CN103366460A - Circuit breaker for prepaid electric meter - Google Patents

Circuit breaker for prepaid electric meter Download PDF

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Publication number
CN103366460A
CN103366460A CN 201310295697 CN201310295697A CN103366460A CN 103366460 A CN103366460 A CN 103366460A CN 201310295697 CN201310295697 CN 201310295697 CN 201310295697 A CN201310295697 A CN 201310295697A CN 103366460 A CN103366460 A CN 103366460A
Authority
CN
China
Prior art keywords
circuit
hour meter
paying kilowatt
isolating switch
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN 201310295697
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Chinese (zh)
Inventor
余存泰
赵东杰
彭昆明
李其利
杨晓红
黎永胜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CNC Electric Group Co Ltd
Original Assignee
CNC Electric Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CNC Electric Group Co Ltd filed Critical CNC Electric Group Co Ltd
Priority to CN 201310295697 priority Critical patent/CN103366460A/en
Publication of CN103366460A publication Critical patent/CN103366460A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a circuit breaker for a prepaid electric meter, which comprises a power supply circuit, and further comprises a delayed trip circuit, a voltage detection circuit and an electric meter detection circuit, wherein the delayed trip circuit is respectively connected with the power supply circuit and the voltage detection circuit, and the electric meter detection circuit is connected with the voltage detection circuit. The circuit breaker is high in system safety, high in reliability, simple in overall circuit design, and strong in resistance to electromagnetic compatibility features, and is more in line with the actual requirement of a user.

