CN206961761U - A kind of miniature circuit breaker and its current sensing means - Google Patents
A kind of miniature circuit breaker and its current sensing means Download PDFInfo
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- CN206961761U CN206961761U CN201720765781.2U CN201720765781U CN206961761U CN 206961761 U CN206961761 U CN 206961761U CN 201720765781 U CN201720765781 U CN 201720765781U CN 206961761 U CN206961761 U CN 206961761U
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Abstract
The utility model provides a kind of miniature circuit breaker and its current sensing means, and due to being connected with fixed value resistance between input terminal and outlet terminal, the resistance value between the first test side and the second test side of fixed value resistance is setting value；The first test side and the second test side of fixed value resistance are connected with the voltage acquisition module of control circuit board, voltage acquisition module can gather the magnitude of voltage between the first test side and the second test side, so as to draw the size of current passed through in breaker according to the resistance value of magnitude of voltage and fixed value resistance.And, because the fixed value resistance is arranged between input terminal and contact apparatus, when contact apparatus is off, isolate between the input terminal of breaker and outlet terminal, so it is also what is isolated between control circuit board and its control circuit and the outlet terminal of breaker, this mode is safer reliable between outlet terminal and contact apparatus compared to fixed value resistance is arranged on.
Description
Technical field
A kind of miniature circuit breaker and its current sensing means are the utility model is related to, belongs to miniature circuit breaker technical field.
Background technology
Miniature circuit breaker is used for the continuous conjunction of circuit or disconnected, when miniature circuit breaker works, its input terminal and outlet
Carry electric current between terminal, the electric current in circuit may fluctuate, and when electric current fluctuates, miniature circuit breaker can root
Circuit is disconnected to prevent circuit to be damaged with electrical equipment according to situation.The electric current passed through in breaker is breaker work
Important parameter, it is therefore necessary to be monitored to the electric current passed through in breaker, in the prior art using current transformer to disconnected
Electric current in the device of road is sampled, but current transformer volume is larger, is difficult to place in miniature circuit breaker, installation is very tired
It is difficult.
Utility model content
In view of the above the shortcomings that prior art, the technical problems to be solved in the utility model is to provide a kind of small-sized
Breaker and its current sensing means, it can easily detect the electric current passed through in breaker.
To achieve the above object, the utility model provides a kind of current sensing means of miniature circuit breaker, using following skill
Art scheme：A kind of current sensing means of miniature circuit breaker, including control circuit board, input terminal, fixed value resistance, contact apparatus
And outlet terminal, the contact apparatus include the first contact and the second contact that can be contacted with each other or separate, the definite value
Resistance is connected between input terminal and the first contact, and second contact is connected with outlet terminal；The fixed value resistance has
First test side and the second test side, the control circuit board have voltage acquisition module；First test side and the second inspection
End is surveyed to be connected with the voltage acquisition module on control circuit board.
Preferably, first contact is moving contact, and the second contact is static contact, the first contact and opening/closing operation mechanism
Connection.
Preferably, first contact is static contact, and the second contact is moving contact, the second contact and opening/closing operation mechanism
Connection.
Preferably, in addition to thermal tripping device of bimetallic strip, thermal tripping device of bimetallic strip have a bimetal leaf, double gold
One end of category piece is connected by flexible circuit conductor with second contact, and the other end and the outlet terminal of bimetal leaf are conductively connected.
Preferably, electromagnetic tripping apparatus is provided between the fixed value resistance and the first contact, electromagnetic tripping apparatus has electricity
Magnetic coil, one end and the fixed value resistance of magnet coil are conductively connected, and the other end of magnet coil is conductively connected with the first contact.
Preferably, voltage comparison module is additionally provided with the control circuit board, voltage comparison module is adopted for receiving voltage
Collect the magnitude of voltage of module collection.
Preferably, the fixed value resistance is a copper-manganese piece.
Preferably, first test side and the second test side are arranged on the side of the copper-manganese piece.
With a kind of current sensing means of miniature circuit breaker of the present utility model correspondingly, the utility model also provides one kind
Miniature circuit breaker, including the current detecting dress of above-mentioned technical proposal or its any preferably miniature circuit breaker described in technical scheme
Put.
