CN102280317A - Circuit breaker capable of detecting contact fault - Google Patents
Circuit breaker capable of detecting contact fault Download PDFInfo
- Publication number
- CN102280317A CN102280317A CN2011101540268A CN201110154026A CN102280317A CN 102280317 A CN102280317 A CN 102280317A CN 2011101540268 A CN2011101540268 A CN 2011101540268A CN 201110154026 A CN201110154026 A CN 201110154026A CN 102280317 A CN102280317 A CN 102280317A
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- CN
- China
- Prior art keywords
- circuit
- side terminal
- terminal
- power supply
- breaker
- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/0015—Means for testing or for inspecting contacts, e.g. wear indicator
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
- H01H2300/052—Controlling, signalling or testing correct functioning of a switch
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Abstract
The invention provides a circuit breaker capable of detecting contact faults, which can detect contact faults in terminals on a source side and a load side by a single sensor circuit. The circuit breaker comprises power supply wires (7) and detection wires (8) which are parallel arranged and located between the source side (3) and the load side (4). The circuit breaker further comprises contacts (9) on each power supply wires (7), and a sensor circuit (11) and a switch (12) which are serially connected in the detection wires (8). The circuit breaker further comprises a sensor circuit (11) and a control circuit (14). The control circuit determines whether a contact fault is existent between terminal parts (5) (6) based on an output of the sensor circuit. If any, the control circuit then sends a cut-off signal to a breaking coil (20) which is coupled between a handle (23) and a switching mechanism (21) through a connecting member (22). When the breaking coil (20) shuts off a main contact (9), the switching mechanism (21) turns off the switch (12) so as to cut off the current flowing through the detection wires (8).
Description
Technical field
The present invention relates to a kind of circuit-breaker, it has the sensor circuit that is used for detection terminal contact fault.
Background technology
In circuit-breaker, if electrically contacting owing to screw rod is loosening between the terminal component of circuit breaker becomes unstable, then unsettled contact may cause heat to produce, and is accompanied by arc discharge.For fear of the thermal accumlation in the terminal of circuit-breaker, a kind of circuit-breaker has been proposed, it uses sensor circuit to come contact situation between the detection terminal parts, and detects cut-out main contacts when coming in contact fault when it.For example, as shown in Figure 2, Japanese publication not among the unexamined patent application No.2009-245836 disclosed circuit-breaker comprise that two ends are connected in the terminal screw rod 5 of power supply side terminal and the sensor circuit 11 of terminal base 6, and determine the generation of contact fault in power supply side terminal based on potential difference between these terminal components.
Problem to be solved by this invention
If terminal is a screw-type, contact fault may occur in load side terminal and power supply side terminal in the circuit-breaker.According to traditional circuit-breaker, because sensor circuit 11 is connected in two terminal components 5 and 6 of power supply side terminal, so the detection in the contact fault of load side terminal will need for the both sides terminal all provides sensor circuit, this causes the circuit structure of circuit breaker complicated more.
Summary of the invention
In view of the problem of pointing out above, an important goal of the present invention provides a kind of circuit-breaker, and it can be with the contact fault of single-sensor electric circuit inspection load side terminal and power supply side terminal.
The means of dealing with problems
In order to solve the problem of pointing out above, the invention provides a kind of circuit-breaker, comprising: at least one comprises the power supply side terminal of a plurality of terminal components; At least one comprises the load side terminal of a plurality of terminal components; Be provided at the supply lines between power supply side terminal and the load side terminal; Be provided at the main contacts in the supply lines; Be provided between power supply side terminal and the load side terminal so that the detection line arranged side by side with supply lines; And be provided at sensor circuit in the detection line.In circuit-breaker, sensor circuit detect between each terminal component of power supply side terminal or load side terminal contact with do not contact.
Circuit breaker in a circuit according to the invention, because sensor circuit is connected to power supply side terminal and load side terminal by detection line, so the single-sensor circuit is enough to detect the contact fault in the either side terminal, and the contact fault in other electric coupling and connecting elements, this has comprised the contact fault in the main contacts of supply lines.In addition, when main contacts disconnected, switch was suitable for the interrupt flow electric current of line after testing.This provides the accurate detection of the contact fault in each parts of circuit-breaker, and does not damage the insulation between main circuit and the secondary circuit.
