I assume you are talking about an electrical kitchen unit in a camper or trailer unit since you identify it as a Hotpoint (TM). Granted, it is my assumption, but I think it is valid.
From what you have said, I have to assume, also, that you are dealing with AC voltage not DC and it is standard 117 VAC.
Here are a couple of thoughts that I think are valid. First, look at the plug fiture itself. If it his a three-wire unit and has a reset button in the middle, I assume it is a ground-fault-isolater unit. GFI (ground fault isolator) units trip out, cutting the power flow. They are a safety feature (for further vehicle safety information, please visit Safecar infoCar safety Insurance Magazine
) in motorhomes, campers and trailers where it is possible for water to spill while you are using things like electrical kitchen equipment, posing a danger. GFI circuits cut out instantly a problem is found, ending the danger.
It is possible that the GFI plug, itself, is faulty and shorting out, causing the problem you note.
It is equally possible that the Hotpoint (TM) device itself is faulty and shorting out. It could easily cause circuit breakers to trip, cutting power, in this situation. This, it seems to me, is the problem you are describing. If you have any further information, please let me know here by placing a comment below.