Description

A kind of isolating switch for pre-paying kilowatt-hour meter
Technical field
The present invention relates to a kind of isolating switch, more particularly, relate to a kind of isolating switch for pre-paying kilowatt-hour meter.
Background technology
Along with deepening constantly of national grid transformation, the use of this electric power meter of pre-paying kilowatt-hour meter is also more and more universal, and people's electricity consumption idea also changes thereupon, and the consumption pattern of purchasing first the rear electricity consumption of electricity has begun to enter people's life.But existing pre-paying kilowatt-hour meter definite purpose circuit breaker is by judging the voltage signal of ammeter signal detection line, circuit breaker tripping when its magnitude of voltage is lower than a certain particular value.Because the voltage signal of ammeter signal detection line is identical with supply voltage, namely when supply voltage former thereby cause decompression or when under-voltage because of certain, the voltage signal of ammeter signal detection line is also with its reduction, causing the pre-paying kilowatt-hour meter definite purpose circuit breaker is not because of the electric supply meter arrearage and false tripping, and it is very inconvenient to bring to user's use; Because the delayed releasing circuit of existing pre-paying kilowatt-hour meter definite purpose circuit breaker generally adopts the form of series connection, because electrical apparatus release L1 is connected on and is in the long-term work state in the circuit, greatly reduce the basic demand that product reliability and security are used simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is, said system security for prior art is low, reliability is low, when supply voltage former thereby cause decompression or when under-voltage because of certain, the voltage signal of ammeter signal detection line is also with its reduction, causing the pre-paying kilowatt-hour meter definite purpose circuit breaker is not because of the electric supply meter arrearage and false tripping, bring very inconvenient defective to user's use, a kind of isolating switch for pre-paying kilowatt-hour meter is provided, comprise: power circuit, described isolating switch for pre-paying kilowatt-hour meter also comprises:
The delayed releasing circuit;
Voltage detecting circuit;
The ammeter signal deteching circuit;
Wherein, described delayed releasing circuit links to each other with described power circuit, voltage detecting circuit respectively, and described ammeter signal deteching circuit links to each other with described voltage detecting circuit.
At the isolating switch for pre-paying kilowatt-hour meter of the present invention, described delayed releasing circuit is by diode D2, D3, resistance R 6, R7, and capacitor C 2, C3, controllable silicon Q1 and electrical apparatus release L1 form.
At the isolating switch for pre-paying kilowatt-hour meter of the present invention, described voltage detecting circuit is comprised of divider resistance R3, R4 and transistor Q2.
At the isolating switch for pre-paying kilowatt-hour meter of the present invention, described ammeter signal deteching circuit is by resistance R 1, R2, diode D5, and capacitor C 1 and transistor Q3 form.
At the isolating switch for pre-paying kilowatt-hour meter of the present invention, described power circuit is comprised of voltage dependent resistor (VDR) RV1, commutation diode D1, current-limiting resistance R5 and voltage stabilizing diode D4.
Implement the isolating switch for pre-paying kilowatt-hour meter of the present invention, have following beneficial effect: security of system is high, and reliability is high, and whole circuit design is simple, and anti-electromagnetic compatibility characteristic is strong, more meets user's actual demand.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the embodiment synoptic diagram that is used for the isolating switch of pre-paying kilowatt-hour meter in the prior art;
Fig. 2 is the synoptic diagram that the present invention is used for isolating switch one embodiment of pre-paying kilowatt-hour meter.
Embodiment
See also Fig. 1, for being used for the embodiment synoptic diagram of the isolating switch of pre-paying kilowatt-hour meter in the prior art.As shown in Figure 1, existing pre-paying kilowatt-hour meter definite purpose circuit breaker is by judging the voltage signal of ammeter signal detection line, circuit breaker tripping when its magnitude of voltage is lower than a certain particular value.Because the voltage signal of ammeter signal detection line is identical with supply voltage, namely when supply voltage former thereby cause decompression or when under-voltage because of certain, the voltage signal of ammeter signal detection line is also with its reduction, causing the pre-paying kilowatt-hour meter definite purpose circuit breaker is not because of the electric supply meter arrearage and false tripping, and it is very inconvenient to bring to user's use; Simultaneously because the delayed releasing circuit of existing pre-paying kilowatt-hour meter definite purpose circuit breaker generally adopts the form of series connection.
Please in conjunction with consulting Fig. 2, be the synoptic diagram of invention for an embodiment of the isolating switch of pre-paying kilowatt-hour meter.As shown in Figure 2, at least comprise power circuit, the delayed releasing circuit, voltage detecting circuit, the ammeter signal deteching circuit, wherein, described delayed releasing circuit links to each other with described power circuit, voltage detecting circuit respectively, and described ammeter signal deteching circuit links to each other with described voltage detecting circuit.Voltage detecting circuit is comprised of divider resistance R3, R4 and transistor Q2, and the arrearage of false judgment ammeter causes the isolating switch false tripping because supply voltage reduces to avoid the pre-paying kilowatt-hour meter definite purpose circuit breaker; Power circuit is comprised of voltage dependent resistor (VDR) RV1, commutation diode D1, current-limiting resistance R5 and voltage stabilizing diode D4; The delayed releasing circuit is by diode D2, D3, resistance R 6, R7, capacitor C 2, C3, controllable silicon Q1 and electrical apparatus release L1 form, avoid traditional tandem type delayed releasing circuit, because electrical apparatus release is connected on and is in long-term "on" position in the circuit, cause product reliability and security to reduce; The ammeter signal deteching circuit is by resistance R 1, R2, diode D5, and capacitor C 1 and transistor Q3 form.
Design by one embodiment of the invention, has following beneficial effect: one, adopt voltage detecting circuit, can effectively solve supply voltage because of certain former thereby decompression or when under-voltage, cause the pre-paying kilowatt-hour meter definite purpose circuit breaker not to be and thread off because of the trip signal that the electric supply meter arrearage is sent, it is very inconvenient to bring to user's use; Two, adopt parallel connection type delayed releasing circuit can effectively solve existing tandem type delayed releasing circuit because the long-term energising of electrical apparatus release causes reliability and the low defective of security; Whole circuit design is simple, and anti-electromagnetic compatibility characteristic is strong, more meets user's actual demand.
The present invention is described according to specific embodiment, but it will be understood by those skilled in the art that when not breaking away from the scope of the invention, can carry out various variations and be equal to replacement.In addition, for adapting to the specific occasion of the technology of the present invention, can carry out many modifications and not break away from its protection domain the present invention.Therefore, the present invention is not limited to specific embodiment disclosed herein, and comprises that all drop into the embodiment of claim protection domain.

