The meter is a new-type high-tech measuring instrument, which adopts DSP (Digital Signal Processing)technology, weak signal detection technology and CPLD (Complex Programmable Logic Device) with high reliability and accuracy as well as low error. It can accurately measure in case of phase sequence reverse, bypass current coil, current reverse of current coil, potential loss, neutral line loss and high intensity field influence with recording the said events. The meter has many communication methods including RS485, RS232, low-speed infrared or high-speed infrared communication port and displays by LCD. The meter can calculate and display voltage, current, power, power factor and frequency of each phase in the power network with good anti-tampering function. All the performances of the meter comply with the requirements specified in IEC 1036. The design and manufacture are strictly in accordance with ISO9001-2000 Quality System so that the products are high quality and high performance. Key Features and Parameters: *Accuracy Class: 0.5 and 1.0 (active) 2.0 (reactive) *Rated voltage: 3?7.5V/100V, 3?20V/380V, 3?30V/398V, 3?40V/416V, 3?00V, 3?80V *Rated current: 3?.5(6)A, 3?0(40)A, 3?0(60)A *Rated Frequency: 50Hz, 60Hz *Anti-creeping logic circuit *Starting current: 0.1%Ib for meters of class 0.5 and 0.2%Ib for meters of class 1.0 *Power loss: <2W/5VA (voltage circuit) <1VA (current circuit) *Communication method: RS485, RS232, low-speed infrared and high infrared *Display method: LCD *Complete anti-tampering function by recording event of phase sequence reverse, bypass current coil, current reverse of current coil, potential loss, neutral line loss and the latest twenty abnormal wiring. *Overall dimension: 286mm?70mm?5mm