FN5-10RD/630A Indoor High Voltage Load Break Switch with Fuse Combination
FN5-10RD/630A Indoor High Voltage Load Break Switch with Fuse Combination is a reliable switching and protection device designed for 12kV, 50Hz AC distribution systems. It combines load current switching with fuse-based short-circuit protection, providing safe and dependable fault interruption for medium-voltage applications.
With a 630A rated current and flexible operating mechanism options, the FN5-10RD/630A is suitable for indoor switchgear, substations, industrial power distribution, and transformer protection systems. Its compact design and integrated protection functions make it a practical solution for reliable 12kV power distribution.
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The FN5-10 Indoor High-Voltage Load Switch and Fuse Combination is designed for 50Hz, 12kV AC power distribution networks. It is used for switching load currents and closing short-circuit currents, while the fuse combination provides additional short-circuit interruption and protection.
The FN5-10 can be configured with different operating mechanisms, including the CS6-1 manual mechanism, dedicated CS manual mechanism, or CJ electric operating mechanism, providing flexible operation options for different indoor switchgear applications.
With its integrated load switching and fuse protection functions, the FN5-10 is suitable for indoor medium-voltage switchgear, substations, industrial power distribution systems, and transformer protection applications requiring reliable switching and fault protection.
Model and Meaning
Operating Conditions
1. Altitude: ≤ 1000 meters;
2. Ambient Temperature: -25°C to +40°C (daily average ≤25°C);
3. Relative Humidity: Daily average ≤95%; Monthly average ≤90%;
4. The ambient air should not be obviously polluted by corrosive or flammable gases, water vapor, etc.
Technical Data
| Item | Unit | Parameter | ||
| Rated Voltage | kV | 12 | ||
| Rated Frequency | Hz | 50 | ||
| Rated Current | A | 400 | 630 | |
| Rated Short-Time Withstand Current | kA | 12.5 / 4s | 20 / 2s | |
| Rated Peak Withstand Current | 31.5 | 50 | ||
| Rated Closed-Loop Breaking Current | A | 400 | 630 | |
| Rated Active Load Breaking Current | 400 | 630 | ||
| 5% Rated Active Load Breaking Current | 20 | 31.5 | ||
| Rated Cable Charging Breaking Current | 10 | |||
| Rated Breaking no-load Thansformer Capacity | / | 1250 | ||
| Rated Short-Circuit Closing Current | kA | 31.5 | 50 | |
| Load Current Breaking Times | Times | 20(100% load) 35(60% load) 75(30% load) 80(5%load) | ||
| 1min Power Frequency Withstand Voltage(Effective Value) | kV | 42 | ||
| Power Frequency Withstand Voltage(Between Isolation Breaks) | 48 | |||
| Lighting Impluse Withstand Voltage(Peak) | To the ground and phase | 75 | ||
| isolation fracture | 85 | |||
| Opening and Closing Operation Moment(force) | N.m(N) | 90(180) | 100(200) | |
Overall and mounting dimensions(mm)
