Buck-Boost transformers are small, single phase, dry type distribution transformers designed and shipped as insulating/isolating transformers. They have a dual voltage primary and a dual voltage secondary. These transformers can be connected for a wide range of voltage combinations. The most common use is to buck (lower) or boost (raise) the supply voltage a small amount, usually 5 to 27%. Buck-Boost transformers are in compliance with NEC Article 210-9, Exception 1 when field connected as an autotransformer.

The major advantages of Buck-boost transformers are their low cost, compact size and light weight. They are also more efficient and cost less than equivalent isolation transformers. When connected as an autotransformer, they can handle loads up to 20 times the nameplate rating. A buck-boost transformer is the ideal solution for changing line voltage by small amounts.

When a buck-boost has the primary and secondary windings connected, per recommended instructions, it becomes an autotransformer. Now only the secondary windings are transforming voltage and current. The majority of the KVA load passes directly from the supply to the load. This is why buck-boost transformers can supply a load with a much larger KVA rating than the nameplate indicates.   

A&S Transformer Department was founded in 2008,which belonges to A&S Machinery Co, Ltd,is a global supplier of transformer ,We are an experienced supplier for transformer,who assures our customers of the most reliable performance and the industrya€?s lowest failure rate.We can provide you with transformers with low costs but long wear life .With  development of many years, we had become professional in this field, own many channels to offer the  complete series of transformers and transformer accessories.
we offer both liquid-filled,dry-type,line, power ,audo, instrument, pulse ,tube transformers as well
as others with high reliability,low environmental impact.Brands are Hammond, ABB ,Tamura, Sola ,Jensen,Delta, Bando, Jefferson, MDL, Westinghouse, ACME, Schneider, GE ,Basle,Siemens and so on.
Moreover,for transformer accessories we still own transformer bushings,transformer calculator,transformer core,transformer oil,electrical transformer oil,transformer bobbin,transformer winding,transformer breather,transformer wire,transformers
electrical machines,power transformer core,power transformer parts.All of the products are of great quality.