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
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
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
Transformer protection RET670 2.2 ANSI
15
Application manual
Summary of Contents for RELION RET670
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