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CM-MPS 1SVR430885R3300

The CM‑MPS.21S is a three-phase multifunction monitoring relay from ABB’s CM‑MPS series. It continuously monitors three-phase supply voltage and phase conditions, protecting electrical systems by detecting faults such as phase failure, incorrect phase sequence, over-voltage, under-voltage, and phase unbalance. When a fault occurs, the relay triggers via its output contacts.

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Technical Parameters Parameter Value / Range Rated Supply Voltage 180–280 V AC (line-to-neutral) Frequency 50 / 60 Hz Monitored Conditions Phase failure, Phase sequence, Over-voltage, Under-voltage, Phase unbalance (optional: neutral interruption) Adjustable Thresholds Over-/under-voltage and asymmetry (unbalance) thresholds adjustable Tripping Delay Start-up delay 200 ms; tripping delay adjustable 0.1–30 s Output Contacts 2 changeover contacts (SPDT) Contact Rating AC‑12 (230 V): 4 A; AC‑15 (230 V): 3 A; DC‑12 (24 V): 4 A; DC‑13 (24 V): 2 A; Minimum 24 V / 10 mA Insulation / Surge Withstand Input → output: 600 V; output circuits: 300 V; Impulse withstand: input 6 kV, output 4 kV Protection Housing: IP50; Terminals: IP20; Pollution degree 3; Overvoltage category III Wiring / Terminals Screw-type, double-chamber cage connection; accepts rigid or flexible wire up to 4 mm² Mounting / Dimensions / Weight DIN-rail (TH35‑7.5 or TH35‑15); 22.5 mm × 85.6 mm × 103.7 mm; ~0.146 kg Operating / Storage Temperature Operating: −25 °C … +60 °C; Storage: −40 °C … +85 °C Indicators 3 LEDs for supply and fault status Standards / Approvals Conforms to IEC/EN/UL/CSA standards for measuring and monitoring relays