CN206003673U - The isolation earthing or grounding means of low-pressure side interruption maintenance and maintenance - Google Patents
The isolation earthing or grounding means of low-pressure side interruption maintenance and maintenance Download PDFInfo
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- CN206003673U CN206003673U CN201620790335.2U CN201620790335U CN206003673U CN 206003673 U CN206003673 U CN 206003673U CN 201620790335 U CN201620790335 U CN 201620790335U CN 206003673 U CN206003673 U CN 206003673U
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- 238000012423 maintenance Methods 0.000 title claims abstract description 42
- 238000002955 isolation Methods 0.000 title claims abstract description 19
- 230000003068 static effect Effects 0.000 claims abstract description 33
- 238000009434 installation Methods 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 29
- 238000009413 insulation Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 6
- 230000000994 depressogenic effect Effects 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 230000001939 inductive effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
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Abstract
A kind of low-pressure side interruption maintenance and the isolation earthing or grounding means of maintenance, including the double-throw knife switch being connected between power load side and supply side, double-throw knife switch includes plug-in strip, static contact, the first moving contact and the second moving contact, one end of plug-in strip is hinged on static contact, first moving contact connects supply side, second moving contact is used for connecting ground wire, the plug-in strip one end is rotated around static contact, when plug-in strip move to the first moving contact close with the first moving contact contact when, supply side is powered to power load side by the first moving contact, plug-in strip and static contact；When the first moving contact is left in plug-in strip counter motion, the first moving contact of supply side is separated with plug-in strip, cuts off the current supply circuit of supply side and power load side；When plug-in strip counter motion is closed to the second moving contact and with the second moving contact and contacted, power load side can pass through static contact, the second moving contact ground wire automatically, and it realizes rapid grounding and lattice from operation, then both job safety can guarantee that, safe and reliable, easy to operate, low cost of manufacture, easily implements.
Description
Technical field
The utility model is related to the isolation earthing or grounding means of a kind of low-pressure side interruption maintenance and maintenance.
Background technology
At present, disconnecting switch and ground connection lock are not typically set in 0.4KV and below 0.4KV voltage in interruption maintenance and maintenance
Knife, brings a lot of potential safety hazards to maintenance and attendant.According to《Electric power safety working regulation-power line portion GB_
26859》6.2.2 relevant regulations, each end of power failure equipments should have obvious cut-off point, or should have and can reflect equipment running status
Electrically and mechanically wait indicate, should not work on the equipment only through breaker deenergization.Regrettably most inspection now
Repair and maintained equipment do not comply with defined above.
With current 0.4KV and below 0.4KV voltage in the dependency structure of interruption maintenance and maintenance, during mounting ground wire
Managerial defect and hidden danger for security can be caused, mainly have following three aspects：
1st, it is easy to touch other charging equipments by mistake and cause security incident in hanging earthing conductor；
2nd, the wire for using is the wire of tape insulation layer, need to cut open insulating barrier, will so affect during mounting ground wire
Wire insulation level and mechanical strength, and mount the workload of ground wire greatly, if cable run then cannot be hung at all
Ground wire, leaves hidden danger in terms of safety management；
3rd, low-voltage air switch or breaker are used as transformer low voltage or branch line master switch, when which is in disconnection
Also Wu obvious cut-off point during state, with《Electric power safety working regulation-power line portion GB_26859》6.2.2 correlation is advised
Fixed, each end of power failure equipments should have obvious cut-off point, or should have and can reflect electrically and mechanically etc. referring to for equipment running status
Show, should not work on the equipment only through breaker deenergization has conflict.
Content of the invention:
The purpose of this utility model is to provide the isolation earthing or grounding means of a kind of low-pressure side interruption maintenance and maintenance, its safety
Reliable, easy to operate, low cost of manufacture, easily implement.
