Hitachi Relion 670 Series Commissioning Manual page 13

1MRK506371-UUS Rev. M
11.6 Voltage protection....................................................................................................................180
11.6.1 Two step undervoltage protection UV2PTUV (27)................................................................ 180
11.6.1.1
11.6.1.2
11.6.2 Two step overvoltage protection OV2PTOV (59).................................................................. 181
11.6.2.1
11.6.2.2
11.6.2.3
11.6.3 Two step residual overvoltage protection ROV2PTOV (59N)............................................... 182
11.6.3.1
11.6.3.2
11.6.3.3
11.6.4 Overexcitation protection OEXPVPH (24).............................................................................183
11.6.4.1
11.6.4.2
11.6.5 Voltage differential protection VDCPTDV (87V).................................................................... 184
11.6.5.1
11.6.5.2
11.6.5.3
11.6.5.4
11.6.5.5
11.6.5.6
11.6.6 Loss of voltage check LOVPTUV (27)...................................................................................188
11.6.6.1
11.6.6.2
11.6.7 Radial feeder protection PAPGAPC (27)...............................................................................189
11.6.7.1
11.6.7.2
11.7 Frequency protection...............................................................................................................190
11.7.1 Underfrequency protection SAPTUF (81)............................................................................. 190
11.7.1.1
11.7.1.2
11.7.2 Overfrequency protection SAPTOF (81)............................................................................... 191
11.7.2.1
11.7.2.2
11.7.3 Rate-of-change frequency protection SAPFRC (81)............................................................. 192
11.7.3.1
11.7.3.2
11.8 Multipurpose protection........................................................................................................... 193
11.8.1 Function revision history........................................................................................................193
11.8.2 General current and voltage protection CVGAPC.................................................................193
11.8.2.1
11.8.2.2
Line distance protection REL670
Commissioning manual
Verifying the settings........................................................................................................ 180
Completing the test.......................................................................................................... 181
Verifying the settings........................................................................................................ 181
Extended testing...............................................................................................................182
Completing the test.......................................................................................................... 182
Function revision history...................................................................................................182
Verifying the settings........................................................................................................ 182
Completing the test.......................................................................................................... 183
Verifying the settings........................................................................................................ 183
Completing the test.......................................................................................................... 184
Function revision history...................................................................................................184
Check of undervoltage levels........................................................................................... 185
Check of voltage differential trip and alarm levels............................................................186
Check of trip and trip reset timers.................................................................................... 187
Final adjustment of compensation for VT ratio differences ............................................. 188
Completing the test.......................................................................................................... 188
Measuring the trip limit of set values................................................................................ 188
Completing the test.......................................................................................................... 189
Verifying the settings........................................................................................................ 189
Completing the test.......................................................................................................... 190
Verifying the settings........................................................................................................ 190
Completing the test.......................................................................................................... 191
Verifying the settings........................................................................................................ 191
Completing the test.......................................................................................................... 192
Verifying the settings........................................................................................................ 192
Completing the test.......................................................................................................... 192
Built-in overcurrent feature (non-directional).................................................................... 193
Overcurrent feature with current restraint.........................................................................194
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