Bender - IR425-D4-1 - ISOMETER® Insulation Monitoring Device for AC/DC Control

The Bender IR425-D4-1 is an insulation monitoring device designed to monitor the insulation resistance of ungrounded (IT) AC/DC control circuits with voltages up to 300 V. Key features include:

• Monitoring Capability: Continuously monitors the insulation resistance in AC/DC control circuits ranging from 0 to 300 V, ensuring early detection of insulation faults.

• Adjustable Response Values: Features two separately adjustable response values, allowing for customizable alarm thresholds to suit specific application requirements.

• Display: Equipped with a multi-functional LCD for real-time monitoring and parameter configuration.

• Alarm Relays: Includes two separate alarm relays with one changeover contact each, configurable for normally open (N/O) or normally closed (N/C) operation.

• Test and Reset Functions: Provides internal and external test/reset buttons for verifying device functionality and resetting alarms.

• Connection Monitoring: Monitors the connection between the system and earth, enhancing system safety.

• Standards Compliance: Designed in accordance with IEC 61557-8 standards for insulation monitoring devices.

• Compact Design: Housed in a two-module enclosure (36 mm) with push-wire terminals, facilitating easy installation in control panels.

Applications:

Ideal for use in AC/DC control circuits within industrial sectors such as mechanical engineering, power plants, elevators, and automation systems. Also suitable for AC/DC auxiliary circuits in accordance with DIN EN 60204-1 and smaller AC/DC IT systems like lighting systems.