Overcurrent Feature With Voltage Restraint; Overcurrent Feature With Directionality - ABB Relion 670 Series REL670 Commissioning Manual

1MRK 506 355-UEN A
10.8.1.3
10.8.1.4
Line distance protection REL670 2.1 IEC
Commissioning manual
Testing functionality by secondary injection

Overcurrent feature with voltage restraint

Procedure
1. Connect the test set for injection of three-phase currents and three-phase
voltages to the appropriate current and voltage terminals of the IED.
2. Inject current(s) and voltage(s) in a way that relevant measured (according to
setting parameter CurrentInput and VoltageInput) currents and voltages are
created from the test set.
Overall check in principal as above (non-directional overcurrent feature)
3. Operate value measurement
The relevant voltage restraining value (according to setting parameter
VoltageInput) has also to be injected from the test set and the influence on the
operate value has to be calculated when testing of the operate value is done.
4. Operate time measurement
Definite times may be tested as above (non-directional overcurrent feature). For
inverse time characteristics the START value (to which the overcurrent ratio has
to be calculated) is the actual pickup value as got with actual restraining from the
voltage restraining quantity.

Overcurrent feature with directionality

Please note that the directional characteristic can be set in two different ways either
just dependent on the angle between current and polarizing voltage (setting parameter
DirPrinc_OC1 or DirPrinc_OC2 set to or in a way that the operate value also is
dependent on the angle between current and polarizing voltage according to the I ·
cos(F) law (setting parameter DirPrinc_OC1 or DirPrinc_OC2 set to I · cos(F). This
has to be known if a more detailed measurement of the directional characteristic is
made, than the one described below.
Procedure
1. Connect the test set for injection of three-phase currents and three-phase
voltages to the appropriate current and voltage terminals of the IED.
2. Inject current(s) and voltage(s) in a way that relevant measured (according to
setting parameter CurrentInput and VoltageInput) currents 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 polarizing quantity voltage
by an angle equal to the set IED characteristic 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 parameter
is set to FromObject, the angle between current and polarizing voltage shall be
set equal to rca-dir+180°.
Section 10
187