IGS-NT Combi, SW Version 3.0, ©ComAp – May 2013
IGS-NT-Combi-3.0 Reference Guide.PDF
NOTE:
In Combi-SPI application GCB is always opened regardless of this setpoint. In
Combi-SPI application controller controls only GCB.
Setpoint: VectorS limit
This setpoint adjusts the thershold level for the vectorshift protection.
NOTE:
To adjust this setpoint properly, check the value Max VectorS. The value is
available on the controller screen, contains the maximal measured vectorshift
value since the gen-set has been synchronized to the mains and after opening of
GCB or MCB it is "frozen". In normal conditions the value should not be higher
than 3º and the most common setting of the threshold is about 7º.
Setpoint: ROCOF prot
DISABLED, PARALLEL ONLY, ENABLED [-]
This setpoint activates or deactivates ROCOF protection.
See also setpoints ROCOF Win, ROCOF df/dt and VS/ROCOF CB sel (not
available in SPI application).
Setpoint: ROCOF Win
This setpoint adjusts the averaging level for the ROCOF protection. It defines
number of periods of the mains voltage in which the ROCOF protection is
evaluated. The higher is the ROCOF Win the less sensitive is the protection for
short oscillations of the frequency to both directions from the nominal value and
the higher is the delay of evaluation.
Setpoint: ROCOF df/dt
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