SFXNUMX circuit breakers

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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

SFXNUMX circuit breakers

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

Name of the test	Type of test	Test norms	Directions
12.1. Measurement of insulation resistance of secondary circuits and windings of electromagnets	К	Manufactured in accordance with Section 28
12.2. Insulation test:
1) Insulation test with increased power frequency voltage	K, T	The value of the test voltage is taken from Table. 5 (Annex 3.1)	Tests are carried out on fully assembled devices with a voltage of 35 kV and below.
2) Testing the insulation of the secondary circuits and windings of the EMU	К	Manufactured in accordance with Section 28
12.3. DC resistance measurement:
1) Main circuit resistance measurement	K, T	The resistance must be measured both as a whole of the entire current-carrying circuit, and separately for each break of the arc extinguishing device (if the design of the device allows it)	During the current repair, the resistance of the current-carrying circuit of the circuit breaker as a whole is measured
2) Measurement of the resistance of the EMU windings and additional resistors in their circuit	K, T	The measured resistance values must comply with factory standards
12.4. Checking the minimum operating voltage of circuit breakers	К	Switches must operate at voltage: no more than 0,7 U_Mr. when the drive is powered from a DC source no more than 0,65 U_Mr. when the drive is powered from the AC mains Electromagnets must be energized	The test is carried out at the nominal pressure of SFXNUMX gas in the cavities of the switch and the highest operating pressure in the reservoirs of the drive
12.5. Voltage Divider Capacitor Test	К	The test must be carried out in accordance with the instructions in section 4.	The measured capacitance values must comply with the manufacturer's standard
12.6. Checking the characteristics of circuit breakers	K, T	When checking the operation of SF18 circuit breakers, the characteristics prescribed by the factory instructions must be determined. The results of the checks must match the passport data. Types of operations and complex cycles, pressure values in the drive reservoir and operating current voltages at which the check should be carried out are given in Table. 3.1 (Annex XNUMX)	The values of proper opening and closing times must be provided at the nominal pressure of SFXNUMX gas in the arc chutes of the circuit breaker, the initial excess pressure of compressed air in the drive tanks, equal to the nominal one, and the nominal voltage at the EMU terminals
12.7. Monitoring for SFXNUMX leaks	K, T	Control is carried out using a leak detector. The probe of the leak detector examines the places of seals of butt joints and welds of the circuit breaker. The control is carried out at the nominal pressure of the SFXNUMX gas	The test result is considered satisfactory if the outlet device of the leak detector does not show leaks.
12.8. Checking the moisture content of SFXNUMX gas	К	The moisture content is determined based on the dew point measurement. The dew point temperature should not exceed minus 50 °С	Measurements are made before filling and samples of SFXNUMX gas after filling
12.9. Tests of built-in current transformers	K, T	Produced in accordance with the instructions of paragraphs 20.1, 20.3.2, 20.5, 20.6, 20.7 section 20
12.10. Thermal imaging control	М	Produced in accordance with established standards and manufacturer's instructions

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