The world's fastest vacuum circuit-breaker. Quickly reduce operating costs expenses while improving reliability

The smart device for rural overhead distribution networks up to 27 KV

By virtually eliminating the impacts of temporary faults on lateral lines, Fusesaver helps utilities to increase network reliability while minimising operating costs of overhead MV networks. The exceptional small footprint and light weight of the device enables a quick and easy installation and fast commissioning. Self-powered from line current, the circuit breaker has the capability for multi-phase fault clearance for both transient and permanent faults. The smart system provides wireless connectivity for remote access and can be easily integrated into utilities SCADA network via a Remote Control Unit (RCU).

Higher availability for your distribution network 

Fusesaver can detect, open and clear a fault in as little as one-half cycle (10ms) and is configurable to either protect or replace the fuse. 


- Fusesaver can be installed in series with the fuse. When it senses a fault current, it will open before the fuse can melt, and clear a transient fault. 

Then the Fusesaver closes again reconnecting supply. If the line is still faulted the fuse will now operate to clear the permanent fault. This is the traditional Open-Close (OC) Fusesaver. 


- Replace the fuse altogether. When installed in this manner, the Fusesaver can perform the same Open-Close functionality to clear a transient fault but can also perform a second "Open" operation (OCO) to clear a permanent fault.

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Improve reliability and safety of overhead distribution lines


Unrivalled technology for advanced protection

- Half-cyle switching (10ms)
- Smart grid-ready with communications module
- Self-powered from low line current (as little as 0.15A)
- Wireless connectivity
- Multi-phase protection operation via peer-to-peer communication
- Multi-phase synchronous manual operation via peer-to-peer communication
- Battery backup auxiliary operation
- Rated for load break and fault make for manual switching
- Delayed operation for manual open/close for load break and load pick-up
- Unique compact design and lightweight (5.5 kg)
- Different mounting options (line clamping, cross-arm, pole mounting)

- Optional SCADA connection via Remote Control Unit (RCU)

Technical Data

Rated voltage
15.5 to 27 kV
Rated power-frequency withstand voltage
Up to 60 kV
Rated lightning impulse withstand voltage
Up to 125 kV
Rated short-circuit making current
Up to 16 kA
Rated normal current
40 to 200 A
Rated short-circuit current
40 to 200 A
Rated short-circuit breaking current
1.5 to 6.3 kA
Number of operating cycles
IEC 62271-100

Quick and easy installation

Watch how quick and easy the Fusesaver can be installed and how UK Power Networks utilised the unique circuit-breaker to reduce the number of maintenance call outs to effectively zero.

UK Power Networks make the best of the unique circuit-breaker


More information

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