Unwavering in our dedication to customers and delivering cutting-edge innovations,Bepto stands as your steadfast ally on the journey ahead.
FN7-12R Air Load Break Switch: 12kV 630A indoor LBS with fuse holder for RMU, 50kA peak withstand, 1600A fuse breaking, spring mechanism, vacuum option, -10°C to +40°C.
Advanced FN7-12R Load Break Switch Series: Premium FN7-12R air load break switch designed for three-phase AC 50Hz 12kV power networks, specifically engineered for Ring Main Unit (RMU) applications for breaking load current and controlling short-circuit current, featuring spring mechanism for switching ON/OFF supply with optional vacuum circuit breaker upgrade for enhanced reliability, delivering 630A rated current with 50kA rated short-circuit closing current and peak withstand current (dynamic steady), 31.5kA (1s), 20kA (2s) and 18kA (3s) rated short-time withstand current (thermally stable), providing 1600A maximum breaking capacity with fuse cooperation and 200A maximum fuse current.
RMU and Simple Installation Ready: FN7(C)-12R type incorporates integrated fuse holder based on FN7-12R series with operating mechanism for simpler installation meeting RMU requirements, featuring 42kV power frequency withstand (ground/phase), 75kV lightning impulse, suitable for -10°C to +40°C environments at altitudes ≤1000m, providing reliable air load break switching solution for 12kV RMU applications requiring spring mechanism operation with optional vacuum circuit breaker for enhanced performance.
| FN7-12R Air Load Break Switch Specifications | FN7-12R | FN7-24 | Unit |
|---|---|---|---|
| Model Number | FN7-12R | FN7-24 | – |
| Brand | Bepto Insulation Systems | Bepto Insulation Systems | – |
| Product Type | Indoor Air Load Break Switch and Fuse Holder for RMU | Indoor Air Load Break Switch and Fuse Box | – |
| Operating Mechanism | Spring Mechanism (Vacuum Circuit Breaker Optional) | Spring Mechanism (Vacuum Circuit Breaker Optional) | – |
| Application Focus | RMU (Ring Main Unit) | General Distribution | – |
| Rated Voltage | 12 | 24 | kV |
| Rated Frequency | 50/60 | 50/60 | Hz |
| Rated Current | 630 | 630 | A |
| Rated Short-Circuit Closing Current | 50 | 50 | kA |
| Rated Peak Withstand Current (Dynamic Steady) | 50 | 50 | kA |
| Rated Short-Time Withstand Current (1s) | 31.5 | 25 | kA |
| Rated Short-Time Withstand Current (2s) | 20 | 25 | kA |
| Rated Short-Time Withstand Current (3s) | 18 | 16 | kA |
| Max Breaking Capacity (with Fuse Cooperation) | 1600 | 900 | A |
| Max Fuse Current | 200 | 200 | A |
| 1min Power Frequency Withstand (Ground/Phase) | 42 | 65 | kV |
| Power Frequency Withstand (Isolating Distance) | 48 | 79 | kV |
| Lightning Impulse Withstand 1.2/50μs (Ground/Phase) | 75 | 125 | kV |
| Lightning Impulse Withstand (Isolating Distance) | 85 | 145 | kV |
| Ambient Temperature | -10 to +40 | -10 to +40 | °C |
| Altitude | ≤1000 | ≤1000 | m |
| Relative Humidity (Daily/Monthly Average) | ≤90% / ≤95% | ≤90% / ≤95% | – |
| Application | RMU (Ring Main Unit), 12kV Three-Phase AC Power Networks, Load Current Breaking, Short-Circuit Control | Three-Phase AC Power Networks, Load Current Breaking, Short-Circuit Control | – |
Bepto is a leading Chinese company in electrical insulation, focused on developing advanced solutions for future power systems. We support transmission and distribution safety and growth, with long-term partners including State Grid, ABB, Schneider, Siemens, and GE. Our services reach clients in over 22 countries.
Bepto focuses on the global market and provides our clients with products suitable for the local market:
Unwavering in our dedication to customers and delivering cutting-edge innovations,Bepto stands as your steadfast ally on the journey ahead.
