CN207424152U - Switchgear house high-tension cable single-phase earthing warning device - Google Patents
Switchgear house high-tension cable single-phase earthing warning device Download PDFInfo
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- CN207424152U CN207424152U CN201721244303.3U CN201721244303U CN207424152U CN 207424152 U CN207424152 U CN 207424152U CN 201721244303 U CN201721244303 U CN 201721244303U CN 207424152 U CN207424152 U CN 207424152U
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- switchgear house
- copper bar
- grounding copper
- electrically connected
- tension cable
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Abstract
The utility model is related to switchgear house single phase earth fault detection technical fields, it is a kind of switchgear house high-tension cable single-phase earthing warning device, it includes being mounted on the indoor step voltage detection unit of distribution and communication unit and the alarm unit mounted on switchgear house outdoors, the first grounding copper bar and the second grounding copper bar for being mutually parallel and having spacing are installed on the ground of switchgear house, and second grounding copper bar be located at distance high-voltage cabinet and the near one side of distribution transformer, first grounding copper bar and the second grounding copper bar are electrically connected with step voltage detection unit, step voltage detection unit is electrically connected respectively with communication unit and alarm unit.The utility model is easy to use, the indoor step voltage of distribution can be detected in real time, judge whether switchgear house high-tension cable singlephase earth fault occur, it alarms in time, warning operation maintenance personnel not enter the switchgear house without authorization, it effectively prevents operation maintenance personnel from being opened in faulty generation and enters switchgear house, prevent the generation of step voltage electric shock accidents.
Description
Technical field
The utility model is related to switchgear house single phase earth fault detection technical fields, are a kind of switchgear house high-tension cable single-phase earthings
Warning device.
Background technology
At present in small current neutral grounding system, single-phase earthing is a kind of common provisional failure, is mostly occurred moist, more
Rainy day gas.After generation single-phase earthing, failure phase-to-ground voltage reduces, the rise of the phase voltage of non-faulting two-phase, but line voltage according to
It is so symmetrical, because without influencing the continuous power supply to user, system can run 1~2h, this is also the maximum of small current neutral grounding system
Advantage.If but occur singlephase earth fault when power grid longtime running, because non-faulting two phase-to-ground voltages raise 1.73 times, can
The weak link that insulation can be caused is breakdown, develops into phase fault, makes fault spread, influences the normal electricity consumption of user.Also
It may make the serious saturation of voltage transformer iron core, cause the serious overload of voltage transformer and burn.Arc grounding can also simultaneously
Cause total system overvoltage, and then damage equipment, destroy system safety operation, it is necessary to immediately operation maintenance personnel be organized to make an inspection tour distribution wire
Road and switchgear house find single-phase earthing point as early as possible.
When a certain phase conductor ground connection of overhead transmission line, cable, earth point is identical with the potential of live wire, and electric current will
It is wandering to the earth from the earth point of conducting wire, then on ground centered on conducting wire pick-up point, a Potential Distributing region is formd,
More remote from pick-up point, electric current is more scattered, and ground potential is also lower.If people or livestock station are apart from 8 to 10 meters of electric wire pick-up point
Within.Electric shock accidents may occur, this electric shock is called step voltage electric shock.So-called step voltage, just refers to electrical equipment
During generation earth fault, enter people Potential distribution area around place to walk in earth current, the voltage between bipod.When striding
When voltage reaches 40V to 50V, Danger Electric shock risk will be made one, particularly step voltage can make one to fall down and then increase touching for human body
It piezoelectric voltage or even can make one to get an electric shock and die.If electricity is sent due to trouble point in the cable or overhead line of switchgear house external ground
Spark and electric shock sound, tour personnel is very easy to find trouble point, and keeps safe distance, but tour personnel is opening switchgear house
Distribution indoor situations are not observed before door, if single-phase earthing occurs for the distribution house cable, tour personnel, which opens, to be matched somebody with somebody
Electric room is behind the door, it is likely that step voltage occurs and gets an electric shock, causes danger.
The content of the invention
The utility model provides a kind of switchgear house high-tension cable single-phase earthing warning device, overcomes the above-mentioned prior art
Deficiency, can effectively solve it is existing in the prior art cannot be real-time to the carry out of high-tension cable singlephase earth fault in switchgear house
The problem of monitoring and alerting on the spot, cause security incident.
