I'm currently using a circuit breaker for low voltage (6V) but high current (60A) electrochemistry projects. My bridge rectifier is rated at 60A max. I'm aware that circuit breakers work in counter intuitive ways (they don't trip at exactly their rated amperage and instead are the Thermal - Magnetic type) and have read the NEC regarding their use and have the trip curve for my breaker.
In my applications, the amperage never exceeds 40A due to the resistance of the solution. The real problems are with:
The current circuit breaker I've selected is designed to trip immediately at over 50A (Thus saving the bridge in the event of a short of the electrodes), but trips intermittently during use due to its low rating.
I've been playing around with an idea, but I'm not sure if it will fry the bridge or not. In the trip curve it says that the breaker will trip in half a cycle or so above a certain amperage (lets say 200A) due to the magnetic force generated. If I have a circuit breaker rated at 50A and the transformer will put out 300A on a dead short will this protect the bridge if the solution's resistance prohibits such currents from flowing typically, aside for a short of the transformer secondary?
EDIT 0: The transformer secondary is connected to the breaker in series (before) the bridge (for clarity, the bridge is a full bridge rectifier with the typical 2 AC input, DC+ and DC- output model), then the DC current is used for electrochemistry and passed thorough a solution and back into the bridge and into the transformer secondary.