AC network insulation monitor ISOMETER® IR420-D4

2 NO/NC

Insulation monitoring device for AC IT systems Application control circuits According to IEC 61557-8 Two separately configurable response values Multi-functional LC display The ISOMETER® IR420-D4 monitors the insulation resistance of unearthed AC control circuits (IT systems) 0…300 V. If the systems to be monitored include DC components, such as switched-mode power supplies or solenoid valves, the display and operating characteristics may be affected. The display and response values apply to pure AC systems. An external supply voltage allows de-energised systems to be monitored too. Features Insulation monitoring for IT control circuits AC 0…300 V Two separately adjustable response values Preset function (automatic assignment 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 message Multi-functional LC display Adjustable response delay Two-module enclosure (36 mm) RoHS-compliant Push-wire terminal (two terminals per connection) Applications AC control circuits in the industrial sector, mechanical engineering, power plants, elevators, automation systems etc. AC control and auxiliary circuits in accordance with IEC 60204-1 / DIN EN 60204-1 Electrical equipment of machines AC auxiliary circuits in accordance with DIN VDE 0100-725 (VDE 0100-725) Smaller AC IT systems such as lighting systems, mobile generators