The technical solution of the utility model is realized by following measures：A kind of switchgear house high-tension cable single-phase earthing
Warning device, including switchgear house, mounted on the indoor step voltage detection unit of distribution and communication unit and mounted on switchgear house
Alarm unit outdoors is equipped with low-voltage cabinet, high-voltage board and distribution transformer in the switchgear house, consolidates on the ground of switchgear house
Dingan County, which is equipped with, to be mutually parallel and has the first grounding copper bar and the second grounding copper bar of spacing, and the second grounding copper bar is located at distance height
Cabinet and the near one side of distribution transformer are pressed, the spacing between the second grounding copper bar and high-voltage board and distribution transformer is all higher than being equal to
4 meters, the first grounding copper bar and the second grounding copper bar are electrically connected with step voltage detection unit, step voltage detection unit difference
It is electrically connected with communication unit and alarm unit.
Here is the further optimization and/or improvements to above-mentioned utility model technical solution：
Above-mentioned step voltage detection unit may include control module, rectification module, filter module and amplification module, and first connects
Ground copper bar and the second grounding copper bar are electrically connected with rectification module, and rectification module is electrically connected with filter module, and filter module is with putting
Big module electrical connection, amplification module are electrically connected with control module, and communication unit and alarm unit are electrically connected with control module.
Above-mentioned may also include is fixedly mounted on the indoor insulation shell of distribution, power supply unit and indicator light, step voltage inspection
Unit and power supply unit is surveyed to be mounted on inside insulation shell, communication unit and indicator light are mounted on insulation shell, low-voltage cabinet with
Power supply unit is electrically connected, and power supply unit and indicator light are electrically connected with control module.
Above-mentioned communication unit can be radio-frequency antenna.
Above-mentioned alarm unit can be audible-visual annunciator.
Spacing between above-mentioned first grounding copper bar and the second grounding copper bar can be 0.8 meter.
The utility model reasonable and compact in structure, it is easy to use, the indoor step voltage of distribution can be detected in real time, and judgement is
It is no switchgear house high-tension cable singlephase earth fault occur, it alarms in time, warning operation maintenance personnel not enter the distribution without authorization
Room effectively prevents operation maintenance personnel from being opened in faulty generation and enters switchgear house, prevents the generation of step voltage electric shock accidents,
Remote alarm is carried out by communication unit simultaneously, accurately informs the operation maintenance personnel position of fault, improves O＆M speed.
Description of the drawings
Attached drawing 1 is the main view half section schematic of the best embodiment of the utility model.
Attached drawing 2 is the electrical block diagram of voltage detection unit of striding in the best embodiment of the utility model.
Coding in attached drawing is respectively：1 is switchgear house, and 2 be low-voltage cabinet, and 3 be high-voltage board, and 4 be distribution transformer, and 5 be
One grounding copper bar, 6 be the second grounding copper bar, and 7 be insulation shell, and 8 be communication unit, and 9 be indicator light.
Specific embodiment
The utility model, can technical solution according to the present utility model and actual conditions from the limitation of following embodiments
Determine specific embodiment.
In the utility model, for ease of description, the description of the relative position relation of each component is according to specification
The Butut mode of attached drawing 1 is described, such as：The position relationship of forward and backward, upper and lower, left and right etc. is according to Figure of description 1
Butut direction come it is definite.
The utility model is further described with reference to embodiment and attached drawing：
As shown in attached drawing 1,2, the switchgear house high-tension cable single-phase earthing warning device, including switchgear house 1, mounted on distribution
Step voltage detection unit and communication unit 8 in room 1 and the alarm unit mounted on switchgear house 1 outdoors, in the switchgear house 1
Low-voltage cabinet 2, high-voltage board 3 and distribution transformer 4 are inside installed, are installed on the ground of switchgear house 1 between being mutually parallel and having
Away from the first grounding copper bar 5 and the second grounding copper bar 6, and the second grounding copper bar 6 is located at distance high-voltage cabinet 3 and distribution transformer 4
Near one side, the spacing between the second grounding copper bar 6 and high-voltage board 3 and distribution transformer 4 are all higher than being equal to 4 meters, the first ground connection
5 and second grounding copper bar 6 of copper bar is electrically connected with step voltage detection unit, step voltage detection unit respectively with communication unit
8 and alarm unit electrical connection.
