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1SVR740884R3300 ABB CM-MPS.41P Three-Phase Monitoring Relay 300-500 V AC
ABB CM-MPS.41P 1SVR740884R3300 is a multifunctional three-phase monitoring relay for 300–500 V AC systems with overvoltage, undervoltage, phase failure, phase sequence and phase unbalance monitoring, two changeover contacts and push-in terminals.
£161.34
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.
Technical Specifications
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| Time Delay | Adjustable | |
|---|---|---|
| Monitored Supply | Three-phase | |
| Signal / Input Range | 300–500 V AC | |
| Monitoring Function | Three-phase supply | |
| Series | CM-MPS | |
| ABB order code | 1SVR740884R3300 | |
| Product group | 310921 – Measuring & Monitoring Relays | |
| Product type | Three-phase monitoring relay | |
| Rated control supply voltage | 3 × 300–500 V AC | |
| Measuring voltage | 300–500 V AC line-to-line | |
| Rated frequency | 50 / 60 Hz | |
| Phase failure monitoring | Yes | |
| Phase sequence monitoring | Selectable | |
| Overvoltage monitoring | Yes | |
| Undervoltage monitoring | Yes | |
| Phase unbalance monitoring | Yes | |
| Start-up delay | 200 ms | |
| Tripping delay | 0 s or adjustable 0.1–30 s | |
| Time function | Selectable ON- or OFF-delay | |
| Output | 2 c/o (SPDT) contacts | |
| Contact rating | 250 V / 4 A | |
| Connection technology | Easy Connect push-in terminals | |
| Housing protection | IP50 | |
| Terminal protection | IP20 | |
| Operating temperature | -25 to +60 °C | |
| Storage temperature | -40 to +85 °C | |
| Mounting type | DIN rail | |
| Width | 22.5 mm | |
| Height | 85.6 mm | |
| Depth | 103.7 mm | |
| Net weight | approx. 0.132 kg |
Frequently Asked Questions
What is the ABB CM-MPS.41P used for?
The CM-MPS.41P is used to monitor three-phase electrical supplies for overvoltage, undervoltage, phase failure, phase sequence and phase unbalance conditions.
What voltage range does the CM-MPS.41P monitor?
The relay operates with a three-phase line-to-line measuring and control supply voltage of 300–500 V AC.
Does the CM-MPS.41P monitor phase sequence?
Yes. Phase sequence monitoring is selectable, allowing the relay to detect an incorrect phase rotation where this function is required.
Can the CM-MPS.41P monitor voltage and phase unbalance?
Yes. The relay monitors overvoltage, undervoltage and phase unbalance in addition to phase failure and selectable phase sequence supervision.
What output contacts does the CM-MPS.41P provide?
The CM-MPS.41P provides two changeover (SPDT) output contacts rated at 250 V / 4 A for signalling and control applications.
Trusted ABB Three-Phase Monitoring Technology
ABB CM three-phase monitoring relays provide dependable supervision of voltage and phase conditions in industrial electrical systems, helping protect motors, machinery and automation equipment against abnormal three-phase supply conditions.
