Technical Specifications / Parameters Parameter Specification Manufacturer Order Code 1SVR040008R1300 Product Family / Series ABB CR-M / CM-MSN.x Series (Current Monitoring Relays) Device Type Universal Current Monitoring Relay Monitoring Functions • Overcurrent (I>) • Undercurrent (I<) • Phase Failure Detection (when used in 3-phase mode with multiple relays or a specific variant) Current Input • Direct Input: Typically up to 5A AC via internal measurement circuit. • External CT Input: For higher currents, connects to standard 1A or 5A secondary current transformers. Setting Range (via DIP) Adjustable over a wide range (e.g., from 10% to 200% of the CT secondary current), selectable via DIP switches. Power Supply (Us) Wide-range 24...240V AC/DC (auto-sensing). Output Relay 1 Changeover (CO) Contact (SPDT: 1 NO + 1 NC) • Contact Rating: Typically 6A / 250V AC (resistive load). Setpoint Adjustment Via rotary DIP switches on the front/side for selecting current range and trip threshold (as a percentage of the set nominal current). Time Delays Adjustable start-up delay (to ignore inrush currents) and trip delay (for stable operation). Status Indication LEDs for Power (ON), Alarm/Trip, and sometimes Load Current Present. Mounting DIN Rail Mounting (35mm). Module Width 22.5mm (1 module width) or 17.5mm (for ultra-compact variants). Operating Temperature -25°C ... +55°C. Standards & Approvals IEC/EN 60255, UL 508, CSA C22.2 No. 14, CE, cULus listed. Connection Screw-clamp terminals. Typical Applications • Motor protection against overload, underload (e.g., pump dry-run), and phase loss. • Heating element monitoring for broken filaments. • Fan and blower supervision (detecting belt slippage or blockage via undercurrent). • Pump sequencing and duty control. • General machine monitoring for tool breakage or jamming.