ISOMETER® IR420-D4

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.

Questions? Contact us!

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.

Questions? Contact us!

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