5
NF line filter
Electromagnetic compatibility
Manual – Accessories
17
5
NF line filter
Type
LTE-B+
LTP-B
NF LT xxx xxx xx
X
X
X = available
− = not available
A line filter reduces interference emission via the line cable, which is generated by the
frequency inverter due to its operating principle. It mainly serves to meet interference
voltage limit requirements in the frequency range from 150 kHz to 30 MHz at the
power supply. In addition, a line filter dampens the interference from the supply sys-
tem affecting the frequency inverter.
All MOVITRAC
®
LT inverters are developed to minimize interference emission and to
ensure a high electromagnetic compatibility for the drives.
Additional EMC filters can be installed to:
•
Further reduce grid disturbances.
•
Minimize the risk of interference affecting other devices.
The line filter keeps back the interference voltages generated by the frequency in-
verter from the power supply system and feeds them back to the frequency inverter.
The use of line filters is recommended for the following requirements:
•
Reduced interference emission via the line cable.
•
Compliance with limit values.
•
Reduced equipotential bonding currents.
•
Reduced leakage currents in case of long motor cables.
5.1
Electromagnetic compatibility
With regard to interference emission, MOVITRAC
®
LT meets the limit values of the
standards EN 61800-3 and EN 55014 and can therefore be used in the industry and
for household applications (light industry).
5.1.1
Units with integrated filter
The tables below specify the conditions for using MOVITRAC
®
LT in inverter applica-
tions with internal filter:
Device type with filter
Cat. C1 (class B)
Cat. C2 (class A)
Cat. C3
In accordance with EN 61800-3
230 V, 1-phase
LTE-B xxxx 2B1-x-xx
LTP-B xxxx 2B1-x-xx
No additional filtering required.
Use a shielded motor cable.
23540052/EN – 06/2018
