摘要:
A circuit breaker includes a housing, wiring boards and terminals disposed within the housing, wherein the terminal comprises a screw, a press board and a wire trap provided with a incoming line hole and a wiring space; the screw passes through a threaded hole on the top end face of the wire trap to contact the press board which is able to lift up and down and is embedded in the wire trap; the wiring board traverses the wire trap, and divides the wiring space of the wire trap into two independent wiring spaces; a first line hole is provided on the housing at a position above the screw of the terminal; and the press board and the wire trap perform a relative displacement with the wiring board under the action of the screw, to compress the two independent wiring spaces so as to realize the connection between wires. In the circuit breaker, with the wiring board as a boundary, the wiring space of the wire trap is divided into two independent wiring spaces, realizing a hybrid junction of commonly used wires while realizing the hybrid junction wiring function of single-strand wires with different diameter.
摘要:
A current transformer supplying a power for an electronic controller comprises two independent core magnetic circuits, wherein a first core magnetic circuit is a closed loop formed by connecting a U-shaped core and a linear core, a primary conductor extends through the closed loop, and a secondary winding for power supply is wound on the linear core; a second core magnetic circuit having an opening shape is disposed in parallel to the linear core of the first core magnetic circuit, and the open end of the second core magnetic circuit is coupled to the first core magnetic circuit through air gaps. The area of the cross section of the linear core is less than that of the cross section of the U-shaped core, so that the linear core can be magnetically saturated earlier than the U-shaped core. The centerline length of the U-shaped core is 1.5 to 4 times of that of the linear core. The current transformer of the present invention can not only normally start and work in case that a primary current is far lower than a rated current In, but also achieve the purpose of inhibiting rapid increase of an output current of the secondary windings and smoothing the output current in case that the primary current is far more than the rated current In.
摘要:
A circuit breaker includes a housing, wiring boards and terminals disposed within the housing, wherein the terminal comprises a screw, a press board and a wire trap provided with a incoming line hole and a wiring space; the screw passes through a threaded hole on the top end face of the wire trap to contact the press board which is able to lift up and down and is embedded in the wire trap; the wiring board traverses the wire trap, and divides the wiring space of the wire trap into two independent wiring spaces; a first line hole is provided on the housing at a position above the screw of the terminal; and the press board and the wire trap perform a relative displacement with the wiring board under the action of the screw, to compress the two independent wiring spaces so as to realize the connection between wires. In the circuit breaker, with the wiring board as a boundary, the wiring space of the wire trap is divided into two independent wiring spaces, realizing a hybrid junction of commonly used wires while realizing the hybrid junction wiring function of single-strand wires with different diameter.
摘要:
Disclosed is a fuse appliance, which comprises a fuse carrier for carrying a fuse and a fuse appliance base. The fuse carrier is arranged, in a manually operable way, in a hollow cavity of the fuse appliance base that is formed by buckling and assembling a shell bottom and a shell cover, so as to remove or insert the fuse. Arranged on the two sides of the fuse appliance base are fixed contacts which come into contact with moving contacts arranged on the fuse carrier, and wiring terminals for electrically connecting the two contacts of the fuse appliance with a main circuit respectively. The fuse appliance further comprises a rotational-linear pulling type operation mechanism formed by a semicircular rotary shaft structure, the semicircular rotary shaft structure comprises two semicircular convex shafts and first and second circular straight grooves that are in mounting fit with each other, so that during the closing operation stage of the fuse appliance, the fuse carrier can perform rotational movement in relation to the fuse appliance base only and cannot perform linear movement; during the opening operation stage of the fuse appliance, the fuse carrier accomplishes an interchange between rotational movement and linear movement at a transition position where the fuse carrier is pulled out of or pushed into the fuse appliance; and during the pull-out or push-in operation stage of the fuse appliance, the fuse carrier can perform linear movement only.
摘要:
The present invention discloses a multi-pole circuit breaker with auxiliary supports, which comprises a base, a plurality of single-pole circuit breaking units, an operating mechanism and a rotation axis assembly, wherein the rotation axis assembly consists of a plurality of supporting assemblies and a plurality of support shaft parts in series; each of the support shaft parts is provided with a movable contact bridge; each of the supporting assembly consists of a rotation axis, an auxiliary support, an auxiliary support bearing and at least one supporting rod; the rotation axis maintains synchronous revolution with the support shaft parts; the outside of the bearing is tightly assembled with a bearing hole of the auxiliary support, while the inside is tightly assembled with the rotation axis; the supporting rod is tightly assembled with a supporting rod installing hole on the auxiliary support; the operating mechanism is fixedly connected with the supporting rod; and the supporting rod is fixedly installed on a housing of the single-pole circuit breaking unit and provides stable supporting force for the rotation axis through the auxiliary supports. The multi-pole circuit breaker has balanced contact pressure at each contact point, flexible operation, fast breaking, good breaking synchronism of contacts at all poles and long service life.