As described above, a kind of miniature circuit breaker and its current sensing means that the utility model is related to, have beneficial below
Effect：Due to being connected with fixed value resistance, the first test side of fixed value resistance and the second inspection between input terminal and outlet terminal
The resistance value surveyed between end is setting value；Voltage of the first test side and the second test side of fixed value resistance with control circuit board
Acquisition module connects, and voltage acquisition module can gather the magnitude of voltage between the first test side and the second test side, so as to basis
The resistance value of magnitude of voltage and fixed value resistance draws the size of current passed through in breaker.The fixed value resistance is additionally, since to be arranged on
Between input terminal and contact apparatus, when contact apparatus is off, the input terminal of breaker and outlet terminal it
Between be isolation, so between control circuit board and its control circuit and the outlet terminal of breaker and isolating, this side
Formula is safer reliable between outlet terminal and contact apparatus compared to fixed value resistance is arranged on.
Brief description of the drawings
Fig. 1 is shown as a kind of structural representation of the current sensing means of miniature circuit breaker of the present utility model；
Fig. 2 is shown as the connection diagram of the first connection sheet, the second connection sheet, fixed value resistance and the 3rd connection sheet；
Fig. 3 is shown as control circuit board in a kind of current sensing means of miniature circuit breaker of the present utility model, definite value
The control connection diagram of resistance and opening/closing operation mechanism.
Component label instructions
The bimetal leaf of 1 input terminal 10
The flexible circuit conductor of 2 fixed value resistance 11
The connection sheet of 3 contact apparatus 12 first
The connection sheet of 4 outlet terminal 13 second
The connection sheet of 5 first contact 14 the 3rd
The connection sheet of 6 second contact 15 the 4th
The connection sheet of 7 first test side 16 the 5th
The electromagnetic tripping apparatus of 8 second test side 17
Bimetal leaf thermal tripping fills
9 put 18 magnet coils
Embodiment
Embodiment of the present utility model is illustrated by particular specific embodiment below, those skilled in the art can be by this
Content disclosed by specification understands other advantages and effect of the present utility model easily.
It should be clear that structure, ratio, size depicted in this specification institute accompanying drawings etc., only coordinating specification to be taken off
The content shown, so that those skilled in the art understands and reads, it is not limited to the enforceable restriction bar of the utility model
Part, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size, do not influenceing
Under the effect of the utility model can be generated and the purpose that can reach, all should still it fall in the technology disclosed in the utility model
In the range of Rong get Neng is covered.Meanwhile cited such as " on ", " under ", "left", "right", the use of " centre " in this specification
Language, be merely convenient to narration understand, and be not used to limit the enforceable scope of the utility model, the change of its relativeness or
Adjustment, in the case where changing technology contents without essence, when being also considered as the enforceable category of the utility model.
In the description to embodiment of the present utility model below, the transmission direction of " electric current " be from " supply side " to
The power transmission direction of " electric side ", can be identical or opposite with electronics moving direction.
Such as Fig. 1 and a kind of shown, current sensing means of miniature circuit breaker of the utility model offer, including control circuit
Plate, input terminal 1, fixed value resistance 2, contact apparatus 3 and outlet terminal 4, the contact apparatus 3 include can contact with each other or
The first contact 5 and the second contact 6 of separation, the fixed value resistance 2 is connected between the contact 5 of input terminal 1 and first, and described the
Two contacts 6 are connected with outlet terminal 4；The fixed value resistance 2 has the first test side 7 and the second test side 8, refer to Fig. 3, institute
Stating control circuit board has voltage acquisition module；The test side 8 of first test side 7 and second and the voltage on control circuit board
Acquisition module connects.Due to being connected with fixed value resistance 2, the first inspection of fixed value resistance 2 between input terminal 1 and outlet terminal 4
The resistance value surveyed between the test side 8 of end 7 and second is setting value；The first test side 7 and the second test side 8 of fixed value resistance 2 are equal
Be connected with the voltage acquisition module of control circuit board, voltage acquisition module can gather the first test side 7 and the second test side 8 it
Between magnitude of voltage, so as to drawing the size of current passed through in breaker according to the resistance value of magnitude of voltage and fixed value resistance 2.Moreover,
Because the fixed value resistance 2 is arranged between input terminal 1 and contact apparatus 3, when contact apparatus 3 is off, open circuit
Isolate between the input terminal 1 of device and outlet terminal 4, so the outlet of control circuit board and its control circuit and breaker
It is also isolation between terminal 4, in the case that control circuit is from the upstream circuitry power taking of supply side, the outlet terminal of breaker
4 sides can not possibly be powered, and this mode is more pacified compared to fixed value resistance 2 is arranged between outlet terminal 4 and contact apparatus 3
It is complete reliable.
