Performance Guarantee
Select & install the appropriate HarmonicShield
®
Harmonic Filter in a variable
torque, variable frequency AC 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 HSD Series filters at full load, and less than
8% at 30% load. If a properly sized & installed filter fails to meet its specified
THID level, TCI will provide material for necessary modifications or replacement
filter at no charge.
HSD filters can also provide similar performance in other drive applications such
as constant torque, DC drives & other phase controlled rectifiers, but actual
THID levels can vary by load and/or speed & therefore cannot be guaranteed.
Consult factory for assistance when applying HSD filters on these types of
equipment.
MINIMUM SYSTEM REQUIREMENTS:
The guaranteed performance levels of this filter will be achieved when
the following system conditions are met:
Frequency:
60Hz ± 0.75Hz
System Voltage:
Nominal System Voltage (line to line) ±10%, No more
than 1.5% Source inductance
Balanced Line Voltage:
Within 0.5%
Background Voltage Distortion:
< 0.5% THVD
The input VFD current waveform shall be consistent with that of a VFD
with 3% AC line reactance at full load.
NOTE: The presence of background voltage distortion will cause motors & other
linear loads to draw harmonic currents.
Additional harmonic currents may flow into the HSD filter if there is harmonic
voltage distortion already on the system.
