A kind of miniature circuit breaker with earth leakage protective device
Technical field
The present invention relates to a kind of miniature circuit breaker, belong to a kind of miniature circuit breaker with earth leakage protective device.
Background technology
Miniature circuit breaker is meant and exchanges the low-voltage circuit breaker that uses on 50/60Hz rated voltage 230/400V, the following circuit of rated current 63A, is usually used in places such as industry, commerce, high level and residential houses.Miniature circuit breaker commonly used has overload and short-circuit protection function and does not have creepage protection function; because the space in the miniature circuit breaker housing is less; be difficult to reach the use standard as in housing, adding earth leakage protective functional unit; described functional unit is meant zero-sequence transformer, signal amplifying circuit board, coil, iron core etc., and it is not enough and cause the short circuit phenomenon of not threading off tripping force to occur through regular meeting.Chinese patent ZL99206121.0 discloses the two-wire circuit breaker that a kind of width is 18mm; this patent has been added an electric leakage dropout driver in housing; the one side lengthening of housing; enlarged shell space; in the space of expanding, lay the coil of electric leakage dropout driver, increased creepage protection function.Though this patent has solved the space requirement of common miniature circuit breaker; but its housing is an overall structure, and earth leakage protective functional unit can not be pulled down, when the occasion that does not need short-circuit protection and other common miniature circuit breakers are used; seeming, volume is huge a bit, is not easy to install.
Summary of the invention
In order to overcome disadvantages of background technology, the invention provides a kind of miniature circuit breaker with earth leakage protective device, the miniature circuit breaker of this band earth leakage protective device has mainly solved the problem that the miniature circuit breaker of existing band creepage protection function can not split.
Technical scheme of the present invention is: a kind of miniature circuit breaker with earth leakage protective device comprises Shell of circuit breaker, Shell of circuit breaker is made up of circuit breaker shell block and circuit breaker cover plate, tripping, snap close and short circuit driver are installed in the circuit breaker shell block, described short circuit driver comprises coil and bobbin, be provided with the copper sheathing of band central through hole in the bobbin, be used to be installed with steel wire in the described copper sheathing, one end of described steel wire is corresponding with snap close, the other end of steel wire links to each other with free movable binding post cover plate, and the Shell of circuit breaker of binding post cover plate correspondence is provided with through hole; Described Shell of circuit breaker clamping earth leakage protective device housing; zero-sequence transformer, electric leakage driver and control circuit board are installed in the described earth leakage protective device housing; be used to be installed with butt joint lead and loop electric-conductor in the zero-sequence transformer; butt joint lead and loop electric-conductor are electrically connected with 2 output end binding posts respectively; it is outer and corresponding with the circuit breaker lead-out terminal that the other end of butt joint lead stretches out the earth leakage protective device housing, and the iron core in the electric leakage driver is corresponding with the binding post cover plate.
Described circuit breaker shell block is provided with to be installed card and copper spare is installed, and the earth leakage protective device housing is provided with and can be installed with the Chang'an that card docking is installed.
Described earth leakage protective device housing is made up of earth leakage protective device base and earth leakage protective device cover plate, earth leakage protective device base and the clamping mutually of circuit breaker shell block.
On the described earth leakage protective device base junction block is installed, described junction block is provided with the input of 2 output end binding posts and loop electric-conductor.
The invention has the beneficial effects as follows: owing to take such scheme; when needing electric leakage to protect; the earth leakage protective device housing is docked with Shell of circuit breaker; the butt joint lead inserts the output of circuit breaker; 2 output end binding posts in the earth leakage protective device housing insert electrical equipment; electromagnetic vector during electric leakage in the zero-sequence transformer and be not equal to zero; zero-sequence transformer produces induced current and transmits signal to the electric leakage driver through the control circuit board amplification; the iron core action; promote binding post cover plate drive steel wire and make the snap close action; circuit breaker tripping is realized earth leakage protective.When not needing earth leakage protective, earth leakage protective device housing and interior assembly thereof are pulled down, can be used as common miniature circuit breaker and use, flexible, functional diversities.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention.