In a kind of current sensing means of miniature circuit breaker of the present utility model, the fixed value resistance 2 is connected to open circuit
The side of input terminal 1 of device, when in use, input terminal 1 is connected breaker with the upstream circuitry of supply side, the outlet of breaker
Terminal 4 is connected with the circuit downstream of electricity consumption side.The first contact 5 and the second contact 6 in the contact apparatus 3 of breaker are used for electricity
Road connects or disconnects, and contact apparatus 3 generally comprises moving contact and static contact, and moving contact and opening/closing operation mechanism are (in figure not
Mark) connection, opening/closing operation mechanism can drive that moving contact move to static contact and being contacted with static contact connects circuit, divide
Switch-on operating mechanism can also drive moving contact away from static contact and being separated with static contact disconnects circuit.As a kind of preferable
Mode, as shown in figure 1, in contact apparatus 3, first contact 5 is static contact, and the second contact 6 is moving contact, the second contact
6 are connected with opening/closing operation mechanism, and opening/closing operation mechanism can drive the second contact 6 to be moved to the first contact 5 and make circuit
Connect, opening/closing operation mechanism can drive the second contact 6 to disconnect circuit away from the first contact 5.This practicality shown in Fig. 1
In a kind of embodiment of the current sensing means of new miniature circuit breaker, static contact is close to input terminal 1 and moving contact leans on
Nearly outlet terminal 4, electric current from the upstream circuitry of supply side flow through successively input terminal 1, fixed value resistance 2, static contact, moving contact,
Outlet terminal 4 and to the circuit downstream transmission of electricity consumption side.In actual use, moving contact can also be made close to input terminal 1 and
Static contact is set to flow through input terminal 1, fixed value resistance 2 successively close to outlet terminal 4, electric current from the upstream circuitry of supply side, move and touch
Head, static contact, outlet terminal 4 and to the circuit downstream transmission of electricity consumption side；In this case, with the embodiment shown in Fig. 1
Unlike, first contact 5 is moving contact, and the second contact 6 is static contact, and the first contact 5 connects with opening/closing operation mechanism
Connect；Opening/closing operation mechanism can drive the first contact 5 to be moved to the second contact 6 and connect circuit, opening/closing operation mechanism
The first contact 5 can be driven to disconnect circuit away from the second contact 6.In a word, in a kind of miniature circuit breaker of the present utility model
Current sensing means in, the fixed value resistance 2 be connected to the input terminal 1 of breaker and contact apparatus 3 the first contact 5 it
Between, when the first contact 5 of contact apparatus 3 and the second contact 6 are off, the input terminal 1 and leading-out terminal of breaker
It is isolation between son 4, so be also what is isolated between control circuit board and its control circuit and the outlet terminal 4 of breaker,
In the case that control circuit is from the upstream circuitry power taking of supply side, the side of outlet terminal 4 of breaker can not possibly be powered, this
Mode is safer reliable between outlet terminal 4 and contact apparatus 3 compared to fixed value resistance 2 is arranged on.
As shown in figure 1, first contact 5 is static contact, the second contact 6 is moving contact, moving contact and breaking-closing operating
Mechanism is connected, in order that miniature circuit breaker has short-circuit protection function, electricity is provided between the contact 5 of fixed value resistance 2 and first
Magnetic trip gear 17, electromagnetic tripping apparatus 17 have magnet coil 18, and one end of magnet coil 18 and fixed value resistance 2 are conductive even
Connect, the other end of magnet coil 18 is conductively connected with the first contact 5；The first connection sheet 12 is connected with input terminal 1, first connects
Contact pin 12 is connected with the second connection sheet 13, and the second connection sheet 13 is connected to the lower end of fixed value resistance 2, and the upper end of fixed value resistance 2 leads to
The 3rd connection sheet 14 is crossed to be connected with magnet coil 18；When circuit occurs short-circuit, the electric current in miniature circuit breaker increases rapidly, electricity
Magnetic coil 18 produces induced field and electromagnetic tripping apparatus 17 is offended the electrical apparatus release (not marked in figure) of breaker and produce dropout
Action, moving contact and the static contact separation of contact apparatus 3.In order that miniature circuit breaker has overload protection function, this practicality is newly
A kind of current sensing means of miniature circuit breaker of type also includes thermal tripping device of bimetallic strip 9, thermal tripping device of bimetallic strip 9
With a bimetal leaf 10, one end of bimetal leaf 10 is connected by flexible circuit conductor 11 with second contact 6, bimetal leaf 10
The other end is conductively connected with outlet terminal 4, when the electric current passed through in breaker is excessive, the temperature distortion of bimetal leaf 10 and offend
The electrical apparatus release of breaker produces trip action, and the first contact 5 and the second contact 6 of contact apparatus 3 separate and disconnect circuit.Such as
Shown in Fig. 1, the lower end of bimetal leaf 10 is connected by the 4th connection sheet 15 with the 5th connection sheet 16, the 5th connection sheet 16 and outlet
Terminal 4 connects.
