installing, operating or maintaining electrical equipment.
▪
Always connect the filter to protective earth (PE) first, then continue with the wiring of phase/neutral
terminals. When decommissioning the filter, remove the PE connection at the end.
▪
Follow the general installation and environmental condition notes closely. Ensure that cooling slots
(if any) are free from obstructions that could inhibit efficient air circulation. Operate the filter within its
electrical, mechanical, thermal and ambient specifications at all times.
▪
The internal module of the low harmonic filter is an electrical component that generates heat loss.
Internal components and external surfaces of the product may generate heat under load operating
conditions. Never remove the cover during operation. Never touch the internal heating part as it may
cause burns. It is necessary to beware of human body contact with heating parts even after stopping
the operation. Be sure to wear protective gloves when removing and inspecting the cover after
stopping operation.
▪
At altitudes above 2000m, please contact LS Electric prior to installation.
▪
Product performance and stable operation are not guaranteed when low harmonic filters are applied
to devices other than LS Electric’s inverters. In case of application to devices and applications other
than LS Electric inverter, please contact local LS Electric representative. LS Electric and the
manufacturer will not assume liability for any process downtime, loss or damage resulting from the
usage of filters outside their application specifications.
▪
In case of uncertainty and questions please contact to your local LS Electric partner for assistance
3.
Performance guarantee
Selecting and installing the appropriate HFS passive harmonic filter in a variable frequency AC drive application,
variable speed drive application within our published technical specifications we guarantee that the input current
distortion will be less than or equal to 5% THID for standard HFS series filters at rated power. HFS harmonic
filters can also provide similar performance in other drive applications such as constant torque, DC drives or
other phase controlled rectifiers, e.g. SCR drives, but actual THID levels can vary by load and/or speed and/or
firing angle of thyristors and therefore cannot be guaranteed. Consult your local LS Electric representative for
assistance when applying HFS harmonic filters on these types of equipment.
3.1.
Minimum system requirements
Performance level of this filter is guaranteed when the following system conditions are met:
▪
Type of load : Any 3-phase equipment with front-end six-pulse diode rectifier
▪
Type of source : 3-phase power line without neutral
▪
Line impedance : < 3% (calculated for the rated filter power)
▪
Line frequency : 50Hz ±1Hz (HFS-XXXX-3-50), 60Hz ±1Hz (HFS-XXXX-5-60)
▪
Line voltage : Nominal line voltage ±10%
▪
Line voltage unbalance : < 1%
▪
Line voltage distortion : THVD < 2%
3.2.
Important user notice
HFS Low Harmonic Filters are designed for the operation on the input (grid) side of LS Electric
inverters in a three-phase power system. In addition, filter suitability for a given application should
be determined by the user. LS Electric will not assume liability for any process downtime, loss or
damage resulting from the usage or application of HFS Low Harmonic Filters that are outside of
their specification. HFS Low Harmonic Filter should not be used for single phase or split-phase
applications.