QUICK TRIP BREAKER WITH FUNCTION OF PNEUMATIC ACTUATION TRIP

摘要

A quick trip breaker with the function of pneumatic actuation trip, which comprises a plurality of single-stage breaking units (36) and an operation mechanism (1) with a shared trip rod (17).Each of the single-stage breaking units comprises a shell (35), a contact device (45), an arc extinction device (25), a wiring device (55), an over-current trip device and a pneumatic trip device consisting of actuation mechanisms (2) and transmission mechanisms (3). One single-stage breaking unit is provided with one or two sets of transmission mechanisms in coupled connection with a piston (16) of the actuation mechanisms of the single-stage breaking unit, so the transmission mechanisms can be shared by two adjacent breaking units, and the trip action of the actuation mechanisms of the two adjacent breaking units can be transmitted to the shared trip rod of the operation mechanism through a contact arm (11). One single-stage breaking unit is provided with one or two sets of actuation mechanisms which can transmit the trip action of the stage breaking unit to the transmission mechanism on the connection side synchronously.