Originally Posted by hellosailor
I thought it was "thermal" versus "magnetohydraulic" (aka magnetic). You're saying that the thermal breakers are ALSO "magnetic" and not simply thermal (i.e. bimetal) actions?
Residential & smaller industrial circuit breakers are generally Thermal-Magnetic type, utilizing a single
trip element combining both thermal and magnetic trip elements.
see ➥ Thermal-magnetic circuit breakers | Machine Design
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