CN212010882U

CN212010882U - Plastic case leakage circuit breaker

Info

Publication number: CN212010882U
Application number: CN202021027434.8U
Authority: CN
Inventors: 吴磊
Original assignee: Gret Electric Co ltd
Current assignee: Gret Electric Co ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2020-11-24
Anticipated expiration: 2030-06-08

Abstract

A molded case leakage circuit breaker. The problem that the existing plastic shell leakage circuit breaker is easy to burn out when reversely connected is solved. The novel safety protection device comprises a shell, wherein a wiring terminal, a rotating shaft, a contact system, a trip coil group and a control circuit board are arranged in the shell, the contact system comprises a movable contact piece and a static contact piece, the movable contact piece is provided with a first position separated from the static contact piece and a second position attached to the static contact piece to conduct a circuit, the movable contact piece is arranged on the rotating shaft and driven by the rotating shaft to move, the control circuit board is electrically connected with the trip coil group, and a safety protection device used for protecting the trip coil group and the control circuit board is arranged on the shell. The beneficial effects of the utility model are that, safety arrangement has been set up for moulded case electric leakage circuit breaker is just connecing or when the reversal as long as the movable contact piece is in the open position, and trip coil group is just uncharged, thereby trip coil group, control scheme board burn out when avoiding the reversal, and the security performance is higher.

Description

Plastic case leakage circuit breaker

Technical Field

The utility model relates to a circuit breaker, concretely relates to moulded case leakage circuit breaker.

Background

The molded case leakage circuit breaker is also called a device-type circuit breaker, all parts are sealed in a plastic shell, the molded case refers to a plastic insulator which is used as the shell of the device and used for isolating conductors and grounding metal parts, the molded case leakage circuit breaker can automatically cut off current after the current exceeds a trip setting, and the molded case leakage circuit breaker usually comprises an electromagnetic trip unit and a leakage electric shock signal judging and tripping unit. The existing plastic case leakage circuit breaker generally comprises a shell, an operating mechanism, a contact system, a tripping system and the like, wherein the operating mechanism drives a moving contact system to perform switching-on operation or switching-off operation through a transmission mechanism, and the tripping system can also break the contact system through the transmission mechanism when the current exceeds a set value. However, in the actual production process, because the terminal at one end of the plastic case leakage circuit breaker is connected with an external power supply and the other end is connected with an electrical appliance, the leakage tripping coil must be installed on the outlet terminal close to the electrical appliance end. When the power line is reversely connected, the trip coil and the control circuit board are still electrified after the contact system of the circuit breaker is disconnected, and the power supply on the trip coil and the control circuit board cannot be effectively cut off, so that the trip coil and the control circuit board are burnt, and great potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

For the problem that burns out easily when solving the current moulded case electric leakage circuit breaker reversal among the background art, the utility model provides a moulded case electric leakage circuit breaker.

The technical scheme of the utility model is that: the utility model provides a moulded case leakage circuit breaker, includes the casing, the casing in be equipped with binding post, pivot, contact system, trip coil group and control scheme board, the contact system include movable contact and static contact, the movable contact have with the first position of static contact separation and with the second position of static contact laminating conduction circuit, the movable contact locate in the pivot and drive its motion by the pivot, control scheme board and trip coil group electricity be connected, the casing on be equipped with the safety arrangement who is used for protecting trip coil group, control scheme board.

As an improvement of the utility model, the safety protection device locate between binding post and the trip coil group and protect trip coil group, control scheme board through dividing disconnected trip coil group when the movable contact spring is in the first position.

As a further improvement of the present invention, the safety protection device includes a switch and a transmission member for switching the driving switch, and the movable contact piece is separated by the tripping coil set through the transmission member switch when in the first position.

As a further improvement of the utility model, the driving medium include articulated portion, installation department and transmission portion, the installation department on be equipped with the elastic component that is used for change over switch.

As a further improvement of the present invention, the hinge portion is hinged to the switch, the mounting portion is horizontally disposed, and the rotating shaft is abutted to the transmission portion when the movable contact is in the first position and is switched on and off by the elastic member on the mounting portion.

