3 Operation Theory
PCS-978 Transformer Relay
3-73
Date: 2013-01-16
No.
Signal
Description
3 87W.St
Winding differential protection of x side starts.
Start signals of protection element.
4 87W.Alm_Diff
CT secondary circuit for winding differential protection of x side is abnormal.
5 87W.Alm_CTS
CT secondary circuit for Winding differential protection of x sided fails.
Alarm reports of equipment operation.
6 87W.TrigDFR
Winding differential protection of x side picks up to trigger DFR function.
Signals of protection element triggering DFR function recorded as IO events.
Table 3.5-4 Output signals of 87W: measurements
No.
Signal
Description
Unit
1
87W.Ida
87W.Idb
87W.Idc
Three phase differential current of winding differential protection.
In
2 87W.I0d
Residual differential current of winding differential protection.
In
3
87W.Ithra
87W.Ithrb
87W.Ithrc
Thereshold of three phase restraint current of winding differential
protection
In
4 87W.Ithr0
Thereshold of residual restraint current of residual differential protection.
In
5
87W.Ia_Corr_Br
m
87W.Ib_Corr_Br
m
87W.Ic_Corr_Br
m
Corrected values of three phase current of winding differential protection
of branch
m
(n=1, 2, 3, 4, 5).
In
6 87W.I0_Corr_Br
m
Corrected value of residual differential current of winding differential
protection.
In
7
87W.Ang(Ia)_Br1-Br
m
87W.Ang(Ib)_Br1-Br
m
87W.Ang(Ic)_Br1-Br
m
Three phase angles between the current of branch 1 and the current of
branch
m
(
m
=2, 3, 4, 5).
deg
8 87W.Ang(3I0)_Br1-Br
m
Angle between residual current of branch 1 and residual current of branch
m
(
m
=2, 3, 4, 5).
deg
9 87W.K_Br
m
Corrected coefficient of branch
m
(
m
=1, 2, 3, 4, 5) for winding differential
protection.
Path:
Main menu
->
Measurements
->
Measurements1
->
WDIF Measurements
Main menu
->
Measurements
->
Measurements2
->
WDIF Measurements
3.5.6 Settings
Table 3.5-5 Setting list of 87W
No.
Setting Item
Range
Step
Unit
Description
Summary of Contents for PCS-978
Page 1: ...PCS 978 Transformer Relay Instruction Manual NR Electric Co Ltd ...
Page 2: ......
Page 6: ...Preface PCS 978 Transformer Relay IV Date 2013 01 16 ...
Page 10: ...Preface PCS 978 Transformer Relay VIII Date 2013 01 16 ...
Page 62: ...3 Operation Theory PCS 978 Transformer Relay 3 p Date 2013 01 16 ...
Page 250: ...4 Supervision PCS 978 Transformer Relay 4 b Date 2013 01 16 ...
Page 264: ...4 Supervision PCS 978 Transformer Relay 4 14 Date 2013 01 16 ...
Page 266: ...5 Management PCS 978 Transformer Relay 5 b Date 2013 01 16 ...
Page 272: ...5 Management PCS 978 Transformer Relay 5 6 Date 2013 01 16 ...
Page 334: ...6 Hardware Description PCS 978 Transformer Relay 6 60 Date 2013 01 16 ...
Page 370: ...8 Human Machine Interface PCS 978 Transformer Relay 8 d Date 2013 01 16 ...
Page 404: ...8 Human Machine Interface PCS 978 Transformer Relay 8 34 Date 2013 01 16 ...
Page 406: ...9 Configurable Function PCS 978 Transformer Relay 9 b Date 2013 01 16 ...
Page 446: ...10 Communication PCS 978 Transformer Relay 10 26 Date 2013 01 16 ...
Page 448: ...11 Installation PCS 978 Transformer Relay 11 b Date 2012 10 09 ...
Page 456: ...11 Installation PCS 978 Transformer Relay 11 8 Date 2012 10 09 ...
Page 458: ...12 Commissioning PCS 978 Transformer Relay 12 b Date 2012 12 07 ...
Page 468: ...12 Commissioning PCS 978 Transformer Relay 12 10 Date 2012 12 07 ...
Page 470: ...13 Maintenance PCS 978 Transformer Relay 13 b Date 2012 10 09 ...
Page 474: ...13 Maintenance PCS 978 Transformer Relay 13 4 Date 2012 10 09 ...
Page 476: ...14 Decommissioning and Disposal PCS 978 Transformer Relay 14 b Date 2012 10 09 ...
Page 478: ...14 Decommissioning and Disposal PCS 978 Transformer Relay 14 2 Date 2012 10 09 ...
Page 480: ...15 Manual Version History PCS 978 Transformer Relay 15 2 Date 2013 01 16 ...