... IEC60521-1988 and BS EN 60521 standards. DD862 single phase watt meter(wattmeter,kwh meter) Meter case Two types of cases are available One is ... , Bakelite21Meter coverABS, Aluminum, Glass, Bakelite, transparent PC22Terminal coverABS, Bakelite, PC23RegisterCyclometer single, Unidirectional, Jumping , Metal24OptionReverse running stopper, pulse sampling device DD862 single phase watt meter