Residual-current circuit breaker with high safety

Abstract

The utility model discloses a residual-current circuit breaker with high safety. The residual-current circuit breaker with high safety comprises a main circuit board, the shell is provided with a first wiring end and a second wiring end; the electromagnetic release is connected with the first wiring terminal; one end of the circuit board is electrically connected with the second wiring end; the operating mechanism is provided with a torsional spring and is electrically connected with the other end of the circuit board, and when the operating mechanism is switched on, the torsional spring tightly acts on the electromagnetic tripper; and the shell is provided with a test button. The torsion spring is electrically connected with the electromagnetic release through the action of the operating mechanism, so that the circuit board is electrified, the design ensures that the circuit board is not continuously electrified no matter how the circuit is reversely connected, and the risk of damage of the circuit breaker is reduced; in addition, due to effective protection of the flash barrier, it is ensured that the zero sequence mutual inductor and weak electric wires of the circuit board are not damaged by electric arcs after opening, and the overall safety is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field especially relates to a leakage circuit breaker with high safety. BACKGROUND

[0002] The circuit breaker refers to the switching device that can close, carry and open the current under normal loop condition and can close, carry and open the current under abnormal loop condition in the prescribed time.

[0003] The existing leakage circuit breaker structure generally takes electricity at the upper end or lower end of leakage circuit breaker due to the line board and test device, one side of the line board electricity taking side is the load side, and the other side is the incoming line side, if the connection is reversed, the line board electricity taking end becomes the power supply side, even if the moving contact breaks the circuit, the line board is still in the electrified state, and the line board is burned out with the trip coil soon, resulting in the damage of the whole circuit breaker. Therefore, the applicant has made beneficial design, found a method to solve the above problems, and the technical scheme to be introduced below is generated under this background. SUMMARY

[0004] The utility model discloses a product that wiring is convenient and safety is improved to overcome the deficiency of the traditional leakage circuit breaker design.

[0005] To solve the above problems, the utility model adopts the following technical scheme.

[0006] A leakage circuit breaker with high safety, comprising; shell, the shell is equipped with first wiring end, second wiring end;Electromagnetic release, the electromagnetic release is connected with first wiring end;Line board, one end of the line board is electrically connected with second wiring end;Operating mechanism, the operating mechanism is equipped with torsional spring, and is electrically connected with the other end of line board, when operating mechanism closes, make the torsional spring tightly act on electromagnetic release;The shell is equipped with test button, the test button is equipped with first spring, is used for making test button reset, the first spring is electrically connected with the other end of line board;The shell is equipped with second spring, and is electrically connected with first wiring end, and the second spring is located below first spring;Arc separation plate is arranged between the line board and second wiring end, and is used for protecting weak current circuit and the role of restraining line.

[0007] Preferably, the first wiring end and the second wiring end are respectively arranged on both sides of one end of the shell, and the shell further comprises a third wiring end and a fourth wiring end corresponding to the first wiring end and the second wiring end respectively.

[0008] Preferably, the operating mechanism comprises a contact holder and a tripping member in linkage action with the contact holder, and the contact holder is provided with a moving contact holder on both sides, and the contact holder is provided with a supporting portion.

[0009] Preferably, the torsion spring is arranged at one side of the contact holder, one end of the torsion spring is in abutment with the supporting part, and the other end of the torsion spring is in active spacing with the conductive position of the electromagnetic release.

[0010] Preferably, the third terminal is provided with a bimetallic strip, the bimetallic strip is provided with a linkage rod and is inserted into the release, and the bimetallic strip is electrically connected to one of the movable contact holders through a flexible connecting wire.

[0011] Preferably, the fourth terminal is electrically connected to the other movable contact holder through a flexible connecting wire.

[0012] Preferably, the zero sequence transformer is further included, both ends of the shell are provided with static contact holders corresponding to the movable contact holders, one of the static contact holders is electrically connected to one end of the electromagnetic release, a flexible connecting wire is arranged between the other end of the electromagnetic release and the first terminal and passes through the zero sequence transformer, and a flexible connecting wire is arranged between the other static contact holder and the second terminal and passes through the zero sequence transformer.

[0013] Preferably, a wire containing cavity is kept between the arc separation plate and the shell, and the wire containing cavity is provided with a wire inlet hole and a wire outlet hole at both sides, respectively.