Having in the prior art much can be as the component of fixed value resistance 2, in a kind of small-sized open circuit of the present utility model
In the current sensing means of device, in order that testing result is accurate, fixed value resistance 2 is using the minimum material system of temperature coefficient of resistivity
Into when atmospheric temperature changes, the resistance value of fixed value resistance 2 is basically unchanged or only occurred small change, manganese
The temperature drift coefficient of copper product is very low, and resistivity is a kind of industrial conductive material being easily obtained to temperature-insensitive, is easy to add
Work manufactures, and cost is relatively low, particularly suitable for making fixed value resistance 2, it is preferable that as shown in Fig. 2 the fixed value resistance 2 is one
Copper-manganese piece, it is connected for the ease of copper-manganese piece with control circuit board, the test side 8 of the first test side 7 and second is arranged on described
On the side of copper-manganese piece, connected between control circuit board and the test side 8 of first test side 7 and second by wire.
Fig. 3 is shown as control circuit board in a kind of current sensing means of miniature circuit breaker of the present utility model, definite value
The control connection diagram of resistance 2 and opening/closing operation mechanism, voltage comparison module, voltage are additionally provided with the control circuit board
Comparison module is used for the magnitude of voltage of receiving voltage acquisition module collection.In a kind of miniature circuit breaker work of the present utility model,
The magnitude of voltage at voltage acquisition module collection fixed value resistance 2 both ends；Setting voltage is stored with memory module in control circuit board
It is worth, the setting magnitude of voltage stored in magnitude of voltage and memory module that voltage comparison module gathers voltage acquisition module is compared
Compared with；If the magnitude of voltage at the both ends of fixed value resistance 2 is more than or equal to the setting magnitude of voltage, the control unit control in control circuit board
Electrical apparatus release processed is threaded off so that breaker open operation；If the magnitude of voltage at the both ends of fixed value resistance 2 is less than or equal to the setting magnitude of voltage,
Breaker holding circuit on-state.
With a kind of current sensing means of miniature circuit breaker of the present utility model correspondingly, the utility model also provides one kind
Miniature circuit breaker, including the current detecting dress of above-mentioned technical proposal or its any preferably miniature circuit breaker described in technical scheme
Put.
Based on the embodiment above, a kind of miniature circuit breaker and its current sensing means of the present utility model, can facilitate
The electric current passed through in ground detection breaker；The fixed value resistance 2 is additionally, since to be arranged between input terminal 1 and contact apparatus 3,
When contact apparatus 3 is off, isolate between the input terminal 1 and outlet terminal 4 of breaker, so control line
It is also what is isolated between road plate and its control circuit and the outlet terminal 4 of breaker, when control circuit is electric from the upstream of supply side
In the case of the power taking of road, the side of outlet terminal 4 of breaker can not possibly be powered, and this mode is set compared to by fixed value resistance 2
It is safer reliable between outlet terminal 4 and contact apparatus 3.
In summary, the utility model effectively overcomes various shortcoming of the prior art and has high industrial exploitation value
Value.
Above-described embodiment only illustrative principle of the present utility model and its effect are new not for this practicality is limited
Type.Any person skilled in the art can all be carried out without prejudice under spirit and scope of the present utility model to above-described embodiment
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the essence disclosed in the utility model
God and all equivalent modifications completed under technological thought or change, should be covered by claim of the present utility model.
