Technical data, 3d t – Lenze 8400 protec Manual User Manual
Page 57
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Technical data
Overcurrent operation
l
57
EDS84DPS424 EN 5.0
The curves of typical load functions and the simulation of the "Ixt" function are shown in
the following illustration:
t
0
100
2
0
1
I
[%]
aN8
3
Dt
1
Dt
2
Dt
3
Dt
4
8400IZ180
Fig. 4−2
Overcurrent capacity at 45° C
Pulse load (15 s cycle)
Calculation equation:
0
Peak current
A @ Dt
1
)B @ Dt
2
Dt
1
)Dt
2
x 100%
1
Unloading current
Dt
1
Peak current period
Dt
2
Unloading current period
Permanent load (180 s cycle)
Calculation equation:
2
Peak current
C @ Dt
3
)D @ Dt
4
Dt
3
)Dt
4
x 100%
3
Unloading current
Dt
3
Peak current period
Dt
4
Unloading current period
I
arx
Rated value of continuous output
current
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