[0014] Preferably, the first spring is provided with a first extension part and is arranged at one side of the test button, and the second spring is provided with a second extension part and is arranged below the first extension part.

[0015] Beneficial effects:

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] (1) According to the utility model, with the action of the operating mechanism, the closing state is gradually approached, the torsion spring is also closely attached to the conductive part of the electromagnetic release, at this moment, the first terminal transmits the current to the torsion spring to supply power to one end of the circuit board, and the second terminal continuously and stably supplies power to the other end of the circuit board, so that the circuit board enters the energized working state, and the design ensures that the circuit board will not be continuously energized regardless of the reverse connection of the circuit, thereby effectively avoiding the overheat and burnout of the release coil and the circuit board due to long-time energization, and further reducing the risk of damage of the entire circuit breaker, and in addition, the design can realize rapid wiring without complicated learning process, thereby bringing convenience to users.

[0018] (2) The utility model discloses, under the closing state, press the test button, make first spring and second spring electric connection, activate the leakage test loop of circuit board, and produce the leakage current of analog human body contact point, if the leakage protection module of circuit board responds normally, zero sequence mutual inductor will sense leakage current and produce leakage signal, after the leakage signal is enlarged and handled through circuit board, will control electromagnetic release instantaneous action, rapidly cut off the circuit, realize leakage protection, in addition, the effective protection of arc separation board ensures that the arc after opening will not cause damage to the weak current line of zero sequence mutual inductor and circuit board, further improves overall security. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is internal front view of a kind of safety high leakage circuit breaker of the utility model;

[0020] Figure 2 It is the partial enlarged view A of a kind of safety high leakage circuit breaker of the utility model; Figure 1

[0021] Figure 3 It is internal rear structure of a kind of safety high leakage circuit breaker of the utility model; Figure 1

[0022] Figure 4 It is the partial enlarged view B of a kind of safety high leakage circuit breaker of the utility model; Figure 3

[0023] Figure 5 It is internal rear structure of a kind of safety high leakage circuit breaker of the utility model; Figure 2

[0024] The corresponding relationship between the various figure marks and component names in the drawing is as follows:

[0025] Mark: 1, shell;2, electromagnetic release;3, circuit board;4, operating mechanism;5, test button;6, second spring;7, arc separation board;8, zero sequence mutual inductor;9, soft connection line;

[0026] 11, first wiring terminal;12, second wiring terminal;13, third wiring terminal;14, fourth wiring terminal;15, static contact frame;

[0027] 131, bimetallic strip;132, linkage lever;

[0028] 41, torsion spring;42, contact holder;43, release;44, moving contact frame;

[0029] 421, support portion;

[0030] 51, first spring;52, first extension;

[0031] ​​​​61. second extension portion;

[0032] 71. wire accommodating cavity; 72. wire inlet hole; 73. wire outlet hole. DETAILED DESCRIPTION

[0033] The technical solutions of the utility model will be described below in conjunction with the embodiments, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the protection scope of the utility model.

[0034] In the description of the utility model, it should be understood that the orientation or position relation indicated by the terms such as 'up', 'down', 'left', 'right' in the terms is the orientation or position relation based on the orientation or position relation shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and is not indicated or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it can not be understood as the limitation of the utility model.

[0035] In the embodiments of the utility model, 'and / or' is only a kind of description of the association relation of associated object, it can represent three kinds of relations, for example, A and / or B, can represent: three cases of existence A alone, existence A and B simultaneously, existence B alone.In addition, the character ' / ' in this paper generally indicates that the associated object before and after is a kind of 'or' relation.

[0036] Reference Example Figures 1 to 5 A leakage circuit breaker with high safety, comprising: a shell 1, the shell 1 is provided with a first wiring end 11 and a second wiring end 12;An electromagnetic release 2, the electromagnetic release 2 is connected with the first wiring end 11;A circuit board 3, one end of the circuit board 3 is electrically connected with the second wiring end 12;An operating mechanism 4, the operating mechanism 4 is provided with a torsional spring 41, and is electrically connected with the other end of the circuit board 3, when the operating mechanism 4 is closed, the torsional spring 41 is tightly applied to the electromagnetic release 2;The shell 1 is provided with a test button 5, the test button 5 is provided with a first spring 51, for resetting the test button 5, the first spring 51 is electrically connected with the other end of the circuit board 3;The shell 1 is provided with a second spring 6, and is electrically connected with the first wiring end 11, the second spring 6 is located below the first spring 51;An arc separation plate 7 is arranged between the circuit board 3 and the second wiring end 12, for protecting weak current circuit and restraining the effect of circuit;