Claims (9)
1. a kind of current sensing means of miniature circuit breaker, it is characterized in that, including control circuit board, input terminal (1), definite value electricity
(2), contact apparatus (3) and outlet terminal (4) are hindered, the contact apparatus (3) includes first that can contact with each other or separate
Contact (5) and the second contact (6), the fixed value resistance (2) are connected between input terminal (1) and the first contact (5), and described
Two contacts (6) are connected with outlet terminal (4)；
There is the fixed value resistance (2) the first test side (7) and the second test side (8), the control circuit board there is voltage to adopt
Collect module；First test side (7) and the second test side (8) are connected with the voltage acquisition module on control circuit board.
2. the current sensing means of miniature circuit breaker according to claim 1, it is characterised in that：First contact (5)
For moving contact, the second contact (6) is static contact, and the first contact (5) is connected with opening/closing operation mechanism.
3. the current sensing means of miniature circuit breaker according to claim 1, it is characterised in that：First contact (5)
For static contact, the second contact (6) is moving contact, and the second contact (6) is connected with opening/closing operation mechanism.
4. the current sensing means of miniature circuit breaker according to claim 3, it is characterised in that：Also include bimetal leaf heat
Trip gear (9), thermal tripping device of bimetallic strip (9) have a bimetal leaf (10), and one end of bimetal leaf (10) passes through soft
Wire (11) is connected with second contact (6), and the other end and the outlet terminal (4) of bimetal leaf (10) are conductively connected.
5. the current sensing means of miniature circuit breaker according to claim 3, it is characterised in that：The fixed value resistance (2)
Electromagnetic tripping apparatus (17) is provided between the first contact (5), electromagnetic tripping apparatus (17) has magnet coil (18), electromagnetic wire
One end of circle (18) is conductively connected with fixed value resistance (2), and the other end and the first contact (5) of magnet coil (18) are conductively connected.
6. the current sensing means of miniature circuit breaker according to claim 1, it is characterised in that：On the control circuit board
Voltage comparison module is additionally provided with, voltage comparison module is used for the magnitude of voltage of receiving voltage acquisition module collection.
7. the current sensing means of miniature circuit breaker according to claim 1, it is characterised in that：The fixed value resistance (2)
For a copper-manganese piece.
8. the current sensing means of miniature circuit breaker according to claim 7, it is characterised in that：First test side
(7) it is arranged on the second test side (8) on the side of the copper-manganese piece.
9. a kind of miniature circuit breaker, it is characterized in that, include the electric current inspection of the miniature circuit breaker described in any one of claim 1 to 8
Survey device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720765781.2U CN206961761U (en) | 2017-06-28 | 2017-06-28 | A kind of miniature circuit breaker and its current sensing means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720765781.2U CN206961761U (en) | 2017-06-28 | 2017-06-28 | A kind of miniature circuit breaker and its current sensing means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206961761U true CN206961761U (en) | 2018-02-02 |
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ID=61386387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720765781.2U Active CN206961761U (en) | 2017-06-28 | 2017-06-28 | A kind of miniature circuit breaker and its current sensing means |
Country Status (1)
| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597962A (en) * | 2018-03-22 | 2018-09-28 | 华为技术有限公司 | A kind of miniature circuit breaker and its control method, system |
| CN112768315A (en) * | 2020-12-31 | 2021-05-07 | 上海佳岚智能科技有限公司 | Intelligent miniature circuit breaker and method |
| WO2022062213A1 (en) * | 2020-09-27 | 2022-03-31 | 深圳曼顿科技有限公司 | Direct-current circuit breaker |
-
2017
- 2017-06-28 CN CN201720765781.2U patent/CN206961761U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597962A (en) * | 2018-03-22 | 2018-09-28 | 华为技术有限公司 | A kind of miniature circuit breaker and its control method, system |
| US10818459B2 (en) | 2018-03-22 | 2020-10-27 | Huawei Technologies Co., Ltd. | Miniature circuit breaker, control method thereof, and control system thereof |
| WO2022062213A1 (en) * | 2020-09-27 | 2022-03-31 | 深圳曼顿科技有限公司 | Direct-current circuit breaker |
| CN112768315A (en) * | 2020-12-31 | 2021-05-07 | 上海佳岚智能科技有限公司 | Intelligent miniature circuit breaker and method |
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