Here the first grounding copper bar 5 and the second grounding copper bar 6 are mutually parallel and have spacing, and its spacing is at 0.8 meter, for mould
The distance between the people's bipod for entering that Potential distribution area walks around place in earth current is imitated, so as to obtain step voltage；Due to
《Power distribution network operating standard》Middle regulation people must not be close within 4 meters of trouble point in switchgear house 1, therefore the requires of the utility model the
Spacing between two grounding copper bars 6 and high-voltage board 3 and distribution transformer 4 is all higher than being equal to 4 meters；Step voltage detection unit is used for
The real-time step voltage that the first grounding copper bar 5 of detection and the second grounding copper bar 6 collect in real time, judges simultaneously step voltage
Send command adapted thereto；Communication unit 8 is existing known technology, for remote alarms；Alarm unit is existing known technology, is used for
It alarms on the spot.
During work, the first grounding copper bar 5 and the second grounding copper bar 6 gather real-time step voltage and are transmitted to step voltage inspection
Survey unit, step voltage detection unit carries out the step voltage received processing calculating, and in step voltage detection unit
Default step voltage threshold value is compared, if step voltage is more than 40V, step voltage detection unit control alarm unit hair
Go out alarm signal, remote alarm is carried out by communication unit 8,1 title of switchgear house of single-phase earthing occurs for long-range display, accurate to accuse
Know the operation maintenance personnel position of fault.Therefore the utility model can detect the step voltage in switchgear house 1 in real time, judge whether to match somebody with somebody
Electric room high-tension cable singlephase earth fault, alarms in time, and warning operation maintenance personnel not enter the switchgear house 1 without authorization, effectively
It prevents operation maintenance personnel from being opened in faulty generation and enters switchgear house 1, prevent the generation of step voltage electric shock accidents, lead to simultaneously
It crosses communication unit 8 and carries out remote alarm, accurately inform the operation maintenance personnel position of fault, improve O＆M speed.
The utility model provides alternating current 220V power supply unit to battery powered from charged pool, while by low-voltage cabinet 2
Can according to actual needs, to above-mentioned switchgear house high-tension cable single-phase earthing warning device make further optimization or/and
It improves：
As shown in attached drawing 1,2, the step voltage detection unit includes control module, rectification module, filter module and puts
Big module, the first grounding copper bar 5 and the second grounding copper bar 6 are electrically connected with rectification module, and rectification module is electrically connected with filter module
Connect, filter module is electrically connected with amplification module, and amplification module is electrically connected with control module, communication unit 8 and alarm unit with
Control module is electrically connected.Here control module, rectification module, filter module and amplification module are existing known technology；Work
When, the step voltage that the first grounding copper bar 5 and the second grounding copper bar 6 collect after over commutation, filtering and amplification, is sent into successively
Control module is converted, calculated and judged, and sends command adapted thereto according to judging result.
As shown in attached drawing 1,2, the insulation shell 7 being fixedly mounted in switchgear house 1, power supply unit and indicator light 9 are further included,
Step voltage detection unit and power supply unit are mounted on inside insulation shell 7, and communication unit 8 and indicator light 9 are mounted on insulation shell
On body 7, low-voltage cabinet 2 is electrically connected with power supply unit, and power supply unit and indicator light 9 are electrically connected with control module.Used here as exhausted
Edge housing 7 can effectively keep the cleaning of step voltage detection unit, increase the service life of step voltage detection unit；Power supply
Unit can be rechargeable battery, and low-voltage cabinet 2 provides alternating current 220V power supply unit and charges the battery；Indicator light 9 is used to indicate the present apparatus
Whether normal operating conditions is in.
As needed, the communication unit 8 is radio-frequency antenna.
As needed, the alarm unit is audible-visual annunciator.
As shown in attached drawing 1,2, the spacing between 5 and second grounding copper bar 6 of the first grounding copper bar is 0.8 meter.Here
Spacing between first grounding copper bar 5 and the second grounding copper bar 6 is 0.8 meter, makes the step voltage that the utility model collects more
Accurately.
