Power & Voltage Ratings to 10 KVA, 240 V

The decision to use toroidal vs. laminated transformers is typically driven by the following considerations:
Lower Off-load Power Consumption
Lower off-load power consumption leads to long term cost savings due to increased electrical efficiency. The efficiency or losses at each point in the whole system determines the overall system operating cost. Each point of conversion has losses. Minimizing these losses lowers the cost of product and provides long term cost savings to your customer. (Fig. 1)
Smaller and Lighter
High packing density and related advantages lead to reduced design costs. A physically smaller transformer is less expensive to manufacture, and will also reduce your overall system cost by allowing for smaller packaging (Fig. 2)
A smaller transformer also means lighter weight, which will save you costs by reducing the structural chassis design, and improving portability. (Fig. 3)
Wider Choice of Configuration
Selecting a transformer core designed from a single strip of steel will save cost by providing you the option of an infinite variety of configurations. This advantage leads to custom transformer dimensions to meet almost any product or system parameter.
Low Radiated EMI
Selecting a transformer exhibiting low radiated EMI will save costs by significantly
reducing interference and shielding between the transformer and sensitive electronic components. (Fig. 4)
Virtually No Audible Noise
Selecting a transformer inherently void of low frequency audible noise will save costs by simplifying installation and improving the quality of the product.
Safety Recognition
Installation of a safety agency's listed or recognized transformer, or certification of compliance, can help save costs incurred in the regulatory approval process. Typical safety agency approvals and standards applied to Bicron transformer products include UL, CSA, VDE, TUV, and IEC.

The graphs below show four of the most important toroidal advantages of typical power or isolation transformer designs plotted against nominal power ratings.

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