CN206250743U - A kind of breaker of plastic casing - Google Patents
A kind of breaker of plastic casing Download PDFInfo
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- CN206250743U CN206250743U CN201621423064.3U CN201621423064U CN206250743U CN 206250743 U CN206250743 U CN 206250743U CN 201621423064 U CN201621423064 U CN 201621423064U CN 206250743 U CN206250743 U CN 206250743U
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- circuit
- intelligent controller
- breaker
- power module
- threephase switch
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Abstract
The utility model discloses a kind of breaker of plastic casing, belong to low-voltage electrical technical field.It includes：Current transformer, extracts for being sampled to main circuit current and from major loop electric energy；Threephase switch power module, is independent one piece of electronic circuit board, for outside three-phase alternating current to be converted into direct current；Intelligent controller, it is connected in pluggable mode with the threephase switch power module, the intelligent controller includes power circuit, and the power circuit is used to that the consuming parts in the power supply voltage supplying intelligent controller that is adapted to be selected all the way and be converted into from the output of current transformer and threephase switch power module；Housing, for accommodating current transformer, threephase switch power module, intelligent controller.Compared to existing technology, the utility model effectively increases the electrical stability of intelligent controller by increasing modular threephase switch power module in intelligent breaker, and simple and compact for structure, easy to use.
Description
Technical field
The utility model is related to a kind of breaker of plastic casing, belongs to low-voltage electrical technical field.
Background technology
With the ripe application of new technology, new material in low-voltage intelligent plastic casing breaker, breaker of plastic casing is gradually to small
Type and multifunctional direction develop.In the application of intelligent circuit breaker, power-supply system is directly connected to whole hardware system
Reliability and security.Common intelligent breaker can provide the protection such as overload, short circuit, ground connection, and its power supply is typically all used
Internal current transformer self-powered, when working as the rated value that light load, particularly load current are less than below 0.4 times of breaker,
On breaker the intelligent controller of institute's band cannot normal work, especially for increased residual current protecting, cross low pressure protect
The breaker of the functions such as shield, off zero and open-phase protection, just must be equipped with extra electricity on the basis of current transformer is self-powered
Source module, and because assembly space is compact in many miniaturization power distribution cabinets, it is impossible to external accessory power supply is directly provided.
Utility model content
Technical problem to be solved in the utility model is to overcome prior art not enough, there is provided a kind of simple structure is tight
Gather, the intelligent breaker of built-in auxiliary power module easy to use.
The utility model specifically solves above-mentioned technical problem using following technical scheme：
A kind of breaker of plastic casing, including：
Current transformer, extracts for being sampled to main circuit current and from major loop electric energy；
Threephase switch power module, is independent one piece of electronic circuit board, for outside three-phase alternating current to be converted to directly
Stream electricity；
Intelligent controller, it is connected in pluggable mode with the threephase switch power module, and the intelligent controller includes
Power circuit, the power circuit be used for selected from the output of current transformer and threephase switch power module all the way and by its
Be converted to the consuming parts in the power supply voltage supplying intelligent controller being adapted；
Housing, for accommodating current transformer, threephase switch power module, intelligent controller.
Preferably, the input of the threephase switch power module is connected with major loop.
Preferably, the intelligent controller also includes：Current signal conditioning circuit, voltage sampling circuit, trip circuit,
LCD display circuit, keyboard circuit, telecommunication circuit, conjunction isloation state input circuit, MCU circuits.
Preferably, the housing is made up of base, middle cover, upper lid, described threephase switch power module and Based Intelligent Control
Device is arranged in middle cover.
Preferably, it is also equipped with transmitting the microswitch of opening and closing state switching signal in the middle cover.
Compared to existing technology, the utility model has the advantages that：
The utility model provides modular built-in threephase switch power supply mould on the basis of current transformer is self-powered
Block, not only can reliably make breaker make correct action under overload, short circuit fault condition, at the same when line current compared with
It is small, when current transformer is not enough to the work capacity needed for providing whole system, can be by the built-in threephase switch power supply of breaker
Module for power supply, thus ensure breaker in all cases can normal work, job stability greatly improves, it is adaptable to various
Failure situation.Further, since built-in threephase switch power module uses independent modularized design, produced beneficial to intelligent breaker
The assembling design of product, can choose whether to install according to the actual conditions of intelligent breaker, and flexibility is higher.
