Unwavering in our dedication to customers and delivering cutting-edge innovations,Bepto stands as your steadfast ally on the journey ahead.
FN7-24R Load Break Switch: 24kV 630A indoor LBS with fuse holder, 50kA breaking capacity, IEC62271-105, load/short-circuit breaking, three-phase 50/60Hz, -25°C to +40°C operation.
Advanced FN7-12/24DR Load Break Switch Series: Premium FN7-24R indoor high voltage load break switch designed for three-phase power supply systems with rated voltage 12/24kV and AC 50/60Hz, manufactured per IEC62271-105 standard, featuring integrated fuse holder for switching on/off load-breaking current and short-circuit current, delivering 630A rated current with 50kA rated short-circuit closing current and peak withstand current, capable of 25kA rated short-time withstand current (1s/2s) and 16kA (3s), providing maximum breaking capacity 900A in cooperation with fuse (200A max fuse current), designed for -25°C to +40°C ambient temperature operation at altitudes up to 1000m.
Three-Phase Distribution System Ready: FN7-24R incorporates 65kV power frequency withstand voltage (phase to earth/between poles) and 125kV lightning impulse withstand voltage (1.2/50μs), suitable for environments free from inflammables, explosives, corrosives with 95% daily humidity and earthquake intensity 8 degree, providing reliable indoor load break switching solution for three-phase distribution systems, substations, industrial facilities requiring IEC-compliant high-voltage load break switch with fuse holder and proven 50kA breaking performance.
| Main Specification | |||||||
| Type | Model | DS | DX | L | R | RA | F |
| Earthing Switch at Input Terminal | Earthing Switch at Output Terminal | Interlock Device | Fuse | Impact Release | Power Closing Device | ||
| No Release | FN7-12/24 | – | – | – | – | – | – |
| FN7-12/24DSL | △ | – | △ | – | – | – | |
| FN7-12/24DXL | – | △ | △ | – | – | – | |
| FN7-12/24R | – | – | – | △ | – | – | |
| FN7-12/24DSLR | △ | △ | △ | – | – | ||
| FN7-12/24DXLR | – | △ | △ | △ | – | – | |
| With Impact Release | FN7-12/24RAF | – | – | – | – | △ | △ |
| FN7-12/24DSLRAF | △ | – | △ | – | △ | △ | |
| FN712/24DXLRAF | – | △ | △ | – | – | – | |
| Note: (-)without (△)with | |||||||
| Rated Data | ||||||||
| Rated Voltage（kV） | Max Voltage
（kV） |
Rated Current
（A） |
1min P.F Withstand Voltage
（kV） |
4s Thermal Stable Current
（virtual）（kA） |
Dynamic Stable Current
（peak）（KA） |
Short Circuit Making Current
（kA） |
Rated Breaking Current
（A） |
Rated Transfer Current
（A） |
| 12 | 12 | 400 | 42/48 | 12.5 | 31.5 | 31.5 | 400 | 1000 |
| 630 | 42/48 | 20 | 50 | 50 | 630 | 1000 | ||
| 20 | 24 | 400 | 50/60 | 16 | 40 | 40 | 400 | 1000 |
| 630 | 50/60 | 20 | 50 | 50 | 630 | 1000 | ||
| FN7-24R Load Break Switch Specifications | FN7-12 | FN7-24R | Unit |
|---|---|---|---|
| Model Number | FN7-12 | FN7-24R | – |
| Brand | Bepto Insulation Systems | Bepto Insulation Systems | – |
| Product Type | Indoor AC High Voltage Load Break Switch with Fuse Holder | Indoor AC High Voltage Load Break Switch with Fuse Holder | – |
| Standard Compliance | IEC62271-105 | IEC62271-105 | – |
| 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) | 1600 | 900 | A |
| Max Fuse Current | 200 | 200 | A |
| Power Frequency Withstand Voltage (Phase to Earth) | 42 | 65 | kV |
| Power Frequency Withstand Voltage (Isolating Distance) | 48 | 79 | kV |
| Lightning Impulse Withstand (Phase to Earth) 1.2/50μs | 75 | 125 | kV |
| Lightning Impulse Withstand (Isolating Distance) | 85 | 145 | kV |
| Altitude | ≤1000 | ≤1000 | m |
| Ambient Temperature | -25 to +40 | -25 to +40 | °C |
| Relative Humidity (Daily/Monthly Average) | 95% / 90% | 95% / 90% | – |
| Earthquake Intensity | 8 degree | 8 degree | – |
| Application | Three-Phase Power Systems, Substations, Industrial Facilities | Three-Phase Power Systems, Substations, Industrial Facilities | – |
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.
