ABB rec670 - Page 10

Application....................................................................................... 165
Setting guidelines
............................................................................ 165
Directional residual overcurrent protection, four steps EF4PTOC
(51N/67N)
............................................................................................. 168
Identification.................................................................................... 168
Application....................................................................................... 169
Setting guidelines............................................................................ 171
Common settings for all steps.................................................... 171
2nd harmonic restrain.................................................................173
Parallel transformer inrush current logic.....................................173
Switch onto fault logic.................................................................174
Settings for each step (x = 1, 2, 3 and 4)................................... 175
Line application example............................................................ 178
Four step directional negative phase sequence overcurrent
protection NS4PTOC (46I2)..................................................................183
Identification.................................................................................... 184
Application....................................................................................... 184
Setting guidelines............................................................................ 186
Settings for each step ................................................................186
Common settings for all steps.................................................... 189
Sensitive directional residual overcurrent and power protection
SDEPSDE (67N)...................................................................................190
Identification.................................................................................... 191
Application....................................................................................... 191
Setting guidelines............................................................................ 193
Thermal overload protection, one time constant Fahrenheit/
Celsius LFPTTR/LCPTTR (26)............................................................. 202
Identification.................................................................................... 202
Thermal overload protection, two time constants TRPTTR (49)...........202
Identification.................................................................................... 202
Application....................................................................................... 202
Setting guideline.............................................................................. 203
Breaker failure protection CCRBRF(50BF)...........................................206
Identification.................................................................................... 206
Application....................................................................................... 206
Setting guidelines............................................................................ 207
Stub protection STBPTOC (50STB)..................................................... 210
Identification.................................................................................... 210
Application....................................................................................... 210
Setting guidelines............................................................................ 211
Table of contents
4 Bay control REC670 2.2 ANSI
Application manual