CN102099979A - Method for performing a self-test by a residual current operated device, and residual current operated device - Google Patents
Method for performing a self-test by a residual current operated device, and residual current operated device Download PDFInfo
- Publication number
- CN102099979A CN102099979A CN2009801274203A CN200980127420A CN102099979A CN 102099979 A CN102099979 A CN 102099979A CN 2009801274203 A CN2009801274203 A CN 2009801274203A CN 200980127420 A CN200980127420 A CN 200980127420A CN 102099979 A CN102099979 A CN 102099979A
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- Prior art keywords
- test
- self
- current
- current protection
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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
- 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)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Relating To Insulation (AREA)
Abstract
A residual current operated device is designed to be able to perform a self-test. The self-test is designed to be performed only in exceptional cases when a heavy current flows through the residual current operated device, because a self-test causes contacts (20, 20') to open, at which contact erosion can occur. Means (40) for measuring the amperage via power supply lines (18, 44; 18', 44') measure the amperage and communicate the result to a control unit (36) comprising a unit (48) in which a decision is made as to whether a self-test will be performed, in order to enable a self-test unit (34) to effect the performance of the self-test. In the decision the amount of time is taken into account that has elapsed since the last self-test, or the time of day. Optionally a self-test is performed also if a heavy current is present after a maximum time interval has elapsed.
Description
Technical field
The present invention relates to a kind of fault current protection device that is used to pass through---as fault current protection switch---and carry out the method for self-test; wherein fault current protection device should be ready for using; promptly with current circuit coupling, thus in the current circuit of closure the electric current fault current protection device of flowing through.The invention still further relates to a kind of fault current protection device, in described fault current protection device, can carry out the method according to this invention.
Background technology
In order to check the ability to function of failure current protection switch, failure current protection switch has the detection key so far.Operating personnel's task is to carry out functional test at the failure current protection switch place by the operation detection key termly.
Because operating personnel may forget the execution functional test, so the failure current protection switch of carrying out self-test is provided.Having the failure current protection switch of carrying out self-testing capability is known on market.At this, the moment when the time-controlling arrangement regulation carries out self-test.
If just in big electric current is flowed through failure current protection switch, carry out self-test during contact to be disconnected, serious so-called pitting of contacts then appears, and promptly the material of contact element is by deterioration.Shorten the useful life of equipment thus.Especially true in the execution mode that main contacts to be disconnected does not discharge by parallel branch.
Summary of the invention
Task of the present invention is that a kind of approach that can improve the useful life with fault current protection device of carrying out self-testing capability is described.
This task solves by having according to the method for the feature of claim 1 and the fault current protection device that has according to the feature of claim 4.
Therefore, determine in the method according to the invention: flow through respectively current circuit at least a portion electric current current strength according to predetermined standard whether with the self-test compatibility.In the moment of considering regulation self-test under this situation of determining the result.
Describedly determine especially can to repeat, and when satisfying described standard, carry out self-test immediately.
In the reduced form of this execution mode, when carry out described definite step by the time-controlling arrangement regulation: this can carry out after predetermined query time of self-test last time expires at interval or in the predetermined moment (load that for example is defined as failure current protection switch is expected the time of determining on daytime lower and that can reasonably carry out self-test).If described definite result is sure, then carry out self-test.Otherwise continue or repeat describedly to determine.In a replacement scheme, continue always or repeat describedly to determine, till the some time is satisfied preassigned.In another replacement scheme, continue always or repeat describedly to determine, up to or satisfy predetermined standard or experienced the preset time section or under the situation of time on daytime, arrived predetermined another constantly from self-test last time, and carry out self-test subsequently.
Because only need binary information, promptly whether reasonably carry out self-test and serious pitting of contacts do not occur, perhaps whether should not consider self-test because of possible serious pitting of contacts, thus can use suitable, only export the unit of corresponding binary signal.
At a plurality of current circuits (measuring electric current on these current circuits) and using relevant more complicated standard and also wishing under the situation of difference work, can in determining step, measure the corresponding current strength that flows through the current circuit current circuit partly that belongs to be measured.In order to derive the whether compatible binary message of described current strength and self-test, can use the appropriate threshold standard.During a plurality of current strength on measuring a plurality of current circuits, the vector group who has as the threshold value of the item (Eintrag) in the vector be can provide, threshold curve or threshold value plane in the more high-dimensional space promptly determined whether to be higher or lower than.If only consider current strength as standard, then can use a unique threshold value, current strength and described unique threshold value compare.
