... Phase Watt-Hour Meter1Meter typeDD8622Applicable StandardsIEC60521. IEC5143AccuracyClass 2 (according to IEC60521)4Average service life (MTTF)10years5Basic current (lb) ... ,230V,240V9Reference frequency fn50Hz,60Hz10Power losses in voltage circuit at Un50Hz: 1.2W/6VA, 60Hz: 1.0W/5VA11Power ... 5%lb14Mean temperature coefficient: Form0.1lb to lmax at unity PF Form 0.2lb to lmax at unity 0.5lagging<0.08%/ < ...