Section 1 General Rules

Norms of acceptance tests. Suspension and support insulators

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

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1.8.35. For post insulators, the power frequency overvoltage test is not mandatory.

Electrical testing of glass suspension insulators is not carried out. Control of their condition is carried out by external examination.

1. Measurement of the insulation resistance of suspension and multi-element insulators.

Produced with a megaohmmeter for a voltage of 2,5 kV only at positive ambient temperatures. Checking of insulators should be carried out immediately before their installation in switchgear and on power lines. The insulation resistance of each suspension porcelain insulator or each element of the pin insulator must be at least 300 MΩ.

2. Power frequency overvoltage test:

a) supporting single-element insulators. For insulators of indoor and outdoor installations, the values ​​​​of the test voltage are given in Table. 1.8.32;

b) supporting multi-element and suspension insulators. Newly installed pin and suspension insulators should be tested with a voltage of 50 kV applied to each element of the insulator. It is allowed not to test suspension insulators.

The duration of application of the normalized test voltage is 1 min.

Table 1.8.32. Test voltage of supporting single-element insulators

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