ABB ret650 - Page 10

Transformer application example......................................... 129
Thermal overload protection, two time constants TRPTTR ...........133
Identification.............................................................................. 133
Application................................................................................. 133
Setting guideline........................................................................ 134
Breaker failure protection CCRBRF............................................... 136
Identification.............................................................................. 136
Application................................................................................. 137
Setting guidelines...................................................................... 137
Pole discordance protection CCPDSC........................................... 140
Identification.............................................................................. 141
Application................................................................................. 141
Setting guidelines...................................................................... 141
Section 8 Voltage protection........................................................ 143
Two step undervoltage protection UV2PTUV ................................143
Identification.............................................................................. 143
Application................................................................................. 143
Setting guidelines...................................................................... 144
Equipment protection, such as for motors and generators...144
Disconnected equipment detection...................................... 144
Power supply quality ........................................................... 144
Voltage instability mitigation................................................. 144
Backup protection for power system faults...........................144
Settings for two step undervoltage protection...................... 145
Two step overvoltage protection OV2PTOV ..................................146
Identification.............................................................................. 146
Application................................................................................. 147
Setting guidelines...................................................................... 147
Equipment protection, such as for motors, generators,
reactors and transformers.................................................... 148
Equipment protection, capacitors......................................... 148
Power supply quality............................................................ 148
High impedance earthed systems........................................ 148
The following settings can be done for the two step
overvoltage protection.......................................................... 148
Two step residual overvoltage protection ROV2PTOV ................. 151
Identification.............................................................................. 151
Application................................................................................. 151
Setting guidelines...................................................................... 151
Equipment protection, such as for motors, generators,
reactors and transformersEquipment protection for
transformers......................................................................... 152
Equipment protection, capacitors......................................... 152
Table of contents
4 Transformer protection RET650 2.2 IEC
Application manual