ComAp InteliLite NT AMF26-P - Page 83

InteliLite
NT
AMF26-P, SW version 2.4, ©ComAp – January 2016 83
AMF26-P-2.4 Reference Guide.pdf
GShortCrct Sd [%]
Shutdown occurs when generator current reaches GShortCrct Sd limit.
Step: 1 % of Nominal current
Range: 100 - 500 %
GShortCrct Del [s]
Delay for generator short current alarm.
Step: 0,01s
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 - 60,0 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 900 sec = 15 minutes. IDMT protection is not active for Reaction time
values longer than 15 minutes.
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.
Overcurrent
200 % =
IDMT Curr
Del
≤ 100 %
101 %
110 %
Reaction time
0,2 s
No action
20 s
2 s
2 s
No action
200 s
20 s
20 s
No action
No action
(time > 900 s)
200 s
Amps IDMT Del * Nomin Current
Reaction time =
Igen - Nomin Current