Acme Electric Buck-Boost Transformers Sales Brochure

Buck-Boost Transformers

Buck Boost transformers are the
ideal solution anytime a line voltage
change in the 5-15% range is
required in single phase or three
phase applications.

Proper voltage is critical

With nearly two-thirds of all electrical loads being A.C. motor loads, maintenance of the proper voltage to that motor is very
important. If the supply line voltage is not maintained, motor winding current is increased causing reduced motor torque and
escalating motor temperature, all of which results in the rapid loss of insulation life expectancy.

Anytime you have a lower than standard voltage, equipment damage and failure can result.

Buck-boost transformers are an economical way to correct this potentially very serious problem. Anytime a line voltage change in
the 5-20% range is required, a buck-boost transformer should be considered as your first line of defense.

Where are buck-boost transformers used?

A typical buck-boost application is 120 volts in, 12 volts out for low voltage lighting or control circuitry. In most applications, this low
voltage transformer is field connected as an autotransformer. Buck-boost transformers provide tremendous capabilities and flexibility in
kVA sizes and input/output voltage combinations. Basically you get 75 different transformers... all in one convenient package.

Other buck-boost applications are, where (A) low supply voltage exists because equipment is installed at the end of a bus system;
(B) the supply system is operating at or over its design capacity; and (C) where overall consumer demands may be so high the utility
cuts back the supply voltage to the consumer causing a “brownout.”

Why use buck-boost instead of another type transformer ?

Take a look at the advantages and disadvantages of using a buck-boost transformer (autotransformer) compared to a standard
isolation transformer of the proper size and voltage combination.

Advantages Disadvantages

More efficient No circuit isolation

Smaller & lighter Cannot create a neutral

5-10 times increase in kVA

Versatile, many applications

Lower cost

Application voltages and kVA don‘t match the

nameplate voltages and kVA

Can buck-boost transformers be used on three-phase systems as well as single phase systems?
Yes. A single unit is used to buck or boost single phase voltage — two or three units are used to buck or boost three phase voltage. The
number of units to be used in a three - phase installation depends on the number of wires in the supply line. If the three-phase supply is 4
wire Y, use three buck-boost transformers. If the 3- phase supply is 3 wire Y (neutral not available), use two buck-boost transformers.

Alternatively, Acme Electric’s NEW 3 Phase Auto Buck Boost Transformers remove the need for multiple separate units and provide
the same great electrical advantages standard Buck Boost Transformers offer in one simple and convenient package.

T211688

2

T111683

Single Phase, .05 to 10.0 kVA
Encapsulated

Features

n

UL listed, CSA certified and UL 3R enclosure, meets or exceeds all listing criteria, including NEMA, ANSI, and

OSHA standards

n

Flexibility, can be used in single phase and three pase configurations

n

Reduce (buck) or raise (boost) line voltage from 5 - 20%

n

All copper lead wire terminations

n

Long Life, 80° C rise up to 0.15 kVA, and 115° C rise above 0.25 kVA

n

Can be used in Three Phase applications

Three Phase, 6.0 to 45 kVA
Encapsulated

Features

n

UL listed, CSA certified and UL 3R enclosure, meets or exceeds all listing criteria, including NEMA, ANSI,

and OSHA standards

n

One unit, instead of multiple for 3 phase applications

n

Time and installation cost savings as units come pre-wired from the factory

n

Smaller footprint compared to using three individual single phase units

n

Long Life, UL class 180° C insulation system, 115° C rise

3