[0037] It is worth mentioning that the first wiring end 11 and the second wiring end 12 are respectively arranged on both sides of one end of the shell 1, and the shell 1 is further provided with a third wiring end 13 and a fourth wiring end 14 corresponding to the first wiring end 11 and the second wiring end 12 respectively;

[0038] It is worth mentioning that the operating mechanism 4 includes a contact holder 42 and a tripping piece 43 linked with the contact holder 42, both sides of the contact holder 42 are provided with movable contact holders 44, and the contact holder 42 is provided with a supporting part 421, when the circuit breaker is closed, the tripping piece 43 is located in the moving track of the moving iron core of the electromagnetic release 2, and the supporting part 421 drives one end of the torsional spring 41 to move and store energy, so that the other end of the torsional spring 41 tightly abuts against the conductive part of the electromagnetic release 2;

[0039] It is worth mentioning that the torsional spring 41 is arranged on one side of the contact holder 42, one end of the torsional spring 41 abuts against the supporting part 421, and the other end of the torsional spring 41 is movably spaced apart from the conductive position of the electromagnetic release 2;

[0040] It is worth mentioning that the third wiring terminal 13 is provided with a bimetallic strip 131, the bimetallic strip 131 is provided with a linkage rod 132 and is inserted into the tripping piece 43, the bimetallic strip 131 is electrically connected to one of the movable contact holders 44 through the flexible connecting wire 9, when the current passing through the bimetallic strip 131 is too large, the bimetallic strip 131 is quickly heated, the bimetallic strip 131 is bent away from the movable contact holder 44, the tripping piece 43 is driven to move through the linkage rod 132, the tripping piece 43 is disassembled from the contact holder 42, and the opening operation is completed;

[0041] It is worth mentioning that the fourth wiring terminal 14 is electrically connected to the other movable contact holder 44 through the flexible connecting wire 9, and the flexible connecting wire of the application can be selected from a conductive wire or a copper braid;

[0042] It is worth mentioning that the zero sequence transformer 8 is further included, both ends of the shell 1 are provided with static contact holders 15 corresponding to the movable contact holders 44, one of the static contact holders 15 is electrically connected to one end of the electromagnetic release 2, the other end of the electromagnetic release 2 is provided with the flexible connecting wire 9 between the first wiring terminal 11 and passes through the zero sequence transformer 8, the other static contact holder 15 is provided with the flexible connecting wire 9 between the second wiring terminal 12 and passes through the zero sequence transformer 8, in the closed state, the test button 5 is pressed to electrically connect the first spring 51 and the second spring 6, activate the leakage test loop of the circuit board 3, and generate a leakage current simulating human body contact, if the leakage protection module of the circuit board 3 responds normally, the zero sequence transformer 8 will sense the leakage current and generate a leakage signal, after the leakage signal is amplified and processed by the circuit board 3, the electromagnetic release 2 will be controlled to act instantaneously, and the circuit will be quickly cut off, thereby realizing the leakage protection;

[0043] It is worth mentioning that the arc separation plate 7 and the shell 1 keep the wire containing cavity 71, the wire containing cavity 71 is provided with the wire inlet hole 72 and the wire outlet hole 73 on both sides respectively, the weak current line led out from the second wiring terminal 12 and the zero sequence mutual inductor 8 enters the wire containing cavity 71 from the wire inlet hole 72 and passes out from the wire outlet hole 73, the circuit board 3 is just located at the outlet of the wire outlet hole 73 and can be electrically connected with the weak current line, the arc separation plate 7 ensures that the arc after the switch-off does not cause damage to the weak current line of the zero sequence mutual inductor 8 and the circuit board 3, and the overall safety is further improved;

[0044] It is worth mentioning that the first spring 51 is provided with the first extension 52 and arranged on one side of the test button 5, and the second spring 6 is provided with the second extension 61 and arranged below the first extension 52.

