ABB CM-IWM.10 1SVR470670R1000 Insulation Monitoring Relay

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Product Model

ABB CM-IWM.10 Insulation Monitoring Relay
Order Code: 1SVR470670R1000

Product Overview

The ABB CM-IWM.10 is an insulation monitoring relay designed for DC or AC IT systems (isolated power systems). It continuously monitors the insulation resistance of the system to ground and triggers an alarm or relay output when the insulation resistance falls below a set threshold, helping prevent electrical faults and reduce the risk of electric shock. It is suitable for industrial, building, medical, and power systems with high insulation safety requirements.

Technical Specifications

• Model: CM-IWM.10

• Order Code: 1SVR470670R1000

• Operating Voltage: 24…230 V AC/DC

• Insulation Resistance Measurement Range: 0…500 kΩ

• Relay Output: 1 changeover contact (SPDT)

• Trip Delay: Adjustable 0…10 s

• Alarm Threshold: Triggered when insulation resistance drops below set value

• Response Time: <1 s

• Ambient Temperature: –20 °C … +60 °C

• Protection Class: IP20

• Mounting: DIN rail

• Display & Operation: LED status indicator / rotary knob for threshold adjustment

• Standards Compliance: IEC 61557-8

Advantages & Key Features

1. Real-time insulation monitoring: Continuously monitors IT systems and provides early warning.

2. Enhanced safety: Automatic alarm or relay switching when insulation resistance is below threshold.

3. Wide voltage range: Supports 24…230 V AC/DC for flexible industrial and building applications.

4. Easy installation: DIN rail mounting with LED indicators for convenient operation and monitoring.

5. Adjustable threshold and delay: Users can set alarm insulation resistance and response delay as needed.

6. High reliability: Industrial-grade design suitable for temperature, humidity, and vibration conditions.

Application Areas

• Industrial IT systems (isolated power systems)

• Building electrical distribution systems

• Medical equipment and hospital electrical systems

• Wind power and photovoltaic power systems

• Automation control systems

• Safety-critical systems requiring insulation monitoring

Precautions

1. Confirm system type (AC/DC IT system) and operating voltage before installation.

2. Ensure stable DIN rail mounting and avoid humid or corrosive environments.

3. Set threshold and delay according to system requirements to avoid false alarms.

4. Regularly check relay operation and insulation status for system safety.

5. Do not disassemble the device while energized to avoid electric shock.

6. Ensure relay outputs are compatible with the control devices to prevent electrical overload.

The structure and details of the product：

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