Toshiba HV6FS Instruction Manual

MAINTENANCE Page 29Table 2. Check Points for Inspection (cont’d)Check Point Check Item Check Method Criteria What to doAuxiliarySwitchTerminals looseor disconnectedVisualinspection.Tighten using ascrewdriver.Make sure terminals arenot loose or disconnected.Repair ifdisconnected. Tightenif loose. SeeTable 1 for tighteningtorques.Case/contacts Visualinspection.Make sure there is nodamage or warping.Replace if damagedor warped.ControlCircuitsSmoothmovement ofmotor chargingmechanismEnergize thecontrol circuit.Breaker (motor-operatedtype) should chargequickly and smoothly.If the circuit fails tooperate, check thecause and repair.Terminals looseor disconnectedVisualinspection.Tighten using ascrewdriver.Make sure terminals arenot loose or disconnected.Repair ifdisconnected.Tighten if loose.SeeTable 1 fortightening torques.InsulationResistanceMeasure-mentMeasure maincircuit to groundMegger test at1000V.Resistance should be500MΩ or greater.Measurebetween maincircuit terminalsMegger test at1000V.Resistance should be100MΩ or greater.Measure controlcircuits togroundMegger test at500V.Resistance should be2MΩ or greater.If the insulationresistance is low,wipe off the vacuuminterrupter and otherinsulation surfaceswith a clean drycloth and thenrepeat the test.Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com