As a further improvement of the utility model, the switch is a micro switch.

As a further improvement of the utility model, the safety protection device is fixed on the shell through the mounting bracket.

As a further improvement of the present invention, the housing is provided with a notch, and the mounting bracket is provided with mounting legs, which are inserted into the notch.

As a further improvement of the utility model, the safety protection device locate between binding post and the control scheme board and through breaking control scheme board protection trip coil group, control scheme board when the movable contact spring is in the first position.

The beneficial effects of the utility model are that, safety arrangement has been set up for moulded case electric leakage circuit breaker is just connecing or when the reversal as long as the movable contact piece is in the open position, and trip coil group is just uncharged, thereby trip coil group, control scheme board burn out when avoiding the reversal, and the security performance is higher. The utility model discloses simple structure still has, convenient assembling, and the action is reliable, advantages such as long service life.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 2 is a schematic diagram of the exploded structure of fig. 1.

Fig. 3 is a schematic structural diagram of a second embodiment of the present invention.

Fig. 4 is a schematic diagram of the exploded structure of fig. 3.

Fig. 5 is a schematic view of the structure of fig. 4 at the mounting portion 72.

In the figure, 1, a housing; 11. a notch; 2. a rotating shaft; 3. a trip coil assembly; 4. a control circuit board; 5. a movable contact spring; 6. a switch; 7. a transmission member; 71. a hinge portion; 72. an installation part; 73. a transmission section; 74. an elastic member; 8. mounting a bracket; 81. mounting support legs; 9. a safety protection device.

Detailed Description

The embodiments of the present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1 and fig. 2-5, a molded case leakage circuit breaker includes a housing 1, a wiring terminal, a rotating shaft 2, a contact system, a trip coil assembly 3 and a control circuit board 4 are arranged in the housing 1, the contact system includes a movable contact 5 and a static contact, the movable contact 5 has a first position separated from the static contact and a second position attached to the static contact to conduct a circuit, the movable contact 5 is arranged on the rotating shaft 2 and driven by the rotating shaft 2 to move, the control circuit board 4 is electrically connected with the trip coil assembly 3, and the housing 1 is provided with a safety protection device 9 for protecting the trip coil assembly 3 and the control circuit board 4. The beneficial effects of the utility model are that, safety arrangement has been set up for moulded case electric leakage circuit breaker is just connecing or when the reversal as long as the movable contact piece is in the open position, and trip coil group is just uncharged, thereby trip coil group, control scheme board burn out when avoiding the reversal, and the security performance is higher. The utility model discloses simple structure still has, convenient assembling, and the action is reliable, advantages such as long service life. The molded case leakage circuit breaker has A, B, C, N phases, and an operating mechanism is generally arranged above the B phase. The utility model discloses a safety arrangement sets up on C looks or A looks, corresponds attached drawing 1 and attached drawing 3. Therefore, the rotating shaft can conveniently and reliably drive the safety protection device to act, and more specifically, the safety protection device, the control circuit board and the coil tripping group are usually arranged in the same phase, so that wiring is facilitated.

The safety protection device 9 is arranged between the wiring terminal and the trip coil group 3 and protects the trip coil group 3 and the control circuit board 4 by breaking the trip coil group 3 when the movable contact 5 is at the first position. Therefore, the electric connection of the tripping coil group can be disconnected by only one safety protection device, so that the tripping coil group comprises a control circuit board and a coil tripping group, and the burning of parts in reverse connection is avoided.

The safety protection device comprises a switch 6 and a transmission piece 7 for driving the switch 6 to switch, and the movable contact piece 5 switches the switch 6 through the transmission piece 7 when in the first position so as to break the tripping coil group 3. Specifically, the transmission member 7 includes a hinge portion 71, a mounting portion 72 and a transmission portion 73, and the mounting portion 72 is provided with an elastic member 74 for switching the switch 6. Usually be equipped with the touch panel on the elastic component, the touch panel makes the contact of switch combine to switch on the circuit when the circuit breaker closes a floodgate, and control scheme board and coil trip group can normally work this moment, and when the circuit breaker separating brake, the pivot driving medium rotates to make touch panel and contact separation through the spring, coil trip group must not be electrified this moment, no matter just adorn or reversal promptly, when the movable contact breaks off, coil trip group is all uncharged.

