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1SVR740884R1300 ABB CM-MPS.31P Three-Phase Monitoring Relay 160–300 V AC
ABB CM-MPS.31P (1SVR740884R1300) multifunctional three-phase monitoring relay with 160–300 V AC measuring range, phase failure and sequence detection, adjustable overvoltage, undervoltage and phase unbalance monitoring, two changeover outputs, adjustable 0.1–30 s tripping delay and push-in terminals for industrial electrical protection.
£161.34
Why Choose the ABB CM-MPS.31P Three-Phase Monitoring Relay?
The ABB CM-MPS.31P (order code 1SVR740884R1300) is a highly reliable multifunctional three-phase monitoring relay designed to protect industrial electrical equipment against abnormal three-phase supply conditions. As part of the ABB CM-MPS measuring and monitoring relay series, it continuously monitors phase failure, phase sequence, phase unbalance, overvoltage and undervoltage, helping prevent equipment damage and unplanned production downtime.
This advanced monitoring relay provides comprehensive three-phase supply supervision with adjustable voltage thresholds and selectable phase sequence monitoring. Its configurable ON or OFF tripping delay allows users to adapt the response to different industrial applications, reducing unnecessary switching caused by brief voltage disturbances. The relay features two changeover output contacts for signalling and controlling external equipment.
With a rated control supply and measuring voltage of 3 × 160–300 V AC at 50/60 Hz, the ABB CM-MPS.31P is designed for three-phase electrical systems operating within this voltage range. Its compact 22.5 mm DIN rail-mounted housing and ABB Easy Connect push-in terminals simplify installation inside electrical control panels, motor control centres and industrial automation cabinets.
Key Advantages
- Comprehensive three-phase monitoring and protection for industrial electrical systems.
- Detects phase failure, incorrect phase sequence and phase unbalance.
- Monitors overvoltage and undervoltage conditions to help protect connected equipment.
- 3 × 160–300 V AC measuring range suitable for compatible three-phase supply systems.
- Adjustable voltage monitoring thresholds for application-specific protection.
- Selectable ON or OFF tripping delay with an adjustable range of 0.1–30 s or instantaneous operation.
- Two changeover relay contacts provide flexible signalling and control options.
- ABB Easy Connect Technology enables fast, maintenance-free wiring with push-in terminals.
- Compact 22.5 mm housing width saves space inside electrical control cabinets.
- Helps minimise motor damage, equipment faults and costly production interruptions.
Key Features
- ABB CM-MPS multifunctional three-phase monitoring relay series.
- 3 × 160–300 V AC rated control supply and measuring voltage.
- 50/60 Hz rated supply frequency.
- Integrated phase failure detection.
- Selectable phase sequence monitoring.
- Adjustable overvoltage and undervoltage monitoring.
- Integrated phase unbalance detection with adjustable threshold.
- 2 changeover (SPDT) relay output contacts.
- 250 V AC / 4 A contact rating.
- Instantaneous or adjustable 0.1–30 s tripping delay.
- Selectable ON-delay or OFF-delay operation.
- Front-mounted adjustment controls for monitoring parameters.
- Integrated LED indicators for supply, fault and relay status.
- Push-in connection terminals using ABB Easy Connect Technology.
- Compact DIN rail-mounted enclosure.
- Optional sealable transparent cover to protect settings against unauthorised adjustment.
- Designed for reliable operation in industrial electrical environments.
Technical Specifications
- Manufacturer: ABB
- Series: CM-MPS Three-Phase Monitoring Relays
- Model: CM-MPS.31P
- ABB order code: 1SVR740884R1300
- Product group: 310921 – Measuring & Monitoring Relays
- Product type: Multifunctional three-phase monitoring relay
- Rated control supply voltage: 3 × 160–300 V AC
- Measuring voltage range: 160–300 V AC (line-to-line)
- Rated frequency: 50/60 Hz
- Monitored system: Three-phase AC
- Monitoring functions: Phase failure, phase sequence, phase unbalance, overvoltage and undervoltage
- Overvoltage threshold: Adjustable
- Undervoltage threshold: Adjustable
- Phase unbalance threshold: Adjustable
- Phase sequence monitoring: Selectable
- Tripping delay: 0 s or 0.1–30 s
- Delay function: Selectable ON or OFF tripping delay
- Start-up delay: 200 ms
- Relay outputs: 2 changeover contacts (2 SPDT)
- Contact rating: 250 V AC / 4 A
- Rated operational current AC-12: 4 A at 230 V AC
- Rated operational current AC-15: 3 A at 230 V AC
- Rated operational current DC-12: 4 A at 24 V DC
- Rated operational current DC-13: 2 A at 24 V DC
- Terminal technology: Push-in / screwless terminals
- Connection system: ABB Easy Connect Technology
- Mounting type: DIN rail mounting
- Housing width: 22.5 mm
- Dimensions (H × W × D): 85.6 × 22.5 × 103.7 mm
- Protection rating: IP50 housing / IP20 terminals
- Operating ambient temperature: −25 to +60 °C
- Storage temperature: −40 to +85 °C
- Rated insulation voltage: 600 V
- Approximate net weight: 0.133 kg
- GTIN / EAN: 4016779852036
- Applicable standards: IEC/EN 60255-27, IEC/EN 61000-6-2, IEC/EN 61000-6-3, UL 508 and CAN/CSA C22.2 No. 14
Reliable Three-Phase Monitoring for Industrial Electrical Systems
Three-phase monitoring relays such as the ABB CM-MPS.31P continuously evaluate the electrical condition of a three-phase power supply. Industrial motors, pumps, compressors and production machinery depend on stable voltage levels and correct phase relationships for reliable operation. Phase loss, incorrect phase sequence, excessive voltage imbalance or abnormal supply voltage can cause overheating, reduced performance and premature equipment failure.
