ABB 1SVR730831R1300 CM-ESS.1S Voltage Monitoring Relay 1C/O 3-600V RMS 220-240V AC Single-Phase

The ABB CM-ESS.1S (SKU: 1SVR730831R1300) is a single-phase voltage monitoring relay designed to protect electrical equipment by continuously supervising supply voltage levels across a wide measurement range of 3–600V RMS. Part of the ABB CM single-phase monitors series, the CM-ESS.1S features a 1 changeover (1C/O) output contact, a rated control voltage of 220–240V AC, and a compact 30 mm wide DIN rail housing — making it ideal for integration into industrial control panels where reliable voltage supervision is essential.

Technical Specifications

Certifications & Standards

• IEC/EN 63000: Technical documentation for the assessment of electrical and electronic products with respect to the restriction of hazardous substances
• IEC/EN 60255-27: Measuring relays and protection equipment — product safety requirements
• IEC/EN 61000-6: Electromagnetic compatibility (EMC) — generic standards
• IEC 60715: Dimensions of low-voltage switchgear and controlgear — standardized DIN rail mounting
• EN 63000: European harmonized standard for RoHS technical documentation
• EN 60255-27: European harmonized standard for measuring relay product safety
• EN 61000-6: European EMC generic standards compliance
• UL 508: Industrial control equipment — UL certification for the US market
• CSA C22.2 No. 14: Industrial control equipment — Canadian Standards Association certification
• CSA: Canadian Standards Association approval
• REACH: Compliance with EU REACH regulation on chemical substances
• RoHS: Restriction of Hazardous Substances — EU Directive 2011/65/EU compliant
• cULus: Combined UL (USA) and CSA (Canada) listing mark
• CCC: China Compulsory Certification for the Chinese market
• CE: European Conformity marking — meets EU safety, health, and environmental requirements
• UKCA: UK Conformity Assessed — post-Brexit certification for the Great Britain market

Applications & Use Cases

• Single-phase mains voltage supervision in industrial control panels and machinery
• Under-voltage and over-voltage protection for sensitive loads and motors
• Pump and compressor protection against supply voltage faults
• Building automation and HVAC system voltage monitoring
• Process industry equipment protection where supply quality is critical
• Integration into safety circuits requiring relay output signalling on voltage fault conditions