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The 17.5KV fixed type indoor circuit breaker adopts an integrated design of the VET operating mechanism and the circuit breaker. Some main circuits can utilize fully sealed columns to achieve miniaturization, high reliability, and maintenance-free operation of the circuit breaker. This circuit breaker is generally used in metal-clad withdrawable switchgear and can also be used in XGN box-type fixed indoor AC metal-enclosed switchgear.
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Rated voltage |
12/17.5KV |
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Rated frequency |
50Hz |
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Rated lightning impulse withstand voltage (peak value) |
75kV |
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Rated short-time power frequency withstand voltage (1 min) |
42kV |
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Rated current |
630/1250A |
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Rated short-circuit breaking current |
20/25kA |
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Rated operating sequence |
O～0.3s-CO-180s-CO |
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Rated single/back-to-back capacitor bank breaking current |
630/400A |
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Rated short-circuit breaking current and number of breaking operations |
30 times |
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Closing time |
35-70ms |
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Opening time (of the circuit breaker) |
20-50ms |
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Mechanical life |
10,000 times |
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Rated energy storage capacity and operating voltage |
AC220/110 DC220/110 |
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Three-phase switching on and off is not simultaneous. |
≤ 2 ms |
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Main electrical circuit resistance |
≤ 50(630A )≤45(1250A) |
1. Operating temperature: -10℃ to 40℃ (storage and transportation allowed at -30℃)
2. Altitude: not exceeding 1000m
3. Relative humidity: daily average not exceeding 95%
4. 17.5KV Fixed Type Indoor Circuit Breaker is suitable for locations with seismic intensity not exceeding magnitude 8, and free from fire, explosion, chemical corrosion, and severe vibration.Suitable for locations with seismic intensity not exceeding magnitude 8, and free from fire, explosion, chemical corrosion, and severe vibration.
Address
Jinlu Industrial Zone, Beibaixiang Town, Yueqing City, Wenzhou City, Zhejiang Province, China
