RU200084U1 - Device for testing arc fault and spark gaps protection devices - Google Patents

Abstract

The utility model relates to the field of measuring and fire-fighting technology, in particular to test equipment, which is designed to test protection devices against arc breakdown and spark gaps.

The technical result is to ensure the protection of the tested apparatus and test equipment from incorrect actions of the operator during the test, as well as to increase the accuracy of testing the tested protection apparatus.

The technical result is achieved by the fact that the device for testing protection devices against arc breakdown and spark gaps contains an automatic switch, a stopwatch, an arc generator, a starter, a limit switch, an adjustable load and an ammeter.

Description

The utility model relates to the field of measuring and fire-fighting technology, in particular to testing equipment, which is designed to test protection devices against arc breakdown and spark gaps (UZDP and AFDD) installed in electrical networks or electrical installations.

Known device for testing protective devices, based on the principle of loading them with current. (Patent RU 2148835 C1 IPC G01R 31/02 publ. 10.05.2000).

The disadvantage of the known device is that it lacks the ability to check the protection devices against arc breakdown and arc gaps.

The purpose of the utility model is to provide a safe check for the declared characteristics ( _actuation t = f (I _arc) ) of all types of protection devices against arc breakdown and arc gaps of domestic and foreign manufacturers.

The technical result is a device for testing protection devices against arc breakdown and spark gaps, which eliminates the disadvantages of the analogue.

The technical result is achieved by the fact that the device for testing protection devices against arc breakdown and spark gaps contains an automatic switch, a stopwatch, an arc generator, a starter, a limit switch, an adjustable load and an ammeter.

The essence of the utility model is illustrated by the diagram of the proposed device.

In the diagram (Fig. 1), numbers indicate

1 - automatic switch;

2 - stopwatch;

3 - arc generator;

4 - starter;

5 - limit switch;

6 - adjustable load;

7 - ammeter;

8 - protection apparatus.

A device for testing protection devices against arc breakdown and spark gaps operates as follows.

When the circuit breaker 1 is turned on, mains voltage is applied to input 8 of the protection device. When the protection device 8 is turned on, the starter 4 is triggered, preparing the stopwatch circuit 2 (by closing the contacts), and a current measured by the ammeter 7 flows through the closed arc generator 3 and the connected load 6. The adjusting screw of the arc generator (in the drawing, the adjusting screw is conventionally not shown) open the electrodes, creating a spark gap, followed by the emergence of a stable electric arc. At the same time, the limit switch 5 is closed and the stopwatch 2 is started. Under the influence of the arc on a working protection device, it is triggered, the stopwatch is turned off and the arc stops burning. In this case, the stopwatch records the response time of the protection device (UZDP, AFDIS).

Thus, the advantage of the proposed device for testing protection devices against arc breakdown and spark gaps is that the device contains: protection against short-circuit and overload currents when checking SPDD, AFDD; the ability to regulate the values of the arc current and change the nature of the load to ensure a safe and high-precision check for the declared characteristics for all types of SPDDs and ultrasonic devices of domestic and foreign manufacturers.

Claims (1)

A device for testing protection devices against arc breakdown and spark gaps, characterized in that it contains a circuit breaker that is connected to the protection device, while the starter is triggered, preparing the stopwatch circuit, and a current measured by an ammeter flows through the closed arc generator and the connected load.

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