isolation brake position indicator (pilot lights,pushbutton switches,indicator lights) Voltage:220V isolation brake position indicator(pilot lights,pushbutton switches,indicator lights) 1.Power-frequency withstand voltage:2.5KV,1min2.Insulating resistance≥2MΩ3.Allowed instantaneous voltage fluctuation:20%4.Comparative tracking index(CTI)≥1005.AC frequency:AC50Hz/60Hz6.Brightness≥60cdm2