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Ana sayfa > Ürün Merkezi > 10-35KV Vacuum Circuit Breaker > Indoor Vacuum Circuit Breaker > ZN85 40.5kv indoor three pole mechanical switchgear High Voltage Vacuum Circuit Breaker

ZN85 40.5kv indoor three pole mechanical switchgear High Voltage Vacuum Circuit Breaker

    ZN85 40.5kv indoor three pole mechanical switchgear High Voltage Vacuum Circuit Breaker

    The ZN85 40.5kV Indoor Three Pole Mechanical Switchgear High Voltage Vacuum Circuit Breaker provides reliable indoor electrical protection for medium and high voltage networks. Featuring vacuum interruption, robust mechanical design, and compact three-pole configuration, it ensures safety, operational continuity, and low maintenance, ideal for industrial facilities and indoor substations.
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Environmental conditions:

1. Altitude: the altitude does not exceed 2000m;

2. Ambient temperature: no higher than +40℃, not lower than -25℃;

3. Relative humidity: the daily average does not exceed 95%, and the monthly average does not exceed 90%;

4. Earthquake intensity: no more than 8 degrees;

5. Locations without fire, explosion hazard, serious contamination, chemical corrosion and severe vibration.

Structural features:

1. The circuit breaker adopts the arc extinguishing chamber on the upper part, and the structure of the whole structure under the mechanism is favorable for debugging;

2. It adopts composite insulation structure of air and organic materials, which is compact in design and light in weight;

3. It can be equipped with the vacuum interrupter of Cutler-Hammer Company of the United States and the domestic ZMD vacuum interrupter. The two arc extinguishing chambers adopt the longitudinal magnetic field arc extinguishing, low interception and good asymmetric breaking performance.

4. Simple spring operating mechanism, 10,000 operations free of maintenance.

5. Screw drive mechanism, labor-saving, stable, self-locking performance.

The main technical parameters


NameUnitValue
Rated voltageKV40.5
1min power frequency withstand voltage (effective value)KV 95
Lightning impulse withstand voltage (effective value)KV 185
Rated frequencyHz50
Rated currentA1250,1600,2000
Rated short-time withstand currentKA25,31.5
Rated peak withstand currentKA63,80
Rated short circuit durationS4
Rated short-circuit breaking currentKA 25,31.5
Rated short circuit closing currentKA63,80
Rated operation sequence
0-0.3s-Co-180s-Co
Break timems<80
Rated short-circuit breaking current breaking timestime 20
Single capacitor bank breaking currentA630
Back-to-back capacitor bank breaking currentA400
Rated operating voltageV~110/-110,~220/-220
Mechanical lifetime10000



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Phone: +8613736779975

E-mail: sales@vcbbreaker.com

Address: 66 Punan Road, Yueqing Economic Development Zone, Zhejiang, China

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