Explosion-Proof Over-Voltage Protector
Special purpose surge arrester is consisted of four star connection element and base. It is mainly used in power plant, substation and plant power system. For generator, transformer (including electric furnace transformer), switch, generatrix, motor and other electric equipment except limiting atmospheric overvoltage protection, also can limit over-voltage of power system operating at the same time, reliable protection of electrical equipment insulation.
Application
It is mainly used to protect the phase-to-phase and phase-to-ground insulation of 35KV and below high-voltage motors, transformers, parallel compensation capacitors, switches, cables, electric furnaces, power station power distribution equipment, rectifier equipment, generators, electrolyzers and other electrical equipment from operating overvoltage and The damage of atmospheric overvoltage can effectively limit the amplitude of overvoltage below the insulation tolerance level of electrical equipment, protect the insulation of electrical equipment, and maintain the safe operation of electrical equipment.
Our company’s products are combined, which can effectively realize the phase-to-ground insulation protection and phase-to-phase insulation protection of electrical equipment. They can effectively limit operating overvoltage and atmospheric overvoltage. This product uses a zinc oxide varistor with excellent performance, which has the advantages of large 2ms current flow capacity, excellent volt-ampere characteristics, small residual voltage ratio, and high resistance to 4/10us high current impact level; the operating voltage is suitable and reliable
Type | Model | Mode of connection | System Rated Voltage (KV) | Nominal discharge Current (KA) | Suppress-or rated voltage | Suppress-or operating voltage | DC1mA reference voltage not less than | sharp-ont wave surge voltage Residual voltage | Nominal discharge current residual pressure | Residual voltage operating shock current | 2ms Square wave flow （A） |
effective value （KV） | （KV） | Peak value（KV） | |||||||||
Power stati-on type | BWKG-B-7.6/1000 | Phase-phase Phase-ground | 6 | 5 | 10 | 7.6 | 15.0 14.4 | 31.0 | 27.0 | 23.0 | 400～1000 |
BWKG-B-12.7/1000 | Phase-phase Phase-ground | 10 | 17 | 12.7 | 25.0 24.0 | 51.8 | 45.0 | 38.3 | |||
BWKG-B-42 | Phase-phase Phase-ground | 35 | 51 | 42 | 84.0 76.0 | 160.0 144.0 | 140.0 124.0 | 134.0 114.0 | 400～1600 | ||
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Technical parameter
Type | Model | Mode of connection | System Rated Voltage (KV) | Nominal discharge Current (KA) | Suppress-or rated voltage | Suppress-or operating voltage | DC1mA reference voltage not less than | sharp-ont wave surge voltage Residual voltage | Nominal discharge current residual pressure | Residual voltage operating shock current | 2ms Square wave flow （A） |
effective value （KV） | （KV） | Peak value（KV） | |||||||||
Power stati-on type | BWKG-B-7.6/1000 | Phase-phase Phase-ground | 6 | 5 | 10 | 7.6 | 15.0 14.4 | 31.0 | 27.0 | 23.0 | 400～1000 |
BWKG-B-12.7/1000 | Phase-phase Phase-ground | 10 | 17 | 12.7 | 25.0 24.0 | 51.8 | 45.0 | 38.3 | |||
BWKG-B-42 | Phase-phase Phase-ground | 35 | 51 | 42 | 84.0 76.0 | 160.0 144.0 | 140.0 124.0 | 134.0 114.0 | 400～1600 | ||
Scope of application
Operating temperature is -40℃~+40℃，altitude less than 1000m，maximum wind speed less than 35m/s,power supply frequency is 48 Hz~62 Hz, supply for absorber power frequency voltage between terminals shall not exceed absorber of continuous operating voltage
Test method and the attention items
1.DC 1mA reference voltage test, test values shall conform to the requirements of Table1.
2.leakage current value of 0.75 times DC1mA reference voltage must less than 50μA;