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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

Load break switches

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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
14.1. Measurement of insulation resistance of secondary circuits and windings of EMU	К	Manufactured in accordance with Section 28
14.2. Power frequency overvoltage test:
1) isolation switches	К	The test voltage must comply with the data in Table. 5 (Appendix 3.1)	Test duration - 1 min.
2) isolation of secondary circuits and windings of EMU	К	Manufactured in accordance with Section 28
14.3. DC resistance measurement:		The resistance should not be more than 1,5 times higher than the original or original	Produced at the contact system of the phase and each pair of working contacts of the circuit breaker
1) current-carrying circuit		The results of measuring the resistance of the current-carrying circuit of the pole must correspond to the factory data, and in their absence - to the data of the initial measurements, which differ by no more than 10%
2) EMU windings		The results must correspond to the factory data, and in their absence - to the data of the initial measurements.
14.4. Determining the degree of wear of the arc extinguishing liners	К	The wall thickness of the liners should be within (0,5 ± 1,0) mm
14.5. Determining the degree of burnt contacts	К	Burning of the movable and fixed arcing contacts in total should be no more than 4 mm	Determined by the distance between the movable and fixed main contacts at the time of their closure
14.6. Checking the operation of the free release mechanism	К	The free trip mechanism must be tested in operation with the drive on, in two or three intermediate positions and at the border of the free trip zone.	-
14.7. Undervoltage operation test	К	Carried out in accordance with the instructions of paragraph 10.10 of section 10	-
14.8. Testing the circuit breaker by repeated closing and opening	К	Produced at rated voltage at the terminals in accordance with the instructions of paragraph 10.10 of section 10
14.9. 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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