CN102426318A - Phase-wire grounding warner - Google Patents
Phase-wire grounding warner Download PDFInfo
- Publication number
- CN102426318A CN102426318A CN2011102731243A CN201110273124A CN102426318A CN 102426318 A CN102426318 A CN 102426318A CN 2011102731243 A CN2011102731243 A CN 2011102731243A CN 201110273124 A CN201110273124 A CN 201110273124A CN 102426318 A CN102426318 A CN 102426318A
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- relay
- voltage transformer
- warner
- secondary winding
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Abstract
The invention relates to a warning device for grounding phase wires of a trolley switch and a high-voltage switch cabinet, in particular to a phase-wire grounding warner which is characterized by comprising a potential transformer (PT), wherein a primary winding of the PT is connected in series between a null wire and the ground; a coil of another relay (YJ) is connected in series between two ends of a secondary winding of the PT; one end of the secondary winding of the PT is grounded; and a pair of normally open contacts of the relay (YJ) is connected in series with a voice warner (IC1) and then connected in parallel at two ends of a direct-current power supply. The device provided by the invention has the advantages of simple structure, stability and reliability in operation, and convenience for installation, and can further achieve an effect of self examination and be also discovered easily if damaged.
Description
Technical field
The present invention relates to a kind of warning device, especially phase line ground alarm when being used for car switch and high-tension switch cabinet phase line ground connection.
Background technology
Along with making rapid progress of power technology development, car switch and high-tension switch cabinet are widely used in electricity supplying and using system.There are remarkable advantages with its compact conformation, floor area machinery and electrical endurance little, that allow in car switch and switch cubicle than oil switch.Therefore, obtained using widely in 10kV and the 35kV system at home in recent years.
But according to existing operating experience, homemade car switch and switch cubicle, design level, still shortcoming relatively all on the manufacturing process, especially aspect the reliability of operating mechanism, further raising is badly in need of in aspects such as insulation.There is certain hidden danger in the operation of this kind equipment.Find that on inspection mostly the reason that breaks down is the low or loose contact of contact insulating property of car switch, during system generation single-phase earthing, cause insulation damages, produce the arcing phenomenon over the ground, finally lead to a disaster.Solving above root problem device fabrication producer also needs certain hour, but is the task of top priority but will solve the threat to personal safety that equipment deficiency causes.The following network system of 35KV is an isolated neutral system, and operating standard regulation permission system continues operation 2 hours after the generation ground connection.Stipulated " after the high-tension apparatus generation ground connection, indoor inaccurate, outdoor inaccurate " simultaneously near in the 8m of trouble spot near in the 4m of trouble spot.Though each transformer station has all installed Small Electric Current Earthing And Routing Device now; But because the defective of route selection principle, the small current earthing wire-selecting system can't judge concrete which bar circuit accurately, and ground connection is taken place, and the small current neutral grounding device is installed in protection chamber or the pulpit; After ground connection takes place in system; Can not play forewarning function to the staff in the hyperbaric chamber, in case ground connection causes the blast of high-voltage chamber switch cabinet, to the greatly threat of personal safety generation of indoor occupant.
Summary of the invention
The purpose of this invention is to provide a kind of device that can when phase line takes place by ground connection, in time carry out audio alert.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following.
A kind of phase line ground alarm; Its special feature is; Comprise voltage transformer (VT), a windings in series of this voltage transformer (VT) is between zero line and ground, and other has a relay coil to be connected on the Secondary Winding two ends of this voltage transformer (VT); And the Secondary Winding one end ground connection of this voltage transformer (VT); Be connected in parallel on a direct current both ends of power after a pair of normally opened contact of aforementioned relay and the phonetic alarm series connection, a pair of normally opened contact two ends of relay also are parallel with a normally open push button switch in addition, at the other light emitting diode that also is in series with of phonetic alarm.
Apparatus of the present invention are simple in structure, and working stability is reliable, and are easy for installation, can also realize self check, also come to light easily as damaging.
Description of drawings
Accompanying drawing 1 is circuit theory diagrams of the present invention;
Accompanying drawing 2 is circuit theory diagrams of the present invention.
Embodiment
Come the present invention is done further detailed explanation below in conjunction with accompanying drawing.
