Surge suppressors are designed to protect electrical equipment in 20 kV networks with an isolated neutral. For surge suppressors, a range of selection of the highest long-term permissible operating voltage is offered from 20 to 27 kV in increments of 0.1 kV
| Maximum continuous permissible operating voltage, value, kV | 24 * ) | ||
| Rated voltage, kV, not less | thirty | ||
| Classification voltage at classification current 2 mA, kV, not less | thirty | ||
| Throughput current on a rectangular pulse with a duration of 2000 μs, A | 400 | 550 | 650 |
| Rated discharge current, kA | 10 | ||
| The remaining voltage at the arrester with a current pulse of 30/60 μs with an amplitude: | |||
| – 250 A, kV, no more | 59.6 | ||
| – 500 A, kV, no more | 62.7 | ||
| – 1000 A, kV, no more | 65.9 | ||
| Remaining voltage at the surge arrester with a current pulse of 8/20 µs with amplitude: | |||
| – 5000 A, kV, no more | 72.1 | ||
| – 10000 A, kV, no more | 78.5 | ||
| – 20000 A, kV, no more | 84.0 | ||
| Remaining voltage at the arrester at a pulse of 1/4 μs with the amplitude of the rated discharge current, kV, no more | 91.2 | ||
| High current pulse amplitude 4/10 μs, kA | 65 | 100 | |
| Specific dissipated energy, over two pulses, kJ/kV, not less | 4.2 | 6.4 | 7.8 |
| Leakage distance of external insulation, cm/kV, | at customer’s request 2.25, 2.5 and 3.1 |
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| Electrical strength of external insulation | according to GOST R 52725 | ||
| Explosion-proof current according to GOST R 52725 | 40 kA | ||
| Warranty period, years | |||
| for surge arresters | 1 | ||
| for MOPN1 | |||
| Estimated service life, years | |||
| for surge arresters | thirty | ||
| for MOPN | 40 | ||
| Guaranteed shelf life in manufacturer’s containers, years | 1 | ||
Manufacturer of power transmission and distribution equipments.
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