Norms of acceptance tests. Vacuum circuit breakers

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Section 1 General Rules

Norms of acceptance tests. Vacuum circuit breakers

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Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)

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1.8.22. 1. Measurement of insulation resistance of secondary circuits and windings of control electromagnets.

The measurement is made according to the instructions in section 1.8.37.

2. Insulation test with increased voltage of frequency 50 Hz.

2.1. Circuit breaker insulation test.

The value of the test voltage is taken according to Table 1.8.16.

2.2. Testing the insulation of secondary circuits and windings of control electromagnets.

Tests are carried out according to the instructions in section 1.8.37.

3. Checking the minimum operating voltage of the circuit breaker.

The control electromagnets of the vacuum circuit breakers must operate:

switching electromagnets at a voltage of not more than 0,85 Unom;
shutdown electromagnets at a voltage of not more than 0,7·Unom.

4. Testing switches by multiple trials.

The number of operations and complex cycles to be performed by the circuit breaker at rated voltage at the terminals of the electromagnets must be:

3-5 turn-on and turn-off operations;
2-3 VO cycles without time delay between operations.

5. Measurement of resistance to direct current, measurement of the time characteristics of switches, measurement of the movement of moving parts and the simultaneity of closing contacts.

Produced if required by the manufacturer's instructions.

See other articles Section Rules for the installation of electrical installations (PUE).

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The ECG identification system consists of three components: the actual heart rate, an electronic wristband and a computer, tablet or smartphone running Android, iOS, Windows or Mac OS, on which an identification application is installed.

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