CN110137043A - A kind of limiting device preventing the anti-power transmission of low pressure - Google Patents
A kind of limiting device preventing the anti-power transmission of low pressure Download PDFInfo
- Publication number
- CN110137043A CN110137043A CN201910554814.2A CN201910554814A CN110137043A CN 110137043 A CN110137043 A CN 110137043A CN 201910554814 A CN201910554814 A CN 201910554814A CN 110137043 A CN110137043 A CN 110137043A
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- China
- Prior art keywords
- low pressure
- power transmission
- air switch
- preventing
- limiting device
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/06—Distinguishing marks, e.g. colour coding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2239/00—Miscellaneous
- H01H2239/03—Avoiding erroneous switching
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The present invention provides a kind of limiting devices for preventing the anti-power transmission of low pressure, including limit fastener, are installed on air switch, and have Warning board；Wherein, limit fastener includes pedestal and the extension end for being used to clamp air switch for connecting and stretching out with pedestal both ends, and base inner wall is equipped with the limiting slot for blocking air switch operation handle.The limit fastener limit fastener with warning sign that a kind of limiting device preventing the anti-power transmission of low pressure provided by the invention is installed on air switch by setting, the case where user can be prevented to be closed privately to air switch without knowing it, can effectively avoid low pressure anti-power transmission generation.
Description
Technical field
It is more specifically to be related to a kind of limit for preventing the anti-power transmission of low pressure the invention belongs to prevent anti-power transmission technical field
Position device.
Background technique
Anti- power transmission refers to that power supply is reversed through improper path in the case that safety measure is not careful or destroyed
The phenomenon that sending.Anti- power transmission is strictly forbidden in operation power work, this kind of situation can cause casualties damages with equipment
Bad accident.
Before the work that power construction personnel carry out 10kv distribution line, it is possible to the anti-electric shock sent of low pressure can be generated,
The generation of this phenomenon in order to prevent, it is desirable that the low pressure after the Circuit Interrupt of entire route, in all working ranges
The switch of outlet necessarily also is in the state of closing.In the prior art, in interruption maintenance, certain customers can set power grid at home
It founds power autonomous (generator) to generate electricity, when power autonomous output electric energy is greater than load electric energy used, electric current can edge
The reversed power transmission of power grid, very big threat is carried out to the safety belt of power construction personnel.In grid power blackout work progress, it is desirable that use
Air switch between family and power grid is in the state of closure, but by practice discovery, user is often in unwitting situation
Under air switch is closed privately or user often ceaselessly checks whether power grid has electricity by closure air switch,
Lack a kind of mark that user's subjectivity can be allowed to watch with alert flag and one kind.
Summary of the invention
The purpose of the present invention is to provide a kind of limiting devices for preventing the anti-power transmission of low pressure, it is intended to solve the prior art
The problem of middle user does not correctly cause anti-power transmission using power autonomous and shortage alert flag by regulation.
To achieve the above object, the technical solution adopted by the present invention is that: provide it is a kind of prevent the anti-power transmission of low pressure limit dress
It sets, including limit fastener, is installed on air switch, and have Warning board；
The limit fastener includes that pedestal and two connect with the pedestal both ends respectively and stretch out, for being installed on sky
Extension end on the outside of air cock, the base inner wall are equipped with the limiting slot for blocking air switch operation handle.
It further, further include detector, the detector is installed between air switch and power grid, for detecting power grid
Whether there is electric current to pass through；
Controller, between air switch and the detector, for receiving the signal of the detector to control sky
The disconnection of air cock.
Further, the detector includes:
Shell；
Iron core is fixedly installed in the inside of the shell；
Coil, is wrapped in the periphery of the iron core, and two free ends of the coil are respectively used to be connected with power grid；And
Armature, positioned at the side of the iron core, one end of the armature has the first contact jaw, and other end abutting has bullet
Spring；
Wherein it is additionally provided with the second contact jaw on the shell, first contact jaw can movement by the armature and institute
The second contact jaw is stated to be in contact.
Further, the armature and the housing hinge, hinge joint are located at the middle position of the armature and close to institutes
State one end of spring.
Further, the one end of the spring far from the armature and the cage connection.
