ABB REL670 2.2 IEC - Page 17

Identification.............................................................................. 520
Application.................................................................................520
Setting guidelines...................................................................... 522
Broken conductor check BRCPTOC ............................................. 526
Identification.............................................................................. 526
Application.................................................................................526
Setting guidelines...................................................................... 526
Voltage-restrained time overcurrent protection VRPVOC.............. 527
Identification.............................................................................. 527
Application.................................................................................527
Base quantities.....................................................................528
Application possibilities........................................................ 528
Undervoltage seal-in............................................................ 528
Setting guidelines...................................................................... 529
Explanation of the setting parameters..................................529
Voltage-restrained overcurrent protection for generator
and step-up transformer....................................................... 530
Overcurrent protection with undervoltage seal-in.................531
Section 10 Voltage protection........................................................ 533
Two step undervoltage protection UV2PTUV ................................533
Identification.............................................................................. 533
Application.................................................................................533
Setting guidelines...................................................................... 534
Equipment protection, such as for motors and generators...534
Disconnected equipment detection...................................... 534
Power supply quality ........................................................... 534
Voltage instability mitigation................................................. 534
Backup protection for power system faults...........................534
Settings for two step undervoltage protection...................... 535
Two step overvoltage protection OV2PTOV ..................................536
Identification.............................................................................. 536
Application.................................................................................537
Setting guidelines...................................................................... 537
Equipment protection, such as for motors, generators,
reactors and transformers.................................................... 538
Equipment protection, capacitors......................................... 538
Power supply quality............................................................ 538
High impedance earthed systems........................................ 538
The following settings can be done for the two step
overvoltage protection.......................................................... 538
Two step residual overvoltage protection ROV2PTOV ................. 541
Identification.............................................................................. 541
Application.................................................................................541
Table of contents
Line distance protection REL670 2.2 IEC 11
Application manual