RU113418U1 - RELAY OF INSPECTION OF ELECTRICAL STRENGTH OF RELAY INSULATION - Google Patents

Abstract

A stand for testing the electrical strength of the insulation of a relay containing a control unit, a test unit, a switch, a connecting device, characterized in that an attestation unit is introduced, the input of which is connected to the switch input and the programmable output of the control unit, and the test unit is made with the possibility of remote control.

Description

The utility model relates to electrical engineering and can be used in technological equipment for verification and testing in serial production of relays.

A known installation for checking electrical safety of the GPT-705A relay (Product catalog of Eliz Pribor LLC, www.elizpribor.ru) is used to perform acceptance tests of relays of any series and types with different standards in terms of amplitude and time of exposure to test voltage.

The disadvantages of the analogue are:

- high complexity of connecting wires and switching test modes when checking a large number of circuits;

- low accuracy when manually setting test voltages for individual circuits.

The closest analogue to the claimed technical solution is a stand for checking the electrical strength of the relay insulation (RU 2079919, with a priority of 08/03/1994, publication date 05/20/1997), taken as a prototype consisting of a control unit, a test unit, a switch and connecting devices with sensors readiness for work.

The disadvantage of the prototype is the inability to test different types of relays, due to the need to change the algorithm for testing other series of electrical devices.

The technical result of the claimed utility model is the versatility of the device.

The technical result is achieved by the fact that in the test bench for the electrical strength of the insulation of the relay containing the control unit, test unit, switch, connecting device, a certification unit is introduced, the input of which is connected to the input of the switch and the output of the control unit made programmable, and the test unit is made with the possibility of remote management.

Each type of unified relay, depending on the position of the switch on the control unit, has its own verification algorithm, which consists in choosing the number of circuits to be checked, the sequence of circuit tests and the voltage amplitude applied to each circuit being tested.

Thanks to the introduction of a certification unit into the device and the implementation of a programmable control unit, and a test unit with the possibility of remote control, the device allows testing different types of relays, i.e., it has versatility.

The technical essence of the claimed utility model is illustrated by the drawing according to the figure, which shows the structural diagram of the stand for checking the electrical strength of the insulation of the relay and the following notation:

1 - control unit;

2 - test block;

3 - switch;

4 - connecting device;

5 - certification block.

The inventive stand for checking the electrical strength of the insulation of the relay contains a control unit 1, a test unit 2, a switch 3, a connecting device 4, a certification unit 5. The control unit 1 is made programmable, and the test unit 2 is made with remote control. The certification unit, the input is connected to the input of the switch and the output of the control unit. If necessary, for example, with differences in the connecting elements of the relay, an additional connecting device can be used in the stand.

The stand for checking the electrical strength of the insulation of the relay operates as follows.

Management of the stand is carried out by the control unit 1, made programmable. By means of switches the choice of relay type and time of checks is carried out. The launch of the stand is carried out by the corresponding button.

In the initial state, the switch 3, consisting of magnetic starters, provides the disconnected state of the terminals of the connecting device 4 from the output buses of the test unit 2. The test unit 2 does not generate test voltages on its output buses.

To check the dielectric strength of the relay insulation, it is necessary to install the relay under test in the connecting device 4. Use the switches to select the type of relay and the test time. Each selected relay type has its own stand operation algorithm. When the stand is started, the control unit 1, made programmable, gives control signals to the switch 3 for connecting the terminals of the connecting device 4 to the first test circuit (circuit 1) and connecting the circuit 1 to the output buses of the test unit 2. After preparing the circuit, the control unit 1 programmable gives a control signal test unit 2 for the supply of test voltage with amplitude U _isp.1 . Thus, a check of the dielectric strength of the insulation of the first circuit of the tested relay is carried out for a given test time. If the test result is positive, the tests of the remaining n-circuits automatically continue at the corresponding amplitudes of the test voltages U _U.n. Upon completion of the test of the electrical strength of the insulation of the tested relay, the stand is automatically restored to its initial state, and the test block 2 signals a positive test result. If the test result is negative for any of the n-circuits, the tests are stopped, and the test block 2 signals a breakdown of the circuit. Certification unit 5 allows using its LED indicators to check the voltage supply algorithm for the output of the tested relays.

The inventive device has been successfully tested and received a positive rating. A product is being prepared for use by the enterprise for its intended purpose.

Claims (1)

A test stand for checking the electric strength of a relay insulation, containing a control unit, a test unit, a switch, a connecting device, characterized in that a certification unit is introduced, the input of which is connected to the input of the switch and the output of the control unit made programmable, and the test unit is made with the possibility of remote control.