... energy, Do not need calibrate for long-term operation 2. Adopt dedication meterage chip ADE7755 3. Adopting latest electricity ... life Specification and Technical Data 1. Rated Current(A)2.5(10),5(20),5(30)10(40),15 ... (Hz)50,60 4Accuracy class class 1.o, class 2.0 5. Applied StandardsIEC62053; 6. Voltage Range 0. ... 50 Hz, 1 min 12. Impulse Voltage6 kV, 1.2 / 50 μs 13. Short-circuit Current30 I max14. Burst ...