CN204595140U - A kind of interior distribution device ground connection audible-visual annunciator - Google Patents
A kind of interior distribution device ground connection audible-visual annunciator Download PDFInfo
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- CN204595140U CN204595140U CN201520238415.2U CN201520238415U CN204595140U CN 204595140 U CN204595140 U CN 204595140U CN 201520238415 U CN201520238415 U CN 201520238415U CN 204595140 U CN204595140 U CN 204595140U
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- 238000004804 winding Methods 0.000 claims abstract description 9
- 230000007935 neutral effect Effects 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 description 6
- 238000007689 inspection Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model provides a kind of interior distribution device ground connection audible-visual annunciator, comprise voltage transformer (VT), it is characterized in that: described voltage transformer (VT) is connected with high voltage bus by handcart, voltage transformer (VT) has two Secondary Winding, one is star-star connection winding, another is zero sequence coil, and described zero sequence coil two ends are connected to voltage relay, the contact switch series connection alarm of described voltage relay.This technical scheme can neutral point not solidly grounded system generation singlephase earth fault time, the very first time just automatically can warn that field staff is prohibited from entering or withdraws may the power distribution equipment of ground connection, prevents accident of human electric shock.
Description
Technical field
The utility model relates to for electrical domain, specifically, relates to a kind of interior distribution device ground connection sound and light alarm.
Background technology
Neutral point not solidly grounded system generation singlephase earth fault time, earth fault may on each outlet circuit on this power distribution equipment (this section of bus), also may on the high pressure indoor equipment of this section of bus.Monitoring person on duty is by examination, analysis and judge, notice O&M person on duty, general needs 5 minutes, if combined failure, the required judgement time is longer; Then notify on-the-spot maintenance by O&M person on duty, O&M is maked an inspection tour, specialty makes an inspection tour the personnel such as team, construction maintenance, like this from be grounding to the maximum duration notifying field staff and can reach tens minutes, this situation may threaten the personal safety of field staff, and the power distribution equipment at scene does not have in the very first time to the device of field staff's alarm, warn the power distribution equipment that they were prohibited from entering or withdrew ground connection, this is a potential safety hazard.
Summary of the invention:
The technical problems to be solved in the utility model is to provide a kind of interior distribution device ground connection audible-visual annunciator, the very first time sends early warning information, prevent accident of human electric shock, and image monitoring system can be started in real time, enable person on duty grasp field apparatus, personnel's situation all sidedly.
The utility model adopts following technical scheme to realize goal of the invention:
A kind of interior distribution device ground connection audible-visual annunciator, comprise voltage transformer (VT), it is characterized in that: described voltage transformer (VT) is connected with high voltage bus by handcart, voltage transformer (VT) has two Secondary Winding, one is star-star connection winding, another is zero sequence coil, and described zero sequence coil two ends are also connected to voltage relay, the contact switch series connection alarm of described voltage relay.
As the further restriction to the technical program, described report zero sequence coil connection control device, described controller connects camera and wireless transmitter module.
As the further restriction to the technical program, described controller adopts AT89S52 single-chip microcomputer, and described wireless transmitter module adopts transmitting chip PT2262.
As the further restriction to the technical program, the trigger voltage of described voltage relay is 30V.
As the further restriction to the technical program, described alarm is operating voltage direct current is 24V.
As the further restriction to the technical program, described alarm is arranged on the voltage transformer cabinet door of described bus.
As the further restriction to the technical program, the contact switch of described voltage relay is normally opened contact.
As the further restriction to the technical program, described alarm is audible-visual annunciator.
As the further restriction of the technical program, described camera is arranged on the top of described voltage transformer cabinet.