Above-mentioned purpose is achieved by the following technical solution：
A kind of low-pressure side interruption maintenance and the isolation earthing or grounding means of maintenance, including be connected to power load side and supply side it
Between double-throw knife switch, the double-throw knife switch includes plug-in strip, static contact, the first moving contact and the second moving contact, and which is special
Levy and be：One end of plug-in strip is hinged on static contact, and the first moving contact connects supply side, and second moving contact is used for connecting ground
Line, the plug-in strip one end are rotated around static contact, wherein when plug-in strip moves to the first moving contact and close with the first moving contact contact when,
Supply side is powered to power load side by the first moving contact, plug-in strip and static contact；First is left when plug-in strip counter motion dynamic to touch
During head, the first moving contact of supply side is separated with plug-in strip, cuts off the current supply circuit of supply side and power load side, is played isolation and is made
With；When plug-in strip counter motion is closed to the second moving contact and with the second moving contact and contacted, power load side can pass through quiet automatically
Contact, the second moving contact ground wire, play ground connection effect.
Above-mentioned plug-in strip, static contact, the first moving contact, the second moving contact are that have multigroup, pass through per the second moving contact of group
One ground connection conducting strip couples together ground wire.
Multigroup plug-in strip described above, static contact, the first moving contact, the second moving contact are on one piece of insulating base, every
The other end of the plug-in strip of group is connected with insulation handle.
Multigroup plug-in strip described above, static contact, the first moving contact, the second moving contact refer at least 2 groups.
One detection switch is installed on described insulating base described above, the detection switch is dynamic tactile installed in first
Head side, when plug-in strip and the first moving contact close and contact, detection switch is exported a kind of signal under slippage state hand pressure, works as plug-in strip
Before pulling open with the first moving contact, detection switch resets and exports another kind of signal.
The signal output part of described detection switch described above connects an electric interlocking installation, and described is electric
The output end of locking device controls a mechanically controlled switch, mechanically controlled switch be connected to supply side and the first moving contact it
Between, when plug-in strip and the first moving contact close and contact, detection switch is depressed a kind of signal of output to electric interlocking installation, electrically
Interlock makes mechanically controlled switch closure make supply side and the first moving contact in status of electrically connecting；When plug-in strip is moved from first
Before contact is pulled open, detection switch resets another kind of signal of output first to electric interlocking installation, and electric interlocking installation makes mechanical control
System is switched off, and cut-out supply side is connected with the first moving contact, it is to avoid plug-in strip is powered to be pulled open from the first moving contact.
Above-mentioned detection switch can be inductive switch or travel switch..
Electric interlocking installation described above and mechanically controlled switch can be come by automatic reclosing open-phase protection air switch
Realize.
Described automatic reclosing open-phase protection air switch described above include zero line end of incoming cables, zero line leading-out terminal,
Three-phase end of incoming cables, three-phase leading-out terminal, breaker and circuit control part, breaker access three-phase end of incoming cables and three-phase leading-out terminal it
Between three-phase line on and control connection or the disconnection of three-phase end of incoming cables and three-phase leading-out terminal, wherein mechanically controlled switch is suitable
In breaker, electric interlocking installation is equivalent to circuit control part.
Breaker described above is provided with mechanical actuating mechanism and electromagnet, and the electromagnet orders about machinery in energising and holds
Row mechanism action and make circuit breaker trip.
The utility model is had the advantage that compared with prior art
1st, isolation earthing or grounding means of the present utility model, including the double-throw plug-in strip being connected between power load side and supply side
Switch, the double-throw knife switch includes plug-in strip, static contact, the first moving contact and the second moving contact, when plug-in strip moves to first
When moving contact being closed with the first moving contact is contacted, supply side is by the first moving contact, plug-in strip and static contact to power load side
Power supply；When the first moving contact is left in plug-in strip counter motion, the first moving contact of supply side is separated with plug-in strip, cut-out supply side with
The current supply circuit of power load side, plays buffer action；When plug-in strip counter motion to the second moving contact and with the second moving contact close
During upper contact, power load side can pass through static contact, the second moving contact ground wire automatically, play ground connection effect.In maintenance and dimension
Rapid grounding and lattice can be realized during shield from operation, then both can guarantee that job safety, safe and reliable, easy to operate, low cost of manufacture,
Easily implement.
