Emerson Offers Buck-Boost Control Panel Transformers

Contractors and companies that need low-cost, compact and light-weight 
control panel transformers can turn to the SolaHD buck-boost line by 
Emerson. <br><br>Buck-Boost transformers are small, single phase, dry 
type distribution transformers designed and shipped as 
insulating/isolating transformers. Emerson SolaHD

James R. Dukart

Contractors and companies that need low-cost, compact and light-weight control panel transformers can turn to the SolaHD buck-boost line by Emerson.

Buck-Boost transformers are small, single phase, dry type distribution transformers designed and shipped as insulating/isolating transformers. Each has a dual voltage primary and dual voltage secondary, allowing connection to a wide range of voltage combinations.

The most common use is to “buck” (lower) or “boost” (raise) supply voltages in small increments, often between 5 to 27 percent. Buck-boost transformers are in compliance with NEC Article 210-9, Exception 1 when field connected as autotransformers.

In addition to lower cost, more compact size, lighter weight and the ability to step voltage up or down in narrower ranges, buck-boost transformers are also more efficient than equivalent isolation transformers. When connected as an autotransformer, a buck-boost can handle loads up to 20 times the nameplate rating.

When a buck-boost has the primary and secondary windings connected it becomes an autotransformer, with only the secondary windings transforming voltage and current. Thus the majority of kVA load passes directly from supply to load, allowing the transformer to supply a load with a much larger kVA rating than the nameplate indicates.

SolaHD buck-boost transformers are designed to supply power to low voltage lighting circuits, control panels or other systems requiring 12, 16, 24, 32, or 48 Volts. When connected as an in- sulating transformer, the transformer’s capacity matches the nameplate kVA rating. SolaHD buck-boost transformers are also suited for low voltage landscape lighting and are UL listed for outdoor service. The transformers relatively small size works well in combination with outdoor accent lighting.

When using dimmers for low voltage lighting applications, contractors should use dimmers on the output of the transformer that are designed and rated for use with magnetic loads. On its Web site, Emerson offers specifications for its SolaHD buck-boost transformers as well as all accessories.


Photo courtesy of Emerson SolaHD