CN201490129U

CN201490129U - New tripping mechanism of grounding failure breaker

Info

Publication number: CN201490129U
Application number: CN2009201385275U
Authority: CN
Inventors: 蔡峰毅; 唐锡臣; 杜建俊
Original assignee: XIAMEN ZTC TECHNOLOGY Co Ltd
Current assignee: XIAMEN ZTC TECHNOLOGY Co Ltd
Priority date: 2009-05-27
Filing date: 2009-05-27
Publication date: 2010-05-26
Anticipated expiration: 2019-05-27

Abstract

The utility model discloses a tripping mechanism of a grounding failure breaker, belonging to the technical field of manufacture of mainly used for electric shock danger protection for household or similar purposes. The tripping mechanism is fixed on a base in a shell, a tripping plate can rotate with a certain angle under the actions of a reset key and a pull rod and can vertically move, an iron core and an iron core spring are arranged in a tripping coil, and a pole shoe and a pole plate are fixed outside the tripping coil. The pole plate is tightened at the opening of the U-shaped pole shoe, and the pole plate and the pole shoe form a closed four-side loop. In the utility model, the U-shaped pole shoe and the pole plate reduce the reluctance of the pole shoe and the iron core as much as possible. When the tripping coil is electrified, the magnetic field of the iron core form a closed magnetic circuit through the pole plate and the pole shoe, and the magnetic field in the closed magnetic circuit is relatively stronger. Under weak current, the tripping coil still has enough magnetic force to sucked on the pole plate after the magnetic force of the iron core overcomes the elasticity of the iron core spring, therefore, the tripping plate can hook the pull rod, and the contact electrifying state of a movable contact and a fixed contact can be maintained.

Description

The new tripping mechanism of ground-fault interrupter

Technical field

The utility model discloses a kind of tripping mechanism of ground-fault interrupter, belongs to the main residual current action breaker manufacturing technology field as the shock hazard protection of family expenses or similar applications.

Background technology

Ground-fault interrupter is made connection, disjunction and carrying rated operational current in circuit, disconnect protected circuit simultaneously when residual current surpasses residue operating current value or zero line earth fault takes place.Ground-fault interrupter is to utilize iron core (street iron) to drive the tripping mechanism action, thereby the connecting and disconnecting of realization circuit.The tripping mechanism of existing ground-fault interrupter generally adopts mode structures such as electromagnetic relay and compound dropout, and is all complicated.

Chinese patent literature CN201194208 discloses a kind of release that is used for stoppage circuit breaker; it comprises support; solenoid; embrace latch mechanism; armature; moving contact; fixed contact; contact supporting; one side of support is provided with reset button; testing button; reset button; be provided with back-moving spring between testing button and the support; the opposite side of support and reset button; the testing button correspondence is provided with embraces latch mechanism; one side of embracing latch mechanism is provided with contact supporting; contact supporting is provided with moving contact; fixed contact, a side of embracing latch mechanism is provided with solenoid, and a side of contact supporting is provided with armature; armature is provided with slide block; have the function of cut-out, have backing protection function simultaneously, this circuit breaker tripping architecture complexity greater than earth fault current; and action is unstable.

Summary of the invention

At the deficiency of existing circuit breaker technology, the utility model provides a kind of tripping mechanism of ground-fault interrupter of rational in infrastructure, reliable in action, has realized that the weak current lower core can inhale on pole plate, keeps the purpose that resets and switch on.

The utility model is achieved through the following technical solutions:

The utility model tripping mechanism is fixed in the pedestal in the housing, comprise pull bar, pull-rod spring, dropout plate, iron core, iron core spring, pole shoe, pole plate and tripping coil, the dropout plate rotates to an angle under reset key and pull bar effect and can be up and down, iron core and iron core spring are arranged in the tripping coil, and pole shoe and pole plate fix and be located at the outside of tripping coil.

Described pole plate is anchored on the opening part of U-shaped pole shoe, and both form the closed-loop path.

Described iron core one end contacts at the iron core spring, and the other end passes pole shoe one side and contacts with the dropout plate, and during the tripping coil "on" position, the magnetic field of iron core forms the closed-loop path through pole plate, pole shoe.

The utility model has enough magnetic force in order to make iron core, can hold pole plate, the pole shoe of ad hoc U-shaped and pole plate, and pole shoe will reduce the magnetic resistance with iron core as much as possible, and pole plate is fastened on the pole shoe.Like this, after the tripping coil energising, the magnetic field of iron core forms closed magnetic circuit through pole plate, pole shoe, magnetic field in the closed magnetic circuit is more intense, make iron core behind the elastic force that overcomes the iron core spring, also have enough magnetic force to inhale on pole plate, thereby make the dropout plate can catch on pull bar, keep the "on" position of dynamic and static contact contact.

