Settings - ABB RELION 650 Series Applications Manual

Section 6
Differential protection
I3PW2CT1: Phase currents for winding 2 first current transformer set. Used for
autotransformers.
I3PW2CT2: Phase currents for winding 2 second current transformer set for multi-breaker
arrangements. Used when protecting an autotransformer. When not required, configure input
to "GRP-OFF".
Recommendation for Binary input signals
Refer to the pre-configured configurations for details.
BLOCK: The input will block the operation of the function. Can be used, for example, to block
for a limited time the operation during special service conditions.
Recommendation for output signals
Refer to pre-configured configurations for details.
START: The start output indicates that
TRIP: The trip output is activated when all operating criteria are fulfilled.
DIROK: The output is activated when the directional criteria has been fulfilled.
BLK2H: The output is activated when the function is blocked due to a too high level of second
harmonic.
6.2.3.2

Settings

The parameters for the restricted earth-fault protection, low impedance function REFPDIF are
set via the local HMI or PCM600.
Common base IED values for primary current (
power (
GlobalBaseSel : It is used to select a GBASVAL function for reference of base values.
Operation : The operation of REFPDIF can be switched On / Off .
IdMin : The setting gives the minimum operation value. The setting is in percent of the IBase
value of the chosen
value. A normal setting is 30% of power transformer-winding rated current for a solidly
earthed winding.
CTFactorPri1 : A factor to allow a sensitive function also at multi-breaker arrangement where
the rating in the bay is much higher than the rated current of the transformer winding. The
stabilizing can then be high so an unnecessary high fault level can be required. The setting is
normally 1.0 but in multi-breaker arrangement the setting shall be CT primary rating/
CTFactorPri2 : A factor to allow a sensitive function also at multi-breaker arrangement where
the rating in the bay is much higher than the rated current of the transformer winding. The
stabilizing can then be high so an unnecessary high fault level can be required. The setting is
normally 1.0 but in multi-breaker arrangement the setting shall be CT primary rating/
CTFactorSec1 : See setting CTFactorPri1 . Only difference is that CTFactorSec1 is related to W2
side.
CTFactorSec2 : See setting CTFactorPri2. Only difference is that CTFactorSec2 is related to W2
side.
84
SBase ) are set in a Global base values for settings function GBASVAL.
GlobalBaseSel . The neutral current must always be larger than half of this
Idiff is in the operate region of the characteristic.
IBase ), primary voltage ( UBase ) and primary
1MRK 504 158-UEN A
M13052-17 v7
M13052-21 v8
M13052-28 v12
IBase .
IBase .
Application manual