ABB CM-IWS.1S 1SVR730660R0100 Insulation Monitoring Relay

Product Overview

The ABB CM‑IWS.1S is an industrial-grade insulation monitoring relay designed for continuous monitoring of insulation resistance in unearthed (IT) power systems. When the insulation resistance drops below the set threshold, the relay triggers an alarm or control output to ensure safe system operation. Suitable for AC, DC, or mixed power networks.

Technical Specifications

• Model: CM‑IWS.1S

• ABB Part Number: 1SVR730660R0100

• Type: Insulation Monitoring Relay

• Monitored Parameter: Insulation resistance of unearthed (IT) systems

• Supply Voltage: 24–240 V AC/DC

• Measuring Range: 1–100 kΩ

• Output: 1 changeover contact (SPDT, 1 c/o)

• Contact Rating: 250 V AC / 4 A (typical)

• Frequency Range: DC or 15–400 Hz

• Mounting: DIN rail (IEC/EN 60715)

• Terminal Type: Screw terminals

• Operating Temperature: –25 °C … +60 °C

• Storage Temperature: –40 °C … +85 °C

• Dimensions (W×H×D): 22.5 × 85.6 × 103.7 mm

• Protection Degree: Housing IP50 / terminals IP20

• Indicators: LEDs for supply, fault, and relay status

• Weight: Approx. 0.148 kg

• Certifications: IEC 61557 series, UL, CSA

Advantages and Features

1. Wide Supply Voltage Compatibility
   Operates with 24–240 V AC/DC systems.

2. High Sensitivity
   Monitors insulation resistance from 1–100 kΩ, detecting insulation deterioration or faults.

3. Flexible Output Control
   SPDT relay output for alarms, power disconnection, or PLC/DCS integration.

4. Clear LED Indication
   Quick diagnostics with power, fault, and relay status LEDs.

5. Compact DIN Rail Design
   Easy installation in control panels and switchgear.

6. Wide Frequency and Environment Tolerance
   Works in AC, DC, or mixed systems under standard industrial conditions.

Typical Applications

• Insulation monitoring in IT (unearthed) systems

• Industrial power distribution insulation health check

• Preventive maintenance of electrical equipment

• UPS, server rooms, and DC systems monitoring

• Chemical, manufacturing, and automation system insulation alarm

• PLC/DCS system integration and safety protection

Precautions

1. Ensure the system is an unearthed IT system with supply voltage 24–240 V.

2. Mount properly on DIN rail and secure screw terminals with good grounding.

3. Set threshold values according to system insulation requirements and test before operation.

4. Avoid extreme temperature, humidity, and corrosive environments.

5. Periodically check relay outputs and LED indicators for accurate monitoring.

The structure and details of the product：

Please make an inquiry for more models

ABB TB820V2-eA 3BSE013208R2

ABB AO810V2-eA 3BSE038415R2

ABB AI820-eA 3BSE008544R2

ABB DI821-eA 3BSE008550R2

ABB AO820-eA 3BSE008546R2

ABB DO802-eA 3BSE022364R2

ABB CI801-eA 3BSE022366R2

ABB DI810-eA 3BSE008508R2

ABB AI845-eA 3BSE023675R2

ABB AI801-eA 3BSE020512R2

ABB DI803-eA 3BSE022362R2

ABB DI802-eA 3BSE022360R2

ABB TB40A-eA 3BSE037760R2

ABB CI840A-eA 3BSE041882R2

ABB TB825-eA 3BSE036634R2

ABB BC810K02-eA 3BSE031155R2

ABB PM866K02 3BSE050199R1

ABB PM861AK02 3BSE018160R1

ABB PM866K01 3BSE050198R1

ABB PM851AK01 3BSE066485R1

ABB TB852 3BSC950263R1

ABB PM864AK02 3BSE018164R1

ABB PM856AK01 3BSE066490R1

ABB TK850V007 3BSC95019R1

ABB SB822 3BSE018172R1

ABB PM860AK01 3BSE066495R1

ABB TB850 3BSC950193R1

ABB TK851V010 3BSC950262R1

ABB TK212A 3BSC630197R1

ABB CI867K01 3BSE043660R1

ABB CI861K01 3BSE058590R1

ABB SB821 3BSE018109R1

ABB TB851 3BSC950194R1

ABB MB801V512 3BSE042257R1

ABB PM861AK01-eA 3BSE018157R2

ABB PM861AK02-eA 3BSE018160R2

ABB PM856AK01-eA 3BSE066490R2

ABB PM866K01-eA 3BSE050198R2 6.13

ABB CI867K01 3BSE043660R2

ABB PM851AK01 3BSE066485R2

ABB PM864AK02 3BSE018164R2

ABB CI854AK01 3BSE030220R2

ABB PM860AK01 3BSE066495R2

ABB PM864AK01 3BSE018161R2

ABB PM866K02 3BSE050199R2

ABB TK807F 3BDM000210R1

ABB PM802F 3BSH000002R1

ABB FI840F 3BSH000033R1

ABB EI813F 3BDH000022R1

ABB AM801F 3BDH000040R1

ABB SD812F 3BDH000014R1

ABB AM811F 3BDH000050R1

ABB TK802F 3BDM000213R1

ABB PM803F 3BDH000530R1

ABB FI820F 3BDH000031R1

ABB FI810F 3BDH000030R1

Other best-selling products：