Brief description of the drawings
Fig. 1 is circuit theory schematic diagram of the present utility model；
Fig. 2 is layout structure schematic diagram of the present utility model；
Fig. 3 is layout structure exploded perspective view of the present utility model；
Fig. 4 is pedestal schematic rear view of the present utility model；Fig. 5 is the structured flowchart of intelligent controller；
Fig. 6, Fig. 7 are that the utility model middle cover installs microswitch scheme of installation
Fig. 8 implements circuit for one kind of power circuit；
Fig. 9 implements circuit for one kind of threephase switch power module.
Each label implication is as follows in figure：
1st, intelligent controller, 2, current transformer, 3, ZCT, 4, threephase switch power module, 5, housing, 511,
Pedestal, 512, voltage signal line, 513, first through hole, 52, middle cover, 521, microswitch, 522 second through holes, 523, latch.
Specific embodiment
The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings：
For prior art merely using the deficiency existing for current transformer self-powered, thinking of the present utility model be
The power supply module of built-in module in breaker of plastic casing.Through taking into full account existing conventional power supply module, find to divide
Do not have the following disadvantages：First, single-phase switch power supply, although its compact, but when there is phase shortage phenomenon, it is impossible to circuit is risen
To the effect of protection；2nd, three-phase transformer rectifier power source, it can solve the problems, such as open-phase protection, but volume of transformer is huge, nothing
Method is carried out power supply and minimized, and causes to take the larger space of circuit breaker internal；3rd, freestanding external accessory power supply module,
The program had both increased external power source line, and caused influence to the reliability of power supply.
Therefore, thinking of the present utility model is to increase modular threephase switch power module in breaker of plastic casing, with
Improve the electrical stability of intelligent controller.Have benefited from the fast development of switch power technology, threephase switch power supply at present by
Step realizes miniaturization, can meet the limitation of circuit breaker internal space.Specifically, breaker of plastic casing of the present utility model, including：
Current transformer, extracts for being sampled to main circuit current and from major loop electric energy；
Threephase switch power module, for outside three-phase alternating current to be converted into direct current；
Intelligent controller, it is connected in pluggable mode with the threephase switch power module, and the intelligent controller includes
Power circuit, the power circuit be used for selected from the output of current transformer and threephase switch power module all the way and by its
Be converted to the consuming parts in the power supply voltage supplying intelligent controller being adapted；
Housing, for accommodating current transformer, threephase switch power module, intelligent controller.
Fig. 1 shows basic circuit principle of the present utility model, as shown in figure 1, the breaker of plastic casing includes Based Intelligent Control
Device 1, current transformer 2, ZCT 3, threephase switch power module 4.Threephase switch power module 4 is independent one block of electronics
Wiring board, intelligent controller is one piece or more electronic circuit board, and current transformer 2 and ZCT 3 are combined to leading back
Road electric current is sampled and sampled signal is delivered into intelligent controller 1 and processed, and current transformer 2 is additionally operable to from major loop
Middle extraction electric energy supply intelligent controller 1；Main circuit voltage is directly input into intelligent controller, used as the measurement signal of voltage；
The three-phase major loop that the input of threephase switch power module 4 is protected with breaker is connected, and three-phase alternating current is converted to directly
Intelligent controller 1 is supplied after stream electricity.
Fig. 2,3 show that the utility model is laid out mounting structure figure, and housing 5 is made up of base 51, middle cover 52, upper lid 53,
Described base 51 is by base plate（Not shown in figure）Constituted with pedestal 511, described threephase switch power module and Based Intelligent Control
Device is arranged in middle cover 52.
Such as Fig. 2, shown in 3, current transformer 2, ZCT 3, the bottom for being respectively arranged in plastic case breaker casing 5,
When needing selection to install threephase switch power module 4, the electronic circuit board of threephase switch power module 4 is used into screw first
With the corresponding position of middle cover 52 that the mode of locating slot is arranged on breaker, then with the mode for patching by the electricity of intelligent controller 1
Sub- wiring board is connected with threephase switch power module 4, and the electronic circuit board of intelligent controller 1 then is used into screw and locating slot
Mode be arranged on breaker middle cover 52 in threephase switch power module 4 top, if need not select install threephase switch electricity
During source module 4, by the electronic circuit board of intelligent controller 1 from the electronic circuit board of threephase switch power module 4 with tearing what is pulled out open
Removed in mode, then dismantled from breaker middle cover 52.After now threephase switch power module 4 is installed with intelligent controller 1
Positioned at current transformer 2, the top of ZCT 3.By the perforate on the surface of upper lid 53, can know on intelligent controller 1
The display parameters of liquid crystal display, so as to grasp the real-time working condition of intelligent controller 1, such as electric current, voltage and residual current
Display reading, and various indicating fault after breaker actuation etc. can also be inquired about and modification various parameters by button.
