Application
In preparation for connecting power to the primary side of dual voltage single-phase transformers, it's necessary to first wire the two windings in either series or parallel to match the incoming voltage. An example of this is common transformers with a primary voltage description of 240 x 480. The windings are rated for the lower of the two voltages show on either side of the 'x'. Connecting the windings in series allows for the higher of the two voltages. Connecting the windings in parallel allows for the lower of the two voltages.
Example of Series and Parallel Connections
Example of a typical application
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OEM customer base source voltages in United States: 208, 240, or 480 volts (From past shipments 480 is 65% of the business, 208 is 20%, and 240 is 10%)
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5% of business goes into Canada and needs 600 volts; customer always knows when equipment goes to Canada.
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Load requirement is for a 500 VA transformer, load is 120 volt control
For this customer, Schneider Electric has the following solutions:
Solution 1
Three standard units with interchangeable dimensions
9070T500D1—240 x 480 to 120; handles 75% of business. For details, see Voltage and Connection Options.
9070T500D3—208 to 120; handles 20% of business. For details, see Voltage and Connection Options.
9070T500D5—600 to 120; handles 5% of business. For details, see Voltage and Connection Options.
Solution 2
Two MultiTap units with interchangeable dimensions
9070T500D20—208/230/460 to 115; handles 95% of business {US Voltage Code}. For details, see Voltage and Connection Options.
9070T500D32—230/460/575 to 95/115; handles 5% of business {North American Voltage Code}; covers 460 and 575 Canadian sources. For details, see .
Solution 3
One Universal Control Transformer
9070T500D50—240/416/480/600 to 99/120/130. For details, see Voltage and Connections Options.