CN203589692U - Circuit of miniature residual current circuit breaker - Google Patents

Circuit of miniature residual current circuit breaker Download PDF

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Publication number
CN203589692U
CN203589692U CN201320616711.2U CN201320616711U CN203589692U CN 203589692 U CN203589692 U CN 203589692U CN 201320616711 U CN201320616711 U CN 201320616711U CN 203589692 U CN203589692 U CN 203589692U
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CN
China
Prior art keywords
circuit
residual current
resistance
control unit
current detection
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.)
Expired - Fee Related
Application number
CN201320616711.2U
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Chinese (zh)
Inventor
余存泰
赵东杰
彭昆明
黎永胜
李其利
杨晓红
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
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CNC Electric Group Co Ltd
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Priority to CN201320616711.2U priority Critical patent/CN203589692U/en
Application granted granted Critical
Publication of CN203589692U publication Critical patent/CN203589692U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a circuit of a miniature residual current circuit breaker. The circuit of the miniature residual current circuit breaker comprises a power supply circuit, and is characterized by also comprising a residual current signal conditioning circuit, a residual current detection control unit, a residual current detection control unit required circuit, a residual current testing circuit and a tripping circuit, wherein the residual current signal conditioning circuit, the residual current detection control unit, the residual current detection control unit required circuit, the residual current testing circuit and the tripping circuit are connected in sequence. According to the circuit of the miniature residual current circuit breaker provided by the utility model, the temperature rise of a dropping resistor is reduced, and the product reliability is improved; the problem that false tripping phenomenon can be easily caused due to the fact that the pulse packet resistance of a product is low when no external voltage stabilizing circuit exists is solved. The whole circuit of the miniature residual current circuit breaker is simple in design, strong in EMC (electromagnetic compatibility) resistance, high in reliability, and more suitable for meeting actual demands of the miniature residual current circuit breaker.

