InteliMains 210 Global Guide
187
Setpoint group
Bus Left Settings
Related FW
2.0.0
Range [units]
1,0 .. 180,0 [s]
Default value
4,0 s
Alternative config
NO
Step
0,1 s
Comm object
8283
Related applications
MCB, MGCB, BTB
Description
IDMT curve shape selection. IDMT Overcurrent Delay is a reaction time of IDMT protection for 200%
overcurrent I
gen
=2*
IDMT is “very inverse” over current protection. Reaction time is not constant but depends on over current
level according to the following formula:
=
I
Overcurrent IDMT Delay * Nominal Current
− Nominal Current
gen
Reaction time
Note:
Reaction time is limited to 3600 s = 60 minutes. IDMT protection is not active for Reaction time
values longer than 60 minutes.
I
gen
is maximal value of all measured phases of Bus Left current.
Table 8.1 EXAMPLE of Reaction time for different over current levels
Overcurrent IDMT Delay
Overcurrent
≤ 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
2000 s
200 s
Image 8.1 IDMT Overcurrent Delay
IDMT Overcurrent