Why Choose the ABB CM-MPS.11S Three-Phase Monitoring Relay?
The ABB CM-MPS.11S is a multifunctional three-phase monitoring relay with neutral monitoring designed to supervise critical electrical conditions in industrial three-phase systems. With ABB order code 1SVR730885R1300, it operates directly from the monitored network across a 3 × 90–170 V AC phase-to-neutral range at 50/60 Hz.
The CM-MPS.11S monitors phase failure, phase sequence, overvoltage, undervoltage, phase unbalance and interrupted neutral. Combining these functions in one compact relay helps provide comprehensive supply supervision for motors, pumps, machinery and other three-phase equipment where abnormal phase or voltage conditions need to initiate an alarm, interlock or control response.
A 200 ms start-up delay and selectable ON- or OFF-delay with a tripping time of 0 or 0.1–30 s provide flexible response to supply disturbances. Two changeover (SPDT) output contacts, screw connection technology and a compact 22.5 mm DIN-rail housing make the CM-MPS.11S straightforward to integrate into industrial control panels.
Key Advantages
- Multifunctional supervision of critical three-phase supply conditions.
- Monitors phase failure, phase sequence, overvoltage and undervoltage.
- Provides phase unbalance detection for additional supply supervision.
- Includes interrupted neutral monitoring for three-phase systems with neutral.
- Direct monitoring across a 3 × 90–170 V AC phase-to-neutral range.
- Selectable ON- or OFF-delay with adjustable tripping time.
- Two changeover output contacts provide flexible signalling and control.
- Compact 22.5 mm-wide housing conserves DIN-rail space.
Key Features
- ABB CM-MPS multifunctional three-phase monitoring relay series.
- 3 × 90–170 V AC phase-to-neutral measuring range.
- 90–170 V AC rated control supply voltage, phase-to-neutral.
- 50/60 Hz rated supply frequency.
- Phase failure detection.
- Phase sequence monitoring.
- Overvoltage and undervoltage monitoring.
- Phase unbalance detection.
- Interrupted neutral monitoring.
- 200 ms start-up delay.
- 0 or 0.1–30 s selectable ON- or OFF-delay.
- 2 c/o (SPDT) relay outputs.
- Screw connection technology with double-chamber cage terminals.
- DIN-rail mounting for control-panel installation.
Comprehensive Three-Phase and Neutral Monitoring
Three-phase machinery and electrical systems can be affected by phase loss, incorrect phase rotation, excessive or insufficient voltage, phase unbalance and interruption of the neutral conductor. The ABB CM-MPS.11S combines monitoring of these conditions in a single compact device, allowing connected control equipment to respond when the supply moves outside the required operating conditions.
The relay's 200 ms start-up delay supports stable monitoring following energisation, while the selectable ON- or OFF-delay of 0 or 0.1–30 s allows the response to be adapted to the application. Its two changeover contacts can interface with contactors, PLC inputs, alarms and interlocking circuits.
Typical Applications
- Three-phase motor and machinery monitoring.
- Industrial control and automation panels.
- Phase failure and phase sequence supervision.
- Overvoltage and undervoltage monitoring.
- Phase unbalance detection.
- Interrupted neutral monitoring.
- Pumps, fans, compressors and conveyor systems.
- Industrial power distribution and OEM machinery.