Further, first contact jaw and second contact jaw pass through the external controller of conducting wire.
Further, the controller is electrically connected with air switch and the detector respectively.
Further, the controller input terminal and the detector are electrically connected, the output end and sky of the controller
Air cock is electrically connected.
Further, the controller is also connected with the instruction for facilitating staff's subjectivity to check whether power grid is powered
Lamp.
Further, the indicator light includes red light for showing grid power blackout state and for showing that power grid is powered
The green light of state.
A kind of beneficial effect of limiting device preventing the anti-power transmission of low pressure provided by the invention is: with prior art phase
Than a kind of limiting device for preventing the anti-power transmission of low pressure of the present invention is equipped with limit fastener, and the extension end of pedestal two sides connection clamps
On air switch, limiting slot is equipped in pedestal, the operation handle for the air switch that limiting slot can will be switched off limits, and limits
Position buckle can allow user according to rule with warning sign to prevent user to be closed in the case where unknown to air switch
Surely electricity consumption is carried out, the generation of the anti-power transmission of low pressure can be effectively avoided；Opening for the circuit between power grid and user can be changed in air switch
Conjunction state.A kind of limiting device preventing the anti-power transmission of low pressure provided by the invention is installed on having on air switch by setting
The limit fastener of warning sign can prevent user to be closed privately to air switch without knowing it, can guarantee
Circuit in grid power blackout work progress between power grid and user is in the state disconnected, effectively avoids the anti-power transmission of low pressure
It happens.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for the limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic illustration for the limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention；
Fig. 3 is a kind of detector structural representation for the limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
Figure；
Fig. 4 is a kind of limit fastener structural representation for the limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
Figure；
Fig. 5 is a kind of limit fastener side view structure for the limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
Schematic diagram；
In figure: 10, air switch；20, limit fastener；21, pedestal；211, limiting slot；22, extension end；30, detector；
31, shell；32, iron core；33, coil；34, armature；35, spring；36, the first contact jaw；37, the second contact jaw；40, it controls
Device；41, indicator light；411, red light；412, green light.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
Also referring to Fig. 1 to Fig. 5, now to a kind of limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
It is illustrated.A kind of limiting device preventing the anti-power transmission of low pressure, including limit fastener 20, are installed on air switch 10, and band
There is Warning board；Wherein, the limit fastener 20 includes pedestal 21 and connect with 21 both ends of pedestal and that stretches out is used for
The extension end 22 of air switch 10 is clamped, 21 inner wall of pedestal is equipped with the limiting slot for blocking 10 operation handle of air switch
211。
A kind of limiting device preventing the anti-power transmission of low pressure provided by the invention, working method are as follows: when power grid is stopped
When electric-examination is repaired, needs for air switch 10 to be closed, limit fastener 20 is installed on air switch 10 again at this time, and warning sign
In write the caveat of " hot work in progress please don't be closed ".
Limit fastener 20 can be by the outer profile of scanning air switch 10, and then the method for 3D printing is made；It can also pass through
The mode of injection molding is made；Or other methods are made.
Warning sign is set to the outside of pedestal 21, checks convenient for user.Warning sign Pasting can also pass through on pedestal 21
Screw is fixed on pedestal 21 or other fixed forms.
A kind of limiting device preventing the anti-power transmission of low pressure provided by the invention, compared with prior art, the present invention are a kind of anti-
Only the limiting device of the anti-power transmission of low pressure is equipped with limit fastener 20, and the extension end 22 of 21 two sides of pedestal connection is installed on air switch
On 10, limiting slot 211 is equipped in pedestal 21, the operation handle for the air switch 10 that limiting slot 211 can will be switched off limits, and
Limit fastener 20 has warning sign, to prevent user to be closed in the case where unknown to air switch 10, can allow user
Electricity consumption is carried out according to the rules, can effectively avoid the generation of the anti-power transmission of low pressure.Air switch 10 can be changed between power grid and user
The folding condition of circuit.A kind of limiting device preventing the anti-power transmission of low pressure provided by the invention is installed on air switch by setting
The limit fastener 20 with warning sign on 10 can prevent user from carrying out privately to air switch 10 without knowing it
Closure can guarantee that the circuit in grid power blackout work progress between power grid and user is in the state disconnected, effectively avoid
The case where low pressure anti-power transmission, occurs.
