Why Choose the ABB CM-MPN.72P Three-Phase Monitoring Relay?
The ABB CM-MPN.72P (1SVR760489R8300) is a versatile and reliable multifunctional three-phase monitoring relay designed to supervise electrical supply conditions and detect faults in industrial three-phase networks. As part of the ABB CM-MPN measuring and monitoring relay series, it provides comprehensive monitoring of phase failure, phase sequence, phase unbalance, overvoltage and undervoltage to help protect industrial machinery, motors and electrical equipment.
The CM-MPN.72P combines multiple monitoring functions within a single compact device, reducing the need for separate protection relays. Its adjustable voltage thresholds, selectable phase sequence monitoring, automatic phase sequence correction function and configurable relay outputs provide flexible integration into industrial control systems. Adjustable ON-delay and OFF-delay functions allow the relay response to be adapted to different operating conditions, helping minimise unnecessary interruptions caused by temporary voltage fluctuations.
With a three-phase 530–820 V AC rated control supply and measuring voltage, operating at 50/60 Hz, the CM-MPN.72P is suitable for higher-voltage industrial three-phase systems. Its two changeover output contacts, maintenance-free push-in terminals and compact 45 mm-wide DIN rail housing make it a practical solution for electrical distribution panels, motor control centres and industrial automation installations.
Key Advantages
- Comprehensive multifunctional three-phase monitoring within one device.
- 530–820 V AC three-phase measuring and control supply range for industrial electrical systems.
- Detects phase failure, incorrect phase sequence and phase unbalance.
- Provides overvoltage and undervoltage monitoring with adjustable thresholds.
- Automatic phase sequence correction function supports suitable external control arrangements.
- Two configurable changeover contacts enable common or separate fault signalling.
- Adjustable tripping delay from 0.1–30 s helps accommodate temporary supply disturbances.
- Selectable ON-delay or OFF-delay operation for application flexibility.
- ABB Easy Connect Technology push-in terminals simplify installation and wiring.
- Compact 45 mm DIN rail housing conserves electrical cabinet space.
- Integrated monitoring functions help improve equipment protection and operational reliability.
Key Features
- ABB CM-MPN.72P multifunctional three-phase monitoring relay.
- Three-phase 530–820 V AC rated control supply voltage.
- 530–820 V AC line-to-line measuring range.
- 50/60 Hz rated supply frequency.
- Integrated phase failure detection.
- Selectable phase sequence monitoring.
- Automatic phase sequence correction function.
- Overvoltage and undervoltage monitoring with adjustable threshold values.
- Phase unbalance detection for three-phase supply supervision.
- Two changeover (SPDT) output contacts.
- 250 V / 4 A output contact rating.
- Configurable outputs for common fault indication or separate voltage threshold signalling.
- Adjustable tripping delay: instantaneous or 0.1–30 s.
- Selectable ON-delay and OFF-delay functions.
- 200 ms start-up delay.
- Front-panel controls for monitoring function and threshold configuration.
- Maintenance-free push-in terminals using ABB Easy Connect Technology.
- DIN rail mounting for industrial control cabinets.
- 45 mm housing width for compact installation.
- Optional sealable transparent cover to help prevent unauthorised setting changes.
Technical Specifications
- Manufacturer: ABB
- Series: CM-MPN Three-Phase Monitoring Relays
- Model: CM-MPN.72P
- ABB order code: 1SVR760489R8300
- Product type: Multifunctional three-phase monitoring relay
- Rated control supply voltage: 3 × 530–820 V AC
- Measuring voltage: 530–820 V AC (line-to-line)
- Rated frequency: 50/60 Hz
- Monitored system: Three-phase AC network
- Phase failure monitoring: Yes
- Phase sequence monitoring: Selectable
- Automatic phase sequence correction: Selectable
- Overvoltage monitoring: Yes, adjustable threshold
- Undervoltage monitoring: Yes, adjustable threshold
- Phase unbalance monitoring: Yes
- Output contacts: 2 changeover (SPDT) contacts
- Output configuration: 1 × 2 c/o common signal or 2 × 1 c/o separate signals
- Contact rating: 250 V / 4 A
- Start-up delay: 200 ms
- Tripping delay: 0 s or adjustable 0.1–30 s
- Delay functions: Selectable ON-delay or OFF-delay
- Terminal type: Push-in, screwless terminals
- Connection technology: ABB Easy Connect Technology
- Mounting type: DIN rail mounting
- Housing protection rating: IP50
- Terminal protection rating: IP20
- Operating temperature: −25 to +60 °C
- Storage temperature: −40 to +85 °C
- Dimensions (H × W × D): 85.6 × 45 × 104.8 mm
- Net weight: 0.22 kg
- Rated insulation voltage: 1000 V (input circuit)
- Rated impulse withstand voltage: 6 kV (input circuit)
- EAN: 4016779852111
- Product category: Measuring and Monitoring Relays
Reliable Three-Phase Monitoring for Industrial Electrical Systems
Three-phase monitoring relays such as the ABB CM-MPN.72P continuously supervise the condition of electrical supplies to identify faults that could affect connected equipment. Phase failure, incorrect phase sequence, excessive voltage variation and phase unbalance can cause operational problems in industrial motors and machinery. By detecting these conditions, the CM-MPN.72P provides relay output signals that can be used to initiate alarms, interrupt external contactor control circuits or activate other suitable protective actions.
The CM-MPN.72P is particularly useful in higher-voltage three-phase networks requiring a 530–820 V AC line-to-line measuring range. Its multifunctional design enables engineers to configure phase sequence supervision, automatic phase sequence correction signalling and adjustable overvoltage and undervoltage monitoring within one unit. The configurable output contacts and selectable tripping delays allow integration with motor starters, contactors, PLCs and industrial control systems, while push-in terminals simplify installation and maintenance.
Typical Applications
- Industrial three-phase electrical supply monitoring.
- Higher-voltage AC distribution and control systems.
- Three-phase motor protection and control circuits.
- Phase failure and incorrect phase sequence detection.
- Overvoltage and undervoltage monitoring applications.
- Phase unbalance supervision in industrial installations.
- Motor control centres and electrical switchboards.
- Industrial pumps, compressors and ventilation equipment.
- Manufacturing machinery and automated production systems.
- PLC-based alarm and electrical protection systems.
- OEM machinery control panels and industrial automation assemblies.