The utlity model has advantages such as rational in infrastructure, simple, realized that the weak current lower core can inhale on pole plate, keep the purpose of the energising that resets.

Description of drawings

Fig. 1 is the utility model decomposition chart;

Fig. 2 is a circuit breaker blast structural representation;

Fig. 3 is the utility model schematic diagram;

Wherein,

1. upper casing 2. feeler switch plates 3. feeler switch contacts 4. waterproof jackets 5. waterproof pressing plates

6. reset key 7. pull-rod springs 8. pull bars 9. wiring boards 10. pedestals

11. pole plate 12. tripping coils 13. iron core springs 14. iron cores 15. pole shoes

16. dropout plate 17. left spring plate 18. left moving contact 19. left pin 20. left fixed contacts

21. earth pin 22. right spring plate 23. right moving contact 24. right pin 25. right fixed contacts

26. power line sheath 27. power lines 28. left terminal 29. right terminal 30. collision mats

31. handle shell 32. drain pans 33. instrument transformers

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing: comprise pull bar, pull-rod spring, dropout plate, iron core, iron core spring, pole shoe, pole plate and tripping coil,

Embodiment: structure such as Fig. 1, tripping mechanism is fixed in the pedestal 10 in the housing, comprise pull bar 8, pull-rod spring 7, dropout plate 16, iron core 14, iron core spring 13, pole shoe 15, pole plate 11 and tripping coil 12, rotatable certain angle also can be up and down under reset key 6, pull bar 8 and pull-rod spring 7 effects for dropout plate 16, iron core 14 and iron core spring 13 are arranged in the tripping coil 12, and pole shoe 15 and pole plate 11 fix in the outside of tripping coil 12.Pole plate 11 is anchored on the opening part of U-shaped pole shoe, and both form closed loop, four sides.Iron core 14 1 ends contact at iron core spring 13, and the other end passes pole shoe one side and contacts with dropout plate 16, and during the tripping coil "on" position, the magnetic field of iron core forms closed magnetic circuit through pole plate, pole shoe.

As Fig. 2, the concrete structure of ground-fault interrupter comprises housing, tripping mechanism, wiring board 9, instrument transformer 33, pedestal 10 reaches and a pair of

spring plate

17,22 and relative and the contacted stationary contact spare of pin, tripping mechanism, wiring board 9 and spring plate are fixed on the pedestal 10, pedestal 10, wiring board 9 is arranged in the housing, pull bar 8 can fasten with the dropout part, be used to spur spring plate, the purpose of the contacting energising on the stationary contact spare, the end in addition of pull bar 8 is connected with reset key 6 with pull-rod spring 7, iron core 14 and iron core spring 13 are arranged in the tripping coil 12 and the electromagnetic force when being subjected to its energising drives, pole shoe 15, pole plate 11 is fixed on the tripping coil, iron core one end contacts with the dropout part, end can or separate with the pole plate contact in addition, and a pair of spring plate is arranged on the dropout part.Above-mentioned dropout part is a dropout plate 16, and its top is circular-arc, and the basket of left part cooperates with the fastening hook of pull bar bottom.Instrument transformer 33 is loaded on the wiring board 9, wiring board 9 and instrument transformer 33 are formed control circuit, and housing is that the split setting is made up of upper casing 1, drain pan 32 and handle shell 31, is provided with collision mat 30 between the housing, and there are power line 27,

19 and 24 to pass between the housing, power line sheath 26 is arranged on the power line.Housing is provided with feeler switch plate 2, and feeler switch plate 2 and reset key 6 tops are provided with waterproof pressing plate 5 and waterproof jacket 4, and feeler switch below is provided with feeler switch contact 3, electrically connects with test circuit on the wiring board, and reset key and pull-rod spring and pull bar connect as one.

Down when the reset key 6, pull-rod spring 7 is compressed, and pull bar 8 moves downward, and pushes down dropout plate 16 tops, and dropout plate 16 is tilted to the right gradually, and drives iron core 14 and move to right, and compression iron core spring 13.When reset key 6 continued to move down, the hook of pull bar 8 arrived the hook bottom of dropout plate 16, and iron core 14 is contacted with pole plate 11.If this moment, power supply was a "on" position, then tripping coil 12 has electric current to flow through, and the electromagnetic field that it produces makes iron core 14 hold pole plate 11, keeps the heeling condition of dropout plate 16.