Limit fastener 20 include pedestal 21 and connect and stretches out with 21 both ends of pedestal be used for clamp air switch 10
Extension end 22, using pedestal 21 and both ends connection and stretch out extension end 22 by the way of, it is ensured that 20 inner cavity of limit fastener with
The shell 31 of air switch 10 can match clamping just, and structure is simple, convenient for user installation and remove.Pedestal 21
Inner wall is equipped with the limiting slot 211 for blocking 10 operation handle of air switch, and limiting slot 211 can be by the manipulator of air switch 10
Handle limits, and guarantees that the limit handle of air switch 10 is constantly in closed state or off-state (because of air switch 10
Limit handle off-state and closed state be symmetrical structure, limit fastener 20 can by rotation to two state distinguish
Limited), of simple structure and strong practicability.
Also referring to Fig. 1 to Fig. 5, as a kind of limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
A kind of specific embodiment, further include detector 30 and controller 40.Detector 30 be installed on air switch 10 and power grid it
Between, for detecting whether power grid has electric current to pass through；Controller 40 is between air switch 10 and the detector 30, for connecing
The signal of the detector 30 is received to control the disconnection of air switch 10.Detector 30 can detect whether power grid is powered, Jin Erneng
The information that enough will test passes to controller 40, and controller 40 can receive the detection signal of detector 30 and control air switch 10
Disconnection, to guarantee that circuit during grid power blackout is constructed, between user and power grid is in closed state, while
Can be realized user household it is power autonomous caused by electricity when being greater than load institute electricity consumption, electric current will not occur that low pressure is counter to be sent
Situation.
Also referring to Fig. 1 to Fig. 5, as a kind of limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
A kind of specific embodiment, detector 30 include shell 31, iron core 32, coil 33 and armature 34.Wherein shell 31；Iron core
32, it is fixedly installed in the inside of shell 31；Coil 33 is wrapped in the periphery of iron core 32, two free ends of coil 33 and power grid
It is connected；Armature 34, positioned at the side of iron core 32, one end of armature 34 has the first contact jaw 36, and the other end is connected with spring 35.
Whether detector 30 is used to detect in power grid to be powered, and will test result and pass to controller 40, and principle is simple, in reality
Use Limitation fruit is preferable.Coil 33 by being wrapped in 32 periphery of iron core forms electromagnet, and grid power blackout makes the electric current in power grid
Transient change occurs, by the electromagnetic induction of electromagnet, the armature 34 positioned at 32 side of iron core is attracted by electromagnet, and then makes to hold in the mouth
First contact jaw 36 of 34 one end of iron is mobile to a direction, and movement structure is compact.In addition the other end of armature 34 is connected with bullet
Spring 35, it is ensured that when power grid is powered, armature 34 is constantly in the state of disconnection with electromagnet, and structure is simple.Detector 30
It further include the second contact jaw 37 for being contacted with the first contact jaw 36, when the electromagnetism that armature 34 is formed by coil 33 and iron core 32
After iron attracts, the first contact jaw 36 positioned at 34 one end of armature is mobile to 37 direction of the second contact jaw, and abuts against, and structure is former
Reason is simple, and the effect actually used is preferable.
Also referring to Fig. 1 to Fig. 5, as a kind of limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
A kind of specific embodiment, armature 34 and shell 31 are hinged, and hinge joint is located at the middle position of armature 34 and close spring 35
One end, this kind of structure make armature 34 form a lever around hinge joint, and the arm of force of 35 one end of spring is shorter, the first contact jaw
36 one end arm of force is longer, it is ensured that the stress of the first contact jaw 36 is smaller, and sensitivity can enhance.
Also referring to Fig. 1 to Fig. 5, as a kind of limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
A kind of specific embodiment, one end of spring 35 connect with armature 34, and the other end is connect with shell 31, and spring 35 can a vertical pulling
Moving armature 34, to guarantee in grid power blackout, armature 34 is constantly in the state of disconnection, one end connection of spring 35 with iron core 32
Shell 31, it is ensured that opposite stress point is conducive to the stability for improving spring 35 and armature 34.
