IGS-NT Combi, SW Version 3.0, ©ComAp – May 2013
IGS-NT-Combi-3.0 Reference Guide.PDF
NOTE:
Although the resolution of this setpoint is 0.01s, in fact the adjusted delay is
rounded to the next higher multiple of the period of the mains voltage. The period
is either 0.02s for 50Hz systems or 0.0166s for 60Hz systems. E.g. if the delay is
set to 0.03s at 50Hz system the real delay will be 0.04s.
Setpoint: VectorS prot
DISABLED, PARALLEL ONLY, ENABLED [-]
This setpoint selects the function of the built-in vectorshift protection.
The vectorshift protection is disabled.
The vectorshift protection is enabled only while the gen-set
is running parallel to the mains, i.e. the both MCB and GCB
are closed.
The vectorshift protection is active always while the MCB is
closed, regardless of the GCB position.
NOTE:
The vectorshift protection is recorded into the history file, however it is not
indicated in the Alarm list. When it occurs the controller opens either MCB or GCB
depending on the setpoint VS/ROCOF CB sel (in SPI aplication GCB is always
opened, VS/ROCOF CB sel setpoint is not available). If the MCB is not controlled
in the particular application then GCB is opened.
NOTE:
If a vectorshift is detected and consequently the MCB is opened, however mains
voltage and frequency remain in limits, the MCB is then reclosed again after
Mains ret del, as the mains is evaluated as healthy.
Setpoint: VS/ROCOF CBsel
This setpoint selects which breaker will be opened when the vectorshift or
ROCOF protection is detected.
NOTE:
If the GCB is selected and a mains failure occurs the GCB will be opened
immediately when the vectorshift or ROCOF is detected, however also MCB will
be opened consequently due to other mains protection as underfrequency or
undervoltage.
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