SysteMax
Any facility that contains multiple computer
loads connected phase-to-neutral is susceptible to problems caused by
high harmonic currents. Particularly damaging is the 3rd-harmonic
current. It is not unusual to find a transformer, loaded with computers
to only 40%, that is operating near its upper temperature limit due to
3rd-harmonic currents The SysteMax Harmonic Suppression System , which
can be added to any existing transformer, operates by preventing
computers from generating 3rd-harmonic current. Since harmonic currents
are never produced, transformers can be loaded to rated capacity with no
danger of overheating. SysteMax is the best and most cost-effective
solution to computer-caused 3rd-harmonic currents and materially
contribute to a less harmful environment.
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TransMax
Any facility that contains multiple computer
loads connected phase-to-neutral is susceptible to problems caused by
high harmonic currents. Particularly damaging is the 3rd-harmonic
current. Engineers designing electrical systems for new construction or
replacing failed transformers often "over design"the system to protect
against possible transformer failure caused by extra 3rd-harmonic
currents. TransMax combines a quality transformer with a built-in and
pre-wired Harmonic Suppression System. This system operates by
preventing computers from generating 3rd-harmonic current. Reduction of
harmonic currents in the transformer results in much lower operating
temperatures. Reduction of harmonic currents in the phase wires means
that more useful current can be carried to power more computers.
Transformers can be loaded to rated capacity with no danger of
overheating. TransMax is the best and most cost-effective solution to
computer-caused 3rd-harmonic currents and, by reducing carbon emissions,
can contribute to LEEDS projects.
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GeneratorMax
The GeneratorMax is a passive, tuned harmonic
blocking filter. When tuned to 180Hz (the 3rd harmonic in a system with
a 60Hz fundamental frequency), the filter has a low impedance at the
fundamental and an almost infinite impedance at the 3rd harmonic.
Installed between the generator common connection and the system ground,
the filter blocks flow of 3rd harmonic current. At the same time, ground
continuity at 60Hz is maintained. Circulating 3rd harmonic ground
current is reduced to only a few amperes, and the ground-fault shunt
trip does not operate. The generator can now be loaded to full capacity.
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BearingMax
PWM drives use IGBT high-speed switches and
switch at high carrier frequencies (sometimes as high as 20 kHZ.) This
high-frequency switching results in lower perceived operational noise,
greater efficiency, and lower heat losses. However, the high-frequency
carrier can cause induced voltages in motor rotors. These voltages are
shorted to ground through the motor bearings, leading to electrical
pitting and, eventually, to fluting of the bearing races. Harmonics
Limited has developed a High-Frequency Reduction Filter (HFR) to impede
bearing failure, the BearingMax HFR filter. These filters work
particularly well for HVAC air-circulating fans.
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