CN112072613A - Residual current operated circuit breaker capable of self-checking - Google Patents
Residual current operated circuit breaker capable of self-checking Download PDFInfo
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- CN112072613A CN112072613A CN202010965878.4A CN202010965878A CN112072613A CN 112072613 A CN112072613 A CN 112072613A CN 202010965878 A CN202010965878 A CN 202010965878A CN 112072613 A CN112072613 A CN 112072613A
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- circuit breaker
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- checking
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- 238000001514 detection method Methods 0.000 claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000011084 recovery Methods 0.000 claims abstract description 6
- 230000009471 action Effects 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011990 functional testing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000008571 general function Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
- H02H3/334—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control
- H02H3/335—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control the main function being self testing of the device
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Breakers (AREA)
Abstract
The invention relates to a residual current operated circuit breaker capable of self-checking, which comprises: the circuit breaker comprises a circuit breaker body, a leakage detection unit, a driving unit and a power failure detection unit, wherein the power failure detection unit is arranged at the input end of the circuit breaker body and is used for detecting the power-on state of a power transmission line; the self-checking unit is used for generating set simulated leakage current which can be detected by the leakage current detecting unit; and the control unit is respectively connected with the self-checking unit, the power failure detection unit and the driving unit, and is used for controlling the self-checking unit to output the set simulated leakage current according to the signals acquired by the power failure detection unit or respectively controlling the driving unit to disconnect the power transmission line according to the set period, and controlling the self-checking unit to output the set simulated leakage current. Whether the incoming line end of the circuit breaker body is electrified or not and the power utilization state of the outgoing line end are detected, and comprehensive self-detection and self-recovery are carried out under the condition that the circuit breaker is powered on or off during power failure; or the circuit breaker is driven by the self to cut off the power according to specific time, so that the comprehensive self-checking and self-recovery are carried out.
Description
Technical Field
The invention relates to the field of low-voltage appliances, in particular to a residual current operated circuit breaker capable of self-checking.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time.
The residual current operated circuit breaker is to be the manual residual current functional test once monthly, and the prepayment residual current operated circuit breaker is installed in the ammeter case, and it is very troublesome to carry out the manual residual current functional test.
In addition, the self-checking action of the existing circuit breaker only has the function of automatically detecting the response capability of the residual current operated circuit breaker to the ground fault, and the action capability of the mechanical part of the residual current operated circuit breaker cannot be checked.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a residual current operated circuit breaker capable of self-checking.
In order to achieve the purpose, the invention provides the following technical scheme:
a residual current operated circuit breaker capable of self-checking, comprising:
the circuit breaker body is used for cutting off the power transmission line;
the leakage detection unit is arranged at the output end of the circuit breaker body and used for detecting leakage current of the power transmission line;
the driving unit is linked with the tripping mechanism of the circuit breaker body and operates the circuit breaker body to disconnect the power transmission line;
the power failure detection unit is arranged at the input end or the output end of the circuit breaker body and used for detecting the power-on state of the power transmission line;
the circuit breaker comprises a circuit breaker body, a current breaking detection unit and a control unit, wherein the circuit breaker body is provided with an input end or an output end;
the self-checking unit is used for generating set simulated leakage current which can be detected by the leakage current detecting unit;
and the control unit is respectively connected with the self-checking unit, the power failure detection unit, the cut-off detection unit and the driving unit and is used for controlling the self-checking unit to output a set simulation leakage current control driving unit to switch off the power transmission line according to signals acquired by the power failure detection unit and the cut-off detection unit, and the control unit performs self-recovery action to switch on the power transmission line after a temporary delay.
The control unit is connected with the prepaid input unit.
The power-off detection unit comprises a high-voltage low-power-consumption power supply, and the high-voltage low-power-consumption power supply is connected with the input end of the circuit breaker body and the control unit respectively.
And an anti-surge rectifying unit is arranged between the high-voltage low-power-consumption power supply and the input end of the circuit breaker body.
The anti-surge rectifying unit is electrically connected with the switching power supply.
And a voltage-stabilized power supply is arranged between the switching power supply and the control unit.
The control unit is connected with the control end of the switching power supply.
The self-checking unit comprises a manual test button and an electronic test button, and the electronic test button is electrically connected with the power-off detection unit.
The control unit controls the self-test unit according to a set time period to enable the self-test unit to generate simulated leakage current.
The control unit updates self-checking time period set by the control unit by acquiring zero current information output by the cutoff detection unit.
The invention has the beneficial effects that: whether the incoming line end of the circuit breaker body is electrified or not and the power utilization state of the outgoing line end are detected, and comprehensive self-detection self-recovery is carried out under the condition that the circuit breaker is powered on or off in power failure, or the circuit breaker is driven to be powered off automatically according to specific time so as to carry out comprehensive self-detection self-recovery.
Drawings
FIG. 1 is a logic block diagram of the circuit of the present invention.
Fig. 2 is a schematic circuit diagram of the self-test unit of the present invention.
