FN5-12 type indoor high voltage load switch and fuse combination electrical appliance, Applicable to AC 50Hz, 12kv power distribution network, used for breaking load current and closing short circuit current. Load switch with fuse cut off the short-circuit current, for protection switching purposes.
1. The altitude does not exceed 1000m;
2. Ambient air temperature: upper limit + 40°C, lower limit -25°C (electric mechanism not lower than -5°C);
3. Relative humidity: daily average value not more than 95%, monthly average value not more than 90% (+25℃);
4. The surrounding air should not be obviously polluted by corrosive or flammable gas, water vapor, etc.;
5. No frequent severe vibration.
Note: If it exceeds the requirements of the above normal use environmental conditions, it is necessary to negotiate with the manufacturer.
Rated Short-Time Withstand Current(Thermally Stable Current)
Rated Peak Withstand Current (Dynamic Steady Current)
Rated Closed- Loop Breaking Current
Rated Active Load Breaking Current
5% Rated Active Load Breaking Current
Rated Cable Charging Breaking Current
Rated Breaking No-Load Transformer Capacity
Rated Short Circuit Closing Current
Load Current Breaking Times
20(100% Load) 35(60% Load) 75(30% Load) 80(5% Load)
1 min Power Frequency Withstand Voltage(Effective Value)
42 Ground and Phase
Power Frequency Withstand Voltage (Between Isolation Gaps)
Lightning Impulse Withstand Voltage(Peak)
Ground and Phase 75, Isolation Fracture 85
Opening and Closing Operation Torque (Force)
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