output power of the power supply switching circuit unit corresponding to each connected terminal of the power protection relay device under test, and the first connection terminal group of the connection switching circuit unit and the power protection relay device under test. The second connection terminal group to which the connection target terminal is connected is switched and connected. In this state, if you output the test voltage, test current, etc. from the test section,
It is input to the power protection relay device under test, the operating state of the power protection relay device under test is input from the connection switching circuit unit to the test unit, and the test result can be determined. Then, the test power source from the test unit added to the power protection relay device under test is
The power supply switching circuit controlled to be switched by the control unit outputs a desired power supply, which is input to the test connection unit via the connection switching circuit unit, and the power protection relay device under test can be tested. A variety of test power supplies can be output according to the model of the power protection relay device under test without using a special test power supply, and the connection switching circuit section can be switched and controlled by the control section according to the wiring conditions. This makes it easy to connect the test section and the power protection relay device under test, and there is no risk of incorrect connection.

[0008]

EXAMPLE The configuration of an example of the present invention will be described.

Reference numeral 20 denotes a relay test section, which is a relay test section 20.
Is connected to a plurality of test power supply output terminals 21, 22, which are selectively connected to switch the test current, test voltage and response signal reception.
23, a test voltage output terminal 24, and an input terminal 25 are arranged at one end edge, and load current and load voltage are output terminals 21, 22, 23,
The test result is judged by detecting the operation state of the relay of the power protection relay device under test 26 by the response contact signal output from 24 and input from the input terminal 25.

Reference numeral 30 denotes a test connection portion for connecting the power protection relay device 26 to be tested. The test connection portion 30 has an edge portion in which a plurality of connection terminals of the power protection relay device 26 to be tested are arranged in parallel. An insertion portion 31 is formed so that it can be inserted and removed freely. A plurality of test terminals connected to the respective connected terminals of the power protection relay device under test 26 are arranged in the insertion portion 31.

Reference numeral 35 is a power supply switching circuit section, in which a plurality of test power supply output terminals 21, 22, 23 of the test section 20 and a test voltage output terminal 24 are connected by a connector cable 27.
Multiple test power source output terminals 21, 22, 23 for switching contact 3
Output terminals 38, 39, 40 for outputting a plurality of test power supply output terminals 21, 22, 23 of the test section 20 and a test voltage of the test section 20 can be selectively switched by opening / closing 6, 37 and connected in parallel. It has an output terminal 41 for outputting the output terminal 24 and a switching contact
When the 36 is closed, the output terminal 38 is connected to the output terminal 38 of the test unit 20.
A test current in which 21 and 22 are connected in parallel is output, and a test current in which the test power supply output terminals 21 and 23 of the test section 20 are connected in parallel is output to the output terminal 39 by closing the switching contact 37.

Further, in the power supply switching circuit section 35, two divided current transformers 42, 43 are provided between the output terminal 21 and the output terminal 38 of the test section 20 via open / close contacts 45, 46, 47, 48. Connected.

Reference numeral 50 is a matrix connection switching circuit section, which is connected to the input terminal 25 of the relay testing section 20 by a connector cable 27 and which is an output terminal of the power supply switching circuit section 35.
A first connection terminal group 51 connected to the 38, 39, 40, 41 with a connector cable 48, and a second connection terminal group 52 connected to the test terminals of the test connection section 30 with a connector cable 49. Is provided. The matrix connection switching circuit section 50 includes a first connection terminal group 51 and a second connection terminal group 52.
The respective connection terminals 53 and 54 can be selectively connected.

Reference numeral 55 is a control unit formed by a CPU or the like. The control unit 55 switches the power source switching circuit unit 35 using a general-purpose serial interface according to the model of the power protection relay device 26 under test. The contacts 36, 37 and the opening / closing contacts 45, 46, 47, 48 are controlled to be opened / closed, and the first connection terminal group 51 and the second connection terminal group 51 of the matrix connection switching circuit unit 50 are connected.
The connection terminals 53 and 54 of the connection terminal group 52 are selectively switched and controlled. The control unit 55 is provided with a switching contact 36, 37 and a switching contact 45, 46, 47, 48 of the power supply switching circuit unit 35 according to the model of the power protection relay device 26 under test, and a matrix connection switching circuit. A connection condition for selectively switching the connection terminals 53 and 54 of the first connection terminal group 51 and the second connection terminal group 52 of the section 50 is stored.

In the power protection relay device 26 to be tested, a relay such as a voltage coil and a current coil and a response contact that responds to the coil of each relay are connected to the circuit board 60, and one edge of the circuit board 60 is connected. To the voltage coil,
A plurality of connected terminals connected to a current coil, a response contact, etc. are provided.

