A crossbar assembly and a trip assembly comprising same are disclosed. The crossbar assembly according to an embodiment of the present disclosure comprises a crossbar and an instant bar. The crossbar and the instant bar can be rotatably coupled so as to be rotatable around the same rotary shaft. Therefore, the space required for rotation can be reduced to be less than when the crossbar and the instant bar are individually rotated. In addition, the crossbar can move in a longitudinal direction when coupled to the instant bar. Therefore, a metallic bar for movement of the crossbar is unnecessary. Therefore, interference between different-phase currents flowing through the trip assembly can be minimized.

A trip device is disclosed. The trip device according to an embodiment of the present disclosure comprises an adjustment crossbar. The adjustment crossbar is in contact with or is spaced apart from a shooter and can open or close a breaker having the trip device. The adjustment crossbar is formed by coupling a fixed crossbar and a movable crossbar. The movable crossbar is slidably coupled to the fixed crossbar. The shooter is in contact with the fixed crossbar. Therefore, regardless of the movement of the movable crossbar, the contact between the shooter and the fixed crossbar can be maintained.

An adjustable trip assembly is for an electrical switching apparatus. The electrical switching apparatus includes a housing, separable contacts and an operating mechanism for opening and closing the separable contacts. The adjustable trip assembly includes a load conductor, a magnetic assembly comprising a magnetic member and an armature movably coupled to the magnetic member, and a calibration assembly comprising a calibration bracket cooperating with the armature, and an adjustment mechanism being adjustable to move the calibration bracket and thereby adjust the position of the armature with respect to the magnetic member to calibrate the magnetic assembly. The magnetic assembly further includes a biasing element that biases the armature away from the magnetic member.

An adjustable trip assembly is for an electrical switching apparatus. The electrical switching apparatus includes a housing, separable contacts and an operating mechanism for opening and closing the separable contacts. The adjustable trip assembly includes a load conductor, a magnetic assembly comprising a magnetic member and an armature movably coupled to the magnetic member, and a calibration assembly comprising a calibration bracket cooperating with the armature, and an adjustment mechanism being adjustable to move the calibration bracket and thereby adjust the position of the armature with respect to the magnetic member to calibrate the magnetic assembly. The magnetic assembly further includes a biasing element that biases the armature away from the magnetic member.

A method for manufacturing a trip unit that connects to a circuit breaker. The method includes mounting an assembly formed by a shaft and a trip member in a first case, mounting a detecting member in a second case, and assembling the first case and the second case, a contact end cooperating mechanically with the trip member such that the trip member trips the circuit breaker in the assembled configuration of the trip unit when the corresponding detecting member detects an electric fault.

A circuit breaker including a trip unit having an internal support and a friction adjustment control system for knob control is provided. The internal support includes a first opening to receive a first rotary knob having one or more first smooth rings and a second opening to receive a second rotary knob having one or more second smooth rings. The trip unit includes a first knob control of the first rotary knob. The first knob control includes a first structural support, a first housing and a first spring installed in the first housing against the first structural support. The trip unit further includes a second knob control of the second rotary knob. The second knob control includes a second structural support, a second housing and a second spring installed in the second housing against the second structural support.