IS-NT-Async-SPI, SW Version 1.2, ©ComAp – February 2011
IS-NT-Async-SPI-1.2.PDF
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When Power derating function is active the generator overload protection is based on the Derated power! ! !
Derated power value Pg derated is visible in the controller measure screen.
When derating function is not active the Derating power is equal to Nominal power.
Example :
Nomin power = 200 kW, Derating1 strt = 70 °C, Derating1 end = 100 °C, Derated1 pwr = 70 %.
Genset is running at Nominal power 200 kW. When temperature reached 70 °C the genset power starts
decreasing. When temperature reached 100 °C genset runs at 70 % of Nominal power = 140 kW. When
temperature increased above DeratingX end temperature level, gen-set power stays at DeratedX pwr level
140 kW.
Power
DeratedPower
Temperature
DeratingStart
Nominal power
DeratingEnd
Temperature derating function
decreases genset power depend
on setpoints DeratingX strt,
DeratingX end and DeratedX pwr.
Temperature derating starts at
DeratingX strt temperature.
At DeratingX end temperature
runs genset at DeratedX pwr
level.
Above DeratingX end
temperature Genset runs at
constant DeratedX pwr.
Engine states
Engine prelubrication
Hint:
To use Prelubrication, configure Binary output PRELUBR PUMP first.
Prelubrication is disabled in controller OFF mode or if Prelubr time is set to zero.
Binary output PRELUBR PUMP is opened when engine is running.
Prelubrication cycle starts with PrelubrPause after engine stop.
Prelubrication cycle starts immediately when controller power supply is switched on or when mode changes
from OFF to MAN or AUT or after Emergency stop was reset. An Alarmlist message “Not lubricated” is active
until this first lubrication cycle has been completed.
Engine cooling
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