In one aspect, circuit-breaker comprises also and is used for the interrupt flow switch of the electric current of line after testing that this switch is installed in the detection line and connects with sensor circuit.
On the other hand, circuit-breaker also comprises the switching mechanism that is used to disconnect with Closing Switch, and wherein when sensor circuit detects not contact between the terminal component, this switching mechanism disconnects the more Zao moment cut-off switch of main contacts than mechanism.
The present invention also provides a kind of circuit-breaker, comprising: a plurality of power supply side terminals, and each all comprises a plurality of terminal components; A plurality of load side terminal, each all comprises a plurality of terminal components; Be provided at the supply lines between power supply side terminal and the load side terminal separately; Be provided at the main contacts in every supply lines; Be provided between each power supply side terminal and the load side terminal separately so that the detection line arranged side by side with supply lines; Be provided at the sensor circuit in every detection line; And the single control circuit that is connected with each sensor circuit; Wherein sensor circuit detect between each terminal component of power supply side terminal or load side terminal contact with do not contact; And wherein, control circuit comprises and is used for determining decision circuit in the generation of power supply side terminal and load side terminal contact fault based on the output of sensor circuit.
In one embodiment, circuit-breaker also comprises and is used for interrupt flow a plurality of switches of the electric current of line after testing, and each in described a plurality of switches all is installed in the detection line one, so that connect with sensor circuit separately.
In one embodiment, circuit-breaker also comprises the single switching mechanism that is used for disconnecting simultaneously with closed each switch, and wherein when decision circuit determine power supply side terminal and load side terminal one of at least in when contact fault has taken place, this switching mechanism disconnects each switch disconnecting the more Zao moment of main contacts than this mechanism.
Description of drawings
Attribute for a more complete understanding of the present invention and target, will be with reference to following detailed and accompanying drawing, in the accompanying drawings:
Fig. 1 is the line map of circuit-breaker according to an embodiment of the invention; And
Fig. 2 is the line map of the sensor circuit of conventional electric circuit breakers.
Embodiment
Hereinafter, will embodiments of the invention be described based on the accompanying drawing 1 that the circuit-breaker 1 that is used for the single-phase three-wire circuit is shown.Circuit-breaker 1 comprises circuit breaker box 2, at three power supply side terminals 3 of circuit breaker box 2 one ends and in three load side terminal 4 of circuit breaker box 2 other ends.Each of power supply side terminal 3 all comprises each terminal component, such as terminal base 6 and the terminal screw rod 5 that is used for the power line (not shown) is fixed to terminal base 6.Similarly, each of load side terminal 4 all comprises each terminal component, such as terminal base 6 and the terminal screw rod 5 that is used for load distribution (not shown) is fixed to terminal base 6.
Circuit-breaker 1 also comprises three supply lines (pressure-wire L1 and L2, and neutral line N) 7, is coupled with a supply lines between every pair of power supply side terminal and load side terminal.In addition, between power supply side terminal 3 and load side terminal 4, three detection lines 8 are installed side by side with supply lines 7 separately.On every supply lines 7, provide the main contacts 9 that is used to disconnect with closed circuit, and to the bimetal leaf 10 (only in pressure-wire L1 and L2) of overcurrent sensitivity.Be used between detection terminal parts 5 and 6 and the contact and the sensor circuit 11 that does not contact at main contacts 9 places all being equipped with on every detection line 8.In addition, switch 12 is installed in every detection line 8, is series at sensor circuit 11 separately, is used for the interrupt flow electric current of line 8 after testing.
Three sensor circuits 11 are connected to control circuit 14 through integrated input circuit 13.Control circuit 14 comprises: power circuit 15 is used for from the circuit acquisition electric energy of the primary side of main contacts 9; Average circuit 16 is used for determining from the output of sensor circuit 11 mean value of each sensor circuit 11; Decision circuit 17 is used for mean value and threshold to determine whether to come in contact fault; Holding circuit 18 is used for result of determination is kept predetermined amount of time; And output circuit 19, be used in this time period, cutting off instruction to breaking coil 20 outputs.