Fig. 3 is a circuit schematic diagram of a freewheel signal input circuit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1, a residual current operated circuit breaker capable of self-checking includes:
the circuit breaker body 1 is used for cutting off a power transmission line and is provided with a handle and a tripping device to realize the general functions of the circuit breaker.
The leakage detection unit 2 is arranged at the output end of the circuit breaker body and used for detecting leakage current of the power transmission line;
the driving unit 8 is linked with a tripping mechanism of the circuit breaker body and operates the circuit breaker body to disconnect the power transmission line; namely, the solid structure of the tripping mechanism of the circuit breaker body can be integrated with the solid structure of the driving unit.
The power failure detection unit is arranged at the input end of the circuit breaker body and used for detecting the power-on state of the power transmission line;
a self-test unit 11 for generating a set analog leakage current that can be detected by the leakage current detection unit;
and the control unit 6 is respectively connected with the self-detection unit, the power-off detection unit and the driving unit, and is used for controlling the self-detection unit to output the set simulated leakage current according to the signal acquired by the power-off detection unit and controlling the self-detection unit to output the set simulated leakage current.
The control unit is connected to a prepaid input unit 7.
The power-off detection unit comprises a high-voltage low-power-consumption power supply 4, and the high-voltage low-power-consumption power supply is connected with the input end of the circuit breaker body and the control unit respectively. The high-voltage low-power consumption power supply provides the working voltage of the control unit and provides an on-off electric signal of a power-on circuit. When the on-off signal is generated, when the self-checking module is triggered to perform electric leakage self-checking, the cut-off detection unit sends zero current information, and meanwhile, the control unit adjusts the set time period according to the zero current information, so that the time period arrangement is more reasonable.
And an anti-surge rectifying unit is arranged between the high-voltage low-power-consumption power supply and the input end of the circuit breaker body, so that the protection effect is achieved.
The anti-surge rectifying unit 3 is electrically connected with the switching power supply 10 and is converted into a working power supply of the driving unit through the switching power supply.
And a stabilized voltage power supply 9 is arranged between the switching power supply and the control unit and plays a role of a standby power supply.
The control unit is connected with the control end of the switch power supply, and the switch of the switch power supply is controlled by the control unit to enable the switch power supply to be in a working or dormant state.
The self-checking unit comprises a manual test button and an electronic test button, and the electronic test button is electrically connected with the power-off detection unit. When a user presses a manual test button, the circuit breaker body performs leakage current detection once, and the control unit generates simulated leakage current which can simulate the real occurrence condition, so that whether protective measures and equipment for electric leakage in the circuit breaker body are effective or not is detected.
The electronic test button comprises a silicon controlled rectifier Q1, the anode and the cathode of the silicon controlled rectifier are connected with the direct current output end of a rectifier bridge, the alternating current input end of the rectifier bridge BR1 is respectively electrically connected with an L line and an N line, the control electrode of the silicon controlled rectifier is connected with one pin of a control unit, and the silicon controlled rectifier is switched on or off by using the change of the output power supply of the rectifier bridge, so that the control of power-off self-test is realized. The detailed circuit is shown in fig. 2.
The control unit controls the self-test unit according to a set time period to enable the self-test unit to generate simulated leakage current. For example, the self-test is performed monthly, weekly, or quarterly.
In order to realize more reasonable setting of the self-checking period, a follow current signal input circuit is adopted, the follow current sensor 12 is used for detecting the current of the power transmission line, when the power transmission line is cut off, the follow current signal input circuit outputs a zero current signal, and the control unit performs new self-checking period setting according to the obtained zero current signal, so that the self-checking period interval is consistent, and the self-checking is more reasonable. The detailed circuit is shown in fig. 3.
The control unit automatically resets the switch after the external line is powered off (5-15 days from the last self-check); the switch self-checking after the internal line actively cuts off the current automatically resets (5-15 days from the last self-checking); time-delayed self-test self-reset (30 days from the last self-test).
One of them self-checking operation mode is as follows, through the power of the socket and the switch of artificial cutting off except arbitrary one lamp, through the artificial remaining lamp that closes, realize the zero current detection of circuit breaker output, when this zero current is gathered to afterflow signal input circuit, trigger the self-checking operation promptly, mode in the past relatively, need not to operate the self-checking button of circuit breaker, after all the circuit breaker is generally installed in the ammeter case, and be difficult for being operated by the user, adopt this kind of mode can need not to open the ammeter case, can realize accomplishing the self-checking operation at home.
The examples should not be construed as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of protection of the present invention.
