ABB Relion 670 Series Applications Manual page 9

Section 7 Differential protection.................................................................................... 113
7.1 High impedance differential protection, single phase HZPDIF (87)..................................... 113
7.1.1 Identification.................................................................................................................................. 113
7.1.2 Application......................................................................................................................................113
7.1.2.1
7.1.3 Connection examples for high impedance differential protection.................................... 120
7.1.3.1
7.1.3.2
7.1.4 Setting guidelines......................................................................................................................... 122
7.1.4.1
7.1.4.2
7.1.4.3
7.1.4.4
7.1.4.5
Section 8 Current protection.......................................................................................... 129
8.1 Instantaneous phase overcurrent protection PHPIOC (50)....................................................129
8.1.1 Identification..................................................................................................................................129
8.1.2 Application..................................................................................................................................... 129
8.1.3 Setting guidelines......................................................................................................................... 129
8.1.3.1
8.1.3.2
8.2 Directional phase overcurrent protection, four steps OC4PTOC(51_67).............................133
8.2.1 Identification................................................................................................................................. 134
8.2.2 Application..................................................................................................................................... 134
8.2.3 Setting guidelines......................................................................................................................... 135
8.2.3.1
8.2.3.2
8.3 Instantaneous residual overcurrent protection EFPIOC (50N)............................................. 144
8.3.1 Identification................................................................................................................................. 144
8.3.2 Application..................................................................................................................................... 144
8.3.3 Setting guidelines.........................................................................................................................144
8.4 Directional residual overcurrent protection, four steps EF4PTOC (51N/67N)................... 147
8.4.1 Identification..................................................................................................................................147
8.4.2 Application..................................................................................................................................... 147
8.4.3 Setting guidelines.........................................................................................................................149
8.4.3.1
8.4.3.2
8.4.3.3
8.4.3.4
8.4.3.5
8.4.3.6
Bay control REC670
Application manual
The basics of the high impedance principle.......................................................................115
Connections for three-phase high impedance differential protection........................120
Connections for 1Ph High impedance differential protection HZPDIF (87).................121
Configuration........................................................................................................................... 122
Settings of protection function............................................................................................122
T-feeder protection................................................................................................................. 123
Tertiary reactor protection....................................................................................................126
Alarm level operation.............................................................................................................. 128
Meshed network without parallel line................................................................................. 130
Meshed network with parallel line........................................................................................132
Settings for each step............................................................................................................ 136
Setting example.......................................................................................................................139
Common settings for all steps............................................................................................. 149
2nd harmonic restrain............................................................................................................ 150
Parallel transformer inrush current logic............................................................................ 151
Switch onto fault logic............................................................................................................151
Settings for each step (x = 1, 2, 3 and 4)............................................................................. 152
Line application example....................................................................................................... 154
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