ABB RELION 670 Series Applications Manual page 16

Table of contents
8.12 Directional overpower protection GOPPDOP ......................................................................... 443
8.12.1 Identification..............................................................................................................................443
8.12.2 Application................................................................................................................................. 443
8.12.3 Setting guidelines..................................................................................................................... 445
8.13 Broken conductor check BRCPTOC ...........................................................................................448
8.13.1 Identification............................................................................................................................. 448
8.13.2 Application................................................................................................................................. 448
8.13.3 Setting guidelines.....................................................................................................................448
8.14 Capacitor bank protection CBPGAPC....................................................................................... 448
8.14.1 Identification............................................................................................................................. 449
8.14.2 Application................................................................................................................................. 449
8.14.2.1 SCB protection........................................................................................................................451
8.14.3 Setting guidelines..................................................................................................................... 452
8.14.3.1 Restrike detection................................................................................................................. 454
8.15 Negativ sequence time overcurrent protection for machines NS2PTOC ......................... 454
8.15.1 Identification............................................................................................................................. 454
8.15.2 Application................................................................................................................................. 455
8.15.2.1 Features................................................................................................................................... 455
8.15.2.2 Generator continuous unbalance current capability......................................................456
8.15.3 Setting guidelines..................................................................................................................... 458
8.15.3.1 Operate time characteristic................................................................................................ 458
8.15.3.2 Start sensitivity...................................................................................................................... 459
8.15.3.3 Alarm function........................................................................................................................ 459
8.16 Voltage-restrained time overcurrent protection VRPVOC....................................................460
8.16.1 Identification............................................................................................................................. 460
8.16.2 Application................................................................................................................................. 460
8.16.2.1 Base quantities...................................................................................................................... 460
8.16.2.2 Application possibilities....................................................................................................... 461
8.16.2.3 Undervoltage seal-in..............................................................................................................461
8.16.3 Setting guidelines..................................................................................................................... 461
8.16.3.1 Explanation of the setting parameters............................................................................. 462
8.16.3.2 Voltage-restrained overcurrent protection for generator and step-up
transformer.............................................................................................................................462
8.16.3.3 Overcurrent protection with undervoltage seal-in......................................................... 463
Section 9 Voltage protection.........................................................................................465
9.1 Two step undervoltage protection UV2PTUV .........................................................................465
9.1.1 Identification..............................................................................................................................465
9.1.2 Application................................................................................................................................. 465
9.1.3 Setting guidelines..................................................................................................................... 465
9.1.3.1 Equipment protection, such as for motors and generators.........................................466
9.1.3.2 Disconnected equipment detection.................................................................................. 466
9.1.3.3 Power supply quality ............................................................................................................ 466
9.1.3.4 Voltage instability mitigation............................................................................................. 466
9.1.3.5 Backup protection for power system faults.................................................................... 466
9.1.3.6 Settings for Two step undervoltage protection............................................................. 466
9.2 Two step overvoltage protection OV2PTOV ........................................................................... 468
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Application manual