CN207133332U - A kind of external breaker of electric energy meter with automatic divide-shut brake function - Google Patents

Abstract

The utility model discloses a kind of external breaker of electric energy meter with automatic divide-shut brake function; including breaker, D/A converting circuit, DC voltage rectification circuit, surge protection circuit, filter circuit, piezo-resistance, MCU processing units, electric-motor drive unit series connection and sample circuit; the breaker is connected on sample circuit; sample circuit is made up of diode V6, resistance R10, resistance R11 and diode V7, resistance R10 and resistance R11 series connection.This has external breaker of electric energy meter of automatic divide-shut brake function, functionally more intelligent than existing product, and external breaker has automatically and manual mode, can be operated by hand, facilitate field adjustable step；External breaker has the advantages that breaking capacity is high, and bearing capacity is strong；User power utilization security is provided significantly；The design can do 125A nominal loads, and this is that existing product is unable to reach.

Description

A kind of external breaker of electric energy meter with automatic divide-shut brake function

Technical field

Electric equipment applied technical field is the utility model is related to, specifically a kind of electric energy with automatic divide-shut brake function Off-balancesheet puts breaker.

Background technology

Prepayment meter, which is called, does quantitative electric energy meter, IC card electric energy meter, except the function of measuring with common electric energy meter Outside, specifically user first buys electricity, buys ability electricity consumption after electricity, user does not continue to buy electricity after being finished electricity, then automatically cuts off power supply and stop Only power；Current this electric energy meter is all built-in circuit breaker type, and built-in breaker has the advantages that easy for installation, wiring is simple, But because the rated current of breaker built in volumetric constraint can not be made big, can only small 80A, and breaking capacity can not expire Foot requires, inner contact adhesion easily occurs, greatly reduces electrical safety, and above-mentioned factor seriously restricts national grid development Strategy.

Utility model content

The purpose of this utility model is to provide a kind of external breaker of electric energy meter with automatic divide-shut brake function, convenient Field adjustable step；External breaker has the advantages that breaking capacity is high, and bearing capacity is strong；User power utilization peace is provided significantly Quan Xing；To solve the problems mentioned in the above background technology.

To achieve the above object, the utility model provides following technical scheme：

A kind of external breaker of electric energy meter with automatic divide-shut brake function, including breaker, D/A converting circuit, direct current Voltage rectifying circuit, surge protection circuit, filter circuit, piezo-resistance, MCU processing units, electric-motor drive unit are connected and adopted Sample circuit, the breaker are connected on sample circuit, and sample circuit has diode V6, resistance R10, resistance R11 and diode V7 is formed, and resistance R10 and resistance R11 series connection, the resistance R10 other end are connected to diode V6 cathode terminal, resistance R11 and two Pole pipe V7 cathode terminal connection；MCU processing units and the electric-motor drive unit series connection, MCU processing units and motor driving are single Member is connected with D/A converter module, and execution unit, MUC processing units output feedback letter are connected with electric-motor drive unit Number, control signal detection is electrically connected on MCU processing units, and execution unit is connected with breaker by wire；The digital-to-analogue Change-over circuit is made up of high tension protection circuit, DC voltage rectification circuit, surge protection circuit and filter circuit, high voltage protective electricity Diode D1, D2 and electric capacity C4 compositions are route, diode D1, D2 differential concatenation, electric capacity C4 is connected on diode D2 anode tap, High tension protection circuit is connected on 5/6 terminal of transformer, and 3 terminals of transformer pass through wired earth；The direct current repoussage Current circuit is made up of inductance LC, electric capacity C1, electric capacity CP3 and electric capacity CP4, and inductance LC, electric capacity C1, electric capacity CP3 and electric capacity CP4 are mutual Even, electric capacity CP4 positive terminal is connected with high-precision voltage stabilizing diode, one end series connection photoelectricity coupling of high-precision voltage stabilizing diode for parallel connection Clutch；The surge protection circuit and filter circuit are in series, the resistance R21 and R22 in surge protection circuit, resistance R21 and R22 is in parallel, resistance R21 and R22 both ends parallel connection piezo-resistance；The piezo-resistance is connected in parallel on control signal detection circuit Input, diode V8 and V11 are connected on the both ends of piezo-resistance, diode V8 cathode terminal and the sun of light emitting diode respectively Extreme connection, the cathode terminal of light emitting diode are connected with diode V11 anode tap, and light emitting diode is in parallel with metal-oxide-semiconductor, MOS The collector series resistance R14 of pipe, its emitter stage are connected with diode V5 anode, and both common ports to wire by connecing Ground.

As further program of the utility model：The D/A converting circuit uses LKL363 analog-digital chips, The LN ends of analog-digital chip are connected to the input of power network.

As further program of the utility model：The MCU processing units are internally integrated STC15W202S single-chip microcomputers, Pull-up resistor R14 is connected on the SIGNB interfaces of single-chip microcomputer.

