AMC Series programmable intelligent three phase current, voltage meter, adopting AC sampling technology, can directly measure current and voltage of three phase grid. It can be used for local display, and connecting industrial control device to form measuring control system . Meters have RS-485 communication interface, adopt compatible Modbus-RTU protocol; can change electric parameter signal into standard analog output; or with l channel relay alarm output; or with 4 channel(2 channel) switching input/2 channel switching output Based on different request, by pressing related keys on instrument panel, parameter setting and control of transformation ratio, alarm, communication etc. can be done.