Completing the test.............................................................. 201
Voltage differential protection VDCPTOV .................................
201
Check of undervoltage levels............................................... 201
Check of voltage differential trip and alarm levels................203
Check of trip and trip reset timers........................................ 204
Final adjustment of compensation for VT ratio differences . 205
Completing the test.............................................................. 205
Loss of voltage check LOVPTUV ............................................. 205
Measuring the operate limit of set values.............................205
Completing the test.............................................................. 206
Radial feeder protection PAPGAPC.......................................... 206
Verifying the settings............................................................ 206
Completing the test.............................................................. 208
Frequency protection......................................................................208
Underfrequency protection SAPTUF ........................................ 208
Verifying the settings............................................................ 208
Completing the test.............................................................. 209
Overfrequency protection SAPTOF ..........................................209
Verifying the settings............................................................ 209
Completing the test.............................................................. 210
Rate-of-change frequency protection SAPFRC ........................210
Verifying the settings............................................................ 210
Completing the test.............................................................. 211
Multipurpose protection.................................................................. 211
General current and voltage protection CVGAPC..................... 211
Built-in overcurrent feature (non-directional)........................ 212
Overcurrent feature with current restraint.............................212
Overcurrent feature with voltage restraint............................ 213
Overcurrent feature with directionality..................................213
Over/Undervoltage feature................................................... 214
Completing the test.............................................................. 214
Secondary system supervision.......................................................214
Current circuit supervision CCSSPVC.......................................214
Verifying the settings............................................................ 214
Completing the test.............................................................. 215
Fuse failure supervision FUFSPVC...........................................215
Checking that the binary inputs and outputs operate as
expected ..............................................................................215
Measuring the operate value for the negative sequence
function ................................................................................216
Measuring the operate value for the zero-sequence
function ................................................................................217
Measuring the operate value for the dead line detection
function.................................................................................218
Table of contents
Line differential protection RED670 2.2 IEC 7
Commissioning manual