Technical Specifications / Parameters Parameter Specification Manufacturer Order Code 1SVR550127R1100 Product Family / Series ABB CM-SPS.x Series (Single-Phase Voltage Monitoring Relays) Device Type Single-Phase Voltage Monitoring Relay Monitoring Functions • Undervoltage (U<) overvoltage="" u="">) • Voltage Asymmetry / Phase Loss (Detection of supply failure in a single-phase context) Rated Supply Voltage (Us) 24...240V AC/DC (Wide-range, auto-sensing). This is both the monitored voltage and the relay's own operating power. Monitoring Voltage Range Corresponds to the supply voltage range (Us). Setpoint Adjustment Via rotary DIP switches on the side/front for setting voltage thresholds (e.g., 85% for undervoltage, 110% for overvoltage) and time delays. Output Relay 1 Changeover (CO) Contact (SPDT) • Contact Rating: Typically 6A / 250V AC (resistive load). Output Logic Configurable (e.g., output energized under normal conditions and de-energized upon fault, or vice-versa). Time Delays Adjustable start-up delay (to ignore brief disturbances during power-up) and trip delay (to prevent nuisance tripping on short dips/surges). Status Indication LEDs for Power (ON), Output Status, and sometimes Fault indication. Mounting DIN Rail Mounting (35mm, EN 60715) Module Width 12.5mm (Extremely compact, less than 1 standard module). Operating Temperature -25°C ... +55°C Standards & Approvals IEC/EN 60255, UL 508, CSA C22.2 No. 14, CE, cULus listed. Connection Slotted screw terminals. Typical Applications • Mains voltage monitoring for control panels, PLCs, and sensitive electronics. • Undervoltage protection for motors and compressors. • Sequential start-up of equipment after a power restoration (using the start-up delay). • Pump protection against dry-running caused by low voltage. • Monitoring of uninterruptible power supply (UPS) output or generator voltage.