ABB 1SVR730784R2300 CM-PSS.31S Three-Phase Monitoring Relay 2 C/O 0.1-30s 3x380V AC Phase Monitoring Relay

The ABB CM-PSS.31S (SKU: 1SVR730784R2300) is a three-phase monitoring relay designed to protect motors, transformers, and industrial loads against phase faults including phase failure, phase sequence errors, and phase asymmetry. Rated at 3×380V AC with a 2 C/O output and an adjustable time delay of 0.1–30 seconds, the CM-PSS.31S provides reliable protection in demanding control panel environments.

Technical Specifications

Certifications & Standards

• CE: Conformité Européenne — meets EU safety, health, and environmental requirements
• UKCA: UK Conformity Assessed — compliant for Great Britain market
• cULus: Listed to both UL and CSA standards for North American markets
• UL 508: Standard for industrial control equipment
• CCC: China Compulsory Certification for the Chinese market
• CSA: Canadian Standards Association certification
• CAN/CSA C22.2 No.14: Canadian standard for industrial control equipment
• IEC/EN 60255-27: Measuring relays and protection equipment — product safety requirements
• IEC/EN 61000-6-2: Electromagnetic compatibility — immunity for industrial environments
• IEC/EN 61000-6-3: Electromagnetic compatibility — emission standard for residential/light industrial environments
• IEC/EN 63000: Technical documentation for the assessment of electrical and electronic products regarding restricted substances
• IEC 60715: Dimensions of low-voltage switchgear and controlgear — DIN rail mounting
• EN 60255 / EN 61000-6: European standards for measuring relays and EMC
• RoHS: Restriction of Hazardous Substances — compliant with EU Directive 2011/65/EU
• REACH: Registration, Evaluation, Authorisation and Restriction of Chemicals — EU compliance

Applications & Use Cases

• Motor protection against phase failure, incorrect phase sequence, and phase asymmetry
• Protection of three-phase loads in industrial automation control panels
• Pump, compressor, and conveyor motor protection systems
• Generator and transformer monitoring in power distribution
• Building automation and HVAC motor protection applications

Frequently Asked Questions

What does the CM-PSS.31S monitor?
The ABB CM-PSS.31S monitors three-phase AC supplies for phase failure, incorrect phase sequence, and phase asymmetry, triggering its 2 C/O output contacts upon a fault condition.

What is the adjustable time delay range?
The time delay is adjustable from 0.1 to 30 seconds, allowing engineers to set appropriate response times to avoid nuisance tripping.

Is the CM-PSS.31S suitable for DIN rail mounting?
Yes. The CM-PSS.31S is compliant with IEC 60715 and is designed for standard 35 mm DIN rail installation inside control panels.

What certifications does the CM-PSS.31S carry?
The relay holds CE, UKCA, cULus, UL 508, CCC, CSA, CAN/CSA C22.2 No.14, RoHS, and REACH certifications, making it suitable for global deployment.