Norms of acceptance tests. Fuses, fuse-disconnectors with voltage above 1 kV

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Section 1 General Rules

Norms of acceptance tests. Fuses, fuse-disconnectors with voltage above 1 kV

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

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1.8.33. 1. Testing the support insulation of fuses with increased power frequency voltage.

The test voltage is set according to Table. 1.8.24.

The duration of application of the normalized test voltage is 1 min. Testing the support insulation of fuses with increased power frequency voltage can be carried out in conjunction with testing the busbar insulators of the cell.

2. Checking the integrity of fusible links and current-limiting resistors.

Checked:

ohmmeter - the integrity of the fusible insert;
visually - the presence of markings on the cartridge and the correspondence of the current to the design data.

3. Measurement of the DC resistance of the current-carrying part of the fuse-disconnector holder.

The measured resistance value must match the value specified by the manufacturer.

4. Measurement of contact pressure in the detachable contacts of the fuse-disconnector.

The measured value of the contact pressure must correspond to that specified by the manufacturer.

5. Checking the condition of the arcing part of the fuse-disconnector cartridge.

The internal diameter of the arcing part of the fuse-disconnector cartridge is measured.

6. Checking the operation of the fuse-disconnector.

5 cycles of closing and opening operations of the fuse-disconnector are carried out. Each operation must be successful on the first try.

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

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