CN109428314A - Intelligent switch device and switchgear - Google Patents
Intelligent switch device and switchgear Download PDFInfo
- Publication number
- CN109428314A CN109428314A CN201710723263.9A CN201710723263A CN109428314A CN 109428314 A CN109428314 A CN 109428314A CN 201710723263 A CN201710723263 A CN 201710723263A CN 109428314 A CN109428314 A CN 109428314A
- Authority
- CN
- China
- Prior art keywords
- breaker
- control unit
- load
- switching device
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
-
- 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
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
- H02H3/042—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned combined with means for locating the fault
Abstract
The present invention provides a kind of intelligent switch device and switchgears.The switching device includes: a breaker, is connected between power supply and load, and is threaded off to disconnect the connection between power supply and load or be overlapped with the connection between turn-on power and load；One controller, is connected to breaker, wherein when controller receives the trip signal from breaker, whether controller detection load is short-circuit, and sends breaker for coincidence signal according to testing result, so that breaker is overlapped.It is thereby achieved that the automatic detection and exclusion of transient fault.
Description
Technical field
The present invention relates to a kind of intelligent switch device and switchgears.
Background technique
Low-voltage circuit breaker is widely used in the distribution system of such as low-tension switch cabinet, with for prevent by line short,
On fire and electric shock caused by the line faults such as overload.When such line fault occurs, circuit breaker tripping, to cut off electricity
Connection between source and load.After circuit breaker tripping, maintenance personnel checks tripping reason, and is being adjusted or is repairing it
It is overlapped breaker manually afterwards, power supply is connected to load.
Transient fault can also cause circuit breaker tripping, so maintenance personnel can be overlapped breaker first, if breaker
It threads off again, then maintenance personnel can carry out subsequent examination.If breaker is not threaded off again, maintenance personnel can be determined
It is tripping caused by transient fault, and can directly terminates to check.
Summary of the invention
Present invention seek to address that above-mentioned and/or other technologies problem, and one kind is provided intelligently it can detect and exclude wink
When failure intelligent switch device and switchgear.
Accoding to exemplary embodiment, a kind of switching device includes: a breaker, is connected between power supply and load, and take off
Button is to disconnect the connection between power supply and load or be overlapped with the connection between turn-on power and load；One controller, is connected to
Breaker, wherein when controller receives the trip signal from breaker, whether controller detection load is short-circuit, and root
Breaker is sent by coincidence signal according to testing result, so that breaker is overlapped.Therefore, when causing the failure of circuit breaker tripping to be
When transient fault, automatically breaker can be made to be overlapped.
Controller includes: load short circuits detection unit, is connected to the output end for being connected to load of breaker, and is detected negative
It whether short-circuit carries；Control unit is connected to load short circuits detection unit and breaker, wherein comes from when control unit receives
When the trip signal of breaker, whether control unit controls load short circuits detection unit detection load short-circuit and negative detecting
When carrying without short circuit, breaker is sent by coincidence signal.
Second after control unit receives trip signal for the first time and sends breaker for coincidence signal for the first time
Secondary when receiving trip signal, control unit determines to be received trip signal and receives between trip signal for the second time for the first time
Interval time whether be more than the scheduled time, when control unit determine interval time be more than the scheduled time when, control unit
It whether short-circuit controls load short circuits detection unit detection load, and sends coincidence signal to when detecting load without short circuit
Breaker.Therefore, whether can be threaded off immediately by breaker after automatic reclosing circuit breaker to judge whether failure is instantaneous event
Barrier.
Controller further include: warning unit (235) is connected to control unit, wherein when control unit determines interval time
When being not above the scheduled time, control unit control warning unit is alerted.
The controller further include: counter (237) is connected to control unit, when control unit receives trip signal
When, control unit determines whether the count results of counter are original state, and is determining that count results are the feelings of original state
Breaker is sent by coincidence signal under condition.When control unit sends coincidence signal, control unit is by the counting knot of counter
Fruit changes into the state different from original state, and resets to the count results of counter just after by the scheduled time
Beginning state.The switching device includes: warning unit (235), is connected to control unit, wherein determines and counts in control unit
As a result in the case where being not original state, control unit control warning unit is alerted.
Therefore, it can be alerted when determining failure not is transient fault.
Breaker includes the multiple output ends for being connected to a load, and load short circuits detection unit is connected to the multiple defeated
It is whether short-circuit each other to detect the multiple output end for outlet, and will test result and provide to control unit.The breaker
It is moulded case circuit breaker or air-break circuit-breaker.
According to another exemplary embodiment, a kind of switchgear includes switching device as described above.