2nd, above-mentioned plug-in strip, static contact, the first moving contact, the second moving contact be have multigroup, per group the second moving contact lead to
Cross a ground connection conducting strip unification and ground connection is coupled together, and multiple first moving contacts can connect out of phase input AC respectively
Low-tension supply, can meet multiple customer demands, easy to operate, low cost.
3rd, in terms of power supply reliability, it is directly grounded using plug-in strip, simple and quick, greatly shorten hanging earthing conductor
Workload and the working time, shorten power-off time, improve power supply reliability；The utility model is by operating plug-in strip ground connection, side
Just simple, eliminate bag, wire insulation link is cut, operating efficiency is improved, mitigate the work load of maintainer；Due to need not
Stripping being cut to wire insulation and wrapping being processed, insulation when mounting ground wire to wire has no any damage, comparatively improves
The operation level of circuit, reduces the damage to distribution line dielectric level；
4th, the signal output part of described detection switch connects an electric interlocking installation, and described electric interlocking installation connects
It is connected between supply side and the first moving contact, when plug-in strip and the first moving contact close and contact, detection switch is depressed output one
Signal is planted to electric interlocking installation, electric interlocking installation makes mechanically controlled switch closure supply side and the first moving contact be made in electricity
Connection status；Before plug-in strip is pulled open from the first moving contact, detection switch resets another kind of signal of output first to electric interlock dress
Put, electric interlocking installation disconnects mechanically controlled switch, cut-out supply side is connected with the first moving contact, it is to avoid plug-in strip is powered from the
One moving contact is pulled open.In maintenance and upkeep operation secure context, the utility model can be disconnected with reliable ground and substantially
Characteristic, and possess anti-on-load and operate a switch the blocking function of knife, effectively prevents on-load from operating a switch the maloperation behavior of knife, effectively protects
Barrier interruption maintenance and the person and the equipment safety in upkeep operation region；
6th, the utility model principle is simple, easy for installation, low cost, can quickly be grounded operation, and possess anti-
Powered mounting ground wire, on-load draw the maloperation behavior of (conjunction) plug-in strip, with job safety is ensured, shorten power-off time, section
Human-saving material resources, the advantages of lifting lead wire dielectric level, suitably promote as low-voltage distribution network switching device and use.
Description of the drawings
Fig. 1 shows theory diagram of the present utility model；
Fig. 2 shows that double-throw knife switch of the present utility model is in and connects electric running status schematic diagram；
Fig. 3 shows double-throw knife switch of the present utility model in power failure ground state schematic diagram；
Fig. 4 shows connection schematic diagram of the present utility model.
Drawing reference numeral：
10 power load sides；
20 supply sides；
30 double-throw knife switchs, 301 plug-in strips, 302 static contacts, 303 first moving contacts, 304 second moving contacts, 305 ground connection
Conducting strip, 306 insulating bases；
Insulation handle 50
40 ground wires；
60 electric interlocking installations, 61 detection switch, 62 mechanically controlled switches；.
