Fusesaver, the world’s fastest medium-voltage (MV) outdoor vacuum circuit-breaker, is the most cost-effective solution for optimizing reliability while minimizing operating costs of rural overhead MV networks. It is capable of almost completely removing the impacts of temporary faults on lateral lines.
The Fusesaver is a self-powered, electronically controlled, single-phase fault interrupting device that works in partnership with a fuse to protect a lateral or spur line from both transient and permanent faults. The Fusesaver is capable of detecting, opening, and clearing a fault in most cases is less time than it takes for the fuse to melt. The Fusesaver is located on the spur line in series with the fuse.
The Fusesaver is primarily targeted at providing protection and automation of low fault level lines such as spurs or laterals. This is reflected in the Fusesaver ratings and specifications as defined in this purchasing specification. By installing Fusesavers, the utility gains the benefits of improved network availability and reduced maintenance callouts because the Fusesaver prevents transient faults from blowing fuses.
The Fusesaver is mounted on the dead-end of the spur line or feeder line and provides theconnection from the conductor to the partner fuse. These two items constitute the basic Fusesaver installation.
Their operation can be summarised as: The partner fuse protects the spur line from permanent faults and the Fusesaver protects the partner fuse from being blown by transient faults.
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