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Frequently Asked Questions

This section is for informational purposes only and should not be used as a design tool or to generate technical specifications. For further details, please contact CTI and discuss with a representative for clarification. Search for terms or questions by entering words or phrases in the text box and clicking Search, by selecting a category from the drop-down list and clicking Show. Then simply click on the linked term or question below.

Question: Transformer with 4 windings

Answer: A 4-winding transformer is the same as a 2-winding transformer except that generally the primary and secondary are split up into two sections usually suited for series parallel connection. An example would be a transformer with a primary of 240/480 volts and a secondary of 120/240 volts. The voltages indicated are such that the primary can be connected in series for a 480-volt supply or paralleled for a 240-volt supply. The secondary can be in series for 240 volts or paralleled for 120 volts, or connected in series with the mid tap brought out for 120/240 volts, 3 wire operation. This is the most common connection and is found on industrial lighting panels as well as in most residences.

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Park Ohio Holdings
Control Transformer, Inc., 3701 Warren Meadville Road, Cortland, OH 44410
Phone (330) 637-6015, Fax (330) 637-2180
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