Specific embodiment：
As shown in Figures 1 to 4, the isolation earthing or grounding means of a kind of low-pressure side interruption maintenance and maintenance, including being connected to electricity consumption
Double-throw knife switch 30 between load side 10 and supply side 20, the double-throw knife switch 30 include plug-in strip 301, static contact 302,
First moving contact 303 and the second moving contact 304, it is characterised in that：One end of plug-in strip 301 is hinged on static contact 302, and first
Moving contact 303 connects supply side 20, and second moving contact 304 is used for connecting ground wire, and 301 one end of plug-in strip is around 302 turns of static contact
Dynamic, wherein when plug-in strip 301 moves to the first moving contact 303 and close with the first moving contact 303 contact when, supply side 20 passes through the
One moving contact 303, plug-in strip 301 and static contact 302 are powered to power load side 10；First is left when 301 counter motion of plug-in strip to move
During contact 303, the first moving contact 303 of supply side 20 is separated with plug-in strip 301, cuts off the confession of supply side 20 and power load side 10
Electrical circuit, plays buffer action；When 301 counter motion of plug-in strip is closed to the second moving contact 304 and with the second moving contact 304 and contacted
When, power load side 10 can pass through static contact 302,304 ground wire 40 of the second moving contact automatically, play ground connection effect.
Above-mentioned plug-in strip 301, static contact 302, the first moving contact 303, the second moving contact 304 are that have multigroup, per group the
Two moving contacts 304 couple together ground wire 40 by a ground connection conducting strip 305.
Multigroup plug-in strip 301 described above, static contact 302, the first moving contact 303, the second moving contact 304 are exhausted installed in one piece
On edge base plate 306, the other end of the plug-in strip 301 per group is connected with insulation handle 50.
Described multigroup plug-in strip 301, static contact 302, the first moving contact 303, the second moving contact 305 refer at least 2 groups.
One detection switch 61 is installed on insulating base 306 described above, the detection switch 61 is dynamic installed in first
303 side of contact, when plug-in strip 301 and the first moving contact 303 close and contact, detection switch 61 is depressed output by insulation handle 50
A kind of signal, when plug-in strip 301 is pulled open with the first moving contact 303, detection switch 61 resets and exports another kind of signal.
The signal output part of described detection switch 61 connects an electric interlocking installation 60, described electric interlocking installation
60 output end controls a mechanically controlled switch 62, and mechanically controlled switch 62 is connected to supply side 20 and the first moving contact
Between 303, when plug-in strip 301 and the first moving contact 303 close and contact, detection switch 61 is depressed a kind of signal of output to electrically
Interlock 60, electric interlocking installation 60 make Mechanical course open 62 passes closure and make supply side 20 and the first moving contact 303 in electricity
Connection status；When plug-in strip 301 is pulled open from the first moving contact 303, another kind of signal of output that resets first of detection switch 61 is arrived
Electric interlocking installation 60, electric interlocking installation 60 disconnect mechanically controlled switch 62, cut off supply side 20 and the first moving contact 303
Connection, it is to avoid plug-in strip 301 is powered to be pulled open from the first moving contact 303.
Electric interlocking installation 60 described above and mechanically controlled switch 62 can be opened by automatic reclosing open-phase protection air
Close to realize.
Described automatic reclosing open-phase protection air switch include zero line end of incoming cables, zero line leading-out terminal, three-phase end of incoming cables,
Three-phase leading-out terminal, breaker and circuit control part, breaker access the triple line between three-phase end of incoming cables and three-phase leading-out terminal
The connection of control three-phase end of incoming cables and three-phase leading-out terminal or disconnection on road, wherein mechanically controlled switch 62 is equivalent to open circuit
Device, electric interlocking installation 60 is equivalent to circuit control part.
Breaker described above is provided with mechanical actuating mechanism and electromagnet, and the electromagnet orders about machinery in energising and holds
Row mechanism action and make circuit breaker trip.
Specifically implement structure with regard to electric interlocking installation 60 and mechanically controlled switch 62 may be implemented in a variety of ways：
Such as electric interlocking installation 60 can be a single-chip microcomputer, and 61 output signal of detection switch is converted into numeral by A/D converter
To single-chip microcomputer, the output end of single-chip microcomputer can control a relay (equivalent to this reality by a drive circuit to signal input
With new mechanically controlled switch 62)；Again for example the above：Gone using ready-made automatic reclosing open-phase protection air switch
Realize the function of electric interlocking installation 60 and mechanically controlled switch 62.Give one example again：Electric interlocking installation 60 can be one
Individual logic circuit structure, it is the signal for exporting a low level and high level that whether detection switch 61 is energized, electric interlocking installation
60 using NAND gate circuit it may determine that, logic circuit structure controls an electromagnet coil drive circuit just permissible again, profit
Control system of switching on or off electricity relay (equivalent to mechanically controlled switch of the present utility model 62) with electromagnet.