Also referring to Fig. 1 to Fig. 5, as a kind of limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
A kind of specific embodiment, detector 30 further includes the second contact jaw 37 for contacting with the first contact jaw 36, and first connects
Contravention 36 and the second contact jaw 37 are by conducting wire external controller 40, when the electromagnet that armature 34 is formed by coil 33 and iron core 32
After attraction, the first contact jaw 36 positioned at 34 one end of armature is mobile to 37 direction of the second contact jaw, when the first contact jaw 36 and the
After two contact jaws 37 abut, the first contact jaw 36 and the second contact jaw 37 and external controller 40 composition are closed back
Road, and then the signal of power failure is passed into controller 40, structure is relatively simple, and the effect actually used is preferable.
Also referring to Fig. 1 to Fig. 5, as a kind of limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
A kind of specific embodiment, the controller 40 is electrically connected with air switch 10 and the detector 30 respectively, controller
40 can control the folding of air switch 10 by the signal that detector 30 is transmitted to, and far from simply, practicability is stronger.
Also referring to Fig. 1 to Fig. 5, as a kind of limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
A kind of specific embodiment, 40 input terminal of controller and detector 30 are electrically connected, can transmit convenient for receiving detector 30
The signal come, the output end and air switch 10 of controller 40 are electrically connected, and can pass to air switch convenient for that will control signal
10。
Also referring to Fig. 1 to Fig. 5, as a kind of limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
A kind of specific embodiment, controller 40 is also connected with for facilitating staff's subjectivity to check whether power grid has the finger of electric current
Show that lamp 41, indicator light 41 can check at any time whether power grid is powered convenient for user, to determine what air switch 10 was opened or was closed
Operation.Indicator light 41, which can also alert the user that, simultaneously disconnects when air switch 10 is because of the interruption maintenance of power grid, can be avoided
User re-closes air switch 10 without knowing it.
Also referring to Fig. 1 to Fig. 5, as a kind of limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
A kind of specific embodiment, indicator light 41 includes red light 411 for showing grid power blackout state and for showing power grid
The green light 412 of energized state；When red light 411 lights, as power grid is just in interruption maintenance construction, when green light 412 lights,
Power resumption is completed in as power grid construction, facilitates the state whether being powered for checking power grid of user's subjectivity.
Referring to Figure 2 together to Fig. 3, as a kind of limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
A kind of specific embodiment, detector 30 is installed between air switch 10 and power grid, can be used for detecting whether power grid has electricity
Stream passes through；Detector 30 includes the shell 31 for receiving, and shell 31 is easily installed any position in environment；Iron core 32,
It is fixedly installed in the inside of shell 31；Coil 33 is wrapped in the periphery of iron core 32, and winds along a direction of iron core 32,
Two free ends of coil 33 are connected with power grid, and iron core 32 forms electromagnet with the coil 33 for being wound in 32 periphery of iron core；And
Armature 34 can be strip, can also be to be rodlike, positioned at the side of iron core 32, and one end of armature 34 has the first contact jaw 36, separately
One end is connected with spring 35.Armature 34 and shell 31 are hinged, and hinge joint is located at the middle position of armature 34 and close to spring 35
One end.One end of spring 35 is connect with armature 34, and the other end is connect with shell 31.Detector 30 further includes for contacting with first
Second contact jaw 37 of 36 contact of end, 37 external controller 40 of the first contact jaw 36 and the second contact jaw.
A kind of limiting device preventing the anti-power transmission of low pressure provided in an embodiment of the present invention, the working principle of detector 30
Are as follows:
Grid power blackout makes the electric current in power grid that transient change occur, and by the electromagnetic induction of electromagnet, is located at iron core 32 1
The armature 34 of side is attracted by electromagnet, and then moves first contact jaw 36 of 34 one end of armature to the direction of the second contact jaw 37
It is dynamic, after the first contact jaw 36 is in contact with the second contact jaw 37, the first contact jaw 36 and the second contact jaw 37 and external
Controller 40 constitutes closed circuit, and then the signal of power failure is passed to controller 40.