Description

Small-sized residual current circuit breaker circuit
Technical field
The utility model relates to breaker circuit field, more particularly, relates to a kind of small-sized residual current circuit breaker circuit.
Background technology
In the power circuit of small-sized residual current circuit breaker, generally adopt at present the form of full-wave rectification and resistance step-down, because its VD of full-wave rectifying circuit approximates 0.9 times of AC-input voltage; Simultaneously for coordinating the operating current of residual current detection unit and the requirement of product structure volume, resistance reduction voltage circuit cannot adopt dropping resistor high-power, large resistance, general method is to adopt the method for two resistance series connection to reduce temperature rise, so that dropping resistor temperature rise ratio when normal work is higher, thereby reduce the reliability of whole circuit working; Simultaneously due to without external voltage stabilizing circuit, and only adopt the voltage stabilizing circuit of residual current detection control unit inside, cause the ability of the anti-impulse train interference of product, easily produce false tripping phenomenon.
Utility model content
The technical problems to be solved in the utility model is, the ability of disturbing for the anti-impulse train of the said goods of prior art, easily produce the defect of dropping resistor temperature rise in false tripping phenomenon and power circuit, a kind of small-sized residual current circuit breaker circuit is provided, at least comprise: power circuit; Residual current signal conditioning circuit; Residual current detection control unit; The required circuit of residual current detection control unit; Residual current hookup; Trip circuit; Wherein, described residual current signal conditioning circuit, residual current detection control unit, the required circuit of residual current detection control unit, residual current hookup, trip circuit are connected successively.
In small-sized residual current circuit breaker circuit described in the utility model, described residual current signal conditioning circuit is by resistance R 3, R4, R5, and capacitor C 2, C6, C8, C9 and diode D4 form; Resistance R 3, R4, R5 are connected in series, and capacitor C 6, C8, C9 are connected in series, and capacitor C 2 is connected in series between resistance R 4 and resistance R 5, and diode D4 and resistance R 3 are connected in parallel.
In small-sized residual current circuit breaker circuit described in the utility model, described power circuit is comprised of surge restraint circuit, half-wave rectifying circuit, resistance reduction voltage circuit, external voltage stabilizing circuit, filter circuit and release; Wherein said surge restraint circuit consists of piezo-resistance MYR1, half-wave rectifying circuit consists of diode D1, and resistance reduction voltage circuit consists of resistance R 2, and external voltage stabilizing circuit consists of voltage stabilizing didoe D2, filter circuit consists of capacitor C 1, and release is comprised of release Trip.
In small-sized residual current circuit breaker circuit described in the utility model, described residual current detection control unit is comprised of residual current detection integrated circuit U1.
In small-sized residual current circuit breaker circuit described in the utility model, described residual current hookup is comprised of resistance R 1.
In small-sized residual current circuit breaker circuit described in the utility model, described trip circuit is by controllable silicon D3, and resistance R 6 and capacitor C 5, C7 form.
In small-sized residual current circuit breaker circuit described in the utility model, described residual current detection integrated circuit U1 refers to VG54123.
In small-sized residual current circuit breaker circuit described in the utility model, the required circuit of described residual current detection control unit is comprised of capacitor C 3, C4; Capacitor C 3 is connected with the pin 6 of described residual current detection integrated circuit U1; Capacitor C 4 is connected with pin 4, the pin 5 of described residual current detection integrated circuit U1.
In small-sized residual current circuit breaker circuit described in the utility model, it is characterized in that, between the pin 1 of described residual current detection integrated circuit U1, pin 2, be connected to capacitor C 2; Between the pin 3 of described residual current detection integrated circuit U1, pin 8, be connected to capacitor C 1.
Implement small-sized residual current circuit breaker circuit of the present utility model, there is following beneficial effect: reduce the temperature rise of dropping resistor in power circuit, improved the reliability of product; Low, the phenomenon that easily causes false tripping of the ability of the anti-impulse train of product while avoiding without external voltage stabilizing circuit, simple, the anti-EMC performance of whole circuit design is strong and reliability is high, more meets the actual demand of small-sized residual current circuit breaker.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is prior art small-sized residual current circuit breaker power circuit principle figure;
Fig. 2 is the utility model small-sized residual current circuit breaker circuit theory diagrams.
Embodiment
Refer to Fig. 1, Fig. 1 is prior art small-sized residual current circuit breaker power circuit principle figure.As shown in Figure 1, generally adopt the form of full-wave rectification and resistance step-down in prior art, its defect is: dropping resistor temperature rise ratio when normal work is higher, thereby reduces the reliability of whole circuit working; Due to without external voltage stabilizing circuit, and only adopt the voltage stabilizing circuit of residual current detection control unit inside, the ability that causes the anti-impulse train of product to disturb, easily produces false tripping phenomenon.
Refer to Fig. 2, Fig. 2 is the utility model small-sized residual current circuit breaker circuit theory diagrams.As shown in Figure 2, a kind of small-sized residual current circuit breaker circuit, comprising: power circuit, also comprises: residual current signal conditioning circuit; Residual current detection control unit; The required circuit of residual current detection control unit; Residual current hookup; Trip circuit; Wherein, described residual current signal conditioning circuit, residual current detection control unit, the required circuit of residual current detection control unit, residual current hookup, trip circuit are connected successively.
Preferably, described residual current signal conditioning circuit is by resistance R 3, R4, R5, and capacitor C 2, C6, C8, C9 and diode D4 form; Resistance R 3, R4, R5 are connected in series, and capacitor C 6, C8, C9 are connected in series, and capacitor C 2 is connected in series between resistance R 4 and resistance R 5, and diode D4 and resistance R 3 are connected in parallel.
Preferably, described power circuit is comprised of surge restraint circuit, half-wave rectifying circuit, resistance reduction voltage circuit, external voltage stabilizing circuit, filter circuit and release; Wherein said surge restraint circuit consists of piezo-resistance MYR1, half-wave rectifying circuit consists of diode D1, and resistance reduction voltage circuit consists of resistance R 2, and external voltage stabilizing circuit consists of voltage stabilizing didoe D2, filter circuit consists of capacitor C 1, and release is comprised of release Trip.
Preferably, described residual current detection control unit is comprised of residual current detection integrated circuit U1.
Preferably, described residual current hookup is comprised of resistance R 1.
Preferably, in described small-sized residual current circuit breaker circuit, described trip circuit is by controllable silicon D3, and resistance R 6 and capacitor C 5, C7 form.
Preferably, described small-sized residual current circuit breaker circuit, described residual current detection integrated circuit U1 refers to VG54123.
Preferably, described residual current detection control unit circuit is comprised of capacitor C 3, C4; Capacitor C 3 is connected with the pin 6 of described residual current detection integrated circuit U1; Capacitor C 4 is connected with pin 4, the pin 5 of described residual current detection integrated circuit U1.
Preferably, between the pin 1 of described residual current detection integrated circuit U1, pin 2, be connected to capacitor C 2; Between the pin 3 of described residual current detection integrated circuit U1, pin 8, be connected to capacitor C 1.
Unique distinction of the present utility model is the form of halfwave rectifier, adopts external voltage stabilizing circuit simultaneously.
The utility model is by the design of above schematic diagram, its beneficial effect is: one, rectification circuit in the power circuit of the utility model small-sized residual current circuit breaker adopts the form of halfwave rectifier, its VD approximates 0.45 times of AC-input voltage, the input voltage that makes whole resistance reduction voltage circuit reduces approximately half than the reduction voltage circuit in current common small sized residual current circuit breaker power circuit, so do not need to adopt high-power, the dropping resistor of large resistance, do not need the method for two resistance series connection to reduce the temperature rise that resistance heating produces yet, not only simplify the design of circuit, and greatly reduce the temperature rise of dropping resistor, improved the reliability of product, while two, adopting external voltage stabilizing circuit greatly to improve without external voltage stabilizing circuit, the ability of the anti-impulse train of product is low, easily causes the phenomenon of false tripping, three, simple, the anti-EMC performance of whole circuit design is strong and reliability is high, more meets the actual demand of small-sized residual current circuit breaker.
The utility model is described according to specific embodiment, but it will be understood by those skilled in the art that when not departing from the utility model scope, can carry out various variations and be equal to replacement.In addition,, for adapting to the specific occasion of the utility model technology, can carry out many modifications and not depart from its protection range the utility model.Therefore, the utility model is not limited to specific embodiment disclosed herein, and comprises all embodiment that drop into claim protection range.

