Rishabh Instruments Pvt. Ltd. Protection Relays & Systems RISH RELAY - PHR

The RISH Relay - PHR is a three-phase protection relay for motor and conveyor system applications, providing phase failure, phase unbalance, and incorrect sequence protection. It is self-powered, requiring no external supply, and uses VLL for 3-phase 3-wire systems or VLN for 3-phase 4-wire systems. The relay features True RMS measurement up to the 15th harmonic, LED indicators for fault conditions, and a single changeover contact rated at 5A/250VAC or 30VDC. It operates on nominal input voltages of 110, 240, 415, or 440 VLL, with a frequency range of 50/60 Hz. The device meets IEC 61010-1-2010 safety standards and has an IP20 enclosure rating. Operating temperature ranges from -10°C to +55°C, with storage from -25°C to +70°C. It weighs approximately 120 grams and mounts via terminal connections. Default settings include a 70% voltage threshold for phase failure and a 20% threshold for unbalance with a 3.5-second delay.