Appendix
Overview of accessories
14
465
EDBCSXA064 EN 3.2
14.8.6 Mains chokes
It is not mandatory to use a mains choke for operating the ECS modules. The respective
application determines whether a mains choke is required or not.
Advantages when using a mains choke:
ƒ Lower system perturbations
– The waveform of the mains current is approximated to the sinusoidal shape.
– Reduction of the effective mains current by up to 25%.
– Reduction of the mains, cable and fuse load.
ƒ The effective DC−bus current also decreases by up to 25%.
ƒ Increased service life of the connected axis modules
– A mains choke reduces the AC current load of the DC−bus capacitors and thus
increases their service life.
ƒ Low−frequency radio interference voltages are reduced.
Please note:
ƒ With mains choke operation the maximally possible output voltage does not fully
reach the value of the mains voltage.
ƒ For operation of drives for accelerating duty with high peak currents, it is
recommended to use mains chokes with linear L/I characteristic (Lenze types
ELN3...).
ƒ The choke rating is to be checked and adapted to the respective conditions.
Mains chokes for the power supply modules:
Power supply module
type
Mains choke type I
r
[A] L
r
[mH]
Short−circuit
voltage (U
k
)
ECSxE012 ELN3−0150H024 3 x 24 3 x 1.5
4 %
ECSxE020 ELN3−0088H035 3 x 35 3 x 0.88
ECSxE040 ELN3−0055H055 3 x 55 3 x 0.55
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