Switching device and switchgear accoding to exemplary embodiment can intelligently according to load, whether short circuit be broken
The reclosing operation of road device determines the line in load whether to thread off again in a short time according to breaker after reclosing operation
Road failure is not transient fault.Therefore, the detection and exclusion of transient fault can be realized in an automated way.Furthermore, it is possible to
Determination is alerted when not being transient fault.
Detailed description of the invention
The following drawings are only intended to schematically illustrate and explain the present invention, not delimit the scope of the invention.Wherein,
Fig. 1 is the schematic block diagram for showing switchgear accoding to exemplary embodiment；
Fig. 2 is the schematic diagram for showing switching device accoding to exemplary embodiment；
Fig. 3 is the flow chart for showing intelligent automatic reclosing method accoding to exemplary embodiment.
Description of symbols:
100 cabinet bodies
200 switching devices
210 breakers
230 controllers
231 load short circuits detection unit, 233 control unit, 235 warning unit, 237 counter
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, this hair of Detailed description of the invention is now compareed
Bright specific embodiment.
Fig. 1 is the schematic block diagram for showing switchgear accoding to exemplary embodiment.As shown in fig. 1, according to exemplary
The switchgear of embodiment may include cabinet body 100 and switching device 200.
Cabinet body 100 can accommodate the various elements of switchgear, for example, switching device 200.Cabinet body 100 can also be receiving
Switchgear various elements relative to outside provide electromagnetic shielding.
Switching device 200 may be mounted in cabinet body 100.Switching device 200 can connect between power supply and load.Such as
Shown in Fig. 1, power supply can be the three phase mains for including the end L1, the end L2, the end L3 and N-terminal, and load can be connected to be corresponding
The end L1, the end L2, the end L3 and N-terminal, switching device 200 can connect between them.Switching device 200 can switch over, from
And power supply can be connected to load to power to the load.As shown in fig. 1, switching device 200 may include 210 He of breaker
Controller 230.
Breaker 210 can connect between power supply and load.Breaker 210 can be low-voltage circuit breaker.Breaker 210
Can thread off with disconnect power supply and load between connection or breaker 210 can be overlapped (for example, automatic reclosing) be connected
Connection between power supply and load.Here, breaker 210 can be moulded case circuit breaker or air-break circuit-breaker.
Controller 230 may be coupled to breaker 210.Here, controller 230 may include the control of such as LOGO PLC
Unit.Accoding to exemplary embodiment, controller 230 can receive trip signal from breaker 210.When receiving trip signal
When, whether controller 230 can detecte load short-circuit, and can send breaker 230 for coincidence signal according to testing result,
So that breaker is overlapped.
Fig. 2 is the schematic diagram for showing switching device accoding to exemplary embodiment.As shown in Figure 2, controller 230 can be with
Including load short circuits detection unit 231 and control unit 233.
Load short circuits detection unit 231 may be coupled to the output end for being connected to load of breaker 210.Load short circuits inspection
Whether survey unit 231 can detecte load short-circuit.As shown in Figure 2, breaker 210 may include be connected to one load it is more
A output end.In this case, load short circuits detection unit 231 can be connected respectively to multiple output ends, and can examine
It is whether short-circuit each other to survey the multiple output end.Referring to Fig. 2, load short circuits detection unit 231 may include switch unit,
DC power supply and resistor.Switch unit can switch over, by DC power supply and resistor be connected in series to respectively two output ends it
Between.In this way, load short circuits detection unit 231 can be by the voltage V at the both ends of resistor0As load whether Duan Lu detection knot
Fruit is provided to control unit 233.
Control unit 233 may be coupled to load short circuits detection unit 231 and breaker.Here, control unit 233 can be with
By the LOGO of such as Siemens company！PLC is realized.Control unit 233 can receive the trip signal from breaker 210.
When receiving trip signal, whether control unit 233 can control the detection of load short circuits detection unit 231 load short-circuit.Ginseng
According to Fig. 2, load short circuits detection unit 231 can be by the voltage V at the both ends of resistor0As load whether Duan Lu testing result
Control unit 233 is provided.At this moment, control unit 233 can determine the resistance of load according to the following formula:
RLoad=(Vdc×R/V0)-R
Wherein, RLoadIt is the resistance of load, VdcIt is the voltage at DC power supply both ends, R is the resistance of resistor, V0It is resistor
The voltage at both ends.For example, when control unit 233 determines load without short circuit for example, RLoadFor predetermined value or RLoadWhen not equal to 0,
Load can be determined without short circuit.
