Izoliacijos monitoringo prietaisas IR425-D4-1

 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. 

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) 

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 

Nominal system voltage* Un DC/AC 0…300 V, 15…460 Hz 

Supply voltage* US DC 70…300 V/AC 70…300 V, 15…460 Hz 

Response value Ran  1…200 kΩ 

System leakage capacitance Ce  < 20 µF