Profile: Systems Power Engineering Limited manufactures our own range of ASTA certified to IEC 60056 truck mounted retrofit vacuum circuit breakers that directly replace existing truck mounted oil circuit breakers. We provide spares such as fixed & moving contacts, busbars, epoxy bar primary connections, ring type current transformers, voltage transformers, secondary plugs & sockets, trip coils & closing coils and arc control pot assemblies. We are also able to provide spares for overhead line equipment, pole mounted distribution transformers, indoor / outdoor neutral earthing resistors, refurbished HV / LV switchgear, refurbished tap changers such as the ferranti type DS2 and motorization of circuit breaker closing mechanisms.