[0045] The use principle of the utility model will be described as follows:

[0046] With the contact frame 42 gradually rotating and driving the two movable contact frames 44 to rotate towards the static contact frame 15, the supporting part 421 pushes one end of the torsion spring 41 to move, and when the movable contact frame 44 abuts against the static contact frame 15, the torsion spring 41 also closely adheres to the conductive part of the electromagnetic release 2. At this moment, the first wiring terminal 11 transmits current to the torsion spring 41 to supply power to one end of the circuit board 3, and the second wiring terminal 12 continuously and stably supplies power to the other end of the circuit board 3, so that the circuit board 3 enters the energized working state. This design ensures that the circuit board 3 will not be continuously energized regardless of the reverse connection of the circuit, thereby effectively avoiding the overheating and burning of the release coil and the circuit board 3 due to long-time energization, and further reducing the risk of damage of the entire circuit breaker. In addition, this design can realize quick wiring without complicated learning process, thereby bringing convenience to users.

[0047] The above design scheme can realize the advantages of convenient wiring and improved safety.

[0048] The above content is a further detailed description of the utility model in combination with the specific embodiment, and cannot be considered as limiting the specific implementation of the utility model to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, which should be considered as belonging to the protection range determined by the claims of the utility model.

Claims

1. A ground fault circuit interrupter having high safety, characterized by: Include; The shell (1) is provided with a first terminal (11), a second terminal (12); Electromagnetic release (2), the electromagnetic release (2) is connected with the first terminal (11); The circuit board (3) is electrically connected with the second terminal (12) at one end; The operating mechanism (4) is provided with a torsional spring (41), and is electrically connected with the other end of the circuit board (3), when the operating mechanism (4) is closed, the torsional spring (41) is tightly acted on the electromagnetic release (2); The shell (1) is provided with a test button (5), the test button (5) is provided with a first spring (51), which is used for resetting the test button (5), and the first spring (51) is electrically connected with the other end of the circuit board (3); The shell (1) is provided with a second spring (6), and is electrically connected with the first terminal (11), and the second spring (6) is located below the first spring (51); The arc separation plate (7) is arranged between the circuit board (3) and the second terminal (12), and is used for protecting the weak current circuit and restraining the effect of the circuit.

2. The electric leakage circuit breaker with high safety according to claim 1, characterized in that: The first terminal (11) and the second terminal (12) are arranged on both sides of one end of the shell (1) respectively, and the shell (1) is further provided with a third terminal (13) and a fourth terminal (14) corresponding to the first terminal (11) and the second terminal (12) respectively.

3. The safety ground leakage circuit breaker according to claim 2, wherein: The operating mechanism (4) includes a contact holder (42) and a release part (43) which is linked with the contact holder (42), and the contact holder (42) is provided with a movable contact holder (44) on both sides.

4. The safety ground leakage circuit breaker according to claim 3, wherein: The torsional spring (41) is arranged on one side of the contact holder (42), one end of the torsional spring (41) is abutted with the supporting part (421), and the other end of the torsional spring (41) is kept a distance from the conductive position of the electromagnetic release (2).

5. The safety ground fault circuit interrupter of claim 4, wherein: The third terminal (13) is provided with a bimetallic strip (131), the bimetallic strip (131) is provided with a linkage rod (132) and is inserted into the release part (43), and the bimetallic strip (131) is electrically connected with one of the movable contact holders (44) through a soft connection wire (9).

6. The safety ground fault circuit interrupter of claim 4, wherein: The fourth terminal (14) is electrically connected with the other movable contact holder (44) through a soft connection wire (9).

7. The safety ground fault circuit interrupter of claim 3, wherein: Further including a zero sequence transformer (8), the shell (1) is provided with a static contact holder (15) corresponding to the movable contact holder (44) at both ends, one of the static contact holders (15) is electrically connected with one end of the electromagnetic release (2), a soft connection wire (9) is arranged between the other end of the electromagnetic release (2) and the first terminal (11) and passes through the zero sequence transformer (8), and a soft connection wire (9) is arranged between the other static contact holder (15) and the second terminal (12) and passes through the zero sequence transformer (8).

8. The safety ground fault circuit interrupter according to claim 1, wherein: The arc separation plate (7) and the shell (1) keep a wire containing cavity (71), and the wire containing cavity (71) is provided with a wire inlet hole (72) and a wire outlet hole (73) on both sides respectively.

9. The safety ground fault circuit interrupter according to claim 1, wherein: The first spring (51) is provided with a first extension (52) and arranged on one side of the test button (5), and the second spring (6) is provided with a second extension (61) and arranged below the first extension (52).

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