The current strength that fault current protection device according to the present invention has an electric current that is used to carry out the device of self-test and is used to determine flow through the current circuit that is coupled with failure current protection switch whether with the device of self-test compatibility.The described device that is used to determine is coupled with the device that is used to carry out.In this way, by the device judgement that is used to carry out self-test: whether or when to carry out self-test.
Such judgement especially can be made by being used to cause the control unit of self-test, and if carry corresponding metrical information to described control unit, described control unit can partly be born described definite task simultaneously.Therefore can be provided with the device of the current strength that is used to measure the electric current that flows through current circuit and be used for sending the device of the signal that comprises relevant information to control unit.Preferably, control unit also comprises clock generator or is coupled with clock generator.Like this, control unit can similarly be made according to signal that is generated by clock generator and the signal that device generated that is used to measure and cause the corresponding judgement of carrying out self-test.
Description of drawings
Below with reference to accompanying drawing preferred implementation of the present invention is described, wherein
The schematically illustrated conduct of Fig. 1 is according to the failure current protection switch of fault current protection device of the present invention, and
The schematically illustrated the method according to this invention of Fig. 2 by carrying out according to the fault current protection device of Fig. 1.
Embodiment
Shown in Figure 1 and are traditional failure current protection switch 12 with the core of the failure current protection switch of 10 marks on the whole.Failure current protection switch can be encased in the line system; promptly be connected on the splicing ear that provides by means of current circuit; wherein for example the right splicing ear 14 of the splicing ear of current circuit connects in first side; and splicing ear 16a or 16b are connected in second side with current circuit, and wherein in failure current protection switch splicing ear to 14 and 16a or 16b be connected to each other by circuit 18 in inside.Failure current protection switch is characterised in that: be furnished with switch 20 in circuit 18, can interrupt being connected between splicing ear 14 and 16a or the 16b by described switch 20.Execution mode at the failure current protection switch that is used for two electrode systems this illustrate.The present invention also can be used on the failure current protection switch that is used for quadrupole system, and described quadrupole system has three phase circuits and one zero lead.Except that element 14,16a and the 16b and 18 that have mentioned, also there is accordingly, in Fig. 1, is painted with the element of dotted line at this for second utmost point.
Therefore, circuit 18 and 18 ' is conducted through total current transducer 22 in primary side, makes in case the electric current that breaks down just detects magnetic field in primary side.If do not break down electric current, then electric current is flowing through circuit 18 and flowing through circuit 18 ' on the opposite direction that is provided with on the first direction.The magnetic field that is provided by the electric current in the total current transducer 22 compensates mutually, makes to detect less than magnetic field in primary side.If total current, then flow through one electric current in two circuits 18 and 18 ' greater than another the electric current that flows through in two circuits.So magnetic field is provided on primary side, this magnetic field induces electric current in the circuit of primary side, and this electric current is detected by analysis and processing unit 24.Flow if the analysis separative element has detected fault current, then analysis and processing unit 24 acts on switching mechanism 26, by these switching mechanism 26 cut- off switch 20,22 '.Traditional failure current protection switch has manual detection loop, and it is shown in Figure 1 that this detects the loop, even it is optional in failure current protection switch according to the present invention.Detect the loop and have circuit 28, this circuit 28 can make circuit 18 and 18 ' be connected to each other when switch 20 and 20 ' closure.In order to set up such connection, operation makes the detection key of switch 30 closures in the circuit 28.By other elements in expression detection loop, element 32 symbolism ground, these elements are not described at this.If electric current is flowing to circuit 18 ' from circuit 18 under the situation of walking around the total current switch when switch 30 is closed, then the reaction of total current switch 22 be mobile as fault current.Correspondingly, analyzing and processing circuit 24 is made a response and is realized the disconnection of switch 20 and 20 ' by switching mechanism 26.
Comprise self-test unit 34 now according to failure current protection switch of the present invention as the part of control unit 36.That this self-test unit 34 should satisfy is identical, have manual detection task in addition: failure current protection switch should be checked in its function aspects.Self-test unit 34 alleviates the burden that operating personnel regularly carry out check.Alternatively, control unit 36 has time-controlling arrangement 38, and this time-controlling arrangement 38 makes self-test unit 34 carry out self-test.With the circuit 28 with switch 30 similarly, self-test unit 34 can cause that electric current walks around total current transducer 22 and flow, thus the reaction of this total current transducer 22 be mobile as fault current.But self-test unit 34 also can only act on the primary side of total current transducer and therefore directly act on analysis and processing unit 24.Now, time-controlling arrangement 38 causes that self-test unit 34 comes to life at preset time.For example, can carry out self-test at interval with preset time.Equally also can carry out self-test in the time of determining on daytime.