When then unclamping reset key 6, pull-rod spring 7 promotes reset key 6, pull bar 8 moves upward, the hook of pull bar 8 fastens dropout plate 16, dropout plate 16 is also moved upward, thereby driving left spring plate 17 and right spring plate 22 is bent upwards, left moving contact 18 is contacted with left fixed contact 20 on the left pin 19, right moving contact 23 contacts with right fixed contact 25 on the right pin 24, finish the galvanization that resets, power supply also is provided with earth pin 21 through spring plate, the connecting line that passes instrument transformer 33 and left terminal 28, right terminal 29 and power line output on this circuit breaker.In order to make iron core 14 that enough magnetic force be arranged, can hold pole plate 11, the pole shoe 15 of ad hoc U-shaped and pole plate 11, pole shoe 15 will reduce the magnetic resistance with iron core 14 as much as possible, and pole plate 11 is fastened on the pole shoe 15.Like this, after tripping coil 12 energisings, the magnetic field of iron core 14 forms closed magnetic circuit through pole plate 11, pole shoe 15, magnetic field in the closed magnetic circuit is more intense, the magnetic force that makes iron core 14 is behind the elastic force that overcomes iron core spring 13, also have enough magnetic force to inhale on pole plate 11, thereby make dropout plate 16 can catch on pull bar 8, keep the "on" position of dynamic and static contact contact.

If during by reset key 6 be power down mode, then tripping coil 12 does not have electric current, does not have magnetic field to produce, and is unclamping reset key 6, and when pull bar 8 moved upward, iron core 14 was pushed to the left side by iron core spring 13, and dropout plate 16 also is pushed to the left side.At this moment, the hook of pull bar 8 colludes less than dropout plate 16, and pull-rod spring 7 just makes reset key 6 and pull bar 8 move upward.Spring plate recovers the nature shape, and dropout plate 16 is pulled to the bottom.Like this, dynamic and static contact still is in open position, and circuit breaker is in off-position.

When residual current surpasses residue operating current value or zero line earth fault (earth resistance is minimum) takes place, control circuit disconnects the electric current of tripping coil 12, iron core 14 and dropout plate 16 are pushed to the left side by iron core spring 13, pull bar 8 is threaded off with dropout plate 16, and pull-rod spring 7 moves upward pull bar 8 and reset key 6.Dropout plate 16 moves downward, and dynamic and static contact disconnects, and disconnects protected circuit.

When outage or power failure (live wire or zero line disconnect), tripping coil 12 no currents, load and power supply also are disconnected.

Iron core 14 was formed closed magnetic circuits with pole shoe 15, pole plate 11 during this was novel, and reduced the magnetic resistance in the closed magnetic circuit to greatest extent, so that tripping coil 12 is under weak current, iron core 14 just has bigger magnetic force, and iron core 14 can be inhaled on pole plate 11.

The above record only for utilizing the embodiment of this origination techniques content, anyly is familiar with modification, the variation that this skill person uses this creation to do to do, and all belongs to the claim of this creation opinion, and is not limited to those disclosed embodiments.

Claims

1. the new tripping mechanism of a ground-fault interrupter, be fixed in the pedestal in the housing, it is characterized in that: comprise pull bar, pull-rod spring, dropout plate, iron core, iron core spring, pole shoe, pole plate and tripping coil, pull-rod spring is placed on the pull bar, the dropout plate rotates to an angle under reset key and pull bar effect and can be up and down, iron core and iron core spring are arranged in the tripping coil, and pole shoe and pole plate fix and be located at the outside of tripping coil.

2. the new tripping mechanism of ground-fault interrupter according to claim 1, it is characterized in that: described pole plate is anchored on the opening part of U-shaped pole shoe, and both form the closed-loop path.

3. the new tripping mechanism of ground-fault interrupter according to claim 1, it is characterized in that: described iron core one end contacts at the iron core spring, the other end passes pole shoe one side and contacts with the dropout plate, during the tripping coil "on" position, the magnetic field of iron core becomes the closed-loop path through plate plate, plate boot-shaped, make tripping coil under weak current, iron core has enough magnetic force to inhale on pole plate, keeps the "on" position of dynamic and static contact contact.

4. the new tripping mechanism of ground-fault interrupter according to claim 1; it is characterized in that: described iron core and the iron core spring that is arranged in the tripping coil, when tripping coil did not have electric current, the iron core spring just promoted iron core and dropout plate; pull bar is threaded off, be in the power-off protection state.