SU1410132A1 - Automatic circuit-breaker - Google Patents

Abstract

The invention relates to electrical engineering and can be used in circuit breakers designed to protect electrical circuits against overcurrent and short circuit current. The purpose of the invention is to improve manufacturability. reduction of labor intensity izgotovl1P1, reducing size and weight. The switch contains a pull of 5, pivotally connected at one end to the actuator button 2, and the other to the pawl 7 of the mechanical tripping. This mechanism also consists of a lever of T-shaped form 18, two strips 8, two arcuate earrings 16. The force springs 15 cover the middle parts of the axis 17, located in the groove of the T-type lever 18 The ends of the springs 15 are spaced out in the grooves a and b of the casing 1. The lever 18 in step C is pivotally connected to the rocking chair 19. which acts on the moving contact. All elements of the switch are made flat. .3 il.

Description

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The invention relates to electrical engineering and | can be used to protect electrical circuits and electrical consumers

all energy from short currents

mMkani and overload currents.

j The purpose of the invention is to increase the technological level, reduce the labor intensity of manufacturing, reduce the size and weight.

FIG. 1 shows the automatic switch in the “on” position; in fig. 2 - the same, in the “Off” position (in Fig. 3 a and b) two projections of the free tripping mechanism are shown.

The circuit breaker contains a housing I, in the mouth of which a drive-button 2 is installed, having a recess for the disk 3, creating the background for the plate 4 denoting the rated current of the switch. The box 2 is connected to the bar 5 by protrusions spaced apart in height and facing in opposite directions. The button 2 is through 5, the axis 6 is pivotally connected to the pawl 7 and the pads 8. The pawl 7 is flat, has a groove for the pivot 6. The one end of the pawl with the axis 9 is hinged to the body, and the other end to the pawl 7 rests on the compensator-latch- 10. The strips 8 are flat and pressed on the axes 6 and 11. The compensator-latch 10 is mounted hingedly in the mirrored depressions K of the housing 1 and the cover 12 and under the influence of the antenna M of the spring 13 is held in engagement with the pawl 7. On compensator-latch 10 for-k) heat-insulator 14. The spring 13 has antennae M and L, installed in the groove a and pressed against the body edge by power springs 15. L barb is supported on the protrusion of the D button. The power springs 15 are made flat (P1) of the carbon shape and are installed in the grooves a1 and b of the casing 1. The earrings 16 are made flat in shape with openings on the (|) nts. They are pressed onto axis 17, and are pivotally connected with axis 11. The lever 18 B1 | .1 is filled with a flat T-H-shape and is installed between the bar and the earring, the otorHyTbiM protrusion B is movably connected to the rocking chair 19, which is hinged to the body with the help of octH 9. The contact of the 20th mrstikovy type is movably fixed on the pan 19 and is pressed against its protrusion by the spring 21. The Trombimetal 22 and the 23 are connected by a cable KifiM 24. The lid 12 is fastened with wire locks 25 placed in the recesses of the case and the lid.

To turn off the automatic switch, you need to turn the button 2 (you - TsiiHyTb) to the "Off" position. At the same time, Tijira 5 lifts the axis 6, P (() turned the plank 8 about the axis 11 n |) clockwise, axis 1 moves the axis of the dog 7 to the left in the groove of the lever 18, through C (fyi 16 carries axis 17, which also moves in the groove of the lever 18. With

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five

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This increases the deflection of the power springs 15.

When axis 6 reaches a position above an imaginary straight line passing through axes 6, 11, and 17, a torque appears (the force of the force springs acting along the straight connecting axis 11 and 17 multiplied by the value of the perpendicular, omitted from the center of the axis 6 to the line connecting the axes 11 and 17), acting counterclockwise.

Under the influence of this moment, the strips 8, the earrings 16 and the lever 18 rotate counterclockwise with respect to the point z regardless of the speed of movement of the button, i.e. instantly. The lever 18 protrusion B rotates the rocker 19 on the axis 9 in a clockwise direction. Rocking, bearing contact 20, opens the fixed contacts.

The operation of the circuit breaker in the circuit of the circuit of the electric circuit when you press the button occurs in reverse order.

When current overloads or short-circuit currents occur in the network, the circuit is automatically disconnected using a thermo-bimetal release 22. Under the influence of overload currents or short-circuit currents, the thermo-bimetal 22 heats up and bends clockwise, turns the compensator latch 10 through insulator 14, turns it out meshed with the pawl 7. The pawl 7, deprived of support, under the action of the power springs 15 through the loops 16 and the bar 8 rotates clockwise relative to the axis 9.

Axis 6 rises along the slot of the pawl, turning the strips 8. At the same time, axes 1 1 and 17 move along the grooves of the lever 18 to the right until they stop, after which the lever 18 under the action of the power springs 15 instantly turns counterclockwise relative to the point g. In turns the rocking chair 19 on the axis 9 in a clockwise direction. Rocking 19, the carrier contact 20, opens the electrical circuit.

Simultaneously with the process of opening the electric circuit, the button 2 under the influence of the antennae L of the spring 13 rises to the "Disabled, dragging 5 and the axis 6" position. The axis 6, raising the slot of the pawl 7, rotates it about the axis 9 counterclockwise.

The circuit breaker has a smaller number of simple in construction and manufacturing of parts and assembly units (1.4 times smaller in size, 2.1 times in mass) and the consumption of materials for its manufacture has been reduced by 2 times.

Claims (1)

Invention Formula five 0 five 0 55 A circuit breaker comprising a housing, a cover, a contact system, a drive coupled to a free-release mechanism acting on movable contacts, a latch compensator, which interacts with the free decoupling mechanism, and a rocking chair associated with a movable contact, characterized in that, in order to improve manufacturability, reduce labor intensity, reduced dimensions and weight, the ha hectares are flat on one its end connected to the drive, two protruding protrusions are shifted along the length, facing in opposite directions and forming a hinge connection with the drive; the other end of the rod is hingedly connected to the free release mechanism, which made in the form of a flat lever-shaped form with grooves at the ends and an unbent protrusion at the middle part, two flat planks with openings at the ends, two flat earrings of an arcuate shape with openings at the ends, a flat dog with an elongated groove. one end of which is hinged to the housing and two flat power springs, the ends of which are placed in the housing grooves, the rocking chair is made flat T-shaped, one end of its crossbar is hinged to the housing, and the other is hingedly connected to a bent overhang of the y-shaped lever, at the same time, the ha, doggie, IT-L-shaped arms are located between the earrings, one ends of which are pressed onto the axis located in the bosom-shaped lever, and are covered by flat force springs, while the other ends are jointly connected to the axis , located oh in another groove of T-T - shaped lever, on the same one end are pressed flat strips axis, the other ends of which are pressed onto the axle, located in the elongated slot of the pawl and providing a hinge coupling rod and the pawl. 5 / J cpue.Z n 7 at eight G6 . to cpue.Z