
Setting guidelines...................................................................... 117
Equipment protection, such as for motors, generators,
reactors and transformers.................................................... 118
Equipment protection, capacitors......................................... 118
Power supply quality............................................................ 118
High impedance earthed systems........................................ 118
The following settings can be done for the two step
overvoltage protection.......................................................... 118
Two step residual overvoltage protection ROV2PTOV ................. 121
Identification.............................................................................. 121
Application................................................................................. 121
Setting guidelines...................................................................... 121
Equipment protection, such as for motors, generators,
reactors and transformersEquipment protection for
transformers......................................................................... 122
Equipment protection, capacitors......................................... 122
Power supply quality............................................................ 122
High impedance earthed systems........................................ 122
Direct earthed system.......................................................... 123
Settings for two step residual overvoltage protection...........124
Loss of voltage check LOVPTUV .................................................. 126
Identification.............................................................................. 126
Application................................................................................. 126
Setting guidelines...................................................................... 126
Advanced users settings...................................................... 126
Section 8 Secondary system supervision.....................................127
Current circuit supervision CCSSPVC............................................127
Identification.............................................................................. 127
Application................................................................................. 127
Setting guidelines...................................................................... 127
Fuse failure supervision FUFSPVC................................................128
Identification.............................................................................. 128
Application................................................................................. 128
Setting guidelines...................................................................... 129
General.................................................................................129
Setting of common parameters............................................ 129
Negative sequence based....................................................130
Zero sequence based...........................................................131
Delta U and delta I ...............................................................131
Dead line detection...............................................................132
Section 9 Control..........................................................................133
Synchrocheck, energizing check, and synchronizing SESRSYN...133
Table of contents
4Breaker protection REQ650 2.2 IEC
Application manual