In the present embodiment, the double-throw knife switch is applied to three-phase line, is particularly suited for three-phase four-wire circuit.Detailed
After describing bright preferred embodiment of the present utility model in detail, those of ordinary skill in the art can be apparent from, without departing from
Various change and change can be carried out under attached scope of the claims and spirit, and the utility model is also not only restricted to specification
The embodiment of middle examples cited embodiment.It should be noted that word " including " is not excluded for other elements or step.In addition, right
Any element label of requirement should not be construed as limiting scope of the present utility model.
Claims (10)
1. the isolation earthing or grounding means of a kind of low-pressure side interruption maintenance and maintenance, including being connected between power load side and supply side
Double-throw knife switch, the double-throw knife switch includes plug-in strip, static contact, the first moving contact and the second moving contact, its feature
It is：One end of plug-in strip is hinged on static contact, and the first moving contact connects supply side, and second moving contact is used for connecting ground wire,
The plug-in strip one end is rotated around static contact, wherein
When plug-in strip move to the first moving contact and close with the first moving contact contact when, supply side passes through the first moving contact, plug-in strip
Power to power load side with static contact；
When the first moving contact is left in plug-in strip counter motion, the first moving contact of supply side is separated with plug-in strip, cut-out supply side with
The current supply circuit of power load side, plays buffer action；When plug-in strip counter motion to the second moving contact and with the second moving contact close
During upper contact, power load side can pass through static contact, the second moving contact ground wire automatically, play ground connection effect.
2. the isolation earthing or grounding means of low-pressure side interruption maintenance according to claim 1 and maintenance, it is characterised in that：Above-mentioned
Plug-in strip, static contact, the first moving contact, the second moving contact be have multigroup, per group the second moving contact by one ground connection conducting strip
Couple together ground wire.
3. the isolation earthing or grounding means of low-pressure side interruption maintenance according to claim 2 and maintenance, it is characterised in that：Described many
Group plug-in strip, static contact, the first moving contact, the second moving contact on one piece of insulating base, the other end of the plug-in strip per group with
Insulation handle connection.
4. the isolation earthing or grounding means of low-pressure side interruption maintenance according to claim 3 and maintenance, it is characterised in that：Described
Multigroup plug-in strip, static contact, the first moving contact, the second moving contact refer at least 2 groups.
5. low-pressure side interruption maintenance according to claim 3 or 4 and the isolation earthing or grounding means of maintenance, it is characterised in that：Institute
One detection switch is installed on the insulating base that states, the detection switch is arranged on beside the first moving contact, when plug-in strip and first
Moving contact is closed when contacting, and detection switch is depressed and exports a kind of signal, before plug-in strip and the first moving contact are pulled open, detection switch
Another kind of signal of the output that resets.
6. the isolation earthing or grounding means of low-pressure side interruption maintenance according to claim 5 and maintenance, it is characterised in that：Described
The signal output part of detection switch connects an electric interlocking installation, and the output end of described electric interlocking installation controls one
Mechanically controlled switch, mechanically controlled switch are connected between supply side and the first moving contact, when plug-in strip is closed with the first moving contact
During contact, detection switch is depressed a kind of signal of output to electric interlocking installation, and electric interlocking installation closes mechanically controlled switch
Conjunction makes supply side and the first moving contact in status of electrically connecting；When plug-in strip is pulled open from the first moving contact, detection switch is multiple first
Output another kind of signal in position arrives electric interlocking installation, and electric interlocking installation disconnects mechanically controlled switch, cuts off supply side and the
One moving contact connects, it is to avoid plug-in strip is powered to be pulled open from the first moving contact.
