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Buck-boost transformers should not be used to create a 120/240-volt single-phase service fed by a 208Y/120-volt 3-phase, 4-wire source.

a. true
b. false

Answer :

Final answer:

It is true that buck-boost transformers should not be used to create a 120/240-volt single-phase service from a 208Y/120-volt source, as they are not capable of large voltage adjustments needed for such an application, and could lead to problems or safety issues.

Explanation:

The statement that buck-boost transformers should not be used to create a 120/240-volt single-phase service from a 208Y/120-volt 3-phase, 4-wire source is true. Buck-boost transformers are used to correct minor voltage issues, meaning they can adjust the voltage by a small percentage. However, to step up a 208-volt 3-phase source to a 240-volt single-phase service, a different type of transformer is needed, typically a step-up transformer. Using a buck-boost transformer in this context could lead to equipment malfunction or safety hazards, as it is not designed for such a significant change in voltage. Moreover, appliances require sinusoidal AC to operate correctly, which may not be guaranteed using improper transformation techniques.

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