Forums > Engine > Electricity: A simple, untapped, single-phase 480/120 VAC step-down control transformer is ...
| Question #593 | |
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| A simple, untapped, single-phase 480/120 VAC step-down control transformer is rated at 600VA at 60 Hz. Neglecting power factor, what is the rated secondary load current? | |
| A) 1.25 amperes | |
| B) 4 amperes | |
| C) 5 amperes | |
| D) 10 amperes | |
| Posted: 12 Jun 2019 10:31 UTC | Post #1 |
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| nberner Engine |
Member Total Posts: 1 |
| Is there a formula for this? | |
| Posted: 17 Aug 2019 10:51 UTC | Post #2 |
| ChrisAK Engine |
Member Total Posts: 1 |
| P = IV, solve for I initial (600/480) = 1.25A 480/120 VAC --> 4 to 1 step down transformer --> 1.25A *4 = 5A |
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