Like Fig. 1, shown in 2; Apparatus of the present invention comprise voltage transformer pt; A windings in series of this voltage transformer pt is between zero line and ground; Other has a relay YJ coil to be connected on the Secondary Winding two ends of this voltage transformer pt, and the Secondary Winding one end ground connection of this voltage transformer pt, is connected in parallel on a direct current both ends of power after a pair of normally opened contact of aforementioned relay YJ and the phonetic alarm IC1 series connection; The a pair of normally opened contact two ends of relay YJ also are parallel with a pushbutton switch HN in addition, thereby also are in series with a light emitting diode through the luminous alarm signal that provides on the phonetic alarm side.
Principle of work of the present invention is following, and when isolated neutral system took place by ground connection, the ground connection phase voltage can reduce; Other phase voltages can raise, so zero line voltage also can raise, when the Secondary Winding voltage of voltage transformer pt also increases and surpasses relay YJ coil setting valve; The a pair of normally opened contact of relay YJ is closed; Phonetic alarm IC1 reports to the police, can record in advance in the phonetic alarm IC1 Chinese speech as " system earth please be withdrawn! " etc., light emitting diode is also lighted simultaneously.Press the button switch HN in addition and can detect whether operate as normal of phonetic alarm IC1.Direct supply can adopt the 5V voltage stabilizer, directly connects electric main during work and can be the device power supply.
Claims (1)
1. phase line ground alarm; It is characterized in that: comprise voltage transformer (VT) (PT); A windings in series of this voltage transformer (VT) (PT) is between zero line and ground; Other has a relay (YJ) coil to be connected on the Secondary Winding two ends of this voltage transformer (VT) (PT), and the Secondary Winding one end ground connection of this voltage transformer (VT) (PT), is connected in parallel on a direct current both ends of power after a pair of normally opened contact of aforementioned relay (YJ) and a phonetic alarm (IC1) series connection; The a pair of normally opened contact two ends of relay (YJ) also are parallel with a normally open push button switch (HN) in addition, at the other light emitting diode that also is in series with of phonetic alarm (IC1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102731243A CN102426318A (en) | 2011-09-16 | 2011-09-16 | Phase-wire grounding warner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102731243A CN102426318A (en) | 2011-09-16 | 2011-09-16 | Phase-wire grounding warner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102426318A true CN102426318A (en) | 2012-04-25 |
Family
ID=45960324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102731243A Pending CN102426318A (en) | 2011-09-16 | 2011-09-16 | Phase-wire grounding warner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102426318A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112415351A (en) * | 2020-11-04 | 2021-02-26 | 四川光慧新能源科技有限公司 | Insulation monitoring method for completing connection of charging pile on line |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2031971U (en) * | 1988-01-22 | 1989-02-01 | 吴长勤 | Safety automatic controller for electricity-consuming appliances |
| CN1064948A (en) * | 1992-04-18 | 1992-09-30 | 南京建筑工程学院 | Multifunction insulating monitor |
| CN2452191Y (en) * | 2000-10-16 | 2001-10-03 | 王寅虎 | Electric power circuit one-phase grounding trouble automatic alarming device |
| CN2453589Y (en) * | 2000-11-20 | 2001-10-10 | 高惠祥 | Device for warning the earthing of low voltage line |
| CN202075368U (en) * | 2011-05-31 | 2011-12-14 | 宁夏电力公司石嘴山供电局 | Voice alarm device for phase wire grounding |
-
2011
- 2011-09-16 CN CN2011102731243A patent/CN102426318A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2031971U (en) * | 1988-01-22 | 1989-02-01 | 吴长勤 | Safety automatic controller for electricity-consuming appliances |
| CN1064948A (en) * | 1992-04-18 | 1992-09-30 | 南京建筑工程学院 | Multifunction insulating monitor |
| CN2452191Y (en) * | 2000-10-16 | 2001-10-03 | 王寅虎 | Electric power circuit one-phase grounding trouble automatic alarming device |
| CN2453589Y (en) * | 2000-11-20 | 2001-10-10 | 高惠祥 | Device for warning the earthing of low voltage line |
| CN202075368U (en) * | 2011-05-31 | 2011-12-14 | 宁夏电力公司石嘴山供电局 | Voice alarm device for phase wire grounding |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112415351A (en) * | 2020-11-04 | 2021-02-26 | 四川光慧新能源科技有限公司 | Insulation monitoring method for completing connection of charging pile on line |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120425 |