SECTION
NON-LINEAR LOAD ISOLATION
®
TRANSFORMERS
ACME ELECTRIC
•
MILWAUKEE, WI
•
800.334.5214
•
acmetransformer.com
38
Non-linear loads generate high levels of harmonic currents. When
supplying power to these loads, a special transformer design is
necessary.
Typical non-linear loads include desktop computers, AC variable
speed drives, HID lighting, electronic ballasts, inverters and welders.
Of these non-linear loads, the major source of harmonic currents is
the switch mode power supply found in desktop computers, data
processors and other office equipment.
Acme non-linear load isolation transformers use special winding
techniques to minimize eddy current losses generated by
harmonic currents. A double-sized neutral conductor handles the
excessive neutral current found in non-linear load applications.
The amount of harmonics produced by a given load is represented by
the term “K” factor. The larger the “K” factor, the more
harmonics are present. Linear loads have a “K” factor of 1; switch
mode power supplies typically have a “K” factor as high as 20.
Acme non-linear load isolation transformers are shielded for cleaner
power and carry the Acme exclusive 10-year limited warranty.
Non-Linear Load Isolation
®
Transformers
*
These ratings are to be used as a guide
only. They may vary from one load equipment
manufacturer to another. A Spectrum Analysis is the
best source.
Note:
Non-sinusoidal and non-linear are
synonymous terms relating to the same
transformer type.
K-Factor/Type of Load
K-1
Resistance heating
Incandescent lighting
Motors
Transformers, control/distribution
K-4
Welders
Induction heaters
HID lighting
Fluorescent lighting
Solid state controls
K-13
Telecommunications equipment
Branch Circuits in classrooms
and health care facilities
K-20
Main frame computers
Variable speed drives
Branch circuits with exclusive
loads of Data Processing
equipment
Desktop computers
The following guide will help you select the proper
transformer when the K-factor is unknown.*
FEATURES
Q
Available in K-factors of 4, 13 and 20. Consult factory
for other K-factors.
Q
150°C, 115°C and 80°C temperature rise units.
Q
10-year limited warranty.
Q
UL Listed and CSA Certified.
Q
Available in 480V and 600V primary,15 through 600 kVA.
Q
Primary taps: (2) 2
1
/
2
% ANFC, (4) 2
1
/
2
% BNFC.
Q
Aluminum windings