Each switch 12 all is installed on separately the detection line 8, between sensor circuit 11 and power supply side terminal 3, and is suitable for being driven by the switching mechanism 21 that also is provided in the circuit-breaker 1.The switching mechanism 21 that is used for switch is coupled in handle 23, breaking coil 20 and the parts relevant with tripping operation through coupling member 22.Breaking coil 20 cuts off main contacts 9 in response to cutting off instruction, and switching mechanism 21 is suitable for a little earlier in the moment cut-off switch 12 of the tripping operation of main contacts 9.Should be noted that the input-output buffer circuit that uses photoelectrical coupler 24 can be used for sensor circuit 11 as shown in Figure 2, although it is not limited thereto or any other concrete structure.
According to the circuit-breaker 1 of as above constructing, each sensor circuit 11 line 8 after testing is connected to the terminal 3 of mains side and the terminal 4 of load-side.This allows single-sensor circuit 11 to detect contact fault between each terminal components 5 and 6 of any terminals 3 and 4, and other electric coupling in wide region more and the contact fault in the connecting elements, this has comprised the contact fault in the main contacts 9 of supply lines 7.And because main contacts 9 is connected in its switch 12 separately, detection line 8 interrupts when supply lines 7 interrupts, so that guarantee the electric insulation between main circuit and the secondary circuit.Thus, above-described simple structure can detect the contact fault in the various parts of circuit-breaker exactly.
Should be noted that circuit breaker is not only applicable to the single-phase three-wire circuit in a circuit according to the invention, also be applicable to the circuit of other types, such as single-phase two-wire circuit and phase three-wire three circuit.In addition, except as above-mentioned embodiment in power line be fixed in the terminal structure of terminal base by the terminal screw rod, make it possible to that one touch type connects and the slotting formula structure that disconnects also can be used as mains side and load side terminal.
Equivalent
The invention is not restricted to aforesaid each embodiment, and, still to keep the mode of spirit of the present invention, still can implement with the layout of the each several part that changes according to demand.
The present invention who has described requires also to expect to be seen claim by the content that patent certificate is protected as new method.
Claims (6)
1. a circuit-breaker (1) comprising:
At least one power supply side terminal (3) comprises a plurality of terminal components (5,6);
At least one load side terminal (4) comprises a plurality of terminal components (5,6);
Supply lines (7) is provided between described power supply side terminal (3) and the described load side terminal (4);
Main contacts (9) is provided in the described supply lines (7);
Detection line is provided between described power supply side terminal (3) and the described load side terminal (4), so that arranged side by side with described supply lines (7); And
Sensor circuit (11) is provided in the described detection line;
Wherein, described sensor circuit (11) detect between each terminal component (5,6) of described power supply side terminal (3) or described load side terminal (4) contact with do not contact.
2. according to the described circuit-breaker of claim 1, also comprise: switch (12), be used for the electric current of interrupt flow through described detection line, described switch is installed in the described detection line and connects with described sensor circuit.
3. according to the described circuit-breaker of claim 2, also comprise: switching mechanism (21), be used for disconnecting and closed described switch, and wherein when described sensor circuit detected not contact between the described terminal component, described switching mechanism disconnected described switch in the moment more Zao than described main contacts.
4. a circuit-breaker (1) comprising:
A plurality of power supply side terminals (3), each all comprises a plurality of terminal components (5,6);
A plurality of load side terminal (4), each all comprises a plurality of terminal components (5,6);
Supply lines (7) is provided between each power supply side terminal (3) and the load side terminal separately (4);
Main contacts (9) is provided in every supply lines;
Detection line (8) is provided between each power supply side terminal (3) and the load side terminal separately (4), so that arranged side by side with described supply lines (7);
Sensor circuit (11) is provided in every detection line (8); And
Single control circuit, described sensor circuit are connected to described single control circuit;
Wherein, described sensor circuit (11) detect between each described terminal component (5,6) of described power supply side terminal (3) and described load side terminal (4) contact with do not contact; And
Wherein, described control circuit comprises decision circuit (17), and described decision circuit (17) is used for determining generation in described power supply side terminal (3) and described load side terminal (4) contact fault based on the output of described sensor circuit (11).