When control unit 233 determines load without short circuit, control unit 233 can send breaker for coincidence signal
210.Breaker 210 can carry out reclosing operation according to coincidence signal, so that power supply is connected to load.
Accoding to exemplary embodiment, when breaker 210 is threaded off because of the failure in the route loaded, controller 230
It can intelligently determine that failure may be transient fault without short circuit according to load, and therefore control breaker 210 carries out weight
Closing operation.On the other hand, if it is determined that load short circuits then mean that the failure in the route of load is not transient fault.Therefore,
Controller 230 can not send coincidence signal to breaker, but be alerted.For example, control accoding to exemplary embodiment
Device 230 processed may include warning unit 235.Here, warning unit 235 can provide vision or aural alert.For this purpose, warning is single
Member 235 may include light emitting device, display device, and/or loudspeaker etc..
Breaker 210 may thread off again after being overlapped according to the coincidence signal that control unit 233 provides.Control unit
233 can according to first time be overlapped with is overlapped again between interval time to determine whether again to breaker 210 send weigh
Close signal.For this purpose, controller may include counter 237, to record the number for receiving coincidence signal.
If interval time is very short, that is, breaker 210 takes off again immediately after receiving coincidence signal for the first time and being overlapped
Button, then might mean that other failures in loaded line there are non-instantaneous failure.At this moment, control unit 233 can not be again
Send coincidence signal.When control unit 233 determines that interval time is not above the scheduled time, control unit 233 can be controlled
Warning unit 235 processed is alerted.
On the other hand, if interval time is very long, that is, breaker 210 is after receiving coincidence signal for the first time and being overlapped
It threads off again by long time, then might mean that in loaded line and break down again.At this point, control unit 233 can
To repeat aforesaid operations, whether the control detection of load short circuits detection unit 231 load is short-circuit, and is detecting load without short circuit
When by coincidence signal send breaker 210.
The operation of controller 230 is specifically described below with reference to Fig. 3.Fig. 3 is the intelligence shown accoding to exemplary embodiment
The flow chart of automatic reclosing method.
Firstly, in operation S301, control unit 233 can receive the trip signal of arrival self-blocking device 210.
Then, in operation S303, control unit 233 can determine the counting for being connected to the counter 237 of control unit 233
It as a result whether is original state, for example, 0.If the count results of counter 237 are original state (S303: yes), operating
S335, control unit 233 control load short circuits detection unit 231 and are detected, to determine whether load is short-circuit.
If control unit 233 determines load short circuits without short-circuit (S305: no), in step S307, control unit 233
Coincidence signal can be sent to breaker 210.Meanwhile control unit 233 can be by the count results of counter 237 from initial shape
State changes into the state different from original state, for example, changing into 1 from 0.
Then, after by the scheduled time, control unit 233 can be reset to the count results of counter initially
State, for example, changing into 0 (operation S309) from 1.
Another party, if control unit 233 determines that the count results of counter 237 are not original states, for example, 1
(S303: no), then in operation S311, control unit 233 can control warning unit 235 and be alerted.Alternatively, if control is single
Member 233 determines load short circuits (S305: yes), then control unit 233 can control warning unit 235 and be alerted (S311).
Switching device and switchgear accoding to exemplary embodiment can intelligently according to load, whether short circuit be broken
The reclosing operation of road device determines the line in load whether to thread off again in a short time according to breaker after reclosing operation
Road failure is not transient fault.Therefore, the detection and exclusion of transient fault can be realized in an automated way.Furthermore, it is possible to
Determination is alerted when not being transient fault.
Although not each embodiment only includes one it should be appreciated that this specification describes according to various embodiments
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solutions in the various embodiments may also be suitably combined for bright book, and forming those skilled in the art can be with
The other embodiments of understanding.
The foregoing is merely the schematical specific embodiment of the present invention, the range being not intended to limit the invention.It is any
Those skilled in the art, made equivalent variations, modification and combination under the premise of not departing from design and the principle of the present invention,
It should belong to the scope of protection of the invention.
Claims (10)
1. switching device (200), which is characterized in that the switching device includes:
One breaker (210) is connected between power supply and load, and is threaded off to disconnect connection or coincidence between power supply and load
With the connection between turn-on power and load；
One controller (230), is connected to breaker, wherein when controller receives the trip signal from breaker, control
Whether device detection load is short-circuit, and sends breaker for coincidence signal according to testing result, so that breaker is overlapped.
