摘要:
An adjusting knob assembly (1) includes a knob member (3) having a knob (7) and an axially extending shaft (15). A support bracket (5) has an aperture (23) defined in part by a gapped ring section (25) formed by a pair confronting arcuate fingers (27). The shaft (15) and the aperture have complimentary, longitudinally extending, circumferentially distributed flat surfaces (17; 33, 35), which provide discrete angular positions for the shaft (15) when the complimentary flat surfaces (17; 33, 35) are in register. Preferably, the gap (29) between the confronting fingers (27) is sized, and the arcuate fingers (27) have a compliance sufficient that the shaft (15) may be passed laterally through the gap (29) and snapped into the aperture (23). Any one of a plurality of interchangeable cam members (43) can be press fit on to the end of the shaft (15).
摘要:
A molded plastic current limiting circuit breaker (10) includes an interrupter assembly that includes an over-molded magnet (34), arc stack (36), baffle stack (38), and a chamber liner (40) in which a trip unit (80) is described.
摘要:
A circuit interrupter (3) responsive to abnormal currents in conductors of an electrical distribution system characterized by a circuit breaker mechanism (7) for opening and closing separable contacts (21, 27) and which mechanism comprises a releasable member operable between latched and unlatched positions, trip means comprising a bimetal element (101) and a trip bar (83) movable to unlatch the circuit breaker mechanism and biased in the latched position, the trip bar having a surface facing and spaced from the bimetal element which surface is slanted at an oblique angle to the longitudinal axis of the trip bar, and manually adjustable knob (177) connected to the trip bar for sliding the trip bar longitudinally to vary the space between the bimetal element and the trip bar surface in accordance with a desired thermal rating.
摘要:
Die Erfindung befaßt sich mit einer Einstellvorrichtung für Auslöser elektrischer Schaltgeräte mit einem äußeren und einem inneren Einstellorgan. Das innere Einstellorgan (40) trägt einen radial abstehenden federnden Rastarm (43), der mit ortsfesten Rastnuten zusammenwirkt. Zur Verbindung mit dem äußeren Einstellorgan (60) ist eine unterbrochene Ringschnappverbindung (46, 51, 64, 65) vorgesehen, die so ausgebildet ist, daß sowohl exzentrische Kräfte als auch von dem federnden Rastarm hervorgerufene unsymmetrische Spreizkräfte und ein Drehmoment übertragen werden können. Hierzu dienen zwei in der Längsachse (56) des Rastarmes (43) hintereinanderliegende größere Zapfen (64) mit einer etwa rechtwinkligen Hinterschneidung und zwei zwischen diesen Zapfen angeordnete kleinere, mit radialen Vorsprüngen versehene Zapfen (65). Diese Vorsprünge besitzen Flanken (73, 74), die in parallel zur Längsachse (54) der Einstellvorrichtung verlaufenden Ebenen (55) liegen. Die Einstellorgane sind im Spritzgußverfahren aus Kunststoff als komplette Teile hergestellt.
摘要:
The present invention discloses a thermal adjustable tripping device for a miniature circuit breaker, which is mounted in a base (101) of the miniature circuit breaker. The thermal adjustable tripping device comprises: a tripping mechanism (106), a thermal deformation element (107) and an adjusting mechanism (102). The tripping mechanism is provided with an extending tripping rod (161). The thermal deformation element is arranged close to the tripping rod and a gap is reserved between the thermal deformation element and the tripping rod. The adjustment mechanism adjusts a distance of the gap between the tripping rod and the thermal deformation element. A current in a loop accessed by the miniature circuit breaker enables the thermal deformation element to generate heat and deform, and the deformed thermal deformation element moves towards the tripping rod, contacts with the tripping rod and pushes the tripping rod to trigger the tripping mechanism to trip. The adjusting mechanism adjusts the distance between the thermal deformation element and the tripping rod so as to adjust a setting current in the loop. The present invention uses a rigid element to adjust a distance between a thermal deformation element and a tripping rod, which can ensure that the distance between the thermal deformation element and the tripping rod is constant in each operation. The tripping device of the present invention is applicable to an electric motor.
摘要:
A molded case circuit breaker includes a case configured to accommodate an element for trip, an upper cover 200 detachable attached to the case, a dial 100 configured to include a fixing plate 110, which is provided to protrude along an outer circumference surface thereof, and a first stopper 120 disposed under the fixing plate 110, a crossbar moved by the dial 100, a first dial fitting hole 210 provided in the upper cover 200 for the dial 100 to be fitted into the first dial fitting hole 210, and a dial rotation adjusting unit 220 provided in the first dial fitting hole 210 and fitted between the fixing plate 110 and the first stopper 120 to guide a rotation of the dial 100, the dial rotation adjusting unit 220 including a plurality of fitting grooves 223 arranged at certain intervals. The first stopper 120 is fitted into and fixed to the plurality of fitting grooves 223 according to the rotation of the dial 100.
摘要:
A circuit breaker of this application includes a fixable contact, a movable contact, a switchgear unit, a handle, a trip unit and an arc chamber unit, the circuit breaker being connected with a main circuit to cause a current to flow and the trip unit includes a fixed magnet being fixed on the main circuit, the fixed magnet configured to generate an electromagnetic force when the main circuit generates an abnormal current; an armature configured to be in contact with the fixed magnet in a rotation, one side thereof being spaced apart from the fixed magnet with a fixed interval and another side thereof forming a stepped slope; and an instant bar being in contact with the stepped slope of the armature, the instant bar performing a left and right rectilinear motion for adjusting the interval between the fixed magnet and the armature to rotate the armature. Therefore, this application has an effect where with an armature having a stepped slope with an inclination angle and an instant bar performing a left and right rectilinear motion to rotate the armature, an interval between a fixed magnet and an armature is adjusted and an abnormal current value triggering a trip is set.