A.C. Voltage Relay with adjustable differential   Application :   The Rishabh A.C. Voltage Protectors provide continuous surveillance of the monitored circuit. When the measured voltage moves outside the set point limit, the relay will operate giving an alarm and or initiation signal. An illuminated LED indicates when the relay is energised. The 3 phase, 3 or 4 wire models protect each phase independently.   The Protector can be used to protect for:   • Under voltage   • Over current   • Start up standby generators   • Operation of mains failure units   • Switching standby hybrid supplies   • Protecting computer supplies   • Close control of equipment       Features :   • Adjustable set point   • Adjustable differential   • Preset time delay   • LED trip indication   • 2 pole relay contacts         Specifications :   Input : Nominal current 100, 110, 220, 230, 240, 380, 400, 415 or 440V (57 to 480V) System Frequency 45/65Hz or 360/440Hz Overload 1.2 x continuously 1.5 x for 10 x 10 seconds To BS 6253 Set Point : Repeatability Better than 0.5% Differential Adjustable range 1-15% Adjustable Range Under Voltage 75 to 100% Over Voltage 100 to 125% of nominal input voltage Time Delay Preset (specify) Maximum 30 seconds. For user adjustable models see page 4 Burden 3VA Weight 252 case - approx 0.4Kg 253 case - approx 0.6Kg Output Relay : Type D.P. Changeover Rating A.C 240V,5A non-inductive   D.C View chart Operations 0.2 million at the above loads Reset Automatic             - Protector Trip Relays   - A.C. Current Relay   - A.C. Voltage Relay with adjustable differential   - A.C. Voltage Relay with adjustable time delay   - Frequency Relay   - Combined Under / Over Voltage & Under / Over Frequency Relay   - Phase Sequence & Phase Failure Relay   - Phase Balance Relay   - Reverse Power (Current) Relay   - Synchro-Check Relay(Paralleling)   - D.C. Voltage Relay   - Thermistor Trip Relay   - Hot Spot 3 Relay   - Hot Spot 6 Relay   - Millivolt / Thermocouple Relay   - Transducer Trip   - Speed Sensing Trip Relay