Compressed air for rapidly cooling motors?

[Nuttyman54]

Originally Posted by Al Skierkiewicz

Ian, There isn't enough metal to hold the cold long enough to be effective. It likely will reach ambient before being placed on the field. The bimetal is the silver part in the picture. It is roughly .020 to .040 thick. The terminals connect to the left and right side of the bimetal. The terminals are connected to the #6 on both sides which will transfer temperatures and draw the parts close to ambient. The handle parts are removed in this drawing. Even spraying directly into the handle opening is unlikely to take this part down below ambient all things considered. The base is Bakelite.

Al - my understanding was that the practice of cooling of breakers WAS to get them back to ambient, as opposed to potentially starting the match at higher than ambient temperatures and thus biasing the breaker to trip earlier than may be warranted.