... APC≥ 65dBMating Cycles: 1000timesThe high voltage ground protection of frame is connected with the metal sheath,and the earth wire ... mm².The high voltage ground protection is insulated against the frame, Insulation Resistance≥ 1000M/500V (DC )Withstanding Voltage (between ... the high voltage ground protection and the frame)3000V (DC) /min no break down or flying-arcWorking ...