Also referring to Fig. 1 to Fig. 5, as a kind of limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
A kind of specific embodiment, controller 40 is between air switch 10 and detector 30, for receiving the letter of detector 30
Number to control the disconnection of air switch 10.Controller 40 is electrically connected with air switch 10 and detector 30 respectively.Controller 40
It is also connected with the indicator light 41 for facilitating staff subjective can check whether power grid is powered.Indicator light 41 includes for showing
Show the red light 411 of grid power blackout state and the green light 412 for showing power grid energized state.
A kind of limiting device preventing the anti-power transmission of low pressure provided in an embodiment of the present invention, the working principle of controller 40
Are as follows:
After first contact jaw 36 of detector 30 is in contact with the second contact jaw 37, the first contact jaw 36 and the second contact jaw
37 and external electric wire and controller 40 constitute closed circuit, and then the signal of power failure is passed to controller by detector 30
40, after the input terminal of controller 40 receives the electric signal that detector 30 is transmitted to, action signal is passed into air switch
10, so that air switch 10 disconnects.It needs it is to be noted that detector 30 is by power cut signal with the shape of electric signal after grid power blackout
Formula passes to controller 40, and controller 40 is also connected with indicator light 41, and red light 411 lights, illustrate power grid just in power cut construction,
When green light 412 is bright, illustrate that power grid has been powered.
A kind of limiting device preventing the anti-power transmission of low pressure provided in an embodiment of the present invention, specific working mode are as follows:
Grid power blackout makes the electric current in power grid that transient change occur, and passes through iron core 32 and the coil for being wound in 32 periphery of iron core
The electromagnetic induction of electromagnet composed by 33, the armature 34 positioned at 32 side of iron core is attracted by electromagnet, and then makes armature 34 1
First contact jaw 36 at end is mobile to the direction of the second contact jaw 37, when the first contact jaw 36 is in contact with the second contact jaw 37
Afterwards, the first contact jaw 36 and the second contact jaw 37 and external controller 40 constitute closed circuit, and then by the signal of power failure
Pass to controller 40.
After the input terminal of controller 40 receives the electric signal that detector 30 is transmitted to, action signal is passed into air
Switch 10, so that air switch 10 disconnects.Limit fastener 20 is installed on the air switch 10 being in an off state again at this time,
Operation handle in air switch 10 is placed in the limiting slot 211 in air switch 10, and is write " in warning sign
Construction, please don't be closed " caveat.
After grid power blackout, power cut signal is passed to controller 40, controller 40 by detector 30 as electronic signals
It is also connected with indicator light 41, red light 411 lights, and illustrates power grid just in power cut construction, when green light 412 is bright, illustrates power grid
It is powered.
Referring to Figure 2 together to Fig. 3, as a kind of limiting device for preventing the anti-power transmission of low pressure provided in an embodiment of the present invention
A kind of specific embodiment, detector 30 can also be placed in air switch 10 and household it is power autonomous between, for detecting
The part electric energy that the power autonomous lock of household generates is reversed power transmission, and when having electric current to pass through in circuit, transient change occurs for electric current,
By iron core 32 and the electromagnetic induction for being wound in electromagnet composed by the coil 33 of 32 periphery of iron core, positioned at 32 side of iron core
Armature 34 is attracted by electromagnet, and then keeps first contact jaw 36 of 34 one end of armature mobile to the direction of the second contact jaw 37, when
After first contact jaw 36 is in contact with the second contact jaw 37, the first contact jaw 36 and the second contact jaw 37 and external controller
40 constitute closed circuit, and then the signal of power failure is passed to controller 40.
After the input terminal of controller 40 receives the electric signal that detector 30 is transmitted to, action signal is passed into air
Switch 10, so that air switch 10 disconnects.
Limit fastener 20 is installed on the air switch 10 being in an off state again at this time, by the behaviour in air switch 10
It is placed in the limiting slot 211 in air switch 10 as handle.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of limiting device for preventing the anti-power transmission of low pressure characterized by comprising
Limit fastener is installed on air switch, and has Warning board；
The limit fastener includes that pedestal and two connect respectively and stretched out with the pedestal both ends, opened for being installed on air
The extension end of side outside the Pass, the base inner wall are equipped with the limiting slot for blocking air switch operation handle.