As further program of the utility model：The sample circuit uses electric resistance partial pressure type structure, resistance R11 and two Shunt capacitance C12 between pole pipe V7, electric capacity C12 other end ground connection.

As further program of the utility model：The light emitting diode and metal-oxide-semiconductor are integrated in photoelectrical coupler U10's Inside, photoelectrical coupler U10 model P817.

Compared with prior art, the utility model beneficial effect：

（1）This has the external breaker of electric energy meter of automatic divide-shut brake function, and D/A converting circuit uses LKL363 numbers Mould conversion chip, the LN ends of analog-digital chip are connected to the input of power network, and regulation is simple, low in energy consumption, the security of circuit It can greatly improve；MCU processing units are internally integrated STC15W202S single-chip microcomputers, and pull-up is connected on the SIGNB interfaces of single-chip microcomputer Resistance R14, SINGB are to continue high potential, so as to check whether there is signal input；Sample circuit uses electric resistance partial pressure type structure, Shunt capacitance C12 between resistance R11 and diode V7, electric capacity C12 other end ground connection, done primarily to providing overall resisting Immunity energy；Light emitting diode and metal-oxide-semiconductor are integrated in photoelectrical coupler U10 inside, photoelectrical coupler U10 model P817, State, easy access and observation are prompted for the work of circuit.

（2）This has the external breaker of electric energy meter of automatic divide-shut brake function, facilitates field adjustable step；External open circuit Utensil has the advantages that breaking capacity is high, and bearing capacity is strong；User power utilization security is provided significantly.

Brief description of the drawings

Fig. 1 is circuit connection diagram of the present utility model；

Fig. 2 is D/A converting circuit figure of the present utility model；

Fig. 3 is input sampling circuit figure of the present utility model；

Fig. 4 is that control signal of the present utility model detects circuit diagram.

In figure：1- breakers, 2- D/A converting circuits, 21- high-precision voltage stabilizings pipe, 22- photoelectrical couplers, 23- high pressures are protected Protection circuit, 24- transformers, 25- DC voltages rectification circuit, 26- surge protection circuits, 27- filter circuits, the inspection of 3- control signals Slowdown monitoring circuit, 31- piezo-resistances, 32- light emitting diodes, 33-MOS pipes, the driving of 4- feedback signals, 5-MCU processing units, 6- motors Simple eye, 7- execution units, 8- sample circuits.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.

Refer to Fig. 1-4, in the utility model embodiment, a kind of external open circuit of electric energy meter with automatic divide-shut brake function Device, including breaker 1, D/A converting circuit 2, DC voltage rectification circuit 25, surge protection circuit 26, filter circuit 27, pressure Quick resistance 31, MCU processing units 5, electric-motor drive unit 6 are connected and sample circuit 8, breaker 1 are connected on sample circuit 8, Sample circuit 8 is made up of diode V6, resistance R10, resistance R11 and diode V7, resistance R10 and resistance R11 series connection, resistance The R10 other end is connected to diode V6 cathode terminal, and resistance R11 is connected with diode V7 cathode terminal；MCU processing units 5 Connected with electric-motor drive unit 6, MCU processing units 5 and electric-motor drive unit 6 are connected with D/A converter module 2, and motor drives Execution unit 7, the output feedback signal 4 of MUC processing units 5 are connected with moving cell 6, control signal detection circuit 3 is connected to MCU On processing unit 5, execution unit 7 is connected with breaker 1 by wire；MCU processing units 5 to be internally integrated STC15W202S mono- Piece machine, it is to continue high potential that pull-up resistor R14, SINGB are connected on the SIGNB interfaces of single-chip microcomputer, so as to check whether there is signal Input；D/A converting circuit 2 is by high tension protection circuit 23, DC voltage rectification circuit 25, surge protection circuit 26 and filtered electrical Road 27 is formed, and high tension protection circuit 23 is made up of diode D1, D2 and electric capacity C4, and D/A converting circuit 2 uses LKL363 numbers Mould conversion chip, the LN ends of analog-digital chip are connected to the input of power network, and regulation is simple, low in energy consumption, the security of circuit It can greatly improve；Diode D1, D2 differential concatenation, electric capacity C4 are connected on diode D2 anode tap, and high tension protection circuit 23 connects It is connected on 5/6 terminal of transformer 24,3 terminals of transformer 24 pass through wired earth；DC voltage rectification circuit 25 is by inductance LC, electric capacity C1, CP3 and CP4 composition, inductance LC, electric capacity C1, electric capacity CP3 and electric capacity CP4 are parallel with one another, electric capacity CP4 positive terminal It is connected with high-precision voltage stabilizing diode 21, one end series connection photoelectrical coupler 22 of high-precision voltage stabilizing diode 21；Surge protection electricity Road 26 and filter circuit 27 are in series, and providing exchange for circuit turns direct current effect, and removes filtering interference, surge protection circuit 26 Interior resistance R21 and R22, resistance R21 and R22 are in parallel, resistance R21 and R22 both ends parallel connection piezo-resistance 31；Light-emitting diodes Pipe 32 and metal-oxide-semiconductor 33 are integrated in photoelectrical coupler U10 inside, photoelectrical coupler U10 model P817, for the work of circuit Prompting state, easy access and observation, piezo-resistance 31 be connected in parallel on control signal detection circuit 3 input, diode V8 and V11 is connected on the both ends of piezo-resistance 31 respectively, and diode V8 cathode terminal is connected with the anode tap of light emitting diode 32, lights The cathode terminal of diode 32 is connected with diode V11 anode tap, and light emitting diode 32 is in parallel with metal-oxide-semiconductor 33, the collection of metal-oxide-semiconductor 33 Electrode Series Resistance R14, its emitter stage are connected with diode V5 anode, and both common ports are by wired earth；Sampling Circuit 8 uses electric resistance partial pressure type structure, and shunt capacitance C12 between resistance R11 and diode V7, electric capacity the C12 other end are grounded, Primarily to provide overall interference free performance.

