ABB RET670 - Page 13

Completing the test..............................................................164
Frequency protection......................................................................164
Underfrequency protection SAPTUF ........................................164
Verifying the settings............................................................164
Completing the test..............................................................165
Overfrequency protection SAPTOF ..........................................165
Verifying the settings............................................................165
Completing the test..............................................................166
Rate-of-change frequency protection SAPFRC
........................166
Verifying the settings............................................................166
Completing the test..............................................................167
Multipurpose protection..................................................................167
General current and voltage protection CVGAPC.....................167
Built-in overcurrent feature (non-directional)........................168
Overcurrent feature with current restraint.............................168
Overcurrent feature with voltage restraint............................169
Overcurrent feature with directionality..................................169
Over/Undervoltage feature...................................................170
Completing the test..............................................................170
Secondary system supervision.......................................................170
Current circuit supervision CCSRDIF .......................................170
Verifying the settings............................................................170
Completing the test..............................................................171
Fuse failure supervision SDDRFUF..........................................171
Checking that the binary inputs and outputs operate as
expected ..............................................................................171
Measuring the operate value for the negative sequence
function ................................................................................172
Measuring the operate value for the zero-sequence
function ................................................................................173
Checking the operation of the du/dt and di/dt based
function ................................................................................173
Completing the test..............................................................174
Control............................................................................................174
Synchrocheck, energizing check, and synchronizing
SESRSYN.................................................................................174
Testing the synchronizing function.......................................176
Testing the synchronizing check..........................................177
Testing the energizing check................................................179
Testing the voltage selection................................................181
Completing the test..............................................................181
Apparatus control APC..............................................................181
Interlocking................................................................................182
Voltage control VCTR................................................................182
Table of contents
7
Installation and commissioning manual