General introduce
ZN-85-40.5 (modular type) indoor vacuum circuit breaker is suitable for indoor high voltage equipment with rated voltage of 40.5 kV and three-phase AC 50 Hz. It can be used as industrial and mining enterprises, power plants and substations as load current, overload current and short circuit. For current use, it is suitable for frequent operation.
Main Features
1. It is convenient for adjustment due to the vacuum circuit breaker adopt the design of arcing chamber is located on the upper, the operating mechanism is located on the down;
2. It adopt the structure of combination of air and organic composite insulating material;
3. Simple spring operating mechanism, 10000 operating times;
4. Smooth and good self-locking performance due to lead-screw propulsion mechanism.
Structural features:
The voltage can reach 40.5kV, the current 1250/2500A, and the breaking can reach 31.5KA/4s
Suitable cabinet size:
Model C: 1200×2600×2400mm
Model S: 1400×2800×2600mm
Ambient condition
1. Altitude: ≤ 3000m
2. Ambient temperature: -40°C~+40°C
3.The ambient air can be contaminated dust, smoke, corrosive gases, vapors or salt spray
4.The wind speed does not exceed 34m / s (equivalent to 700pa on the cylindrical surface)
5. Ambient pollution: IV
6. Vibration or earth from the switch and control equipment at the Ministry is negligible
