Technical Parameters Parameter Category Specification Product Family / Type Self-Powered 3-Phase Voltage Monitor with Motor Start Feature Monitoring Functions 1. Phase Sequence (Rotation) Control 2. Phase Loss / Undervoltage Detection 3. Voltage Asymmetry (Unbalance) Monitoring 4. Voltage Dip Ride-Through during Motor Start Standard Compliance IEC/EN 60947-5-1 Power Supply Self-powered from the monitored 3-phase line voltage (L1, L2, L3). Rated Operational Voltage (Ue) 3 x 208...480 V AC, 50/60 Hz (Phase-to-Phase). Current Input (for Start Logic) 1 A AC nominal (via external Current Transformers - CTs). Parameter Settings & Ranges • Running Voltage Threshold (U<) Adjustable via potentiometer. Sets the minimum permissible voltage during normal operation. • Start Voltage Threshold Fixed internally or linked to Running Threshold. A less sensitive level active only during motor start. • Voltage Asymmetry (ΔU) Adjustable via potentiometer. Sets the maximum allowed voltage difference between phases. • Start Time Fixed internal timer defining the duration of the start monitoring mode (typically a few seconds). Output Contact • Type 1 Changeover (CO) contact (SPDT). • Rated Operational Current (Ie) 6 A at 250 V AC (AC-15 category). Binary Input • Reset / Start Input 1 input (Terminals A1, A2). Requires a 24-48 V DC pulse (suffix -11) to close the output contact after a fault or initial power-up. Visual Indication 2 LEDs: - GREEN (On): Supply healthy, correct sequence, parameters within limits. - RED (Trip): Fault condition (Loss, Unbalance, or Sequence Error). Electrical Connections Screw-clamp terminals for: - 3 Phase Voltages (L1, L2, L3). - 3 Current Inputs (From 1A secondary CTs, star-connected). - Output Contact (13-14 NO, 21-22 NC). - Reset Input (A1, A2). Isolation Reinforced insulation between all circuits: mains voltage, CT inputs, output contact, reset input. Operating Temperature -25°C to +55°C Storage Temperature -40°C to +85°C Mounting Standard 35mm DIN Rail. Housing & Protection Thermoplastic housing, IP40 (front), IP20 (terminal area). Dimensions (W x H x D) Approx. 45 mm x 100 mm x 112 mm (2 module width). Weight Approx. 0.2 kg. Certifications CE, cULus, RoHS.