Programmable ammeter and voltmeter has hunction of preset transformation ratio by pqnel keys other than measuring and display as usual (the transformation ratio of meter should match with that of mutual inductor). the meter has transmitted 4-20mA analogue output,RS-485 digital interface and standard MODBUS protocol.

Programmbale 3-phase power meter has function of switching input current/voltage transform ation ratio to display power with different range by panel key other than measuring and display power as usual (the transformation ratio of meter should match with that of mutual inductor).

The meter has transmitted 4-20mA analogue output and RS-485 digital interface.