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CM-MPS.21S

The ABB CM‑MPS.21S is a multifunctional three‑phase monitoring relay used in industrial and automation electrical systems to continuously monitor the health and quality of three‑phase power supply. It detects and protects against electrical abnormalities such as phase failure, incorrect phase sequence, over‑ and undervoltage, phase unbalance, and interrupted neutral. The device provides adjustable monitoring thresholds and delay settings to suit different control requirements.

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Key Specifications General Product Type: Three‑phase monitoring relay Model: CM‑MPS.21S ABB Part Number: 1SVR730885R3300 Function: Phase failure, phase sequence, over‑ & undervoltage, phase unbalance, interrupted neutral monitoring Mounting: DIN‑rail TH35/TH35‑7.5 Electrical Rated Control Supply Voltage / Measuring Voltage: 180 – 280 V AC, 50/60 Hz Output Contacts: 2 changeover (2 c/o / SPDT) Contact Rating: 250 V AC / 4 A Rated Operational Currents: AC‑12: ~4 A @ 230 V AC‑15: ~3 A @ 230 V DC‑12: ~4 A @ 24 V DC‑13: ~2 A @ 24 V Minimum Switch Capacity: 24 V / 10 mA Monitoring & Timing Adjustable Trip Delay: Instantaneous or 0.1 – 30 s Start‑up Delay: ~0.2 s Adjustable Threshold Values for Phase Conditions Mechanical Terminal Type: Screw / cage connection Mounting Position: Any Connecting Capacity (wire size): flexible up to ~2.5 mm², rigid up to ~4 mm² Overvoltage Category: III Pollution Degree: 3 Physical Width: ~22.5 mm Height: ~85.6 mm Depth: ~103.7 mm Weight: ~0.146 kg Environmental & Standards Operating Temperature: approx. −25 °C to +60 °C Degree of Protection: Housing IP50, terminals IP20 Certifications: IEC/EN 60255‑1, IEC/EN 61000 series EMC, CAN/CSA C22.2 No.14, UL508, CE, RoHS compliant