ABB 1SVR750660R0200 CM-IWN.1S Insulation and Earth Fault Monitoring Relay 2 C/O 1-100kΩ 24-240VAC/DC

The ABB CM-IWN.1S insulation and earth fault monitoring relay (SKU: 1SVR750660R0200) continuously monitors insulation resistance in unearthed AC and DC systems, providing two changeover output contacts and a wide supply voltage range of 24–240 VAC/DC. Part of the CM-IWN series, the CM-IWN.1S is designed for industrial control panels, machinery, and critical electrical installations where early detection of insulation degradation is essential to prevent equipment damage and personnel hazards. Its compact 45 mm × 85.6 mm × 104.8 mm DIN-rail housing makes it suitable for space-constrained enclosures.

Technical Specifications

Certifications & Standards

• IEC 61557-8: Insulation monitoring devices for IT systems
• IEC/EN 61557-1: General requirements for electrical safety in low-voltage distribution systems
• IEC/EN 61557-8: Insulation monitoring devices for IT systems (EN harmonised)
• 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 — particular requirements for insulation monitoring devices
• IEC/EN 61326-2: EMC — immunity requirements for industrial electromagnetic environments
• EN 63000: European harmonised standard for RoHS technical documentation
• EN 61326-2: EMC for measurement, control and laboratory equipment
• EN 61557-1: Electrical safety in LV distribution systems — general requirements
• EN 61557-8: Insulation monitoring devices for IT systems (EN)
• IEC 60715: Dimensions of low-voltage switchgear and controlgear — standardised mounting on rails
• UL 508: Industrial control equipment (USA)
• CAN/CSA C22.2 No.14: Industrial control equipment (Canada)
• CE: European conformity marking
• CSA: Canadian Standards Association certification
• cULus: UL recognised for both US and Canadian markets
• CCC: China Compulsory Certification
• UKCA: UK Conformity Assessed marking
• REACH: EU regulation on registration, evaluation, authorisation and restriction of chemicals
• RoHS: Restriction of Hazardous Substances directive compliant

Applications & Use Cases

• Continuous insulation resistance monitoring in unearthed (IT) AC and DC power systems
• Early fault detection in industrial machinery, control panels, and process automation systems
• Protection of medical equipment power supplies and operating theatre electrical systems
• Monitoring of photovoltaic (PV) and battery energy storage DC systems
• Alarm and shutdown triggering in offshore, marine, and mining electrical installations
• Building automation and critical infrastructure panels requiring IEC 61557-8 compliance