Claims (10)
1. The utility model provides a residual current operated circuit breaker of ability self-checking which characterized in that: it includes:
the circuit breaker body is used for cutting off the power transmission line;
the leakage detection unit is arranged at the output end of the circuit breaker body and used for detecting leakage current of the power transmission line;
the driving unit is linked with the tripping mechanism of the circuit breaker body and operates the circuit breaker body to disconnect the power transmission line;
the power failure detection unit is arranged at the input end or the output end of the circuit breaker body and used for detecting the power-on state of the power transmission line;
the circuit breaker comprises a circuit breaker body, a cutoff detection unit and a control unit, wherein the circuit breaker body is provided with a power supply circuit;
the self-checking unit is used for generating set simulated leakage current which can be detected by the leakage current detecting unit;
and the control unit is respectively connected with the self-checking unit, the power failure detection unit, the cut-off detection unit and the driving unit and is used for controlling the self-checking unit to output a set simulation leakage current control driving unit to switch off the power transmission line according to signals acquired by the power failure detection unit and the cut-off detection unit, and the control unit performs self-recovery action to switch on the power transmission line after a temporary delay.
2. The residual current operated circuit breaker capable of self-checking according to claim 1, characterized in that: the control unit is connected with the prepaid input unit.
3. The residual current operated circuit breaker capable of self-checking according to claim 1, characterized in that: the power-off detection unit comprises a high-voltage low-power-consumption power supply, and the high-voltage low-power-consumption power supply is connected with the input end of the circuit breaker body and the control unit respectively.
4. The residual current operated circuit breaker capable of self-checking according to claim 3, characterized in that: and an anti-surge rectifying unit is arranged between the high-voltage low-power-consumption power supply and the input end of the circuit breaker body.
5. The residual current operated circuit breaker capable of self-checking according to claim 4, characterized in that: the anti-surge rectifying unit is electrically connected with the switching power supply.
6. The residual current operated circuit breaker capable of self-checking according to claim 5, characterized in that: and a voltage-stabilized power supply is arranged between the switching power supply and the control unit.
7. The residual current operated circuit breaker capable of self-checking according to claim 5, characterized in that: the control unit is connected with the control end of the switching power supply.
8. The residual current operated circuit breaker capable of self-checking according to claim 1, characterized in that: the self-checking unit comprises a manual test button and an electronic test button, and the electronic test button is electrically connected with the power-off detection unit.
9. The residual current operated circuit breaker capable of self-checking according to claim 1, characterized in that: the control unit controls the self-test unit according to a set time period to enable the self-test unit to generate simulated leakage current.
10. The residual current operated circuit breaker capable of self-checking according to claim 9, characterized in that: the control unit updates self-checking time period set by the control unit by acquiring zero current information output by the cutoff detection unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010965878.4A CN112072613A (en) | 2020-09-15 | 2020-09-15 | Residual current operated circuit breaker capable of self-checking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010965878.4A CN112072613A (en) | 2020-09-15 | 2020-09-15 | Residual current operated circuit breaker capable of self-checking |
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| Publication Number | Publication Date |
|---|---|
| CN112072613A true CN112072613A (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010965878.4A Pending CN112072613A (en) | 2020-09-15 | 2020-09-15 | Residual current operated circuit breaker capable of self-checking |
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| CN (1) | CN112072613A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010019741A1 (en) * | 2010-05-07 | 2011-11-10 | Siemens Aktiengesellschaft | Switching mechanism for leakage current circuit breaker that is utilized as protective device for inadmissible current during current accidents, has carrier for bidirectionally transmitting signal between mechanism and auxiliary module |
| CN106300239A (en) * | 2016-08-16 | 2017-01-04 | 华通机电股份有限公司 | A kind of residual current action breaker |
| CN109449059A (en) * | 2018-09-27 | 2019-03-08 | 杭州四方博瑞科技股份有限公司 | Intelligent breaker with self-checking function |
| CN109755921A (en) * | 2017-11-08 | 2019-05-14 | 苏州益而益电器制造有限公司 | Ground-fault interrupter |
| CN111091699A (en) * | 2019-12-30 | 2020-05-01 | 安徽波瑞电气有限公司 | Street lamp circuit breaker based on ad hoc network module and with metering operation and method |
-
2020
- 2020-09-15 CN CN202010965878.4A patent/CN112072613A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010019741A1 (en) * | 2010-05-07 | 2011-11-10 | Siemens Aktiengesellschaft | Switching mechanism for leakage current circuit breaker that is utilized as protective device for inadmissible current during current accidents, has carrier for bidirectionally transmitting signal between mechanism and auxiliary module |
| CN106300239A (en) * | 2016-08-16 | 2017-01-04 | 华通机电股份有限公司 | A kind of residual current action breaker |
| CN109755921A (en) * | 2017-11-08 | 2019-05-14 | 苏州益而益电器制造有限公司 | Ground-fault interrupter |
| CN109449059A (en) * | 2018-09-27 | 2019-03-08 | 杭州四方博瑞科技股份有限公司 | Intelligent breaker with self-checking function |
| CN111091699A (en) * | 2019-12-30 | 2020-05-01 | 安徽波瑞电气有限公司 | Street lamp circuit breaker based on ad hoc network module and with metering operation and method |
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Application publication date: 20201211 |
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| RJ01 | Rejection of invention patent application after publication |