I connected my 15VAC power supply to a small audio output transformer (part of a kit), and whoops! blew a fuse. The secondary of the transformer was disconnected (ie, an open circuit).
I'm very confused as to why the fuse blew. My understanding is that very little current can flow in a primary if the secondary isn't connected to a load. If that's true, why did my fuse blow? If it's not true, how does any power transformer work? Does it make a difference that the transformer was intended for audio, not power, use? Why?
(For completeness: I also had a volt meter hooked up to the primary. And I may have thought the primary leads were secondary and vice versa.)
I'm very confused as to why the fuse blew. My understanding is that very little current can flow in a primary if the secondary isn't connected to a load. If that's true, why did my fuse blow? If it's not true, how does any power transformer work? Does it make a difference that the transformer was intended for audio, not power, use? Why?
(For completeness: I also had a volt meter hooked up to the primary. And I may have thought the primary leads were secondary and vice versa.)