April 2010 IEC/TR 61000 3 13 (First edition – 2008) Electromagnetic compatibility (EMC) – Part 3 13 Limits – Assessment of emission limits for the connection of unbalanced installations to MV, HV and[.]
Trang 1April 2010
IEC/TR 61000-3-13 (First edition – 2008) Electromagnetic compatibility (EMC) – Part 3-13: Limits – Assessment of emission limits for the connection of
unbalanced installations to MV, HV and EHV power systems
C O R R I G E N D U M 1
Figure A.2
Replace the existing Figure A.2 by the following:
Unbalance reduction factor (TuUM):
HV and MV measurement
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
Days
HV NPS Unbalance (%)
MV NPS Unbalance (%) Power (p.u on 20MVA base) Reduction Factor
Reduction in motor loading
Unbalance reduction factor (TuUM):
HV and MV measurement
0
0,2
0,4
0,6
0,8
1,0
1,2
1,4
1,6
1,8
Days
HV NPS Unbalance (%)
MV NPS Unbalance (%) Power (p.u on 20 MVA base) Reduction Factor
Reduction in motor loading
IEC 699/10
Figure A.2 – Example of unbalance ratio measurement for a remote mine with largely motor loading