ABB RET670 - Page 12

Checking the residual (earth fault) current operate value
IN> set below IP> .................................................................147
Checking the re-trip and back-up times................................147
Verifying the re-trip mode.....................................................147
Verifying the back-up trip mode............................................148
Verifying instantaneous back-up trip at CB faulty
condition...............................................................................149
Verifying the case RetripMode = Contact .............................149
Verifying the function mode Current&Contact ......................150
Completing the test..............................................................151
Pole discordance protection CCRPLD......................................151
Verifying the settings............................................................151
Completing the test..............................................................152
Directional underpower protection GUPPDUP .........................152
Verifying the settings............................................................152
Completing the test..............................................................154
Directional overpower protection GOPPDOP ...........................154
Verifying the settings............................................................154
Completing the test..............................................................155
Broken conductor check BRCPTOC ........................................155
Measuring the operate and time limit of set values..............155
Completing the test..............................................................155
Voltage protection...........................................................................156
Two step undervoltage protection UV2PTUV ...........................156
Verifying the settings............................................................156
Completing the test..............................................................156
Two step overvoltage protection OV2PTOV .............................156
Verifying the settings............................................................157
Completing the test..............................................................157
Two step residual overvoltage protection ROV2PTOV ............157
Verifying the settings............................................................157
Completing the test..............................................................157
Overexcitation protection OEXPVPH .......................................158
Verifying the settings............................................................158
Completing the test..............................................................158
Voltage differential protection VDCPTOV .................................159
Check of undervoltage levels...............................................159
Check of voltage differential trip and alarm levels................161
Check of trip and trip reset timers........................................162
Final adjustment of compensation for VT ratio
differences ...........................................................................163
Completing the test..............................................................163
Loss of voltage check LOVPTUV .............................................163
Measuring the operate limit of set values.............................163
Table of contents
6
Installation and commissioning manual