Power Derating; Protection Mode Settings - ComAp IG-NT GC Reference Manual

It is possible to configure both binary inputs (Remote TEST and Test on load) to only one controller physical
binary input internally.

Power derating

This function linearly decreases genset nominal power according to analog input value.
Gen-set power starts decreasing when temperature measured by Analog input PowerDeratingX exceeds
DeratingX strt value.
Gen-set power is at DeratedX pwr value when temperature measured by Analog input Power deratingX is
equal or higher than DeratingX end value.
Hint:
To use Power derating function configure at first Analog input PowerDeratingX to any IGS-NT or IS-AIN
analog input terminal by GenConfig.
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.

Protection mode settings

Protections in this application are affected by Setpoint ProtectionMode (group ProcessControl).
This setpoint is active in MAN,SEM and AUT mode.
Setpoint ProtectionMode has 2 options of settings:
ACTIVE:
Standard setting – all protections are active, in case of 2
(2-nd level alarms are evaluated, GCB or MCB is controlled)
NOT ACTIVE:
2-nd level alarms are evaluated only , but GCB or MCB are NOT controlled (no actions).
Exceptions are Emergency Stop and Sd override alarms type.
Inteli NT GeCon-MARINE SPI, SW Version 3.2, ©ComAp – July 2015
IGS-NT-GeCon-MARINE-SPI-3.2.PDF
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.
nd
level alarm the breaker is opened/controlled.
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