April2010IEC/TR61000-3-13(Firstedition–2008)Electromagneticcompatibility(EMC)–Part3-13:Limits–AssessmentofemissionlimitsfortheconnectionofunbalancedinstallationstoMV,HVandEHVpowersystemsCORRIGENDUM1FigureA.2ReplacetheexistingFigureA.2bythefollowing:Unbalancereductionfactor(TuUM):HVandMVmeasurement00.20.40.60.811.21.41.61.8012345678DaysHVNPSUnbalance(%)MVNPSUnbalance(%)Power(p.u.on20MVAbase)ReductionFactorReductioninmotorloadingUnbalancereductionfactor(TuUM):HVandMVmeasurement00,20,40,60,81,01,21,41,61,8012345678DaysHVNPSUnbalance(%)MVNPSUnbalance(%)Power(p.u.on20MVAbase)ReductionFactorReductioninmotorloadingIEC699/10FigureA.2–ExampleofunbalanceratiomeasurementforaremoteminewithlargelymotorloadingLICENSEDTOMECONLIMITED-RANCHI/BANGALORE,FORINTERNALUSEATTHISLOCATIONONLY,SUPPLIEDBYBOOKSUPPLYBUREAU.