The hinge part 71 is hinged on the switch 6, the mounting part 72 is horizontally arranged, and the rotating shaft 2 is abutted against the transmission part 73 when the movable contact piece 5 is at the first position, and the switch 6 is switched through the elastic piece 74 on the mounting part 72, so that the switch 6 is switched off. Specifically, the switch 6 is a microswitch. The structure enables the product to stably and reliably move, and the spring is convenient to reliably drive the switch to switch.

The safety protection device is fixed on the shell 1 through a mounting bracket 8. Specifically, the housing 1 is provided with a notch 11, the mounting bracket 8 is provided with a mounting support 81, and the mounting support 81 is clamped in the notch 11. The structure is convenient for the installation and the fixation of the safety protection device, the fixation is reliable, and the wiring is convenient.

The safety protection device is arranged between the wiring terminal and the control circuit board 4 and protects the tripping coil group 3 and the control circuit board 4 by breaking the control circuit board 4 when the movable contact 5 is at the first position. The utility model discloses also can avoid reverse connection time control circuit board, trip coil group to burn out through the mode of breaking the control scheme board.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.

Claims

1. A plastic case leakage circuit breaker comprises a shell (1) and is characterized in that a wiring terminal, a rotating shaft (2), a contact system, a trip coil group (3) and a control circuit board (4) are arranged in the shell (1), the contact system comprises a movable contact piece (5) and a static contact piece, the movable contact piece (5) is provided with a first position separated from the static contact piece and a second position attached to the static contact piece to conduct a circuit, the movable contact piece (5) is arranged on the rotating shaft (2) and driven by the rotating shaft (2) to move, the control circuit board (4) is electrically connected with the trip coil group (3), and a safety protection device (9) used for protecting the trip coil group (3) and the control circuit board (4) is arranged on the shell (1).

2. A molded case residual current circuit breaker according to claim 1, wherein said safety protection device (9) is provided between the terminal block and the trip coil assembly (3) and protects the trip coil assembly (3) and the control circuit board (4) by breaking the trip coil assembly (3) when the movable contact (5) is in the first position.

3. A molded case residual current circuit breaker according to claim 2, characterized in that said safety protection device comprises a switch (6) and a transmission member (7) for driving the switch (6) to switch, said movable contact (5) in the first position switches the switch (6) via the transmission member (7) to break the trip coil assembly (3).

4. A molded case residual current circuit breaker according to claim 3, wherein said transmission member (7) comprises a hinge portion (71), a mounting portion (72) and a transmission portion (73), said mounting portion (72) being provided with an elastic member (74) for switching the switch (6).

5. A molded case leakage circuit breaker according to claim 4, wherein said hinge portion (71) is hinged to said switch (6), said mounting portion (72) is horizontally disposed, and said rotary shaft (2) abuts against said transmission portion (73) when said movable contact (5) is in said first position and switches said switch (6) by means of said elastic member (74) of said mounting portion (72) and causes said switch (6) to be opened.

6. A molded case leakage circuit breaker according to claim 3, wherein said switch (6) is a micro switch.

7. A molded case residual current circuit breaker according to claim 1, wherein said safety device is fixed to said case (1) by means of a mounting bracket (8).

8. A molded case leakage circuit breaker according to claim 7, wherein said case (1) is provided with a notch (11), said mounting bracket (8) is provided with a mounting leg (81), and said mounting leg (81) is engaged in said notch (11).

9. A molded case residual current circuit breaker according to claim 1, wherein said safety protection means is provided between the terminal block and the control circuit board (4) and protects the trip coil assembly (3) and the control circuit board (4) by breaking the control circuit board (4) when the movable contact (5) is in the first position.