ComAp intelilite nt amf20

InteliLite
NT
– AMF20/25, SW version 2.2, ©ComAp – September 2014 79
IL-NT-AMF-2.2-Reference Guide.pdf
Step: 1h
Range: 0 – 10000 h
Gener Protect
Hint:
All electric protections when activated result in shutdown or BOC.
The generator protections are evaluated from different voltages based on ConnectionType setting:
 3W 4Ph – Ph-Ph voltage
 3W 3Ph – Ph-Ph voltage
 Split Ph – Ph-N voltage
 Mono Ph – Ph-N voltage
Overload BOC [%]
Threshold for generator overload (in % of Nominal power) protection. Protection is BOC (Breaker
Open and genset Cooldown).
Step: 1% of Nominal power
Range: 0 – 200%
Overload Del [s]
Delay for generator overload alarm.
Step: 0.1s
Range: 0 – 600.0 s
Short Crct BOC [%]
BOC (Breaker Open and genset Cooldown) occurs when generator current reaches Short Crct BOC
limit.
Step: 1 % of Nominal current
Range: 100 – 500 %
Short Crct Del [s]
Delay for generator shortcurrent alarm.
Step: 0.04s
Range: 0.00 – 10.00 s
*Amps IDMT Del [s]
IDMT curve shape selection. Amps IDMT Del is Reaction time of IDMT protection for 200%
overcurrent Igen = 2* Nomin Current.
Step: 0,1 s
Range: 0,1 – 600,0 s
IDMT is “very inverse” generator over current protection. Reaction time is not constant but depends on
generator over current level according following formula.
Hint:
Reaction time is limited up to 3600 sec = 1 hour. IDMT protection is not active for Reaction time values
longer than 1 hour.
Igen is maximal value of all measured phases of generator current.
EXAMPLE of Reaction time for different over current levels. Values in column 200% are IDMT Curr
Del.
Amps IDMT Del * Nomin Current
Reaction time =
Igen - Nomin Current