Compared with prior art, advantage of the present utility model and good effect are: this technical scheme can neutral point not solidly grounded system generation singlephase earth fault time, the very first time just automatically can warn the power distribution equipment that field staff was prohibited from entering or withdrew possibility ground connection, prevents accident of human electric shock; Wiring is simple, reliable in action, Instant alarming.The starting of device is started by the moving together contact of voltage relay, can connect alarm, so wiring is simple, and reliable in action.Can snap action report to the police, warning field staff is prohibited from entering or withdraws immediately possibility ground connection place, prevents accident of human electric shock.After ground connection disappears, alarm can return immediately; Cheap, easy for installation, without the need to high-tension apparatus is had a power failure during installation; This alarm is arranged on every section of bus PT cabinet door, can inform the bus that field staff breaks down intuitively, clearly.Camera is as the utility appliance of power distribution equipment earth fault in monitoring room, intuitively water inlet or the door and window toy that is not closed completely can not closed due to switchgear building roof leaking, door and window in scene whether to enter and cause earth fault, and whether grounding lead works situations such as catching fire, be transferred to Surveillance center, make person on duty make correct judgement and process.
Accompanying drawing explanation
Fig. 1 is interior distribution device ground connection sound and light alarm circuit schematic diagram of the present utility model.
Fig. 2 is interior distribution device ground connection image monitoring functional-block diagram of the present utility model.
In Fig. 1,1, zero sequence coil, 2, switching on/off handcart, 3, star-star connection winding, 4, alarm, KV, voltage relay.
Embodiment:
Below in conjunction with embodiment, further illustrate the utility model.
See Fig. 1 and Fig. 2, the utility model comprises voltage transformer (VT), described voltage transformer (VT) is connected with high voltage bus (not shown) by voltage transformer (VT) switching on/off handcart, voltage transformer (VT) has two Secondary Winding, one is star-star connection winding 3, another is zero sequence coil 1, and described zero sequence coil 1 two ends are also connected to voltage relay KV, the contact switch series connection alarm 4 of described voltage relay.
Described zero sequence coil 1 connection control device, described controller connects camera and wireless transmitter module, when voltage transformer (VT) senses zero sequence coil 1 voltage signal, controller sends remote alarm signal by wireless transmitter module, and the image scene that camera is taken is sent to the Surveillance center in a distant place, so that Surveillance center person on duty understands the on-the-spot situation such as personnel, equipment further, simultaneously also as the standby of audible-visual annunciator, thus operator on duty is made to make correct judgement and process.
Described controller adopts AT89S52 single-chip microcomputer, and described wireless transmitter module adopts transmitting chip PT2262.
The operating voltage of described alarm 4 is 24V.
Described alarm 4 is arranged on the voltage transformer cabinet door of described bus.
The contact switch of described voltage relay is normally opened contact.
Described alarm 4 is audible-visual annunciator.The recording substance of phonetic warning is that " equipment generation earth fault, please don't be close; Field staff's both feet close up beyond evacuation appliance 4 meters.”
The technical program is applicable in electric system or user's high voltage electric equipment, neutral point is solidly grounded system interior distribution device not, when above-mentioned power distribution equipment generation singlephase earth fault, instantaneously can send alarm voice and flicker alarm lamp, inform the on-the-spot personnel such as maintenance, tour, operation, in time, correctly leave the place of likely ground connection, ensure the safety of the person, prevent the personal injury contacting electric shock and step voltage electric shock.
" State Grid Corporation of China's electric power safety working regulation " (power transformation part) 5.2.4 bar specifies: when ground connection occurs high-tension apparatus, indoor occupant is answered beyond distance fault point 4 meters, and outside work personnel answer beyond distance fault point 8 meters.Enter above-mentioned scope and should wear insulating boot, when contact arrangement shell and framework, should insulating glove be worn.
