Designing Reliability into an SF6 Recloser System for Distribution Automation

An automatic circuit recloser has been made available having the features desired for present and future 5kV, 15kV, 25kV and 35kV distribution systems The three phase recloser designated type GIR is designed with a rotating arc interrupter where SF6 gas is used for the interrupter and the insulation. A microprocessor based control unit provides adaptability with presently installed protective devices and is fully adjustable in the field to changing system conditions. The control unit can be interrogated locally or remotely for fault history. Power requirements are so low that the life of the lithium battery is 10 years without the need for a charge circuit. The basic design concepts employed have provided for an increased maintenance interval.