Verified now, it is disadvantageous that the running status of self-test unit and whole system is irrespectively carried out self-test:
If just when big electric current flows through circuit 18 and 18 ' owing to carry out self-test Closing Switch 20 and 20 ', then may locate or pitting of contacts occurs at switch 20 and 20 ' at the contact element place that belongs to switch.
For this reason, expansion has traditional failure current protection switch 12 of control unit 36 to expand other device, promptly be used for measuring flow through circuit 18 and 18 ' or with the device of the current strength of the circuit of its coupling: this device marks with 40 at Fig. 1.Resistance 42,42 ' is provided, and the electric current that flows through circuit 18 and 18 ' also flows through described resistance 42 and 42 '.Corresponding track section 44 and 44 ' can be the part through the failure current protection switch 10 of expansion; make this failure current protection switch 10 be connected with 16b ' by outside splicing ear 16b; but circuit 44 and 44 ' also can be the circuit that differently is arranged in actual failure current protection switch outside with Fig. 1; these circuits only are coupled with failure current protection switch, and like this external connection terminals of failure current protection switch is a splicing ear 16 and 16 '.Now, measure respectively at resistance 42 and the 42 ' voltage that upward descends by voltage measurement unit 46.Under the known situation of resistance value, can derive the current strength of the electric current that flows through track section 44 and 44 ' and derive the current strength of the electric current of current through line 18 and 18 ' thus.Also can inductively measure current strength in the position of using resistance 42 and 42 '.
Now, measured value flows to control unit 36 by voltage measurement unit 46, i.e. the judging unit 48 that exists in control unit 36.Following with reference to Fig. 2, whether and when regulation carries out self-test in judging unit 48.Then, self-test unit 34 causes the execution of self-test in the moment of defined.After self-test, reclose device 50 and be responsible for: closing contact 20 and 20 ' again.
Now, with reference to Fig. 2 the method according to this invention is described in execution mode.
The time-controlling arrangement 38 that also can be called " time detection device " is determined in the step S10 that continues or repeat: whether query time expires at interval.Whether also can relate to: whether experienced preset time from self-test last time, perhaps expired at interval from the time query time of determining, promptly whether preset time is effective.Simultaneously, measure the device that loop 40(is used to measure) can be to continue to enliven.Also can when expiring at interval, directly measure query time the activation in loop 40.Now, detect: whether have non-loaded state, promptly in current network, whether be connected with high capacity and therefore big electric current current through line 18,44 or 18 ', 44 ' just according to step S12.If this problem is answered with "Yes" as the problem after the time interval expiration just, then the inquiry of carrying out according to step S14 by " with " logical operation answers with "Yes".In step S16 for " or " in the connection of inquiry, described "Yes" makes and to continue to draw "Yes", and according to step S18 by the 34 execution self-tests of self-test unit.Also can for " or " inquiry distributes second input, whether check maximum time expires at interval in step S20 or rather: measure loop 40 and may define flowing of the electric current that is regarded as " excessive " constantly, thereby in step S14 " with " output of inquiry also answers with "No" constantly.Like this can not carry out self-test.For do not occur self-test continue stop, definition maximum time at interval, promptly from maximum time of self-test last time at interval.This time interval also can relate to preset time, thereby stipulates for second time at interval by regulation maximum time, and carries out self-test the latest to this second time the time.If in step S20, after maximum time expires at interval, answer a question with "Yes", then according to step S16 " or " also provide "Yes" in the inquiry, thereby carry out self-test according to step S18.
Questions answer among the step S12 is determined to carry out the moment of self-test:, then after expiration, just carry out self-test at interval at query time if answer is "yes".The existence of this relation only finishes when maximum time expires at interval.