Next, the operation of this embodiment will be described.

Each output terminal 21, 22, 23, of the relay test section 20
A plurality of connected terminals of the power protection relay device 26 to be tested are provided in the insertion portion 31 of the test connecting portion 30 which is connected to the 24 and the input terminal 25 via the power supply switching circuit portion 35 and the matrix connection switching circuit portion 50. When the edge portions are inserted in such a manner that they can be inserted and removed freely, a plurality of output terminals 21, 22, 23, 24 and an input terminal 25 of the relay test section 20
Power switching circuit 35 and matrix connection switching circuit
Each connected terminal of the power protection relay device 26 under test is connected via 50 and 50.

Then, the controller 55 controls the power supply switching circuit 35.
Switch control. When the switching contacts 36, 37 are opened and the open / close contacts 45, 46, 47, 48 are opened, the output terminal 38
The test current output from the output terminal 21 of the test section 20 is output to, the test current output from the output terminal 22 of the test section 20 is output to the output terminal 39, and the test current of the test section 20 is output to the output terminal 40. The test current output from the output terminal 23 is output. The test voltage output from the output terminal 24 of the test section 20 is output to the output terminal 41.

When the switching contact 36 is closed, the test currents output from the output terminals 21 and 22 of the test section 20 are output in parallel to the output terminal 40. When the switching contact 37 is closed, the test current is output to the output terminal 39. The test currents output from the output terminals 21 and 23 of the test unit 20 are output in parallel. Furthermore, switching contacts 45, 46, 47, 48
Is closed, the output terminal 38 has current transformers 42, 43
Secondary current is output.

Further, the connection switching circuit unit 50 is controlled by the control unit 55 in accordance with the power protection relay device 26 under test for the first connection terminal group.
Each connection terminal 53 of 51 and each connection terminal 54 of the second connection terminal group 52
Switch and connect. In this state, the test voltage, test current, etc. output to the output terminals 38, 39, 40, 41 of the power supply switching circuit section 35 are selectively output to the connected terminals of the power protection relay device 26 under test. Then, when the load is applied to the connected terminal of the power protection relay device 26 under test, the operating state of the relay of the power protection relay device 26 under test is input to the input terminal 25 of the relay test section 20 via the matrix connection switching circuit section 50. A signal of the operating state of the relay of the power protection relay device to be tested 26 is input, and the test result of the power protection relay device to be tested 26 can be determined by this received signal.

[0021]

According to the present invention, the control unit switches the output power of the power source switching circuit unit, and the first connection terminal group of the connection switching circuit unit and the connected terminals of the relay device under test are connected. It can be switched and connected to the second connection terminal group,
By outputting the test voltage, test current, etc. from the test section, the operating state of the relay is input from the connection switching circuit section to the test section according to the test current or test voltage input to the device under test, and the test results are displayed. Can be determined. Then, the test power supply from the test unit supplied to the power protection relay device under test becomes a required power output in the power supply switching circuit controlled and switched by the control unit, and the test connection unit is connected through the connection switching circuit unit. The power protection relay device under test can be tested. A variety of load power sources can be output according to the model of the power protection relay device under test without using a special external power source, enabling downsizing, and the connection switching circuit section is controlled by the control section according to the wiring conditions. By switching control, the test section and the power protection relay device under test can be automatically connected, and there is no risk of incorrect connection.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a relay test apparatus showing an embodiment of the present invention.

FIG. 2 is a circuit diagram of a conventional relay test device.

[Explanation of symbols]

 20 Test part 21, 22, 23, 24 Output terminal 25 Input terminal 26 Power protection relay device under test 30 Test connection part 35 Power supply switching circuit part 42, 43 Transformer 50 Matrix connection switching circuit part 51 First connection terminal group 52 No. 2 connection terminal group 55 controller

Claims (1)

[Claims] 1. A test unit having an output terminal for outputting a test power supply and an input terminal for receiving a response contact signal from a power protection relay device under test, and determining a test result by a received signal input from the input terminal. A test connection section for connecting a plurality of connected terminals of the power protection relay device under test, a plurality of output terminals of the test section are connected, and a transformer is provided, and a plurality of output terminals of the test section are parallel to each other. A first connection terminal group in which a power supply switching circuit unit that selectively switches connection switching and transformer connection to change an output power supply value, and an input terminal of the test unit and an output terminal of the power supply switching circuit unit are connected. And a connection switching circuit section that has a second connection terminal group connected to the test connection section and that switches and connects the first connection terminal group and the second connection terminal group, respectively, and the power supply switching circuit section. Disconnected Relay test apparatus characterized by e and a circuit portion respectively and a control unit for switching connections.