Protective Elements
Zero Sequence Removal
Please note: This section applies only if a step up transformer is part of the protected differential zone.
Zero sequence currents must be removed to prevent the phase differential protection from tripping on external
ground faults. For ground faults, the zero sequence current exits only on the transformer winding side whose neutral
is grounded, but not on the ungrounded winding side. The differential current due to different groundings on two
winding sides results in maloperation of phase differential function if it is not compensated (removed) before. The
protective device does not require the zero sequence currents to be removed externally and they will be
automatically removed internally according to the system parameters »
W1 Connection/Grounding« and »W2
Connection/Grounding«.
⃗
I
W1
' ' '
=⃗
I
W1
−⃗
I
0 ,
W1
⃗
I
W2
' ' '
=⃗
I
W2
' '
−⃗
I
0,
W2
' '
622
MCDLV4
DOK-HB-MCDLV4-2E
Содержание HighPROtec MCDLV4
Страница 1: ...Manual Line Differential Protection MCDLV4 Software Version 3 4 a DOK HB MCDLV4 2E Revision A English...
Страница 3: ...Order Code Order Code 3 MCDLV4 DOK HB MCDLV4 2E...
Страница 47: ...Installation and Connection 47 MCDLV4 DOK HB MCDLV4 2E...
Страница 164: ...Input Output and LED Settings 164 MCDLV4 DOK HB MCDLV4 2E...
Страница 433: ...Parameters 433 MCDLV4 DOK HB MCDLV4 2E...
Страница 457: ...Device Parameters 457 MCDLV4 DOK HB MCDLV4 2E...
Страница 473: ...Blockings 473 MCDLV4 DOK HB MCDLV4 2E...
Страница 822: ...Protective Elements Name Description Profibus Scada Cmd 16 Scada Command 822 MCDLV4 DOK HB MCDLV4 2E...
Страница 988: ...Protective Elements 988 MCDLV4 DOK HB MCDLV4 2E P P Q P Q P Q Q Q P S S...
Страница 989: ...Protective Elements 989 MCDLV4 DOK HB MCDLV4 2E Pr Q P Q P Qr...
Страница 1023: ...Protective Elements 1023 MCDLV4 DOK HB MCDLV4 2E...
Страница 1070: ...Supervision 1070 MCDLV4 DOK HB MCDLV4 2E...