Log In
Forums > Engine > Electricity: A simple, untapped, single-phase 480/120 VAC step-down control transformer is ...
Question #593
Link to Question
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
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
1 / 1