5
NF line filter
Installation
Manual – Accessories
30
5.4
Installation
Disconnect the MOVITRAC
®
LT from the supply system before starting to work. Ob-
serve the corresponding operating instructions.
WARNING
Danger of electric shock. Dangerous voltage levels may still be present inside the
device and at the terminals up to 10 minutes after disconnection from the power
supply.
Severe or fatal injuries.
•
Before removing the power supply cable, disconnect MOVITRAC
®
LT from the
power supply and wait at least 10 minutes.
•
Install one line filter just before each frequency inverter.
•
As an alternative, you can also use a shared line filter for the entire control cabinet.
The common line filter is selected on the basis of the total current of all frequency
inverters.
•
Do not install any switching element (e.g. contactor) between the line filter and the
frequency inverter.
•
The voltage supply is connected to the filter. The ground conductor (PE) of the
supply system must be connected to the filter, otherwise the filter will not work.
•
Capacitors are installed between phase and ground in the filter, thus a leakage
current is flowing during normal operation. A proper grounding must therefore be
ensured. It needs to be connected before voltage is applied to the filter.
For more information about the EMC components, refer to the section "EMC compon-
ents" (→
16).
L1/L L2/N
L3
L1
'/N
L3'
PE
L1
L2
L3
U
W
M
V
PE
PE
L2
'/L'
'
3-phase
ND..LT
NF..LT
Power section
14631693707
23540052/EN – 06/2018
