GE VAT2000 Instruction Manual

Also see for VAT2000 Series: Instruction manual Instruction manual

Contents

8. Maintenance and Inspection8-2(2) Periodic inspectionsTable 8-2Inspection item Inspection details and workVAT2000 appearance Check the state of dirt and dust on the vent or heatsink, and clean if necessary.VAT2000 interior Check the state of dirt and dust on the PCB and inside the equipment, andclean if necessary.Terminal block Tighten the terminal block screws if loose.Cooling fan Replace the fan every three years.Electrolytic capacitor Confirm that there is no liquid leaking or sheath discoloration.Insulation resistanceinspectionDo not perform a megger test on the VAT2000. When doing a megger test onthe external circuit, disconnect all wires connected to the VAT2000.Encoder Confirm that there is no looseness or play in the bearings or couplings.The bearings are durable parts. This is approx. 10,000 hours at 6000rpm, andapprox. 30,000 hours at 3000rpm.They must be replaced periodically.(3) Inspection of spare VAT2000The inspection shown in Table 8-2 must also be performed for spare VAT2000 that are leftconnected but are not used in normal operation. The operation of the VAT2000 must be checkedevery six months by turning the power on.8-2 Measuring devicesAs the voltage and current on the input and output sides include high harmonics, the measured value willdiffer according to the measuring device. When measuring with a device for commercial frequencies,measure with the following circuits and noted measuring devices.W 1 W 4W 2 W 5W 3V 1V 1V 2W 1 W 6A 1 A 6totoV 2W 6A 1 A 4A 2 A 5A 3 A 6MM ov in g iro n ty pe Vo ltm e te r (((())))P ow er S up plyM ov in g iro n ty pe A m m ete rR e ctifier typ e Vo ltm e te rE lec tro dy n am om e ter ty pe p ow e r m e terIn v erte rFig. 8-1 Measurement circuit example