Reference numerals list
10 failure current protection switch
12 traditional failure current protection switch
14,16a, 16a ', 16b, 16b ' splicing ear
18,18 ', 28 circuits
20,20 ', 30 switches
22 total current converters
24 analysis and processing unit
26 switching mechanisms
32 elements
34 self-test unit
36 control units
38 time-controlling arrangements
40 measure the loop
42,42 ' resistance
44,44 ' track section
46 voltage measurement units
48 judging units
50 reclose device
S10, S12, S14, S16, S18, S20 step
Claims (5)
1. method that is used for carrying out self-test by fault current protection device (10), described fault current protection device (10) and current circuit coupling, described method has following steps:
The current strength of the electric current of at least a portion of-described current circuit of determining to flow through respectively according to predetermined standard whether with the self-test compatibility,
The moment of-described the self-test of regulation under the situation of considering described definite result.
2. method according to claim 1, wherein after the predetermined interrogation spacing expiration of self-test last time or in the predetermined moment, carrying out described determining step, if and described definite result is sure, then carry out described self-test, otherwise repeat described definite, up to a) satisfying predetermined standard, perhaps b in case of necessity) experienced the preset time section or another predetermined moment arrives from self-test last time, satisfied a) or satisfying in case of necessity b then) situation under carry out self-test.
3. method according to claim 1 and 2,
It is characterized in that,
In described determining step, measure corresponding current strength.
4. a fault current protection device has
-be used to carry out the device of self-test,
-be used to determine to flow through the current circuit (44 that is coupled with described fault current protection device (10) or belongs to described fault current protection device; the current strength of electric current 44 ') whether with the device (40 of self-test compatibility; 48); wherein being used to the device of determining (40,48) was coupled with the device (34) that is used to carry out.
5. fault current protection device according to claim 4; have control unit (36) that is used to cause self-test and the current strength that is used to measure the electric current that flows through current circuit and the device (40) that is used for sending the signal that comprises relevant information to described control unit (36); wherein said control unit (36) comprises clock generator (38) or is coupled with clock generator, and described control unit is designed to similarly consider signal that is generated by described clock generator (38) and the signal that is generated by the described device that is used to measure (40) in order to cause the execution self-test.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008033148.1 | 2008-07-15 | ||
| DE200810033148 DE102008033148B4 (en) | 2008-07-15 | 2008-07-15 | Method for performing a self-test by a residual current device and residual current device |
| PCT/EP2009/057497 WO2010006868A1 (en) | 2008-07-15 | 2009-06-17 | Method for performing a self-test by a residual current operated device, and residual current operated device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102099979A true CN102099979A (en) | 2011-06-15 |
| CN102099979B CN102099979B (en) | 2016-03-23 |
Family
ID=41139293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980127420.3A Expired - Fee Related CN102099979B (en) | 2008-07-15 | 2009-06-17 | Method and the fault current protection device of self-test is performed by fault current protection device |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2301127A1 (en) |
| CN (1) | CN102099979B (en) |
| DE (1) | DE102008033148B4 (en) |
| WO (1) | WO2010006868A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426698A (en) * | 2012-05-22 | 2013-12-04 | 哥维斯股份公司 | Residual current operated circuit breaker with self-test device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015012923A1 (en) | 2015-10-07 | 2017-04-13 | Jenoptik Advanced Systems Gmbh | Residual current sensor for a residual current device for monitoring a vehicle electrical load, residual current device and method for performing a self-test of a residual current sensor |
| DE102020200995B4 (en) | 2020-01-28 | 2023-06-01 | Siemens Aktiengesellschaft | Remote drive arrangement and test procedures |
