Fuses, fuse-disconnectors

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Annex 3. Standards for testing electrical equipment and apparatus for electrical installations of consumers

Fuses, fuse-disconnectors

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Encyclopedia of radio electronics and electrical engineering / Rules for the technical operation of consumer electrical installations (PTE)

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K, M - are produced within the time limits established by the PPR system.

Name of the test	Type of test	Test norms	Directions
15.1. Testing the support insulation of fuses with increased power frequency voltage	К	The test voltage must comply with the data in Table. 5 (Annex 3.1)	It is allowed to produce, together with the testing of busbar insulators,
15.2. Checking the integrity of the fusible link	К	The integrity of the fuse link is checked with an ohmmeter; presence of markings with the value of the rated current of the fuse link - visually	The rated current of the fuse link must correspond to the design data
15.3. Measuring the DC resistance of a live part of an exhaust fuse holder	К	The measured resistance value must correspond to the value of the rated current according to the marking on the cartridge	Carried out if the corresponding data is available in the manufacturer’s instructions
15.4. Measurement of contact pressure in detachable fuse contacts	К	The measured value must match the factory data
15.5. Checking the condition of the arc extinguishing part of the exhaust fuse holder	К	The internal diameter of the arc extinguishing part of the fuse-disconnector holder is measured. The measured diameter value must correspond to the factory data
15.6. Checking the fuse-disconnector	К	5 cycles of switching on and off the fuse-disconnector are performed. Every operation must be successful on the first try
15.7. Thermal imaging control	М	Produced in accordance with established standards and manufacturer's instructions

See other articles Section Rules for the technical operation of consumer electrical installations (PTE).

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