IS-NT-Async-SPI, SW Version 1.2, ©ComAp – February 2011
IS-NT-Async-SPI-1.2.PDF
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Process control:
Derating1Start [X]
Derating1End [X]
Derated1Power [%]
Power derating 1
analog input
Nominal power
influences Overload
protection etc.
Power derating
Process control:
Derating2Start [X]
….
Power derating 2
analog input
TempByPwr Treq [ °C ] (FV)
Requested temperature value for temperature control by generator power.
Before use, you have to configure the analog input LdCtrl:TbyPwr.
Step: 1 °C
Range: ± 32000 °C
Force value possibility: Yes
TempByPwr gain [ % ]
Gain factor for Temperature by generator power control loop.
Step: 0,01 %
Range: 0,00 – 100,0 %
TempByPwr int [ % ]
Integration factor for Temperature by generator power control loop.
Step: 0,01 %
Range: 0,00 – 100,0 %
Overheat prot [ ENABLED / DISABLED ] (FV)
ENABLED: If the temperature measured from analog input “LdCtrl:TbyPwr” exceeds the value TbyPwr
Treq the gen-set power is decreased gradually to Min Power PtM. If the temperature
decreases below TbyPwr Treq the gen-set increases the power gradually to the original
requested value (Baseload, Imp/Exp....).
DISABLED: Overheat protection function is disabled. No power change if the temperature measured from
analog input “LdCtrl:TbyPwr” exceeds the value TbyPwr Treq.
Force value possibility: Yes
#Neutral cont. [ EACH / COMMON ]
Setpoint changes behavior of binary output Neutral CB C/O which is used for Neutral contactor control.
EACH: Four pole GCB’s are supposed on the engine.
a) When GCB is opened (after start, before stop):
Binary output Neutral CB C/O (Neutral contactor) closes when Generator voltage is higher than 75%
of Nominal voltage.
Binary output Neutral CB C/O (Neutral contactor) opens when Generator voltage is lower than 50%
of Nominal voltage.
b) Binary output Neutral CB C/O (Neutral contactor) is opened when gen-sets are running in parallel to
the mains (MCB is closed).
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