Section 1 General Rules

Acceptance testing standards. Valve arresters and surge suppressors*

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

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* Tests of surge arresters not specified in this section should be carried out in accordance with the manufacturer's operating instructions.

1.8.31. 1. Measurement of the resistance of arresters and surge arresters.

The measurement is carried out:

• on arresters and surge arresters with a rated voltage of less than 3 kV - with a megohmmeter for a voltage of 1000 V.
• on arresters and arresters with a rated voltage of 3 kV and above - with a megohmmeter for a voltage of 2500 V.

The resistance of arresters RVN, RVP, RVO, CZ must be at least 1000 MΩ.

The resistance of the RVS arrester elements must comply with the requirements of the factory instructions.

The resistance of the elements of arresters RVM, RVRD, RVMG, RVMK must correspond to the values ​​​​specified in table 1.8.28.

The resistance of surge suppressors with a rated voltage of 110 kV and higher must be at least 3000 MOhm and must not differ by more than ±30% from the data given in the passport.

The insulation resistance of the insulating bases of arresters with response recorders is measured with a megohmmeter for a voltage of 2500 V. The value of the measured insulation resistance must be at least 1 MOhm.

The resistance of surge suppressors with a rated voltage of up to 3 kV must be at least 1000 MOhm.

The resistance of surge suppressors with a rated voltage of 3-35 kV must comply with the requirements of the manufacturers' instructions.

The resistance of surge suppressors with a rated voltage of 110 kV and higher must be at least 3000 MOhm and must not differ by more than ±30% from the data given in the passport.

2. Measurement of the conduction current of valve-type arresters at rectified voltage.

The measurement is carried out at arresters with shunt resistances. In the absence of instructions from manufacturers, conduction currents must correspond to those given in table. 1.8.29.

3. Measurement of the conduction current of surge arresters.

Measurement of the conduction current of surge arresters is carried out:

• for limiters of voltage class 3-110 kV when applying the highest long-term permissible phase voltage;
• for limiters of voltage class 150, 220, 330, 500 kV at a voltage of 100 kV, frequency 50 Hz.

The limit values ​​of the arrester conduction currents must comply with the manufacturer's instructions.

4. Checking the elements included in the device kit for measuring the conduction current of the surge suppressor under operating voltage.

The electrical strength of the insulated output is checked for surge arresters-0330 and 500 kV before commissioning.

The test is carried out with a smooth increase in voltage at a frequency of 50 Hz to 10 kV without a time delay.

The electrical strength of the OFR-10-750 insulator is tested with a voltage of 24 kV at a frequency of 50 Hz for 1 minute.

The conduction current of the protective resistor is measured at a voltage of 0,75 kV at a frequency of 50 Hz. The current value should be between 1,8-4,0 mA.

Table 1.8.28. Resistance values ​​of valve arresters

Table 1.8.29. Permissible conduction currents of valve arresters at rectified voltage*

* To bring the conduction currents of the arresters to a temperature of +20 ºС, a correction equal to 3% should be made for every 10 degrees of deviation (at temperatures above 20 ºС the correction is negative).

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

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