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Load Break Switch Branch Boxes Series Cable Branch Boxes & Switching Stations
4 Models available
Images are for illustration purposes only
Cable Branch Boxes with Load Break Switch — Ring Main Function
Cable branch boxes with a built-in load break switch combine cable distribution with switching capability, allowing each outgoing feeder to be isolated and switched for ring-main operation. Rated 12–24 kV, 630A, they use SF6 or vacuum load break switches for maintenance-free switching in urban distribution networks and ring main configurations.
Applications
Urban ring-main distribution networks
Feeder sectionalizing and isolation
Municipal grid reconfiguration
Industrial and renewable plant distribution
Key Features
- Integrated SF6 or vacuum load break switch per feeder
- Ring-main switching capability with fault isolation
- 630A rated main busbar for 12–24 kV networks
- Compact pad-mounted or surface-mounted enclosure
- Manual or motorized operating mechanism options
- Configurable feeder count for loop networks
Specifications Range
All specifications and dimensions can be customized upon request
| Key parameters | Model Range |
|---|---|
| Rated Voltage | 12 |
| Rated Current | 630 A |
| Main Circuits | 4 |
| Short-time Withstand Current | 20 kA |
| Protection Level | IP4X |
| Standard | GB3906, IEC 62271-200 |
| Compare | Model | Series | Rated voltage (kV) | Current (A) | Frequency (Hz) | Insulation | Standard | Weight | Dimensions |
|---|---|---|---|---|---|---|---|---|---|
| FZX-630-1W | Load Break Switch Branch Boxes | 12 | 630 | - | — | GB3906, IEC 62271-200 | 101 kg | 2270×1765×3025 mm | |
| FZX-630-2W | Load Break Switch Branch Boxes | 12 | 630 | - | — | GB3906, IEC 62271-200 | 101 kg | 2270×1765×3025 mm | |
| FZX-630-3W | Load Break Switch Branch Boxes | 12 | 630 | - | — | GB3906, IEC 62271-200 | 101 kg | 2270×1765×3025 mm | |
| FZX-630-4W | Load Break Switch Branch Boxes | 12 | 630 | - | — | GB3906, IEC 62271-200 | 101 kg | 2270×1765×3025 mm |
Product Drawing
Cable Branch Box - FZX-630-3W
Note: This is a general product illustration. For detailed technical drawings and specifications, please contact our engineering team.
Selection Guide
Switching
Specify manual or motorized operation based on automation needs.
Feeders
Choose the outgoing feeder count to match the loop configuration.
Insulation
Select SF6 or vacuum switch per project preference and environment.
- Frequently Asked Questions
Why add a load break switch to a branch box?
A load break switch lets each feeder be switched and isolated for maintenance or fault clearing, enabling ring-main operation where a cable fault can be isolated while the rest of the loop stays energized.
SF6 or vacuum switch?
Both are maintenance-free; SF6 offers compact gas insulation, vacuum offers high switching endurance. Either is suitable for 12–24 kV distribution.
What is the standard rating?
Typically 630A, 12–24 kV, with load break switching duty.
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Certification
The values below are computed from what you selected above. Anything that cannot be computed yet is shown as an em dash — never as zero.
Iₙ = S / (√3·U) · I_sc = 100·Iₙ / uₖ · S_sc = √3·U·I_sc · I_p = k·Iₖ
Still required to complete the calculation: rated capacity S, impedance voltage uₖ, short-time or peak withstand current.
Per-model values (P0 / Pk / uₖ declared by the factory, losses, noise, temperature rise, dimensions, weight) are not in the product library: those rows stay at an em dash until the factory parameter sheet is supplied. An em dash means the value is unavailable — it is never rendered as zero.
Reference prices are for estimation only and do not constitute a formal offer.
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