ABB Relion REC670 Applications Manual page 10

Table of contents
7.11 Pole discordance protection CCPDSC........................................................................................151
7.11.1 Identification.............................................................................................................................. 152
7.11.2 Application.................................................................................................................................. 152
7.11.3 Setting guidelines......................................................................................................................152
7.12 Directional underpower protection GUPPDUP........................................................................ 153
7.12.1 Identification.............................................................................................................................. 153
7.12.2 Application.................................................................................................................................. 153
7.12.3 Setting guidelines......................................................................................................................155
7.13 Directional overpower protection GOPPDOP ..........................................................................158
7.13.1 Identification.............................................................................................................................. 158
7.13.2 Application.................................................................................................................................. 158
7.13.3 Setting guidelines..................................................................................................................... 160
7.14 Broken conductor check BRCPTOC ........................................................................................... 163
7.14.1 Identification.............................................................................................................................. 163
7.14.2 Application.................................................................................................................................. 163
7.14.3 Setting guidelines......................................................................................................................163
7.15 Capacitor bank protection CBPGAPC........................................................................................ 163
7.15.1 Identification.............................................................................................................................. 164
7.15.2 Application..................................................................................................................................164
7.15.2.1 SCB protection........................................................................................................................166
7.15.3 Setting guidelines......................................................................................................................167
7.15.3.1 Restrike detection..................................................................................................................169
7.16 Voltage-restrained time overcurrent protection VRPVOC.................................................... 169
7.16.1 Identification.............................................................................................................................. 169
7.16.2 Application.................................................................................................................................. 170
7.16.2.1 Base quantities....................................................................................................................... 170
7.16.2.2 Application possibilities....................................................................................................... 170
7.16.2.3 Undervoltage seal-in.............................................................................................................. 171
7.16.3 Setting guidelines...................................................................................................................... 171
7.16.3.1 Explanation of the setting parameters.............................................................................. 171
7.16.3.2 Voltage-restrained overcurrent protection for generator and step-up
transformer..............................................................................................................................172
7.16.3.3 Overcurrent protection with undervoltage seal-in.......................................................... 173
Section 8 Voltage protection......................................................................................... 175
8.1 Two step undervoltage protection UV2PTUV ..........................................................................175
8.1.1 Identification.............................................................................................................................. 175
8.1.2 Application.................................................................................................................................. 175
8.1.3 Setting guidelines......................................................................................................................175
8.1.3.1 Equipment protection, such as for motors and generators......................................... 176
8.1.3.2 Disconnected equipment detection...................................................................................176
8.1.3.3 Power supply quality .............................................................................................................176
8.1.3.4 Voltage instability mitigation.............................................................................................. 176
8.1.3.5 Backup protection for power system faults..................................................................... 176
8.1.3.6 Settings for Two step undervoltage protection.............................................................. 176
8.2 Two step overvoltage protection OV2PTOV ............................................................................178
8.2.1 Identification.............................................................................................................................. 178
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Application manual