Accompanying drawing 2 is contour structures schematic diagrames of the present invention.
Accompanying drawing 3 is structural representations of short circuit driver 5 among Fig. 1.
1-circuit breaker shell block among the figure, 2-circuit breaker cover plate, 3-tripping, 4-snap close; 5-short circuit driver, 6-coil, 7-bobbin, 8-copper sheathing; the 9-steel wire, 10-binding post cover plate, 11-zero-sequence transformer, the 12-driver that leaks electricity; the 13-control circuit board, 14-docks lead, 15-loop electric-conductor, 16-output end binding post; 17-circuit breaker lead-out terminal, the 18-iron core, 19-installs card, and 20-installs copper spare; 21-Chang'an is installed, 22-earth leakage protective device base, 23-earth leakage protective device cover plate, 24-junction block.
Embodiment
The invention will be further described below in conjunction with accompanying drawing:
By Fig. 1 in conjunction with Fig. 2, shown in Figure 3, a kind of miniature circuit breaker with earth leakage protective device comprises Shell of circuit breaker, Shell of circuit breaker is made up of circuit breaker shell block 1 and circuit breaker cover plate 2, tripping 3 is installed in the circuit breaker shell block 1, snap close 4 and short circuit driver 5, described short circuit driver 5 comprises coil 6 and bobbin 7, be provided with the copper sheathing 8 of band central through hole in the bobbin 7, be used to be installed with steel wire 9 in the described copper sheathing 8, one end of described steel wire 9 is corresponding with snap close 4, the other end of steel wire 9 links to each other with free movable binding post cover plate 10, and the Shell of circuit breaker of binding post cover plate 10 correspondences is provided with through hole; Described Shell of circuit breaker clamping earth leakage protective device housing; zero-sequence transformer 11, electric leakage driver 12 and control circuit board 13 are installed in the described earth leakage protective device housing; be used to be installed with butt joint lead 14 and loop electric-conductor 15 in the zero-sequence transformer 11; butt joint lead 14 and loop electric-conductor 15 are electrically connected with 2 output end binding posts 16 respectively; it is outer and corresponding with circuit breaker lead-out terminal 17 that the other end of butt joint lead 14 stretches out the earth leakage protective device housing, and the iron core 18 in the electric leakage driver 12 is corresponding with binding post cover plate 10.When needing electric leakage to protect; the earth leakage protective device housing is docked with Shell of circuit breaker; butt joint lead 14 inserts circuit breaker lead-out terminal 17; 2 output end binding posts 16 in the earth leakage protective device housing insert electrical equipment; electromagnetic vector during electric leakage in the zero-sequence transformer 11 and be not equal to zero; zero-sequence transformer 11 generation induced currents are through control circuit board 13 amplifications and transmit signal to electric leakage driver 12; iron core 18 actions; promote binding post cover plate 10 drive steel wires 9 and make snap close 4 actions; circuit breaker tripping is realized earth leakage protective.When not needing earth leakage protective, earth leakage protective device housing and interior assembly thereof are pulled down, can be used as common miniature circuit breaker and use, flexible, functional diversities.
In conjunction with shown in Figure 2, described circuit breaker shell block 1 is provided with to be installed card 19 and copper spare 20 is installed by Fig. 1, and the earth leakage protective device housing is provided with and can be installed 21 with installation card 19 Chang'an of docking.After earth leakage protective device is installed, earth leakage protective device housing lengthening, the Chang'an of packing into is installed and is convenient to install after 21.
In conjunction with shown in Figure 2, described earth leakage protective device housing is made up of earth leakage protective device base 22 and earth leakage protective device cover plate 23 by Fig. 1, earth leakage protective device base 22 and circuit breaker shell block 1 clamping mutually.Simple in structure, easy installation and removal.
By shown in Figure 1, on the described earth leakage protective device base 22 junction block 24 is installed, described junction block 24 is provided with the input of 2 output end binding posts 16 and loop electric-conductor 15.The single-phase control of circuit breaker generally is used for normal domestic supply line, and the input of loop electric-conductor 15 is connected with zero line.