Claims (5)

1. isolating switch that is used for pre-paying kilowatt-hour meter, comprising: power circuit is characterized in that described isolating switch for pre-paying kilowatt-hour meter also comprises:
The delayed releasing circuit;
Voltage detecting circuit;
The ammeter signal deteching circuit;
Wherein, described delayed releasing circuit links to each other with described power circuit, voltage detecting circuit respectively, and described ammeter signal deteching circuit links to each other with described voltage detecting circuit.
2. the isolating switch for pre-paying kilowatt-hour meter according to claim 1 is characterized in that, described delayed releasing circuit is by diode D2, D3, resistance R 6, R7, and capacitor C 2, C3, controllable silicon Q1 and electrical apparatus release L1 form.
3. the isolating switch for pre-paying kilowatt-hour meter according to claim 1 is characterized in that, described voltage detecting circuit is comprised of divider resistance R3, R4 and transistor Q2.
4. the isolating switch for pre-paying kilowatt-hour meter according to claim 2 is characterized in that, described ammeter signal deteching circuit is by resistance R 1, R2, diode D5, and capacitor C 1 and transistor Q3 form.
5. according to claim 1 to 4 each described isolating switchs for pre-paying kilowatt-hour meter, it is characterized in that described power circuit is comprised of voltage dependent resistor (VDR) RV1, commutation diode D1, current-limiting resistance R5 and voltage stabilizing diode D4.
CN 201310295697 2013-07-15 2013-07-15 Circuit breaker for prepaid electric meter Pending CN103366460A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201310295697 CN103366460A (en) 2013-07-15 2013-07-15 Circuit breaker for prepaid electric meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201310295697 CN103366460A (en) 2013-07-15 2013-07-15 Circuit breaker for prepaid electric meter

Publications (1)

Publication Number Publication Date
CN103366460A true CN103366460A (en) 2013-10-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201310295697 Pending CN103366460A (en) 2013-07-15 2013-07-15 Circuit breaker for prepaid electric meter

Country Status (1)

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CN (1) CN103366460A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104268993A (en) * 2014-10-22 2015-01-07 长城电器集团有限公司 Special breaker circuit for miniature prepaid electricity meter
CN104574677A (en) * 2015-01-28 2015-04-29 长城电器集团有限公司 Special-purpose automatic reclosing lock breaker circuit for small prepaid electric meter
CN104578003A (en) * 2015-01-28 2015-04-29 长城电器集团有限公司 Small residual current circuit breaker circuit having overvoltage protection function
CN104578002A (en) * 2015-01-28 2015-04-29 长城电器集团有限公司 Minitype residual current circuit breaker protective circuit
CN111474422A (en) * 2019-01-24 2020-07-31 上海复旦微电子集团股份有限公司 Ground fault protection system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104268993A (en) * 2014-10-22 2015-01-07 长城电器集团有限公司 Special breaker circuit for miniature prepaid electricity meter
CN104574677A (en) * 2015-01-28 2015-04-29 长城电器集团有限公司 Special-purpose automatic reclosing lock breaker circuit for small prepaid electric meter
CN104578003A (en) * 2015-01-28 2015-04-29 长城电器集团有限公司 Small residual current circuit breaker circuit having overvoltage protection function
CN104578002A (en) * 2015-01-28 2015-04-29 长城电器集团有限公司 Minitype residual current circuit breaker protective circuit
CN111474422A (en) * 2019-01-24 2020-07-31 上海复旦微电子集团股份有限公司 Ground fault protection system

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Application publication date: 20131023