More than technical characteristic constitutes the most preferred embodiment of the utility model, with stronger adaptability and optimal implementation
Effect can increase and decrease non-essential technical characteristic, to meet the needs of different situations according to actual needs.
Claims (9)
1. a kind of switchgear house high-tension cable single-phase earthing warning device, it is characterised in that including switchgear house, in switchgear house
Step voltage detection unit and communication unit and the alarm unit mounted on switchgear house outdoors, be equipped in the switchgear house
Low-voltage cabinet, high-voltage board and distribution transformer are installed with the first ground connection for being mutually parallel and having spacing on the ground of switchgear house
Copper bar and the second grounding copper bar, and the second grounding copper bar is located at distance high-voltage cabinet and the near one side of distribution transformer, the second ground connection
Spacing between copper bar and high-voltage board and distribution transformer is all higher than being equal to 4 meters, and the first grounding copper bar and the second grounding copper bar are equal
It is electrically connected with step voltage detection unit, step voltage detection unit is electrically connected respectively with communication unit and alarm unit.
2. switchgear house high-tension cable single-phase earthing warning device according to claim 1, it is characterised in that the electricity that strides
Detection unit is pressed to include control module, rectification module, filter module and amplification module, the first grounding copper bar and the second grounding copper bar
It is electrically connected with rectification module, rectification module is electrically connected with filter module, and filter module is electrically connected with amplification module, amplification module
It is electrically connected with control module, communication unit and alarm unit are electrically connected with control module.
3. switchgear house high-tension cable single-phase earthing warning device according to claim 2, it is characterised in that further include fixation
Mounted on the indoor insulation shell of distribution, power supply unit and indicator light, step voltage detection unit and power supply unit are mounted on absolutely
Edge enclosure interior, communication unit and indicator light be mounted on insulation shell on, low-voltage cabinet is electrically connected with power supply unit, power supply unit with
Indicator light is electrically connected with control module.
4. the switchgear house high-tension cable single-phase earthing warning device according to claim 1 or 2 or 3, it is characterised in that described
Communication unit is radio-frequency antenna.
5. the switchgear house high-tension cable single-phase earthing warning device according to claim 1 or 2 or 3, it is characterised in that described
Alarm unit is audible-visual annunciator.
6. switchgear house high-tension cable single-phase earthing warning device according to claim 4, it is characterised in that the alarm is single
Member is audible-visual annunciator.
7. the switchgear house high-tension cable single-phase earthing warning device according to claim 1 or 2 or 3 or 6, it is characterised in that institute
It is 0.8 meter to state the spacing between the first grounding copper bar and the second grounding copper bar.
8. switchgear house high-tension cable single-phase earthing warning device according to claim 4, it is characterised in that described first connects
Spacing between ground copper bar and the second grounding copper bar is 0.8 meter.
9. switchgear house high-tension cable single-phase earthing warning device according to claim 5, it is characterised in that described first connects
Spacing between ground copper bar and the second grounding copper bar is 0.8 meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721244303.3U CN207424152U (en) | 2017-09-27 | 2017-09-27 | Switchgear house high-tension cable single-phase earthing warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721244303.3U CN207424152U (en) | 2017-09-27 | 2017-09-27 | Switchgear house high-tension cable single-phase earthing warning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207424152U true CN207424152U (en) | 2018-05-29 |
Family
ID=62313072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721244303.3U Expired - Fee Related CN207424152U (en) | 2017-09-27 | 2017-09-27 | Switchgear house high-tension cable single-phase earthing warning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207424152U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740763A (en) * | 2021-08-10 | 2021-12-03 | 国网辽宁省电力有限公司营口供电公司 | Single-phase grounding monitoring alarm and area judgment device and method for 10kV system of transformer substation |
-
2017
- 2017-09-27 CN CN201721244303.3U patent/CN207424152U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740763A (en) * | 2021-08-10 | 2021-12-03 | 国网辽宁省电力有限公司营口供电公司 | Single-phase grounding monitoring alarm and area judgment device and method for 10kV system of transformer substation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180529 |