VSM?series?of?indoor?high?voltage?vacuum?circuit?breaker?is?adopted?front?and?rare?construction?for?their?permanent?magnetic?and?vacuum?interrupters.?The?main?conducting?circuit?is?with?floor-standing?type,?the?upper?and?lower?outlet?terminal?and?vacuum?interrupters?are?installed?in?one?insulation?house.?The?insulation?house?is?casted?with?epoxy?resin?material?by?APG?technology,?which?can?protect?the?surface?of?the?vacuum?interrupters?against?dust?accumulation?and?impact.?It?also?has?good?insulation?property?under?humid,?hot?and?pollution?ambient?condition.

The?vacuum?circuit?breaker?with?permanent?mechanism?is?air-insulated,?used?for?indoor?installation?for?different?kind?of?power?load,?it?is?suitable?for?electrical?net?construction?and?reconstruction?project?in?municipal?net,?rural?net,?mineral?and?railway?net?system,?especially?used?in?that?fields?which?require?frequently?switching?and?have?some?requirement?for?short?circuit?operation?cycles.?This?product?was?introduced?by?some?international?advance?technique?and?processing?technology?with?characteristics?of?intelligence,?high?reliability,?long?endurance?and?free?maintenance?etc.??