Wherein, intelligent controller 1 can be independent one piece of electronic circuit board, or the multilayer electronic wiring board that stacking is installed.Three-phase
Switch power module 4 use independent one piece of electronic circuit board, and between intelligent controller 1, major loop using be easy to plug
Connected mode, thus can according to breaker protection function select install or dismantle；The utility model is obtained from major loop
Take voltage signal or three-phase alternating current source signal to be obtained by breaker of plastic casing power supply side conductive row, such as Fig. 3, shown in 4, with quadrupole
As a example by breaker, the one end of voltage signal line 512 is provided with plug, and the other end is provided with conducting strip.Voltage signal line 512 is passed through
It is arranged in the groove at the back side of pedestal 511 after first through hole 513 on circuit breaker base 511, then is twisted conducting strip by screw
The back side that pile crown busbar is installed in circuit breaker base 511 is fastened, by screw as intermediary and busbar, conducting strip
Contact makes voltage signal line 512 form conductive path with major loop.Voltage signal line 512 is in the form of plug and threephase switch
Corresponding socket connection on power module 4, thus three phase mains module 4 can obtain three phase mains from major loop.Other intelligence
The voltage measurement signal of energy controller 1 is also derived from.
The structure of intelligent controller is as shown in figure 5, it includes current signal conditioning circuit, voltage sample electricity in the present embodiment
Road, trip circuit, LCD display circuit, keyboard circuit, telecommunication circuit, power circuit, MCU circuits and conjunction isloation state input circuit.
Current transformer, ZCT are respectively current signal, residual current signal the feeding intelligent controller obtained from major loop
Current signal conditioning circuit generate suitable signal after processed by MCU circuits；Voltage sampling circuit is gathered from major loop
The voltage signal of each phase, including over-pressed signal, under-voltage signal, default phase signal and signal off zero feeding MCU circuits are processed；
MCU circuits are according to the current signal of input, residual current signal, voltage signal and default threshold parameter automatic decision and lead to
Cross whether trip circuit control action mechanism performs trip signal；Keyboard circuit is to the setting parameter of breaker, functional status, logical
Letter parameter etc. is modified；LCD display circuit is used to realize the display of malfunction, setting parameter, messaging parameter etc. and refers to
Show；Telecommunication circuit is used to be communicated with host computer, and host computer is given by fault-signal, setting parameter etc., soft by host computer
Part realizes remote measurement, remote regulating, remote signalling, the remote control to breaker；Close isloation state input circuit and receive and connect with circuit-breaker switching on-off state
The switching signal of the microswitch for connecing, feeding MCU circuits are processed.Power circuit is used for from current transformer and threephase switch
The electricity consumption portion in the power supply voltage supplying intelligent controller being adapted is selected all the way and is converted into the output of power module
Part.
As shown in Figure 6,7, the microswitch 521 that can transmit opening and closing state is arranged on breaker middle cover by latch 523
In 52 corresponding second through hole 522.Microswitch 521 is connected by way of lead is patched with conjunction isloation state input circuit, gives
MCU circuits transmit the switching signal of circuit-breaker switching on-off state.
The power circuit is prior art, and it can be randomly choosed all the way from two-way power supply, or according to default preferential
Level is selected successively from high to low, or, the output parameter such as voltage, electric current according to two-way power supply meets default ginseng to gate
Several optimum powers.Fig. 8 is that the one kind for showing power circuit implements circuit, its by electric capacity C1~C8, resistance R1~R5,
Double diode D1, fast recovery pipe D2, inductance L1, DC-DC power source chip N1, reference power supply chip N2, N3 composition.Power circuit is adopted
Powered with two-way power supply, normal work power supply is provided by power supply module, the partial power uses the work of Switching Power Supply
Mode.When short circuit or under-voltage occurs in breaker, using current transformer power supply, it is ensured that power supply is powered uninterruptedly.Power supply core
Piece N1 (preferably model LM5007) is efficient, inexpensive, voltage-dropping type biasing voltage-stablizer easy to use, wherein, electric capacity C1, C4,
C5, C7 strobe, and C2, C6, C8 are decoupling capacitor, and electric capacity C3 redeemings, D2 enters as fly-wheel diode, inductance L1
The storage of row electric energy and conversion, resistance R1 and input voltage VIN are used for determining the ON time of power supply chip N1, resistance R2 and anti-
Feedback terminal voltage FB is used for determining the shut-in time of supply unit, and resistance R3, R4 constitute divider, and R5 is load resistance.Power supply core
Piece N1 and reference voltage chip N2 (preferably using TPS76333), N3 (preferably using REF3025) provided for related circuit 5V,
3.3V, 2.5V operating voltage.
