The Selection of Appropriate Surge Absorber Value Reducing the Switching Surge of VCB for High Voltage Motor and Surge Measurement

고압전동기용 진공차단기의 스위칭 써지를 저감시키는 써지흡수기의 적정치 선정과 써지측정

VCB, with its big arc extinction in very short switching time, produces the high switching surge voltage which may cause the breakdown of motor insulation or acceleration of insulation deterionation. To protect motor winding insulation, we developed the computer algorithm for simulating the surge occurred in VCB by EMTP. And we established the effect of the C-R surge absorber by the surge measurement in the motor-VCB circuit.