2. switching device as described in claim 1, which is characterized in that controller includes:
One load short circuits detection unit (231), be connected to breaker is connected to the output end of load, and whether detect load short
Road；
One control unit (233), is connected to load short circuits detection unit and breaker, wherein comes from when control unit receives
When the trip signal of breaker, whether control unit controls load short circuits detection unit detection load short-circuit and negative detecting
When carrying without short circuit, breaker is sent by coincidence signal.
3. switching device as claimed in claim 2, which is characterized in that when control unit receives trip signal and for the first time
It once sends coincidence signal to after breaker when receiving trip signal for the second time, control unit determines to be received for the first time
Whether trip signal and the interval time received between trip signal for the second time are more than the scheduled time, when control unit determines
When interval time is more than the scheduled time, whether control unit controls load short circuits detection unit detection load short-circuit, and is examining
Breaker is sent by coincidence signal when measuring load without short circuit.
4. switching device as claimed in claim 3, which is characterized in that controller further include:
One warning unit (235), is connected to control unit,
Wherein, when control unit determines that interval time is not above the scheduled time, control unit controls warning unit and carries out
Warning.
5. switching device as claimed in claim 3, which is characterized in that the controller further include:
One counter (237), is connected to control unit,
When control unit receives trip signal, control unit determines whether the count results of counter are original state, and
Breaker is sent by coincidence signal in the case where determining that count results are original state.
6. switching device as claimed in claim 5, which is characterized in that wherein, when control unit sends coincidence signal, control
The count results of counter are changed into the state different from original state by unit, and will be counted after by the scheduled time
The count results of device reset to original state.
7. switching device as claimed in claim 6, which is characterized in that the switching device includes:
One warning unit (235), is connected to control unit,
Wherein, in the case where it is original state that control unit, which determines count results not, control unit controls warning unit and carries out
Warning.
8. switching device as claimed in claim 2, which is characterized in that breaker includes the multiple outputs for being connected to a load
End, load short circuits detection unit is connected to the multiple output end, detect the multiple output end each other whether short circuit, and
It will test result to provide to control unit.
9. switching device as described in claim 1, which is characterized in that the breaker is that moulded case circuit breaker or air are disconnected
Road device.
10. switchgear, which is characterized in that the switchgear includes:
Switching device (200) as described in any one of claim 1 to claim 9 claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710723263.9A CN109428314A (en) | 2017-08-22 | 2017-08-22 | Intelligent switch device and switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710723263.9A CN109428314A (en) | 2017-08-22 | 2017-08-22 | Intelligent switch device and switchgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109428314A true CN109428314A (en) | 2019-03-05 |
Family
ID=65498739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710723263.9A Pending CN109428314A (en) | 2017-08-22 | 2017-08-22 | Intelligent switch device and switchgear |
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| Country | Link |
|---|---|
| CN (1) | CN109428314A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204497717U (en) * | 2015-03-26 | 2015-07-22 | 青岛飞鹏能源有限公司 | A kind of telegram in reply auto recloser |
| WO2016015348A1 (en) * | 2014-08-01 | 2016-02-04 | 西门子公司 | Power distribution terminal capable of determining fault type and determination method thereof |
| CN205229370U (en) * | 2015-12-23 | 2016-05-11 | 厦门大恒科技有限公司 | Circuit fault automated inspection's coincidence arrangement |
| CN106159873A (en) * | 2015-03-10 | 2016-11-23 | 江苏苏益电器股份有限公司 | A kind of condition for validity evaluator of residual current circuit breaker automatic reclosing |
| CN107039214A (en) * | 2017-04-14 | 2017-08-11 | 上海麦豆电气有限公司 | Automatic fault detection and the reclosing shown with liquid crystal display after a kind of tripping operation |
-
2017
- 2017-08-22 CN CN201710723263.9A patent/CN109428314A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016015348A1 (en) * | 2014-08-01 | 2016-02-04 | 西门子公司 | Power distribution terminal capable of determining fault type and determination method thereof |
| CN106159873A (en) * | 2015-03-10 | 2016-11-23 | 江苏苏益电器股份有限公司 | A kind of condition for validity evaluator of residual current circuit breaker automatic reclosing |
| CN204497717U (en) * | 2015-03-26 | 2015-07-22 | 青岛飞鹏能源有限公司 | A kind of telegram in reply auto recloser |
| CN205229370U (en) * | 2015-12-23 | 2016-05-11 | 厦门大恒科技有限公司 | Circuit fault automated inspection's coincidence arrangement |
| CN107039214A (en) * | 2017-04-14 | 2017-08-11 | 上海麦豆电气有限公司 | Automatic fault detection and the reclosing shown with liquid crystal display after a kind of tripping operation |
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Application publication date: 20190305 |