EMC Manual ServodynT, D
Switch cabinet structure
314
1070 066 074-101
3.6
Mains filters
When a filter is installed in the mains supply cable the interference limit val
ues A or B depending on the filter type are adhered to in accordance with
the EN 55011 (DIN VDE 087511).
! DANGER !
Mains filters contain capacitors and discharge resistors which still carry lethal voltages even after
the mains voltage has been switched off.
Do not touch the power terminals with a tool until at least 10 seconds have passed!
Use a mains filter in the drives' supply line in order to avoid mainsborne
disturbance voltages in the supply system:
d
Attach the filter directly to the partition so that the incoming cables
have the shortest path through the partition to the filter.
d
If this is not possible, it will be necessary to preserve a continuous dis
tance of > 500 mm between the mains supply cable to the mains filter
and the motor lines.
.
Note
The effectiveness of the filter is determined by the quality of the filter's
earthing connection:
ÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉ
ÉÉÉ
ÉÉÉ
Z
E
Mains filter
INCORRECT!
ÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉ
Mains filter
CORRECT!
Earth connection by means of connec
tion lead to the metal housing
Flat chassis earth connection to the
metal housing via pressin bolts or
pressin nuts (cold weld joint)
ÉÉ
ÉÉ
ÉÉ
ÉÉ
ÉÉ
.
Note
The effect of the filter is determined to a great extent by its placing
within the switch cabinet.
ÉÉÉÉ
ÉÉÉÉ
CORRECT!
ÉÉ
ÉÉ
ÉÉ
ÉÉ
ÉÉ
ÉÉ
ÉÉ
ÉÉ
DM
VM
Mains filter
DM DM
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉ
ÉÉÉ
ÉÉ
ÉÉ
ÉÉ
DM
VM
DM DM
ÉÉÉÉÉ
ÉÉÉÉÉ
ÉÉ
ÉÉ
ÉÉ
ÉÉ
ÉÉ
ÉÉ
INCORRECT!
Mains filter
!
3.2
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