Hitachi Relion 670 Series Commissioning Manual page 11

1MRK 511 403-UEN Rev. L
11.4.16.2
11.4.17 Voltage-restrained time overcurrent protection VRPVOC............................................... 113
11.4.17.1
11.4.17.2
11.4.17.3
11.4.18 Average Power Transient Earth Fault Protection, APPTEF............................................ 117
11.4.18.1
11.4.18.2
11.5 Voltage protection..............................................................................................................120
11.5.1 Two step undervoltage protection UV2PTUV .................................................................120
11.5.1.1
11.5.1.2
11.5.2 Two step overvoltage protection OV2PTOV ...................................................................121
11.5.2.1
11.5.2.2
11.5.2.3
11.5.3 Two step residual overvoltage protection ROV2PTOV .................................................. 122
11.5.3.1
11.5.3.2
11.5.3.3
11.5.4 Voltage differential protection VDCPTOV .......................................................................123
11.5.4.1
11.5.4.2
11.5.4.3
11.5.4.4
11.5.4.5
11.5.4.6
11.5.5 Loss of voltage check LOVPTUV ................................................................................... 128
11.5.5.1
11.5.5.2
11.6 Unbalance protection........................................................................................................ 129
11.6.1 Shunt capacitor cascading failure protection SCCFPVOC .............................................129
11.6.1.1
11.6.1.2
11.6.1.3
11.6.2 Current unbalance protection of SCB, SCUCPTOC....................................................... 131
11.6.2.1
11.6.2.2
11.6.3 Phase voltage differential based capacitor bank unbalanced protection, SCPDPTOV...135
11.6.3.1
11.6.3.2
11.6.4 Voltage unbalance protection of shunt capacitor bank, SCUVPTOV.............................. 141
11.6.4.1
11.6.4.2
11.7 Frequency protection.........................................................................................................143
11.7.1 Underfrequency protection SAPTUF ..............................................................................143
Bay control REC670
Commissioning manual
Completing the test.................................................................................................... 113
Function revision history.............................................................................................113
Verifying the settings.................................................................................................. 114
Completing the test.................................................................................................... 116
Verifying the signals and settings............................................................................... 117
Completing the test.................................................................................................... 120
Verifying the settings.................................................................................................. 120
Completing the test.................................................................................................... 121
Verifying the settings.................................................................................................. 121
Extended testing........................................................................................................ 122
Completing the test.................................................................................................... 122
Function revision history............................................................................................ 122
Verifying the settings.................................................................................................. 123
Completing the test.................................................................................................... 123
Function revision history............................................................................................ 124
Check of undervoltage levels..................................................................................... 124
Check of voltage differential trip and alarm levels......................................................126
Check of trip and trip reset timers.............................................................................. 127
Final adjustment of compensation for VT ratio differences ....................................... 128
Completing the test.................................................................................................... 128
Measuring the operate limit of set values...................................................................128
Completing the test.................................................................................................... 129
Function revision history............................................................................................ 129
Verifying the signals and settings...............................................................................129
Completing the test.................................................................................................... 131
Verifying the signals and settings...............................................................................131
Completing the test.................................................................................................... 135
Verifying the signals and settings...............................................................................135
Completing the test.................................................................................................... 141
Verifying the signals and settings...............................................................................141
Completing the test.................................................................................................... 143
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