Electrical safety monitoring device ISOMETER® IRDH275BM-7

for medical IT systemsautomatic

Insulation monitoring device for AC and DC IT systems Application for drives including medium voltage converters up to 15.5 kV In combination with AGH675S-7 and AGH675S- MV15 History memory with real-time clock for storing alarm messages with date and time Galvanically isolated RS-485 interface for data exchange The device combination ISOMETER® IRDH275BM-7 and the coupling device AGH675S-7 or the coupling devices AGH675S-7MV15 is designed to monitor the insulation resistance of unearthed medium voltage systems (IT systems). It is suitable for universal use in 3AC, combined AC/DC and DC systems. AC systems may include extensive DC-supplied loads. The AMPPlus measurement method meets the particular requirements of modern power supplies which often include rectifiers, converters, thyristor-controlled DC drives and directly connected DC components. Taking the system leakage capacitances into account, the IRDH275BM-7 automatically adapts itself to the existing system conditions in order to optimise the measuring time. Insulation monitoring for drives including medium voltage converters up to 15.5 kV Two separately adjustable response values 100 kΩ…10 MΩ AMPPlus measurement method (European patent: EP 0 654 673 B1) Automatic adaptation to the system leakage capacitance Info button to display device settings and the system leakage capacitance History memory with real-time clock to store alarm messages with date and time stamp