The CM-MPS.31P detects these conditions and changes the state of its relay outputs when a monitored parameter exceeds its configured threshold. The output contacts can be integrated into contactor control circuits, PLC inputs or alarm systems, allowing connected equipment to be disconnected or a warning to be generated. Its adjustable overvoltage, undervoltage and phase unbalance thresholds allow protection settings to be adapted to the operating requirements of the installation.
The selectable ON or OFF tripping delay helps coordinate the relay response with industrial processes and reduce unwanted switching during short disturbances. Its dual changeover contacts enable separate control and signalling functions, while the compact enclosure and push-in terminals support efficient panel assembly and maintenance. The CM-MPS.31P is therefore a practical monitoring solution for industrial automation engineers, machine builders and electrical maintenance professionals working with compatible three-phase power systems.
Typical Applications
- Three-phase electric motor protection and monitoring.
- Industrial motor control centres and electrical distribution panels.
- Pump stations and water treatment equipment.
- Compressors and industrial refrigeration machinery.
- Conveyor systems and material handling equipment.
- Industrial fans, blowers and ventilation systems.
- Manufacturing and production machinery.
- Phase sequence verification for rotating equipment.
- Voltage imbalance monitoring in industrial power systems.
- PLC-based automation and equipment fault signalling.
- OEM machinery and industrial control panel manufacturing.
- Preventative monitoring of three-phase electrical installations.
Technical Specifications
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| Monitoring Function | Three-phase supply | |
|---|---|---|
| Monitored Supply | Three-phase | |
| Signal / Input Range | 160–300 V AC | |
| Time Delay | Adjustable |
Frequently Asked Questions
What is the ABB CM-MPS.31P used for?
The ABB CM-MPS.31P is a multifunctional three-phase monitoring relay designed to detect phase failure, incorrect phase sequence, phase unbalance, overvoltage and undervoltage. It helps protect industrial motors and electrical equipment against abnormal supply conditions.
What voltage range does the ABB CM-MPS.31P monitor?
The CM-MPS.31P operates with a rated three-phase control supply and measuring voltage of 3 × 160–300 V AC at 50/60 Hz. The specified voltage range refers to the line-to-line voltage of the monitored supply.
Can the CM-MPS.31P detect phase failure and incorrect phase sequence?
Yes. The relay provides phase failure detection and selectable phase sequence monitoring. These functions help prevent equipment from operating under unsuitable three-phase supply conditions, including incorrect phase rotation.
Does the ABB CM-MPS.31P monitor overvoltage and undervoltage?
Yes. The CM-MPS.31P includes adjustable overvoltage and undervoltage monitoring. When the measured supply voltage exceeds the configured limits, the relay can change its output state to initiate protective control or fault signalling.
What is the adjustable tripping delay range?
The ABB CM-MPS.31P supports instantaneous tripping or an adjustable delay of 0.1–30 s. The tripping delay can be configured for ON-delay or OFF-delay operation according to the application requirements.
How many output contacts does the CM-MPS.31P have?
The relay provides two changeover (SPDT) output contacts, each with a specified contact rating of 250 V AC / 4 A. These contacts can be used for control circuits, fault indication or PLC signalling within their rated switching limits.
What type of terminals does the ABB CM-MPS.31P use?
The CM-MPS.31P uses ABB Easy Connect push-in terminals. This screwless connection technology provides convenient, maintenance-free wiring and helps reduce installation time in electrical control panels.
Can the CM-MPS.31P monitor phase unbalance?
Yes. The relay detects phase voltage unbalance and provides an adjustable response threshold. This helps identify uneven three-phase supply conditions that could adversely affect motor performance and equipment reliability.
Does the CM-MPS.31P require a separate power supply?
No separate auxiliary supply is required for normal operation. The rated control supply voltage is also the three-phase measuring voltage, with an operating range of 160–300 V AC line-to-line.
Does this model monitor an interrupted neutral conductor?
No. The ABB CM-MPS.31P does not include interrupted neutral monitoring. Its specified monitoring functions are phase failure, phase sequence, phase unbalance, overvoltage and undervoltage.
Where is the ABB CM-MPS.31P typically installed?
The relay is designed for DIN rail mounting inside electrical control panels. Its compact 22.5 mm housing width makes it suitable for motor control centres, industrial automation cabinets and three-phase equipment protection systems.
Trusted by Industrial Automation and Electrical Protection Professionals
ABB CM-MPS three-phase monitoring relays provide comprehensive electrical supply supervision for industrial motors, machinery and automation systems. With adjustable monitoring thresholds, selectable tripping delays, dual changeover outputs and maintenance-free push-in terminals, the CM-MPS.31P offers a dependable solution for improving equipment protection, operational reliability and control system integration.
