NEMA circuit breakers have an overcenter, trip-free toggle mechanism with quick-make, quick-break action and positive handle indication. The tripping mechanisms in two-and three-pole circuit breakers operate such that an overcurrent on any pole of the circuit breaker will cause all poles of the circuit breaker to open simultaneously. Each pole has an individual thermal-magnetic trip element calibrated for 40°C ambient temperature.

ZOYEA NEMA Breaker Technical Data :
Pole No. 1,2,3
Rated voltage(V) AC 120/240
Rated current (A) 10,15,20,25,30,40,50
Characteristic C
Rated frequency 50/60Hz
Rated breaking capacity (Icn) 6kA /10kA
Operation capacity of short circuit (Ics) 6kA /7.5kA