Claims (7)

1. a small-sized residual current circuit breaker circuit, comprising: power circuit, it is characterized in that, and described small-sized residual current circuit breaker circuit also comprises:
Residual current signal conditioning circuit;
Residual current detection control unit;
The required circuit of residual current detection control unit;
Residual current hookup;
Trip circuit;
Wherein, described residual current signal conditioning circuit, residual current detection control unit, the required circuit of residual current detection control unit, residual current hookup, trip circuit are connected successively.
2. small-sized residual current circuit breaker circuit according to claim 1, is characterized in that, described residual current signal conditioning circuit is by resistance R 3, R4, R5, and capacitor C 2, C6, C8, C9 and diode D4 form; Resistance R 3, R4, R5 are connected in series, and capacitor C 6, C8, C9 are connected in series, and capacitor C 2 is connected in series between resistance R 4 and resistance R 5, and diode D4 and resistance R 3 are connected in parallel.
3. small-sized residual current circuit breaker circuit according to claim 1, is characterized in that, described power circuit is comprised of surge restraint circuit, half-wave rectifying circuit, resistance reduction voltage circuit, external voltage stabilizing circuit, filter circuit and release; Wherein said surge restraint circuit consists of piezo-resistance MYR1, half-wave rectifying circuit consists of diode D1, and resistance reduction voltage circuit consists of resistance R 2, and external voltage stabilizing circuit consists of voltage stabilizing didoe D2, filter circuit consists of capacitor C 1, and release is comprised of release Trip.
4. small-sized residual current circuit breaker circuit according to claim 1, is characterized in that, described residual current detection control unit is comprised of residual current detection integrated circuit U1.
5. small-sized residual current circuit breaker circuit according to claim 1, is characterized in that, described residual current hookup is comprised of resistance R 1.
6. small-sized residual current circuit breaker circuit according to claim 1, is characterized in that, described trip circuit is by controllable silicon D3, and resistance R 6 and capacitor C 5, C7 form.
7. small-sized residual current circuit breaker circuit according to claim 4, is characterized in that, described residual current detection integrated circuit U1 refers to VG54123.
CN201320616711.2U 2013-10-08 2013-10-08 Circuit of miniature residual current circuit breaker Expired - Fee Related CN203589692U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320616711.2U CN203589692U (en) 2013-10-08 2013-10-08 Circuit of miniature residual current circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320616711.2U CN203589692U (en) 2013-10-08 2013-10-08 Circuit of miniature residual current circuit breaker

Publications (1)

Publication Number Publication Date
CN203589692U true CN203589692U (en) 2014-05-07

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103500984A (en) * 2013-10-08 2014-01-08 长城电器集团有限公司 Circuit of miniature residual current circuit breaker
CN104577978A (en) * 2015-01-28 2015-04-29 长城电器集团有限公司 Time-delayed residual current circuit-breaker circuit
CN104577972A (en) * 2015-01-28 2015-04-29 长城电器集团有限公司 Minitype residual current protective circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103500984A (en) * 2013-10-08 2014-01-08 长城电器集团有限公司 Circuit of miniature residual current circuit breaker
CN103500984B (en) * 2013-10-08 2016-09-07 长城电器集团有限公司 Circuit of miniature residual current circuit breaker
CN104577978A (en) * 2015-01-28 2015-04-29 长城电器集团有限公司 Time-delayed residual current circuit-breaker circuit
CN104577972A (en) * 2015-01-28 2015-04-29 长城电器集团有限公司 Minitype residual current protective circuit

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CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140507

Termination date: 20171008