AC/DC insulation monitor ISOMETER® IR425-D4

DC2 NO/NCDIN rail

Insulation monitoring device for AC and DC IT systems Application control circuits According to IEC 61557-8 Two separately configurable response values Multi-functional LC display The ISOMETER® of the IR425 series is designed to monitor the insulation resistance of un­earthed AC/DC control circuits (IT systems) 0…300 V. DC components existing in AC/DC systems do not influence the operating characteristics. An external supply voltage allows de-energized systems to be monitored too. Features Insulation monitoring for AC/DC control circuits 0…300 V Two separately adjustable response values Preset function (automatic setting of basic parameters) Connection monitoring system/earth LEDs: Power On, Alarm 1, Alarm 2 Internal/external test/reset button Two separate alarm relays (one changeover contact each) N/O or N/C operation, selectable Fault memory behaviour, selectable Self monitoring with automatic alarm Multi-functional LC display Adjustable response delay Two-module enclosure (36 mm) Push-wire terminal (two terminals per connection) Applications AC/DC control circuits in the industrial sector, mechanical engineering, power plants, elevators, automation systems etc. AC/DC control and auxiliary circuits in accordance with DIN EN 60204-1 “Electrical equipment of machines”, IEC 60204-1, EN 60204-1 AC/DC auxiliary circuits in accordance with DIN VDE 0100-725 (VDE 0100-725) Smaller AC/DC IT systems such as lighting systems