Power Supplies like the MRC 1400, and the small power supplies that come with Bachmann Large scale sets and many others have the thermal circuit breaker noted above.
In your case it would seem that the Annie is heating the breaker tripping it. Then it resets when the overload is removed. Then repeats. the more you try to use it the worse it gets because it cools down just enough to reset but is still warm enough to over heat more quickly and trips faster. As the breaker gets tripped more and more the weaker it gets. I can't remember when the MRC 1400 first came out but is pretty old and may have been used a lot before you tried using it with the Annie.
My recommendation is to get a power supply rated at 2 Amps or more, and preferably new or hardly used. If you plan to use trains longer than 4 cars and the layout has grades your MRC 1400 is too weak for sure.
Christmas Cheers and Beers!
Loco Bill
In your case it would seem that the Annie is heating the breaker tripping it. Then it resets when the overload is removed. Then repeats. the more you try to use it the worse it gets because it cools down just enough to reset but is still warm enough to over heat more quickly and trips faster. As the breaker gets tripped more and more the weaker it gets. I can't remember when the MRC 1400 first came out but is pretty old and may have been used a lot before you tried using it with the Annie.
My recommendation is to get a power supply rated at 2 Amps or more, and preferably new or hardly used. If you plan to use trains longer than 4 cars and the layout has grades your MRC 1400 is too weak for sure.
Christmas Cheers and Beers!
Loco Bill