5. according to the described circuit-breaker of claim 4, also comprise: a plurality of switches (12), be used for the electric current of interrupt flow through described detection line, each in described a plurality of switches all is installed in the described detection line one, so that connect with sensor circuit separately.
6. according to the described circuit-breaker of claim 5, also comprise: single switching mechanism (21), be used for disconnecting simultaneously and closed each described switch, and wherein when described decision circuit determine described power supply side terminal (3) and described load side terminal (4) one of at least in when contact fault has taken place, described switching mechanism disconnects each described switch disconnecting the more Zao moment of described main contacts than described mechanism.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-127495 | 2010-06-03 | ||
| JP2010127495A JP2011253744A (en) | 2010-06-03 | 2010-06-03 | Circuit breaker capable of detecting poor contact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102280317A true CN102280317A (en) | 2011-12-14 |
| CN102280317B CN102280317B (en) | 2014-04-09 |
Family
ID=45105699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110154026.8A Active CN102280317B (en) | 2010-06-03 | 2011-06-03 | Circuit breaker capable of detecting contact fault |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2011253744A (en) |
| KR (1) | KR101214770B1 (en) |
| CN (1) | CN102280317B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2671809C2 (en) * | 2013-07-09 | 2018-11-07 | Шнейдер Электрик Эндюстри Сас | Device for decoding the reset of the switch, the drive of the disconnection mechanism of the switch contactors, electric switch and application of the induced current for generation of running indication signal into the initial position |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3278349B1 (en) * | 2015-03-31 | 2020-09-16 | Eaton Intelligent Power Limited | Switchgear cabinet arrangement with improved cut-off in the event of an overload |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001165964A (en) * | 1999-12-09 | 2001-06-22 | Mitsubishi Electric Corp | Circuit breaker with current conduction information- measuring device |
| CN1508832A (en) * | 2002-12-16 | 2004-06-30 | 富士电机株式会社 | Leakage circuit breaker |
| KR100616782B1 (en) * | 2005-05-10 | 2006-08-29 | 송종석 | Leakage current detection and interruption |
| JP2008305764A (en) * | 2007-06-11 | 2008-12-18 | Kawamura Electric Inc | Connection failure detecting circuit of electric wire and circuit breaker |
| JP2009016084A (en) * | 2007-07-02 | 2009-01-22 | Kawamura Electric Inc | Terminal connection failure detecting circuit and circuit breaker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4839772B2 (en) * | 2005-10-21 | 2011-12-21 | 富士電機機器制御株式会社 | Withstand voltage test switch and earth leakage breaker |
-
2010
- 2010-06-03 JP JP2010127495A patent/JP2011253744A/en active Pending
-
2011
- 2011-06-03 KR KR1020110054218A patent/KR101214770B1/en active IP Right Grant
- 2011-06-03 CN CN201110154026.8A patent/CN102280317B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001165964A (en) * | 1999-12-09 | 2001-06-22 | Mitsubishi Electric Corp | Circuit breaker with current conduction information- measuring device |
| CN1508832A (en) * | 2002-12-16 | 2004-06-30 | 富士电机株式会社 | Leakage circuit breaker |
| KR100616782B1 (en) * | 2005-05-10 | 2006-08-29 | 송종석 | Leakage current detection and interruption |
| JP2008305764A (en) * | 2007-06-11 | 2008-12-18 | Kawamura Electric Inc | Connection failure detecting circuit of electric wire and circuit breaker |
| JP2009016084A (en) * | 2007-07-02 | 2009-01-22 | Kawamura Electric Inc | Terminal connection failure detecting circuit and circuit breaker |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2671809C2 (en) * | 2013-07-09 | 2018-11-07 | Шнейдер Электрик Эндюстри Сас | Device for decoding the reset of the switch, the drive of the disconnection mechanism of the switch contactors, electric switch and application of the induced current for generation of running indication signal into the initial position |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20110133006A (en) | 2011-12-09 |
| KR101214770B1 (en) | 2012-12-21 |
| CN102280317B (en) | 2014-04-09 |
| JP2011253744A (en) | 2011-12-15 |
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