Unwavering in our dedication to customers and delivering cutting-edge innovations,Bepto stands as your steadfast ally on the journey ahead.
FN7-12D Indoor Load Break Switch: 12kV 630A medium voltage LBS with spring mechanism or vacuum circuit breaker option, 50kA breaking, 31.5kA withstand, fuse combination, 85kV impulse, reliable operation.
Advanced FN7-12D Indoor Load Break Switch: Premium FN7-12D series featuring flexible configuration with spring mechanism for standard switching ON/OFF or optional vacuum circuit breaker for enhanced reliability in 12kV 630A three-phase AC 50/60Hz power networks, delivering exceptional 50kA short-circuit closing capacity with 31.5kA/1s rated short-time withstand current (20kA/2s, 18kA/3s), designed for breaking load current and controlling short-circuit current, featuring 85kV lightning impulse withstand across isolating distance and 48kV power frequency withstand, with fuse combination capability up to 1600A maximum breaking capacity and 200A maximum fuse current.
Reliable Distribution Network Ready: FN7-12D incorporates simplified installation with operating mechanism integrated design (FN7C-12 type with fuse box), suitable for ambient temperatures -10°C to +40°C and altitudes up to 1000m, providing reliable load break switching solution for indoor substations, industrial facilities, power distribution systems, and medium voltage networks requiring flexible spring or vacuum circuit breaker operation with fuse protection and superior insulation performance.
| FN7-12D Indoor Load Break Switch Specifications | Technical Parameters | Unit |
|---|---|---|
| Model Number | FN7-12D (FN7-24 also available) | – |
| Brand | Bepto Insulation Systems | – |
| Product Type | Indoor Medium Voltage Load Break Switch (LBS) | – |
| Operating Mechanism Options | Spring Mechanism / Vacuum Circuit Breaker (Optional) | – |
| Rated Voltage | 12 (24 available) | kV |
| Rated Current | 630 | A |
| Rated Frequency | 50 / 60 | Hz |
| Rated Short-Circuit Closing Current | 50 | kA |
| Rated Peak Withstand Current (Dynamic Steady Current) | 50 | kA |
| Rated Short-Time Withstand Current (1s) | 31.5 (FN7-12) / 25 (FN7-24) | kA |
| Rated Short-Time Withstand Current (2s) | 20 (FN7-12) / 25 (FN7-24) | kA |
| Rated Short-Time Withstand Current (3s) | 18 (FN7-12) / 16 (FN7-24) | kA |
| Max. Breaking Capacity in Cooperation with Fuse | 1600 (FN7-12) / 900 (FN7-24) | A |
| Max. Fuse Current | 200 | A |
| 1 Min Power Frequency Withstand Voltage (to Earth and Between Poles) | 42 (FN7-12) / 65 (FN7-24) | kV |
| 1 Min Power Frequency Withstand Voltage (Across Isolating Distance) | 48 (FN7-12) / 79 (FN7-24) | kV |
| Lightning Impulse Withstand Voltage (to Earth and Between Poles) Peak | 75 (FN7-12) / 125 (FN7-24) | kV |
| Lightning Impulse Withstand Voltage (Across Isolating Distance) Peak | 85 (FN7-12) / 145 (FN7-24) | kV |
| Ambient Temperature Range | -10°C to +40°C | – |
| Maximum Altitude | 1000 | m |
| Relative Humidity | Daily ≤90%, Monthly ≤95% | – |
| Application | Indoor Substations, Power Distribution, Medium Voltage Networks | – |
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.
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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.
