DIN Rail Electronic Watt-hour Meter 1.CE,CB,ISO9001, ... volume, light weight, etc. General DDS238-4 single phase din rail watt-hour meter is a kind of new style according ... convenient installation, etc. Function and Features35mm standard DIN rail installation complies with standard DIN EN5002.Register display: 99999.9 kwh; LCD ... 5(30), 5(40),10(50),15(60),20(100),0.4%IbAC volation 2kV 50V 1 min impulse ...