When neutral point non-direct grounding system generation singlephase earth fault, earth fault may each outlet circuit on this power distribution equipment (this section of bus) also may be the support porcelain vase of this section of bus, switching on/off handcart and bus-bar potential transformer, main transformer is passed a bridge, the insulation damages fault of the first-class high pressure indoor equipment of each outlet cable.That is earth fault is both likely on distribution line, also likely in switchgear building (hyperbaric chamber).After State Grid Corporation of China's implementation three collection five is large, by regulation and control personnel, operation monitoring is carried out to electrical network; When system generation singlephase earth fault, monitoring person on duty is by the examination to tens monitor messages such as " device is abnormal ", " voltage out-of-limit ", " busbar grounding ", analysis and judgement, conclude system earth or voltage transformer fuse fusing or system resonance, then scheduling and notice O&M person on duty is reported, general needs 5 minutes, if system earth adds resonance or system earth causes the combined failures such as fuse melting, the required judgement time is longer; Then notify on-the-spot maintenance by O&M person on duty, O&M is maked an inspection tour, specialty makes an inspection tour team personnel, like this from be grounding to the maximum duration notifying field staff and can reach tens minutes, on-the-spotly directly can to remind without any device, to warn field staff and withdraws or forbids entering scene; Even if through regulation and control personnel, O&M operator on duty by La Lu or other technologies means, the localization of faults on the line, the healthy phases of distribution indoor equipment then bears line voltage, the longlyest reach nearly 2 hours, field staff not easily near this equipment, so, must earth fault occur the very first time, inform field staff, and reality to notify field staff immediately; This situation may threaten the personal safety of field staff, and this is a potential safety hazard.
Claims (8)
1. an interior distribution device ground connection audible-visual annunciator, comprise voltage transformer (VT), it is characterized in that: described voltage transformer (VT) is connected with high voltage bus by switching on/off handcart, voltage transformer (VT) has two Secondary Winding, one is star-star connection winding, another is zero sequence coil, and described zero sequence coil two ends are also connected to voltage relay, the contact switch series connection alarm of described voltage relay.
2. interior distribution device ground connection audible-visual annunciator according to claim 1, is characterized in that: described zero sequence coil connection control device, and described controller connects camera and wireless transmitter module.
3. interior distribution device ground connection audible-visual annunciator according to claim 2, is characterized in that: described controller adopts AT89S52 single-chip microcomputer, and described wireless transmitter module adopts transmitting chip PT2262.
4. interior distribution device ground connection audible-visual annunciator according to claim 2, is characterized in that: the trigger voltage of described voltage relay is 30V.
5. interior distribution device ground connection audible-visual annunciator according to claim 1, is characterized in that: described alarm is operating voltage is direct current 24V.
6. interior distribution device ground connection audible-visual annunciator according to claim 1, is characterized in that: described alarm is arranged on the voltage transformer cabinet door of described bus.
7. interior distribution device ground connection audible-visual annunciator according to claim 1, is characterized in that: the contact switch of described voltage relay is normally opened contact.
8. interior distribution device ground connection audible-visual annunciator according to claim 1, is characterized in that: described alarm is audible-visual annunciator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520238415.2U CN204595140U (en) | 2015-04-20 | 2015-04-20 | A kind of interior distribution device ground connection audible-visual annunciator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520238415.2U CN204595140U (en) | 2015-04-20 | 2015-04-20 | A kind of interior distribution device ground connection audible-visual annunciator |
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| CN204595140U true CN204595140U (en) | 2015-08-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105955250A (en) * | 2016-05-11 | 2016-09-21 | 国网山东省电力公司高唐县供电公司 | Remote-control step voltage alarm trolley and alarm method thereof |
| CN110865229A (en) * | 2019-12-03 | 2020-03-06 | 国网河南省电力公司电力科学研究院 | Step voltage indicating system for short circuit grounding test |
-
2015
- 2015-04-20 CN CN201520238415.2U patent/CN204595140U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105955250A (en) * | 2016-05-11 | 2016-09-21 | 国网山东省电力公司高唐县供电公司 | Remote-control step voltage alarm trolley and alarm method thereof |
| CN105955250B (en) * | 2016-05-11 | 2019-01-15 | 国网山东省电力公司高唐县供电公司 | Drone version step voltage alarm trolley and its alarm method |
| CN110865229A (en) * | 2019-12-03 | 2020-03-06 | 国网河南省电力公司电力科学研究院 | Step voltage indicating system for short circuit grounding test |
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