... integers, 1 decimal)7). Power supply cuts down and the meter gives an alarm when energy is used up, overdraft is ... acts of tampering. 2. Specifications and main technical parameters1) The meter complies with IEC1036, GB/T18460-20012) Rated voltage: 220V (critical ... ,5(20)A,10(40)A,15(60)A4) Rated frequency: 50/60HZ5) Impulse constant: 6400,3200,1600,800 imp/kW ...