Fig. 9 shows that one kind of threephase switch power module implements circuit, and it includes current limiting pressure-limiting circuit, rectified current
Road, surge absorbing circuit, reduction voltage circuit, feedback circuit, constant voltage circuit, the current limiting pressure-limiting electricity routing resistance 2R1-2R9 compositions,
Described rectification circuit is made up of rectification unit 2D1,2D2,2D3, the surge absorbing circuit by electric capacity 2C1, resistance 2R10,
2D8 is constituted, and the reduction voltage circuit is by voltage-stabiliser tube 2D4,2D5,2D6,2D10, resistance 2R11-2R13, electric capacity 2C2-2C3, metal-oxide-semiconductor
2V1 is constituted, and the feedback circuit is by electric capacity 2C4-2C13, resistance 2R14-2R21, metal-oxide-semiconductor 2V2-2V3, voltage-stabiliser tube 2D7, two poles
Pipe 2D12-2D13, power supply chip 2N1 are constituted, and the constant voltage circuit is by transformer 2T1, Transient Voltage Suppressor 2D9, diode
2D11, electric capacity 2C14-2C15 are constituted.Circuit uses the scheme of Switching Power Supply, the preferred UCC28C41 of switching power source chip 2N1.Three
Phase voltage power supply circuit carries out current limliting, pressure limiting, rectification, surge absoption to the AC power being input into, and carries out guarantor after step-down treatment
Hold the basicly stable of operating voltage VDD.
Claims (5)
1. a kind of breaker of plastic casing, it is characterised in that including：
Current transformer, extracts for being sampled to main circuit current and from major loop electric energy；
Threephase switch power module, is independent one piece of electronic circuit board, for outside three-phase alternating current to be converted into direct current；
Intelligent controller, it is connected in pluggable mode with the threephase switch power module, and the intelligent controller includes power supply
Circuit, the power circuit is used to be selected from the output of current transformer and threephase switch power module all the way and be converted
It is the consuming parts in the power supply voltage supplying intelligent controller that is adapted；
Housing, for accommodating current transformer, threephase switch power module, intelligent controller.
2. breaker of plastic casing as claimed in claim 1, it is characterised in that the input of the threephase switch power module with lead back
Road connects.
3. breaker of plastic casing as claimed in claim 1, it is characterised in that the intelligent controller also includes：Current signal is nursed one's health
Circuit, voltage sampling circuit, trip circuit, LCD display circuit, keyboard circuit, telecommunication circuit, conjunction isloation state input circuit, MCU
Circuit.
4. breaker of plastic casing as claimed in claim 1, it is characterised in that the housing is made up of base, middle cover, upper lid, described
Threephase switch power module is arranged in middle cover with intelligent controller.
5. breaker of plastic casing as claimed in claim 4, it is characterised in that transmission opening and closing state is also equipped with the middle cover and is opened
The microswitch of OFF signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621423064.3U CN206250743U (en) | 2016-12-23 | 2016-12-23 | A kind of breaker of plastic casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621423064.3U CN206250743U (en) | 2016-12-23 | 2016-12-23 | A kind of breaker of plastic casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206250743U true CN206250743U (en) | 2017-06-13 |
Family
ID=59008300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621423064.3U Active CN206250743U (en) | 2016-12-23 | 2016-12-23 | A kind of breaker of plastic casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206250743U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109119297A (en) * | 2018-10-15 | 2019-01-01 | 浙江天正电气股份有限公司 | A kind of leakage protection structure of breaker of plastic casing |
| CN109450101A (en) * | 2018-12-28 | 2019-03-08 | 深圳市厚沃电气科技有限公司 | A kind of control device for low-pressure plastic shell circuit breaker |
| CN111812495A (en) * | 2020-06-23 | 2020-10-23 | 上海电器科学研究所（集团）有限公司 | Electric quantity monitoring accessory for direct current molded case circuit breaker |
-
2016
- 2016-12-23 CN CN201621423064.3U patent/CN206250743U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109119297A (en) * | 2018-10-15 | 2019-01-01 | 浙江天正电气股份有限公司 | A kind of leakage protection structure of breaker of plastic casing |
| CN109450101A (en) * | 2018-12-28 | 2019-03-08 | 深圳市厚沃电气科技有限公司 | A kind of control device for low-pressure plastic shell circuit breaker |
| CN111812495A (en) * | 2020-06-23 | 2020-10-23 | 上海电器科学研究所（集团）有限公司 | Electric quantity monitoring accessory for direct current molded case circuit breaker |
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