Inteli NT MINT, SW Version 2.6, ©ComAp – November 2011
IGS-NT-MINT-2.6-Reference Guide.PDF
91
Step:
1 % of
Nomin power
Range:
0 – 100 % of
Nomin power
Force value possibility: Yes
Hint:
If the setpoint
Base load
is lower than setpoint
Gener protect
:
Min power PtM
, the gen-set requested load is
set to
Gener protect
:
Min power PtM
.
The value of
Min Power PtM
is ignored during Warming procedure.
The setpoint is used as a limit for
Low power
protection: if it becomes active, the load is ramped-down using
setpoint
Sync/Load strl: Load ramp
, to
Min power PtM
. After protection becomes inactive, the power
limitation is automatically terminated.
Ishort
[ % ]
If the level set in this setpoint is reached, the GCB is opened with delay defined in
Ishort del
. Intended for
shortcurrent detection.
Step:
1 % of
Nomin current
Range:
100 - 500 % of
Nomin current
Protection:
BreakerOpen & Cool-down.
Ishort del
[ s ]
Delay for generator shortcurrent protection.
Step:
0,02 s
Range:
0,00 – 10,00 s
Hint:
Ishort del can be set to 0,01 s but this value is rounded to the proximate controller evaluation period.
2Inom del
[ s ]
IDMT curve shape selection.
2Inom del
is the Reaction time of IDMT protection for 200% overcurrent
Igen = 2*
Nominal current
.
Step:
0,1
s
Range:
0,0 - 600,0
s
Protection:
BreakerOpen & Cool-down.
IDMT is inversely proportional to the generators overcurrent. The higher the overcurrent gets the less time
will elapse before the protection is activated.
When the IDMT protection is activated the GCB is opened, the event is recorded in the Alarmlist and History,
and the engine will cool down and stop.
Where Reaction time is the amount of time from IDMT detection to the opening of the GCB.
Hint:
The maximum allowable Reaction time is 900 sec.
Reaction time is the amount of time from IDMT detection to the opening of the GCB.
Igen is the maximum current of the three phases of generator current.
EXAMPLE of Reaction time for different over current levels.
Igen
[%]
<=100 101
102
105
110
120
150
200
2Inom
del
0,1
No action
10
5
2
1
0,5
0,2
0,1
0,2
No action
20
10
4
2
1
0,4
0,2
0,5
No action
50
25
10
5
2,5
1
0,5
1,0
No action
100
50
20
10
5
2
1
2Inom del
* Nomin current
Reaction time =
Igen - Nomin current
