ABB 1SVR730884R3300 CM-MPS.41S Three-Phase Monitoring Relay 2C/O 300-500V AC 0.1-30s Phase Sequence Failure Protection

The ABB CM-MPS.41S (SKU: 1SVR730884R3300) is a three-phase monitoring relay designed to protect motors, machinery, and control panels against phase sequence errors, phase failure, and asymmetry in three-phase power systems rated 300–500V AC. Part of ABB's trusted CM-MPS series, the CM-MPS.41S features a dual change-over (2C/O) output relay and an adjustable time delay of 0.1 to 30 seconds, making it ideal for demanding industrial automation environments.

Technical Specifications

Certifications & Standards

• DNV GL: Approved for marine and offshore applications
• IEC/EN 63000: Technical documentation for RoHS compliance
• IEC/EN 60255-27: Measuring relays and protection equipment mechanical requirements
• IEC/EN 61000-6: Electromagnetic compatibility generic standards
• IEC 60715: Dimensions for DIN rail mounting
• EN 63000: European harmonized standard for RoHS technical documentation
• EN 60255-27: European standard for measuring relays mechanical requirements
• EN 61000-6: European EMC generic standards
• UL 508: Industrial control equipment (UL Listed)
• CSA C22.2 No. 14: Industrial control equipment (CSA certified)
• CSA: Canadian Standards Association certification
• REACH: Compliant with EU chemical safety regulation
• RoHS: Restriction of Hazardous Substances compliant
• cULus: Combined UL and CSA approval for US and Canada
• CCC: China Compulsory Certification
• CE: European conformity marking
• UKCA: UK Conformity Assessed marking for Great Britain market

Applications & Use Cases

• Motor protection against phase loss, phase sequence reversal, and voltage asymmetry
• Industrial control panels monitoring three-phase supply integrity
• HVAC systems and pump stations requiring phase supervision
• Marine and offshore power distribution (DNV GL approved)
• Manufacturing automation lines with critical three-phase machinery
• Building management systems protecting compressors and large HVAC units

Frequently Asked Questions

What voltage range does the CM-MPS.41S monitor?
The CM-MPS.41S monitors three-phase supplies from 300 to 500V AC across phases L1, L2, and L3.

What does the 2C/O output mean?
2C/O means two changeover relay outputs — each output has a normally open (NO) and normally closed (NC) contact, providing flexible wiring options for fault signalling or machine shutdown.

Is the CM-MPS.41S approved for marine applications?
Yes. The CM-MPS.41S carries DNV GL approval, making it suitable for marine and offshore installations.

Can the time delay be adjusted?
Yes. The response time delay is fully adjustable between 0.1 and 30 seconds, allowing engineers to tune trip response to suit their application.