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| US4954727A (en) * | 1988-08-01 | 1990-09-04 | General Dynamics Corp., Space Systems Division | Hybrid transformer current zero switch |
| CN1074561A (en) * | 1992-01-16 | 1993-07-21 | 株式会社日立制作所 | Be connected circuit breaker and method of operation thereof between power line and external circuit |
| DE19529474C1 (en) * | 1995-08-11 | 1997-01-23 | Aeg Sensorsysteme Gmbh | Automatic monitoring system for fault current protection switch |
| JPH09237554A (en) * | 1996-02-28 | 1997-09-09 | Mitsubishi Electric Corp | Dc circuit breaker and dc power supply unit |
| JPH11339629A (en) * | 1998-05-25 | 1999-12-10 | Mitsubishi Electric Corp | Earth leakage breaker |
| CN2476868Y (en) * | 2001-04-30 | 2002-02-13 | 时代集团公司 | Compound switch with contactor and control circuit |
| JP2004087154A (en) * | 2002-08-23 | 2004-03-18 | Kawamura Electric Inc | Test circuit of earth leakage breaker |
| CN1521785A (en) * | 2003-01-28 | 2004-08-18 | 上海天峰科技发展有限公司 | Phase-splitting control high and low voltage switch electrical equipment and control method thereof |
| CN1828320A (en) * | 2006-02-20 | 2006-09-06 | 武汉华电国电高压科技发展有限公司 | On-line monitoring method and system for converting station high voltage electrical apparatus |
| JP2006345699A (en) * | 2006-09-19 | 2006-12-21 | Mitsubishi Electric Corp | Protection device for load circuits |
| WO2007123389A1 (en) * | 2006-04-26 | 2007-11-01 | See Ni Fong | An earth leakage protection device with time alert feature |
| CN101159193A (en) * | 2007-09-28 | 2008-04-09 | 珠海格力电器股份有限公司 | Control method and system for prolonging electric service life of single-phase relay and alternating current contactor |
| CN101170027A (en) * | 2006-10-23 | 2008-04-30 | 哥维斯股份公司 | Automatic reset and self-test device particularly for residual current operated circuit breakers and the like |
-
2008
- 2008-07-15 DE DE200810033148 patent/DE102008033148B4/en not_active Expired - Fee Related
-
2009
- 2009-06-17 WO PCT/EP2009/057497 patent/WO2010006868A1/en active Application Filing
- 2009-06-17 EP EP09779804A patent/EP2301127A1/en not_active Withdrawn
- 2009-06-17 CN CN200980127420.3A patent/CN102099979B/en not_active Expired - Fee Related
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4954727A (en) * | 1988-08-01 | 1990-09-04 | General Dynamics Corp., Space Systems Division | Hybrid transformer current zero switch |
| CN1074561A (en) * | 1992-01-16 | 1993-07-21 | 株式会社日立制作所 | Be connected circuit breaker and method of operation thereof between power line and external circuit |
| DE19529474C1 (en) * | 1995-08-11 | 1997-01-23 | Aeg Sensorsysteme Gmbh | Automatic monitoring system for fault current protection switch |
| JPH09237554A (en) * | 1996-02-28 | 1997-09-09 | Mitsubishi Electric Corp | Dc circuit breaker and dc power supply unit |
| JPH11339629A (en) * | 1998-05-25 | 1999-12-10 | Mitsubishi Electric Corp | Earth leakage breaker |
| CN2476868Y (en) * | 2001-04-30 | 2002-02-13 | 时代集团公司 | Compound switch with contactor and control circuit |
| JP2004087154A (en) * | 2002-08-23 | 2004-03-18 | Kawamura Electric Inc | Test circuit of earth leakage breaker |
| CN1521785A (en) * | 2003-01-28 | 2004-08-18 | 上海天峰科技发展有限公司 | Phase-splitting control high and low voltage switch electrical equipment and control method thereof |
| CN1828320A (en) * | 2006-02-20 | 2006-09-06 | 武汉华电国电高压科技发展有限公司 | On-line monitoring method and system for converting station high voltage electrical apparatus |
| WO2007123389A1 (en) * | 2006-04-26 | 2007-11-01 | See Ni Fong | An earth leakage protection device with time alert feature |
| JP2006345699A (en) * | 2006-09-19 | 2006-12-21 | Mitsubishi Electric Corp | Protection device for load circuits |
| CN101170027A (en) * | 2006-10-23 | 2008-04-30 | 哥维斯股份公司 | Automatic reset and self-test device particularly for residual current operated circuit breakers and the like |
| CN101159193A (en) * | 2007-09-28 | 2008-04-09 | 珠海格力电器股份有限公司 | Control method and system for prolonging electric service life of single-phase relay and alternating current contactor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426698A (en) * | 2012-05-22 | 2013-12-04 | 哥维斯股份公司 | Residual current operated circuit breaker with self-test device |
| CN103426698B (en) * | 2012-05-22 | 2016-12-28 | 哥维斯股份公司 | Have self-test device by residual current-operated chopper |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2301127A1 (en) | 2011-03-30 |
| WO2010006868A1 (en) | 2010-01-21 |
| DE102008033148B4 (en) | 2014-01-02 |
| DE102008033148A1 (en) | 2010-02-11 |
| CN102099979B (en) | 2016-03-23 |
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Granted publication date: 20160323 Termination date: 20190617 |