ABB 1SVR730670R0200 CM-IWS.2S Insulation and Earth Fault Monitoring Relay 1 C/O 1-100kΩ 24-240VAC/DC

The ABB CM-IWS.2S insulation and earth fault monitoring relay (SKU: 1SVR730670R0200) continuously monitors the insulation resistance of unearthed AC, DC, and mixed electrical systems, providing a single changeover (1 C/O) output contact when insulation resistance falls below the set threshold. Designed for control panels and industrial automation environments, the CM-IWS.2S supports a wide monitoring range of 1–100 kΩ and operates across a broad supply voltage range of 24–240V AC/DC, making it suitable for diverse global applications.

Technical Specifications

Certifications & Standards

• IEC 61557-8: Insulation fault location in IT systems
• IEC/EN 61557-1: General requirements for measuring and monitoring devices
• IEC/EN 61557-8: Insulation monitoring devices for IT systems
• IEC/EN 63000: Technical documentation for the assessment of electrical and electronic products with respect to the restriction of hazardous substances
• IEC/EN 61326-2-4: EMC requirements for equipment used in industrial locations
• EN 63000: European harmonised standard for RoHS technical documentation
• EN 61326-2: EMC requirements — particular requirements
• EN 61557-1: Measuring and monitoring devices — general requirements
• EN 61557-8: Insulation monitoring devices for IT systems
• UL 508: Industrial control equipment (USA)
• CAN/CSA C22.2 No.14: Industrial control equipment (Canada)
• CSA: Canadian Standards Association certification
• cULus: Combined UL and CSA mark for North American markets
• CE: European conformity marking
• UKCA: UK Conformity Assessed marking for the British market
• CCC: China Compulsory Certification
• REACH: EU regulation on chemicals — compliance confirmed
• RoHS: Restriction of Hazardous Substances — compliant

Applications & Use Cases

• Continuous insulation resistance monitoring in unearthed IT power systems
• Earth fault detection in industrial control panels and switchgear
• Protection of machines, motors, and generators in manufacturing environments
• Building automation systems requiring wide-range voltage monitoring
• Medical, offshore, and critical infrastructure installations demanding high electrical safety