Direction of current through circuit breaker?
I use products such as car-Standard http://www.waytekwire.com/index.htm breakers. In the circuit breaker is a stamp placed on each side of the switch. BAT is the seal and AUX. My question is why it is important that dirction current flows through a Thermal circuit breaker? Rich Z, his explaination sounded great, so I decided to open one of the switches and take a peak. I was a little surprised and a little disapointed. The design is simply a very thin piece of what looks like a flat, bi-metal strip that is dimpled in two places to give it a little more center-snap when heated. The strip was nailed to a stud and through other states. No other components. Period.
DC circuit breakers often have additional features of them designed to quench an arc if there is a current important that they have a break. CA which have easier because the voltage across them is reduced to zero during a cycle (which is why it may fail when used for DC, which remains above). The use of CC needs to put in tips from other [as magnets or a capacitor that creates a reverse flow or a bypass transistor to lower the current after a delay] to suppress an arcing fault. Your switches should have a technical activity arc cooling is dependent on the polarity.
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