ABB RELION RET670 Applications Manual page 21

Transformer protection RET670 2.2 ANSI
Application manual
Setting guidelines............................................................................ 639
Rate-of-change of frequency protection SAPFRC (81)........................ 640
Identification.................................................................................... 640
Application....................................................................................... 640
Setting guidelines............................................................................ 641
Section 12 Multipurpose protection..................................................... 643
General current and voltage protection CVGAPC................................ 643
Identification.................................................................................... 643
Application....................................................................................... 643
Current and voltage selection for CVGAPC function..................644
Base quantities for CVGAPC function........................................ 647
Application possibilities...............................................................647
Inadvertent generator energization.............................................648
Setting guidelines............................................................................ 649
Directional negative sequence overcurrent protection............... 649
Negative sequence overcurrent protection.................................651
Generator stator overload protection in accordance with IEC
or ANSI standards...................................................................... 654
Open phase protection for transformer, lines or generators
and circuit breaker head flashover protection for generators..... 656
Voltage restrained overcurrent protection for generator and
step-up transformer.................................................................... 657
Loss of excitation protection for a generator.............................. 657
Section 13 System protection and control...........................................661
Multipurpose filter SMAIHPAC..............................................................661
Identification.................................................................................... 661
Application....................................................................................... 661
Setting guidelines............................................................................ 663
Setting example..........................................................................663
Section 14 Secondary system supervision..........................................667
Current circuit supervision (87).............................................................667
Identification.................................................................................... 667
Application....................................................................................... 667
Setting guidelines............................................................................ 668
Fuse failure supervision FUFSPVC...................................................... 668
Identification.................................................................................... 668
Application....................................................................................... 668
Setting guidelines............................................................................ 669
Table of contents
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