7. the isolation earthing or grounding means of low-pressure side interruption maintenance according to claim 6 and maintenance, it is characterised in that：Detection is opened
It can be inductive switch or travel switch to close.
8. the isolation earthing or grounding means of low-pressure side interruption maintenance according to claim 6 and maintenance, it is characterised in that:Electrically join
Locking device and mechanically controlled switch can be realized by automatic reclosing open-phase protection air switch.
9. the isolation earthing or grounding means of low-pressure side interruption maintenance according to claim 8 and maintenance, it is characterised in that:Described
Automatic reclosing open-phase protection air switch includes zero line end of incoming cables, zero line leading-out terminal, three-phase end of incoming cables, three-phase leading-out terminal, breaks
Road device and circuit control part, control three on the three-phase line between breaker access three-phase end of incoming cables and three-phase leading-out terminal
The connection of phase end of incoming cables and three-phase leading-out terminal or disconnection, wherein mechanically controlled switch is equivalent to breaker, electric interlocking installation
Equivalent to circuit control part.
10. the isolation earthing or grounding means of low-pressure side interruption maintenance according to claim 9 and maintenance, it is characterised in that:Described
Breaker be provided with mechanical actuating mechanism and electromagnet, the electromagnet orders about mechanical actuating mechanism action and makes to break in energising
Road device tripping operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620790335.2U CN206003673U (en) | 2016-07-25 | 2016-07-25 | The isolation earthing or grounding means of low-pressure side interruption maintenance and maintenance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620790335.2U CN206003673U (en) | 2016-07-25 | 2016-07-25 | The isolation earthing or grounding means of low-pressure side interruption maintenance and maintenance |
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| Publication Number | Publication Date |
|---|---|
| CN206003673U true CN206003673U (en) | 2017-03-08 |
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ID=58202153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620790335.2U Active CN206003673U (en) | 2016-07-25 | 2016-07-25 | The isolation earthing or grounding means of low-pressure side interruption maintenance and maintenance |
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| CN (1) | CN206003673U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106024481A (en) * | 2016-07-25 | 2016-10-12 | 李亮棠 | Isolated grounding device for power-off overhauling and maintenance at low voltage side |
| CN107706022A (en) * | 2017-08-17 | 2018-02-16 | 武汉长海电气科技开发有限公司 | A kind of load isolating device and method |
| CN112713051A (en) * | 2020-12-22 | 2021-04-27 | 东方电子股份有限公司 | Isolating switch for high-voltage power grid |
-
2016
- 2016-07-25 CN CN201620790335.2U patent/CN206003673U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106024481A (en) * | 2016-07-25 | 2016-10-12 | 李亮棠 | Isolated grounding device for power-off overhauling and maintenance at low voltage side |
| CN107706022A (en) * | 2017-08-17 | 2018-02-16 | 武汉长海电气科技开发有限公司 | A kind of load isolating device and method |
| CN107706022B (en) * | 2017-08-17 | 2019-09-27 | 武汉长海电气科技开发有限公司 | A kind of load isolating device and method |
| CN112713051A (en) * | 2020-12-22 | 2021-04-27 | 东方电子股份有限公司 | Isolating switch for high-voltage power grid |
| CN112713051B (en) * | 2020-12-22 | 2023-09-22 | 东方电子股份有限公司 | Disconnecting switch for high-voltage power grid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170721 Address after: 528400 Zhongshan East District, Guangdong, fraternity Road No. 68, No. six Patentee after: ZHONGSHAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CORPORATION Address before: 528400 Zhongshan City, the town of Triangle Town, Guangdong City, the town of triangle power supply branch of the three Patentee before: Li Liangtang |
|
| TR01 | Transfer of patent right |