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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
Delay for generator shortcurrent protection.
Step:
0,02 s
0,00 – 10,00 s
Range:
Hint:
Ishort del can be set to 0,01 s but this value is rounded to the proximate controller evaluation period.
2Inom del
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 - 60,0 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.
Reaction time =
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
2Inom del
0,1
No action 10
0,2
No action 20
0,5
No action 50
1,0
No action 100
2,0
No action 200
5,0
No action 500
10,0
No action No action 500
20,0
No action No action No action 400
Inteli NT GeCon-MARINE SPI, SW Version 3.2, ©ComAp – July 2015
IGS-NT-GeCon-MARINE-SPI-3.2.PDF
[ % ]
[ s ]
[ s ]
2Inom del * Nomin current
Igen -
Nomin current
101
102
105
5
2
10
4
25
10
50
20
100
40
250
100
200
110
120
150
1
0,5
0,2
2
1
0,4
5
2,5
1
10
5
2
20
10
4
50
25
10
100
50
20
200
100
40
200
0,1
0,2
0,5
1
2
5
10
20
85
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