MTE Guard-AC reactors brochure

Benefits of Using Line/Load Reactors

Guard-AC line/load reactors help keep your equipment running
longer by absorbing many of the power line disturbances which
otherwise damage or shut down your inverters, variable speed
controllers, or other sensitive equipment. They are the modern
technology solution to inverter and drive application problems.
Guard-AC reactors are harmonic compensated & IGBT protected
to assure optimum performance in the presence of harmonics.
They are very effective at reducing harmonics produced by
inverters and drives, and in most cases will help you to meet IEEE

519. Use our harmonic compensated reactors on either the input
or output of an adjustable speed drive/inverter. There is no need
to de-rate our "harmonic compensated" reactors for harmonics.

Guard-AC reactors are manufactured to the exacting standards of
MIL-1-45208, VDE-0550, are UL recognized & CSA certified. All
UL approvals are for USA & Canada.

• UL-506 File #E53094 (lamp through 1200 amps)

• CSA File #LR29753-13 (1200 amps or less) 9

• UL-508 File #El80243 (1 amp through 1200 amps)

All higher current reactors offer UL recognized insulation systems
and construction.

Impedance Rating

3% impedance reactors

are typically sufficient

to absorb power line spikes

and motor current surges.

They will prevent nuisance tripping

of drives

or circuit breakers

in most applications.

3-Phase Reactors

Line/Load Reactors

• Protect Motors from Long Lead Effects

• Reduce Output Voltage dv/dt

• Virtually Eliminate Nuisance Tripping

• Extend Semiconductor Life

• Reduce Harmonic Distortion

• Reduce Surge Currents

• Reduce Motor Temperature

• Reduce Motor Audible Noise

• Improve True Power Factor

•

Helps Meet IEEE 519 or IEC 1000-3-4

5% impedance reactors

are best for

reducing harmonic currents

and frequencies.

Use them when

you must comply with

IEEE 519,

to reduce

motor operating temper at ur e,

or to

reduce motor noise.

Harmonic Reduction

Because all standard Guard-AC reactors are compensated
for harmonics (current and frequency), they are extremely
effective at reducing the amount of harmonics which are
produced by a drive/inverter. Use 5% impedance, harmonic
compensated reactors for best reduction of harmonic
distortion.

Percent Harmonics vs Total Line Impedance

Total Input Impedance

Harmonic3%4%5%6%7% 8% 9%10%

5th 4034323028 26 24 23

7th 1613121110 9 8.37.5

11th 7.3 6.3 5.8 5.2 5 4.3 4.2 4

13th 4.9 4.2 3.9 3.6 3.3 3.15 3 2.8

17th 3 2.4 2.2 2.1 0.9 0.7 0.5 0.4

19th 2.2 2 0.8 0.7 0.4 0.3 0.25 0.2

%THID 44.13 37.31 34.96 32.65 30.35 28.04 25.92 24.68

TRMS 1.09 1.07 1.06 1.05 1.05 1.04 1.03 1.03

Reactor Linearity

This curve illustrates the linearity of Guard-AC reactors. Even at
150 percent of their current rating, these reactors still have 100%
of their nominal inductance. This assures maximum filtering of
distortion even in the presence of severe harmonics and best
absorption of surges. The typical tolerance on rated inductance is
plus-or-minus 5 percent.