IGS-NT-BC, SW Version 1.2.0,
©ComAp – January 2019
IGS-NT-BC-1.2.0 Reference Guide.PDF
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Setpoint: FixVoltProtSel
Group
Basic settings
Range [units]
PHASE-NEUTRAL, PHASE-PHASE [-]
Related FW
3.0
Description
PHASE-NEUTRAL: The generator and mains/bus voltage protections are based
on phase-neutral voltages and the phase-neutral nominal voltages are taken as
100%.
PHASE-PHASE: The generator and mains/bus voltage protections are based on
phase-phase voltages and the phase-phase nominal voltages are taken as 100%.
N
OTE
:
Both options require different settings of protection levels to achieve identical
results.
E
XAMPLE
:
Phase-nominal voltage is 231V, actual voltages are L1N = 231V, L2N = 231V,
L3N = 219.5V => the L3N voltage is at 95% of the nominal. The same situation
evaluated from phase-phase voltages gives following results: nominal phase-
phase voltage is 400V, measured voltages are L12 = 400V, L23 = 390V, L31 =
390V => the L23 and L31 are at 97.5% of the nominal. It is obvious that if the
situation is evaluated from phase-neutral voltages the tripping level must be
adjusted to 95%, whereas the same situation evaluated from phase-phase
voltages require tripping level adjusted to 97.5%.
Setpoint: Nominal Freq
Group
Basic Settings
Range [units]
45 Hz .. 65 Hz
Related FW
3.0
Force value
possible
YES
Description
The setpoint adjusts nominal system frequency.
frequency.
is used as 100% for generator and mains/bus frequency
protections and as requested value for frequency regulation (except
synchronizing) if the setpoint
Setpoint: ControllerMode
Group
Basic Settings
Range [units]
OFF, MAN, SEM, AUT, TEST [-]
Related FW
3.0
Description
This setpoint can be used to select the controller mode. It is equivalent to
selecting the mode by the buttons on the front panel. Currently active mode is