@SteveH posted:The P&B is also heat dependent, where the Airpax isn't.
Hum! A tangential question: Are automotive self-resetting breakers, such as used to upgrade the internal breakers in ZW transformers, heat dependent as well? If so, that may explain a problem I've had in the past where a ZW has been running for a few hours and then the upgraded breaker pops with no provocation...
Mitch