Rishabh Instruments Pvt. Ltd. Protection Relays & Systems VR-3-M-1

Voltage protection relay for three-phase systems with a nominal input voltage range of 381-415 VLL, featuring under voltage, over voltage, phase unbalance, phase failure, phase sequence, and neutral failure protection. Compact size of 17.5 mm with IP20 enclosure, self-powered, and includes one changeover relay contact rated at 5 A/250 VAC. Adjustable trip points for over and under voltage (105-125% and 75-95% of nominal), fixed trip thresholds for phase unbalance (20%), phase failure (70%), and hysteresis (3% of nominal). Trip delays adjustable from 0 to 10 seconds for voltage faults, with instant tripping for phase reversal and neutral failure. Operates on 50/60 Hz, with accuracy within ±3% of nominal value, and meets IEC 61010-1-2010 safety standards and IEC 60529 for ingress protection. Operating temperature range from -10 to +55°C. Relay contacts are in normally energized configuration.