Why Choose the ABB CM-MPS.41P Three-Phase Monitoring Relay?
The ABB CM-MPS.41P, order code 1SVR740884R3300, is a multifunctional three-phase monitoring relay designed to supervise critical electrical parameters in three-phase industrial power systems. As part of the ABB CM-MPS three-phase monitoring relay series, it provides dependable monitoring of overvoltage, undervoltage, phase failure, phase sequence and phase unbalance.
The CM-MPS.41P operates directly from the monitored three-phase system, with a rated control supply and measuring voltage of 3 × 300–500 V AC at 50/60 Hz. Adjustable threshold values allow the relay to be configured for the requirements of the installation, while selectable phase sequence monitoring provides additional protection against incorrect phase rotation.
With two changeover (SPDT) output contacts rated at 250 V / 4 A, selectable ON- or OFF-delay operation and an adjustable tripping delay from instantaneous operation to 30 s, the CM-MPS.41P provides flexible signalling and control. ABB Easy Connect push-in terminals and a compact 22.5 mm DIN-rail housing simplify installation in industrial control panels.
Key Advantages
- Multifunctional three-phase voltage and phase monitoring.
- 3 × 300–500 V AC measuring and control supply range.
- Monitors overvoltage and undervoltage conditions.
- Detects phase failure and phase unbalance.
- Selectable phase sequence monitoring helps identify incorrect phase rotation.
- Adjustable threshold values support application-specific protection.
- Selectable ON- or OFF-delay with adjustable tripping time.
- Two changeover contacts provide flexible signalling and control outputs.
- Maintenance-free Easy Connect push-in terminals simplify panel wiring.
Key Features
- ABB CM-MPS multifunctional three-phase monitoring relay.
- 300–500 V AC line-to-line measuring range.
- 50/60 Hz rated supply frequency.
- Overvoltage and undervoltage monitoring.
- Phase failure detection.
- Phase unbalance detection.
- Selectable phase sequence monitoring.
- Adjustable monitoring thresholds.
- 200 ms start-up delay.
- Tripping delay selectable between 0 s and 0.1–30 s.
- Selectable ON- or OFF-delay operation.
- 2 c/o (SPDT) output contacts.
- Output contacts rated at 250 V / 4 A.
- ABB Easy Connect push-in terminal technology.
- Compact DIN-rail mounting design.
Reliable Three-Phase Power Monitoring for Industrial Systems
Three-phase monitoring relays help protect machinery and electrical equipment by continuously supervising the condition of the incoming three-phase supply. The ABB CM-MPS.41P monitors voltage levels, phase presence, phase sequence and phase balance, allowing abnormal supply conditions to be detected before they cause equipment malfunction or damage.
The relay's 300–500 V AC line-to-line range makes it suitable for a wide variety of industrial three-phase systems. Adjustable thresholds and timing functions allow its response to be matched to the installation, while dual changeover outputs enable alarms, contactors or control systems to respond when a monitored condition moves outside the configured limits.
Typical Applications
- Three-phase motor and machinery protection.
- Industrial 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.
