Unwavering in our dedication to customers and delivering cutting-edge innovations,Bepto stands as your steadfast ally on the journey ahead.
FN5-24 Load Break Switch: 24kV 630A indoor MV LBS with fuse combination, air RMU, 50kA closing, 31.5kA peak withstand, 1250kVA transformer, multiple breaking, -25°C to +40°C.
Advanced FN5-24 Load Break Switch-Fuse Combination: Premium FN5-24 indoor high voltage load switch and fuse combination electrical appliance designed for AC 50Hz 24kV power distribution networks, providing breaking load current and closing short-circuit current capabilities for air RMU applications, featuring load switch with fuse cutting off short-circuit current for protection switching purposes, delivering 630A rated current with 50kA rated short-circuit closing current and 50kA rated peak withstand current (dynamic steady), capable of 20kA (2s) rated short-time withstand current (thermally stable), 630A rated closed-loop and active load breaking current, 10A rated cable charging breaking and 1250kVA rated no-load transformer breaking capacity.
Air RMU Distribution Ready: FN5-24 incorporates multiple load current breaking times—20 times (100% load), 35 times (60% load), 75 times (30% load), 80 times (5% load)—featuring 65kV power frequency withstand voltage (ground/phase), 79kV isolation gap withstand, 125kV lightning impulse (ground/phase) and 145kV isolation fracture impulse, suitable for -25°C to +40°C environments at altitudes ≤1000m, providing reliable indoor medium voltage load break switching solution for 24kV air RMU distribution networks requiring fuse combination protection.
| FN5-24 Load Break Switch Specifications | 400A Model | 630A Model | Unit |
|---|---|---|---|
| Model Number | FN5-24/400 | FN5-24/630 | – |
| Brand | Bepto Insulation Systems | Bepto Insulation Systems | – |
| Product Type | Indoor High Voltage Load Switch and Fuse Combination Electrical Appliance | Indoor High Voltage Load Switch and Fuse Combination Electrical Appliance | – |
| Application | Air RMU (Ring Main Unit) | Air RMU (Ring Main Unit) | – |
| Rated Voltage | 24 | 24 | kV |
| Rated Frequency | 50 | 50 | Hz |
| Rated Current | 400 | 630 | A |
| Rated Short-Time Withstand Current (Thermally Stable) | 12.5 (4s) | 20 (2s) | kA |
| Rated Peak Withstand Current (Dynamic Steady) | 31.5 | 50 | kA |
| Rated Closed-Loop Breaking Current | 400 | 630 | A |
| Rated Active Load Breaking Current | 400 | 630 | A |
| 5% Rated Active Load Breaking Current | 20 | 31.5 | A |
| Rated Cable Charging Breaking Current | 10 | 10 | A |
| Rated Breaking No-Load Transformer Capacity | – | 1250 | kVA |
| Rated Short-Circuit Closing Current | 31.5 | 50 | kA |
| Load Current Breaking Times | 20 (100% Load), 35 (60% Load), 75 (30% Load), 80 (5% Load) | 20 (100% Load), 35 (60% Load), 75 (30% Load), 80 (5% Load) | Times |
| 1min Power Frequency Withstand Voltage (Ground/Phase) | 65 | 65 | kV |
| Power Frequency Withstand Voltage (Isolation Gaps) | 79 | 79 | kV |
| Lightning Impulse Withstand Voltage (Ground/Phase) | 125 | 125 | kV |
| Lightning Impulse Withstand Voltage (Isolation Fracture) | 145 | 145 | kV |
| Opening/Closing Operation Torque (Force) | 90 N·m (180 N) | 100 N·m (200 N) | N·m (N) |
| Ambient Temperature | -25 to +40 (Electric: -5 to +40) | -25 to +40 (Electric: -5 to +40) | °C |
| Altitude | ≤1000 | ≤1000 | m |
| Relative Humidity (Daily/Monthly Average) | ≤95% / ≤90% (+25°C) | ≤95% / ≤90% (+25°C) | – |
| Environment | Free from Corrosive/Flammable Gas, Water Vapor, Severe Vibration | Free from Corrosive/Flammable Gas, Water Vapor, Severe Vibration | – |
| Application | 24kV Power Distribution Networks, Air RMU | 24kV Power Distribution Networks, Air RMU | – |
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.
