Technical Parameters Parameter Category Specification Product Family / Type Self-Powered Three-Phase Voltage Monitoring Relay Key Monitoring Functions • Correct Phase Sequence (Phase Rotation) • Phase Loss (Undervoltage per Phase) • Voltage Asymmetry (Unbalance) Standard Compliance IEC/EN 60947-5-1 Power Supply Self-powered from the monitored three-phase voltage system. No external auxiliary supply required. Rated Operational Voltage (Ue) 3 x 208...480 V AC, phase-to-phase. (50/60 Hz). The -70 suffix in this context indicates this wide voltage range. Operating Voltage Range 0.7 to 1.1 x Ue. Rated Current Input (In) 1 A AC (This is defined by the -600- in the type code and is related to an optional current-based function for voltage dip monitoring during motor start). Monitoring Parameters & Settings • Voltage Threshold (U<) Adjustable via rotary switch. Typically sets the minimum voltage level for phase loss detection. • Asymmetry Setting Adjustable via rotary switch. Sets the permissible voltage unbalance level between phases (e.g., as a percentage). • Response Time Fixed delay to prevent nuisance tripping from transient events. • Phase Sequence Fixed for one rotation (e.g., L1-L2-L3). Trips immediately on reversal. Output Contact • Type 1 Changeover (CO) contact (SPDT: 1 NO + 1 NC). • Rated Operational Current (Ie) 6 A at 250 V AC (AC-15). Binary Input 1 Reset/Start Input (Terminals A1/A2). A control voltage (matching the -70 range: 48-250V DC/AC) must be applied to close the output relay after a fault or upon initial power-up. Indications 2 LEDs: - Green (On) : Supply OK, correct sequence, all parameters within limits. - Red (Trip) : Fault condition detected (Phase Loss, Sequence Error, or Asymmetry). Connection Screw-clamp terminals for: - 3 Phase Voltage Inputs (L1, L2, L3, N optional). - Output Contact (13, 14, 23). - Reset Input (A1, A2). - Optional Current Inputs (for PSR30 models with motor start function). Electrical Durability ≥ 100,000 mechanical operations. Isolation Reinforced insulation between voltage circuits, output contact, and reset input. Operating Temperature -25°C to +55°C Storage Temperature -40°C to +85°C Mounting Standard 35mm DIN Rail. Housing Material Self-extinguishing thermoplastic (Polyamide PA 6.6). Protection Rating IP40 (front), IP20 (terminals). Dimensions (W x H x D) Approx. 22.5 mm x 100 mm x 112 mm (1 Module width = 22.5mm). Weight Approx. 0.15 kg. Certifications CE, cULus, RoHS.