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550SR is a single breaker construction having an excellent breaking capability by the puffer arc extinction with dual motion system |
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Adoption of high capable and reliable hydraulic mechanism for circuit breaker |
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Certificated by the newly revised IEC standards |
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Circuit breaker : Certificated in International Authorization Laboratory-KEMA in accordance with IEC62271-100 |
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One phase in one enclosure type | |
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Item |
550kV GIS |
Model |
550SR |
Rated Voltage (kV rms) |
550 |
Rated Short-circuit Breaking Current (kA rms) |
50 |
Rated Current (A rms) |
4000 |
Rated Frequency (Hz) |
50 / 60 |
Rated Power Frequency Withstand Voltage (kV rms) |
710 |
Rated Lightning Impulse Withstand Voltage (kV peak) |
1550 |
Rated Switching Impulse Withstand Voltage (kV peak) |
1175 |
Rated Gas Pressure (Mpa) |
0.7 / 0.45 | |
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550SR |
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Circuit Breaker |
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- Puffer method for arc extinction operated by hydraulic operation |
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Make-proof Earthing Switch |
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- Motor spring operation |
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Disconnector Switch |
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- Motor operation |
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Earthing Switch for Maintenance |
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- Motor operation | |
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