Section 1 General Rules

Norms of acceptance tests. Disconnectors, separators and short circuiters

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

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1.8.24. 1. Insulation resistance measurement:

a) leashes and rods made of organic materials. Produced with a megohmmeter for a voltage of 2,5 kV. The insulation resistance must not be lower than the values ​​given in 1.8.19, clause 1a;

b) multi-element insulators. Produced in accordance with 1.8.35;

c) secondary circuits and windings of control electromagnets. Manufactured in accordance with 1.8.37.

2. Power frequency overvoltage test:

a) insulation of disconnectors, separators and short circuiters. Produced in accordance with table. 1.8.16;

b) insulation of secondary circuits and windings of control electromagnets. Produced in accordance with 1.8.37.

3. DC resistance measurement:

a) the measurement must be carried out between the points “contact terminal - contact terminal”. The results of resistance measurements must comply with factory standards, and if they are absent, with the data in Table. 1.8.21;

b) windings of control electromagnets. The winding resistance values ​​must correspond to the manufacturer's data.

4. Measurement of pulling forces of moving contacts from fixed ones.

Produced for 35 kV disconnectors and separators. Measuring the value of pulling forces when the contact surfaces are degreased must correspond to the manufacturer’s data.

5. Checking the operation of the disconnector, separator and short circuit.

Manually operated devices shall be verified by performing 5 closing operations and 5 opening operations.

Remote controlled devices must also be tested by performing 5 switching operations and the same number of switching operations at the rated voltage at the terminals of the electromagnets and control motors.

6. Determination of time characteristics.

Produced at short circuiters when switching on and at separators when switching off. The measured values ​​must correspond to the manufacturer's data.

7. Checking the operation of the mechanical interlock.

The interlock should not allow the main knives to be operated while the grounding knives are turned on, and vice versa.

Table 1.8.21. The highest permissible direct current resistance of the contact system of disconnectors and separators

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