Technical Specifications
Parameter / Item Value / Description
Product / Model CM‑MPS.41S three‑phase monitoring relay
Part Number 1SVR730884R3300
Monitored / Supply Voltage (L–L) 300 … 500 V AC, 50/60 Hz
Functions / Monitoring Phase loss detection; Phase sequence (rotation) monitoring; Over‑voltage detection; Under‑voltage detection; Phase unbalance detection
Output Contacts 2 × change‑over contacts (SPDT / 2 c/o)
Contact Rating Up to 250 V AC / 4 A (AC‑12 general load)
230 V AC / 3 A (AC‑15 inductive / motor‑control load)
24 V DC / 4 A (DC‑12)
24 V DC / 2 A (DC‑13)
Minimum Switching Capacity 24 V / 10 mA (suitable for small control signals)
Trip / Delay Settings Startup / Power-on delay: 200 ms
Trip delay (ON or OFF): instantaneous (0 s) or adjustable 0.1 … 30 s
Terminal / Connection Type Screw‑terminal (double‑chamber cage connection)
Dimensions (W × H × D) 22.5 mm × 85.6 mm × 103.7 mm
Net Weight ~ 0.14 kg
Insulation / Impulse Withstand Voltage Input/Output insulation: 600 V; Impulse withstand: Input 6 kV, Output 4 kV
Protection / Housing Rating Housing: IP50; Terminals: IP20
Operating Ambient Temperature –25 °C … +60 °C
Storage Temperature Range –40 °C … +85 °C
Standards & Certifications Compliant with IEC/EN 60255‑27, IEC/EN 61000‑6-2 / 61000‑6-3, CAN/CSA C22.2 No.14, UL 508; UL/CSA contact rating B300
Pollution degree 3, Overvoltage category III
The ABB CM‑MPS.41S is a three‑phase monitoring relay designed to continuously monitor three‑phase supplies for proper phase conditions — including phase presence (no phase loss), correct phase sequence (phase rotation), voltage level (over‑/under‑voltage), and phase balance (detecting unbalance). It ensures that motors and other three‑phase equipment are protected against supply anomalies which could damage equipment or lead to malfunction.