ABB Relion 670 Series Applications Manual page 12

Table of contents
9.3.3.5
9.3.3.6
9.4 Voltage differential protection VDCPTOV .......................................................................... 223
9.4.1 Identification...........................................................................................................................223
9.4.2 Application...............................................................................................................................223
9.4.3 Setting guidelines.................................................................................................................. 224
9.5 Loss of voltage check LOVPTUV ...........................................................................................225
9.5.1 Identification...........................................................................................................................225
9.5.2 Application...............................................................................................................................225
9.5.3 Setting guidelines.................................................................................................................. 226
9.5.3.1
Section 10 Unbalance protection................................................................................ 227
10.1 Shunt capacitor cascading failure protection SCCFPVOC .............................................. 227
10.1.1 Identification...........................................................................................................................227
10.1.2 Application...............................................................................................................................227
10.1.3 Setting guidelines.................................................................................................................. 230
10.1.4 Setting example..................................................................................................................... 230
10.2 Current unbalance protection of SCB, SCUCPTOC............................................................ 231
10.2.1 Identification........................................................................................................................... 231
10.2.2 Application............................................................................................................................... 231
10.2.3 Setting guidelines.................................................................................................................. 235
10.2.4 Setting examples................................................................................................................... 236
10.3 Phase voltage differential based capacitor bank unbalanced protection,
SCPDPTOV................................................................................................................................. 248
10.3.1 Identification.......................................................................................................................... 248
10.3.2 Application.............................................................................................................................. 248
10.3.3 Setting guidelines.................................................................................................................. 251
10.3.4 Setting examples....................................................................................................................253
10.4 Voltage unbalance protection of shunt capacitor bank, SCUVPTOV............................ 263
10.4.1 Identification...........................................................................................................................263
10.4.2 Application.............................................................................................................................. 263
10.4.3 Setting guidelines..................................................................................................................264
10.4.4 Setting examples................................................................................................................... 266
10.4.4.1
10.4.4.2
Section 11 Frequency protection................................................................................ 275
11.1 Underfrequency protection SAPTUF ................................................................................... 275
11.1.1 Identification...........................................................................................................................275
11.1.2 Application...............................................................................................................................275
11.1.3 Setting guidelines.................................................................................................................. 275
11.2 Overfrequency protection SAPTOF ......................................................................................276
11.2.1 Identification...........................................................................................................................276
11.2.2 Application...............................................................................................................................276
11.2.3 Setting guidelines.................................................................................................................. 276
11.3 Rate-of-change of frequency protection SAPFRC .............................................................277
6
Direct earthed system......................................................................................................221
Settings for two step residual overvoltage protection.............................................221
Advanced users settings................................................................................................. 226
Example of an externally fused ungrounded double WYE configuration..............267
Example of an internally fused ungrounded single WYE configuration................ 270
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1MRK 511 401-UEN Rev. K
Bay control REC670
Application manual