Micro processor based (numeric) under / over – voltage relay MICRO PROCESSOR BASED OVER/UNDER VOLTAGE RELAY (VPL-05) One no. of PIC-Micro Processor used as processor to read fault-voltage, & relay function. One no. of LCD to indicate Voltage & Time Constants. Five no’s of key used for set point adjustments. OV/UV selection. One no. of 230/9V PT used to sense fault voltage. One no. of 12v auxiliary relay used for contactor operation. One no .of LED provided to indicate the relay tripping condition SPECIFICATION: Voltage Input: 0 – 23 0volt Number of contact: One number “NC” contact @ 220V, 5Amp rating, one of “NO” contact @ 220V, 5amp rating. Auxiliary Supply: 230V AC, 50Hz Power ON/OFF switch with indicator. VOLTAGE INJUCTION SOURCE One no. of auto transformer used for voltage adjustment. Voltage output terminated in the banana-sockets Specification: Voltage range: 0-230V AC. (Continuously variables) EXPERIMENTS: Study & Test DMT/IDMT type Over/Under-voltage relay with different voltage & time settings Study & Test of DMT/IDMT type Over/Under voltage relay with different voltage & time settings Optional: PC Interface with the above Relay