Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up.
Sign up to join this community
I have a power transformer that I am trying to figure out if it works or not. It has the following listed on the input side
1 |
2 |
3 |
4 |
5 | 240v
6 | 230v
7 | 220v
8 | 210v
9 | 0v
10 |
11 |
12 |
I am in the UK and use 240 mains, I have a mains cable with an inline fuse. How should I wire the input up?
As winny commented,
Connect blue (neutral) to the "0v" connection.
Connect brown (line/live/hot) to the "240v" connection.
Your nominal 240V supply is actually now a nominal 230V +10%/-5%. So your local electrical utility can supply you with any voltage between 218.5V and 253V.
Last time I measured mine it was 237V but it varies a bit from day to day. The "240v" connection is a good one to choose if you are unsure.
It would be prudent to reduce the size of your fuse to the lowest value needed to support the load (load current * load voltage / supply voltage)
