Why Choose the ABB CM-MPN.52S Three-Phase Monitoring Relay?
The ABB CM-MPN.52S, order code 1SVR750487R8300, is a multifunctional three-phase monitoring relay designed to supervise critical phase and voltage conditions in industrial three-phase electrical systems. As part of the ABB CM-MPN three-phase monitoring relay series, it monitors phase failure, phase sequence, overvoltage, undervoltage and phase unbalance to help protect motors, machinery and automation equipment.
The CM-MPN.52S operates directly from the monitored circuit with a 3 × 350–580 V AC line-to-line rated control supply and measuring voltage. It uses the TRMS measuring principle, while adjustable thresholds for overvoltage, undervoltage and phase unbalance allow the monitoring characteristics to be matched to the installation. Phase sequence monitoring can be switched off, and automatic phase sequence correction is configurable.
With two configurable changeover (SPDT) output contacts, a 200 ms start-up delay and an adjustable tripping delay of 0 or 0.1–30 s, the CM-MPN.52S provides flexible signalling and control. Its screw connection technology, 45 mm housing and DIN-rail mounting make it suitable for robust integration into industrial control panels.
Key Advantages
- Multifunctional three-phase voltage and phase monitoring.
- 3 × 350–580 V AC line-to-line measuring and supply range.
- Monitors overvoltage, undervoltage, phase failure and phase unbalance.
- Selectable phase sequence monitoring helps detect incorrect phase rotation.
- Configurable automatic phase sequence correction provides additional system flexibility.
- TRMS measuring principle supports dependable voltage supervision.
- Adjustable thresholds allow monitoring to be tailored to the application.
- Adjustable 0 or 0.1–30 s tripping delay helps accommodate temporary supply variations.
- Configurable dual changeover outputs support common or separate signalling.
- Robust screw terminals provide secure industrial wiring connections.
Key Features
- ABB CM-MPN multifunctional three-phase monitoring relay.
- 350–580 V AC line-to-line measuring range.
- Powered directly by the measuring circuit.
- 50/60 Hz rated frequency.
- TRMS measuring principle.
- Phase failure detection.
- Selectable phase sequence monitoring.
- Configurable automatic phase sequence correction.
- Overvoltage and undervoltage monitoring.
- Phase unbalance monitoring.
- Adjustable overvoltage, undervoltage and phase unbalance thresholds.
- 200 ms start-up delay.
- Selectable ON- or OFF-delay with 0 or 0.1–30 s tripping delay.
- 2 × 1 c/o or 1 × 2 c/o (SPDT) contacts, configurable.
- Output contacts rated at 250 V / 4 A.
- Screw terminal connection technology.
- 3 LED indicators for operational status.
- Compact DIN-rail mounting design.
Reliable Three-Phase Power Monitoring for Industrial Systems
Three-phase monitoring relays continuously supervise incoming electrical supplies and provide a switching response when monitored parameters move outside configured limits. The ABB CM-MPN.52S monitors voltage levels, phase presence, phase sequence and phase balance, helping protect three-phase motors, machinery and automation equipment against potentially damaging supply conditions.
The 350–580 V AC line-to-line range makes the CM-MPN.52S suitable for a broad range of industrial three-phase systems. Configurable output operation allows the relay contacts to provide a common signal or separate signals, while adjustable thresholds and timing functions enable the response to be matched to the requirements of the installation.
Typical Applications
- Three-phase motor and machinery protection.
- Industrial mains and power supply supervision.
- Phase failure and phase sequence detection.
- Overvoltage and undervoltage monitoring.
- Phase unbalance supervision.
- Pumps, compressors, fans and conveyors.
- Industrial automation and process equipment.
- Electrical control panels and switchboards.
