MAIN CHARACTERISTICS range VIGILOHM range of product VIGILOHM product name VIGILOHM IM device short name IM400 product or component type INSULATION MONITORING DEVICE device application LARGE NETWORK earthing system IT language CHINESE COMPLEMETARY CHARACTERISTICS network rated voltage 0...480 V AC 45...440 HZ DEVICE CONNECTED TO PHASE type of measurement network insulation resistance : 10 Ohm...10 MOhm local signalling GREEN INDICATOR LIGHT SATISFACTORY INSULATION RESISTANCE threshold setting alarm : 0.1...500 kOhm time delay range SIGNALLING CIRCUIT 0...7200 S response time