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1 Introduction
PCS-978 Transformer Relay
1-9
Date: 2012-10-08
oscillography triggering modes are supported, which are protection pickup triggering,
manual triggering, and remote triggering through PCS-Explorer software.
User HMI Interface
The HMI interface with an LCD and a 9-button keypad on the front panel is very friendly to
the user.
Communication Ports
One front RS-232 port
RS-485 ports and Ethernet ports communication with SCADA or RTU
One rear RS-485 with clock synchronization.
One rear RS-232 or RS-485 with printer.
GOOSE communication function (optional module)
Clock Synchronizations
Various GPS clock synchronizations: second/minute pulse via binary input or RS-485,
message via communication ports and IRIG-B synchronization.
1.3.2 Transformer Current Differential Protection
Maximum six group CT inputs for differential protection.
Protection for 2-winding, 3-winding transformer and auto-transformer.
24 vector groups available for two-winding transformer.
288 vector groups available for 3-winding transformer.
Optional inrush current distinguished principles: harmonic criterion (second harmonic and
third harmonic) or waveform distortion.
There are two optional modes for harmonic criterion: self-adaptive blocking mode and
phase-to-phase cross blocking mode. Self-adaptive blocking mode can enhance ability of
differential protection to avoid maloperation during transformer energization effectively and
ensure high speed of differential protection for faults under normal operation.
Fifth harmonic or third harmonic criterion applied continuously to detect overexciation
condition.
Three slopes biased differential protection are configurable by users.
Unrestrained instantaneous differential protection is equipped.
Distinct method of phase shifting
During transformer energization,
△
→Y transfer method is used to adjust phase angle of
secondary current on each side of the transformer, and thus the faulty and healthy phase
can possess its characteristic. Therefore, restraint current and differential current can be
Содержание PCS-978
Страница 1: ...PCS 978 Transformer Relay Instruction Manual NR Electric Co Ltd ...
Страница 2: ......
Страница 6: ...Preface PCS 978 Transformer Relay IV Date 2013 01 16 ...
Страница 10: ...Preface PCS 978 Transformer Relay VIII Date 2013 01 16 ...
Страница 62: ...3 Operation Theory PCS 978 Transformer Relay 3 p Date 2013 01 16 ...
Страница 250: ...4 Supervision PCS 978 Transformer Relay 4 b Date 2013 01 16 ...
Страница 264: ...4 Supervision PCS 978 Transformer Relay 4 14 Date 2013 01 16 ...
Страница 266: ...5 Management PCS 978 Transformer Relay 5 b Date 2013 01 16 ...
Страница 272: ...5 Management PCS 978 Transformer Relay 5 6 Date 2013 01 16 ...
Страница 334: ...6 Hardware Description PCS 978 Transformer Relay 6 60 Date 2013 01 16 ...
Страница 370: ...8 Human Machine Interface PCS 978 Transformer Relay 8 d Date 2013 01 16 ...
Страница 404: ...8 Human Machine Interface PCS 978 Transformer Relay 8 34 Date 2013 01 16 ...
Страница 406: ...9 Configurable Function PCS 978 Transformer Relay 9 b Date 2013 01 16 ...
Страница 446: ...10 Communication PCS 978 Transformer Relay 10 26 Date 2013 01 16 ...
Страница 448: ...11 Installation PCS 978 Transformer Relay 11 b Date 2012 10 09 ...
Страница 456: ...11 Installation PCS 978 Transformer Relay 11 8 Date 2012 10 09 ...
Страница 458: ...12 Commissioning PCS 978 Transformer Relay 12 b Date 2012 12 07 ...
Страница 468: ...12 Commissioning PCS 978 Transformer Relay 12 10 Date 2012 12 07 ...
Страница 470: ...13 Maintenance PCS 978 Transformer Relay 13 b Date 2012 10 09 ...
Страница 474: ...13 Maintenance PCS 978 Transformer Relay 13 4 Date 2012 10 09 ...
Страница 476: ...14 Decommissioning and Disposal PCS 978 Transformer Relay 14 b Date 2012 10 09 ...
Страница 478: ...14 Decommissioning and Disposal PCS 978 Transformer Relay 14 2 Date 2012 10 09 ...
Страница 480: ...15 Manual Version History PCS 978 Transformer Relay 15 2 Date 2013 01 16 ...