Appendix
Overview of accessories
467
EDBCSXS064 EN 4.0
13.5.6
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