ABB REL670 Installation And Commissioning Manual page 134

9.1.5
126
Multipurpose protection
Procedure
1. Connect the test set for injection of 3-phase currents and 3-phase
voltages to the appropriate current and voltage terminals of IED670.
2. Inject current(s) and voltage(s) in a way that relevant measured (ac-
cording to setting parameter CurrentInput and VoltageInput ) cur-
rents and voltages are created from the test set.
3. Set the relevant measuring quantity current to lag or lead (lag for
negative rca angle and lead for positive rca angle) the relevant polar-
izing quantity voltage by an angle equal to the set relay characteris-
tic angle (rca-dir) when forward directional feature is selected and
the CTstarpoint configuration parameter is set to ToObject .
If reverse directional feature is selected or CTstarpoint configuration pa-
rameter is set to FromObject the angle between current and polarizing
voltage shall be set equal to rca-dir+180 ° .
4. Overall check in principal as above (non-directional overcurrent fea-
ture)
5. Reverse the direction of the injection current and check that the pro-
tection does not operate.
6. Check with low polarization voltage that the feature becomes non-di-
rectional, blocked or with memory according to the setting.
Over/Undervoltage feature
Procedure
1. Connect the test set for injection 3-phase voltages to the appropriate
voltage terminals of IED670.
2. Inject voltage(s) in a way that relevant measured (according to set-
ting parameter VoltageInput ) voltages are created from the test set.
3. Overall check in principal as above (non-directional overcurrent fea-
ture) and correspondingly for the undervoltage feature.
Chapter 11
Verifying settings by secondary
injection