Instruction Manual

Technical data
Overcurrent o peration
4

72
EDS84ASC552 EN 9.1
The curves of typical load functions and the simulation of the ”Ixt” function are shown in
the following illustration:
t
0
100%
1
0
2
I [%]
aN8
T
2
T
3
T
4
T
1


8400IZ180
Fig. 4-2 Overcurrent capacity in 230/400 V operation at 45° C

Pulse load (15 s cycle)
Calculation equation:

Peak current
A ⋅ T
1
+C ⋅ T
2
T
1
+T
2
≦ 100%

Unloading current
T
1
Peak current period
T
2
Unloading current period
 Permanent load (180 s cycle) Calculation equation:
 Peak current
B ⋅ T
3
+C ⋅ T
4
T
3
+T
4
≦ 100%
 Unloading current
T
3
Peak current period
T
4
Unloading current period
I
aNx
Rated value of continuous output
current
15-s cycle 
f=2kHz f=4kHz f=8kHz f = 16 kHz
       
I
amax
/I
aN8
[%] 200 75 200 75 200 75 133 50
180-s cycle 
f=2kHz f=4kHz f=8kHz f = 16 kHz
       
I
amax
/I
aN8
[%] 150 75 150 75 150 75 100 50
 Tip!
For c alculations of application-specific cycles please contact your Lenze contact
person.