Power chokes
Instruction handbook
b maXX
BM5500, BM5600, BM5700
Document No.: 5.13008.10
Baumüller Nürnberg GmbH
288
11.4
11.4 Power chokes
Current
Select the power chokes dependent upon your application and based on the input rated
current. Take into account that the max. input current of the chokes may not lead to sat-
uration.
Inductance
Select the power chokes depending on the short-circuit voltage of the power supply, so
that the required inductance of the power supply refer to
on page 50 is adhered to.
NOTE!
UL certified power chokes must be used in UL compliant machines/systems.
NOTE
There is a different short-circuit voltage with the same choke at 60 Hz than there is at
50 Hz; according to the formula u
k
= (
L
I
N
3) / U
N
(with
= 2
f) the short-circuit
voltage that would result at another power supply frequency can be calculated.
NOTE
The nominal inductance is constant up to 1.1 times of nominal current. You can ex-
pect that the inductance is reduced if the current flow through the commutation choke
is higher than this value. If it is important for the application, that the commutation in-
ductance is equal its nominal value when for longer time (e. g. with 30 s or 60 s) peak
current at peak power is needed, chose a commutation choke with a peak current
smaller or equal of the 1.1 times of the nominal value of the commutation choke.
If you have any doubt selecting a commutation choke for a specific application,
please contact the responsible sales representative of Baumüller.
NOTE
At installation heights higher than 1000 m above MSL the current must be reduced
for 10 % per 1000 m.
At operation temperatures from 40 °C up to 55 °C the current must be reduced for
1 % per °C
Summary of Contents for b maXX 5500
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