It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation Involved claim.

Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It is appreciated that other embodiment.

Claims (5)

1. a kind of external breaker of electric energy meter with automatic divide-shut brake function, including breaker（1）, D/A converting circuit（2）、 DC voltage rectification circuit（25）, surge protection circuit（26）, filter circuit（27）, piezo-resistance（31）, MCU processing units （5）, electric-motor drive unit（6）Series connection and sample circuit（8）, it is characterised in that：The breaker（1）It is connected to sample circuit （8）On, sample circuit（8）It is made up of diode V6, resistance R10, resistance R11 and diode V7, resistance R10 and resistance R11 strings Connection, the resistance R10 other end are connected to diode V6 cathode terminal, and resistance R11 is connected with diode V7 cathode terminal；It is described MCU processing units（5）And electric-motor drive unit（6）Series connection, MCU processing units（5）And electric-motor drive unit（6）Turn with digital-to-analogue Change circuit（2）It is connected, electric-motor drive unit（6）On be connected with execution unit（7）, MUC processing units（5）Output feedback signal （4）, control signal inspection circuit（3）It is connected on MCU processing units, execution unit（7）With breaker（1）Connected by wire Connect；The D/A converting circuit（2）By high tension protection circuit（23）, DC voltage rectification circuit（25）, surge protection circuit （26）And filter circuit（27）Composition, high tension protection circuit（23）By diode（D1、D2）Formed with electric capacity C4, diode（D1、 D2）Differential concatenation, electric capacity C4 are connected on diode D2 anode tap, high tension protection circuit（23）It is connected to transformer（24）5/ On 6 terminals, transformer（24）3 terminals pass through wired earth；The DC voltage rectification circuit（25）By inductance LC, electric capacity C1, electric capacity CP3 and electric capacity CP4 compositions, inductance LC, electric capacity C1, electric capacity CP3 and electric capacity CP4 companies parallel with one another, electric capacity CP4 is just Extremely it is connected with high-precision voltage stabilizing diode（21）, high-precision voltage stabilizing diode（21）One end series connection photoelectrical coupler（22）； The surge protection circuit（26）And filter circuit（27）It is in series, surge protection circuit（26）Interior resistance R21 and R22, electricity Resistance R21 and R22 is in parallel, resistance R21 and R22 both ends parallel connection piezo-resistance RX1；The piezo-resistance（31）It is connected in parallel on control Signal check circuit（3）Input, diode V8 and V11 are connected on piezo-resistance RX1 both ends, diode V8 the moon respectively Extremely and light emitting diode（32）Anode tap connection, light emitting diode（32）Cathode terminal and diode V11 anode tap connect Connect, light emitting diode（32）With metal-oxide-semiconductor（33）Parallel connection, metal-oxide-semiconductor（33）Collector series resistance R14, its emitter stage and two poles Pipe V5 anode connection, both common ports are by wired earth.

A kind of 2. external breaker of electric energy meter with automatic divide-shut brake function according to claim 1, it is characterised in that： The D/A converting circuit（2）Use LKL363 analog-digital chips, the LN ends of analog-digital chip are connected to the defeated of power network Enter end.

3. the external breaker of a kind of electric energy meter with automatic divide-shut brake function according to claim 1 is a kind of, its feature It is：The MCU processing units（5）Be internally integrated STC15W202S single-chip microcomputers, pull-up is connected on the SIGNB interfaces of single-chip microcomputer Resistance R14.

A kind of 4. external breaker of electric energy meter with automatic divide-shut brake function according to claim 1, it is characterised in that： The sample circuit（8）Using electric resistance partial pressure type structure, shunt capacitance C12 between resistance R11 and diode V7, electric capacity C12's The other end is grounded.

A kind of 5. external breaker of electric energy meter with automatic divide-shut brake function according to claim 1, it is characterised in that： The light emitting diode（32）And metal-oxide-semiconductor（33）It is integrated in photoelectrical coupler U10 inside, photoelectrical coupler U10 model P817。