2. a kind of limiting device for preventing the anti-power transmission of low pressure as described in claim 1, which is characterized in that further include:
Detector, the detector is for being installed between air switch and power grid and for detecting whether power grid has electric current logical
It crosses；And
Controller, between air switch and the detector, the signal for receiving the detector is opened with controlling air
The disconnection of pass.
3. a kind of limiting device for preventing the anti-power transmission of low pressure as claimed in claim 2, which is characterized in that the detector packet
It includes:
Shell；
Iron core is fixedly installed in the inside of the shell；
Coil, is wrapped in the periphery of the iron core, and two free ends of the coil are respectively used to be connected with power grid；And
Armature, positioned at the side of the iron core, one end of the armature has the first contact jaw, and other end abutting has spring；
Wherein it is additionally provided with the second contact jaw on the shell, first contact jaw can pass through the movement of the armature and described the
Two contact jaws are in contact.
4. a kind of limiting device for preventing the anti-power transmission of low pressure as claimed in claim 3, which is characterized in that the armature with it is described
Housing hinge, hinge joint are located at the middle position of the armature and one end close to the spring.
5. a kind of limiting device for preventing the anti-power transmission of low pressure as claimed in claim 4, which is characterized in that the spring is far from institute
State armature one end and the cage connection.
6. a kind of limiting device for preventing the anti-power transmission of low pressure as claimed in claim 3, which is characterized in that first contact jaw
Pass through the external controller of conducting wire with second contact jaw.
7. a kind of limiting device for preventing the anti-power transmission of low pressure as claimed in claim 2, which is characterized in that the controller difference
It is electrically connected with air switch and the detector.
8. a kind of limiting device for preventing the anti-power transmission of low pressure as claimed in claim 7, which is characterized in that the controller input
End is electrically connected with the detector, and the output end and air switch of the controller are electrically connected.
9. a kind of limiting device for preventing the anti-power transmission of low pressure as claimed in claim 7, which is characterized in that the controller also connects
It is connected to the indicator light for facilitating staff's subjectivity to check whether power grid is powered.
10. a kind of limiting device for preventing the anti-power transmission of low pressure as claimed in claim 9, which is characterized in that the indicator light packet
Include the red light for showing grid power blackout state and the green light for showing power grid energized state.
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| CN201910554814.2A CN110137043A (en) | 2019-06-25 | 2019-06-25 | A kind of limiting device preventing the anti-power transmission of low pressure |
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| CN201910554814.2A CN110137043A (en) | 2019-06-25 | 2019-06-25 | A kind of limiting device preventing the anti-power transmission of low pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117167A (en) * | 2020-09-18 | 2020-12-22 | 广东电网有限责任公司梅州供电局 | Air switch misoperation prevention device |
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| CN103066585A (en) * | 2012-12-13 | 2013-04-24 | 中国矿业大学 | Power supply detection and abnormal reverse power transmission control device |
| CN203351449U (en) * | 2013-07-30 | 2013-12-18 | 国家电网公司 | Air switch locking warning device |
| CN103928775A (en) * | 2014-03-31 | 2014-07-16 | 国家电网公司 | Transformer substation secondary air switch locking grounded small ground wire |
| CN105490391A (en) * | 2016-01-20 | 2016-04-13 | 国网浙江余姚市供电公司 | House generator inverse power transmission prevention control equipment |
| CN206040502U (en) * | 2016-08-30 | 2017-03-22 | 国家电网公司运行分公司宜宾管理处 | Air switch prevents maloperation safety cover |
| CN107068506A (en) * | 2017-06-02 | 2017-08-18 | 国网辽宁省电力有限公司铁岭供电公司 | The anti-power transmission automatic disconnecting device of power distribution network low pressure |
| CN109243922A (en) * | 2018-10-26 | 2019-01-18 | 浙江达峰科技有限公司 | A kind of electromagnetic relay avoiding one direction vibration failur |
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| CN112117167A (en) * | 2020-09-18 | 2020-12-22 | 广东电网有限责任公司梅州供电局 | Air switch misoperation prevention device |
| CN112117167B (en) * | 2020-09-18 | 2023-05-05 | 广东电网有限责任公司梅州供电局 | Misoperation prevention device for air switch |
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