Novatek ubz 302 universal 3 phase motor protection relay novatek ubz 302 p the novatek ubz 302 is a microprocessor based digital device that provides protection for 3 phase motors no external power supply is required as the unit uses the same power supply as the motor it has been designed to work in 3 phase electric circuits with or without an isolated neutral connection allowing operation in both in 3 and 4 wire circuits p p the ubz 302 has 3 built in current measurement transformers