Circuit Protection, Interrupt Ability, and ABYC

[hellosailor]

Thermal magnetic??

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?

[GordMay]

Originally Posted by hellosailor

Thermal magnetic??

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.

[GordMay]

See the second page (11-52) below, for a description of the Hydraulic-Magnetic Circuit Breaker:

➥ http://geeco.org/specs/heinemann/hymag.pdf