CN103199485B - A kind of flame-proof type long distance short-circuit protector - Google Patents
A kind of flame-proof type long distance short-circuit protector Download PDFInfo
- Publication number
- CN103199485B CN103199485B CN201310122864.6A CN201310122864A CN103199485B CN 103199485 B CN103199485 B CN 103199485B CN 201310122864 A CN201310122864 A CN 201310122864A CN 103199485 B CN103199485 B CN 103199485B
- Authority
- CN
- China
- Prior art keywords
- circuit
- short
- protector
- power supply
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Locating Faults (AREA)
Abstract
Flame-proof type long distance short-circuit protector belongs to colliery technical field of electric appliances, comprise power supply unit and signal processing unit, it is characterized in that power supply unit installs three transformers at three-phase 127V mains side, be that protector terminal is powered by delta connection, transformer secondary output provides DC power supply after rectification, filtering; Signal processing unit connects triode ground level by comparator output terminal, the collector connecting relay coil of triode, relay normally closed contact one termination the earth, three phase network is accessed by resistance in one end, relay normally open point connects big capacity electrolyte capacitor, and electric capacity accesses electrical network by resistance.The detection mode of protector of the present invention short-circuit signal is converted into insulation against ground resistance value signal, then passes top back, and therefore have nothing to do with the thickness of cable, maximum protecting distance can reach 2000 meters.
Description
Technical field
The invention belongs to colliery technical field of electric appliances, relate to a kind of device being underground coal mine long-distance illumination line short and carrying out protecting.
Background technology
At present, often occur that, because light conduits circuit is longer, when cable end piece is short-circuited, lightning comprehensive protector can't detect cable end piece short circuit, causes accident to occur at underground coal mine.Therefore flame-proof type long distance short-circuit protector is absolutely necessary.
And the realization of like product in the past all adopts is short-circuit signal is converted to electric leakage signal, then send into top, leak current fault or short trouble cannot be differentiated like this.
Summary of the invention
The object of this invention is to provide a kind of for underground coal mine flame-proof type long distance short-circuit protector.
The present invention is achieved like this: flame-proof type long distance short-circuit protector, comprise power supply unit and signal processing unit, it is characterized in that power supply unit installs three transformers at three-phase 127V mains side, be that protector terminal is powered by delta connection, transformer secondary output provides DC power supply after rectification, filtering; Signal processing unit connects triode ground level by comparator output terminal, the collector connecting relay coil of triode, relay normally closed contact one termination the earth, three phase network is accessed by resistance in one end, relay normally open point connects big capacity electrolyte capacitor, and electric capacity is by resistance access electricity.
Advantage of the present invention is: the detection mode of short-circuit protection short-circuit signal is converted into insulation against ground resistance value signal, then passes top back.When terminal is short-circuited fault, cable insulation against ground increases, and the illumination integrated protection that accessory connects with it collects the change of insulation against ground resistance, judges that cable end piece is short-circuited, and cuts off the electricity supply and shows short trouble.
Protector of the present invention is mainly used in the end of underground coal mine 127V illuminating line.
Accompanying drawing explanation
Fig. 1 is the circuit connection diagram of embodiment of the present invention protector.
In figure, transformer T1, T2, T3; Current rectifying and wave filtering circuit; Resistance: R1-R9; Electric capacity C1; Diode D1`-D5; Comparator U1; Triode Q1, relay J.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.
Embodiment: the present embodiment flame-proof type long distance short-circuit protector as shown in Figure 1, comprises power supply unit and signal processing unit.Power supply unit installs three transformer T1, T2, T3 at three-phase 127V mains side, is that protector terminal is powered by delta connection; Circuit Fault on Secondary Transformer exports and connects current rectifying and wave filtering circuit, out-put supply VCC, as protective circuit power supply.U1 is comparator, and U1 exports and connects transistor base.The coil of the collector connecting relay J of triode.The normally closed contact one termination the earth of relay J, the normally closed some other end is by resistance R7, and R8, R9 access electrical network; Normal battle meets electrochemical capacitor C, and resistance R4, R5, R6, diode etc.
The specific works principle of embodiment is as follows: under normal circumstances, comparator U1 output LOW voltage, and electrical network, by resistance R7-R9, connects the earth after the normally closed point of relay J.When cable is short-circuited fault, comparator U1 exports high level, drives triode Q1 conducting, relay J energized action.Normal opened contact closes, and electric capacity is discharged by relay tip, provides signal to lightning comprehensive protector top, after top detects terminal signaling, cuts off the electricity supply immediately, shows short trouble simultaneously, effectively protect illuminating line.
The detection mode of protector of the present invention short-circuit signal is converted into insulation against ground resistance value signal, then passes top back, and therefore have nothing to do with the thickness of cable, maximum protecting distance can reach 2000 meters.
Claims (1)
1. a flame-proof type long distance short-circuit protector, comprise power supply unit and signal processing unit, it is characterized in that the end of described short-circuit protector for underground coal mine 127V illuminating line, the detection mode of short-circuit protection short-circuit signal is converted into insulation against ground resistance value signal, then passes top back; Described power supply unit installs three transformer T1, T2, T3 at three-phase 127V mains side, is that protector terminal is powered by delta connection; Circuit Fault on Secondary Transformer exports and connects current rectifying and wave filtering circuit, out-put supply VCC, as protective circuit power supply; Described signal processing unit is exported by comparator U1 and connects transistor base, the coil of the collector connecting relay J of triode, the normally closed contact one termination the earth of relay J, the normally closed some other end is by resistance R7, and R8, R9 access electrical network, normal battle meets electrochemical capacitor C1, electrochemical capacitor C1 is by resistance R4, and diode and R5, diode and R6 access electrical network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310122864.6A CN103199485B (en) | 2013-04-10 | 2013-04-10 | A kind of flame-proof type long distance short-circuit protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310122864.6A CN103199485B (en) | 2013-04-10 | 2013-04-10 | A kind of flame-proof type long distance short-circuit protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103199485A CN103199485A (en) | 2013-07-10 |
| CN103199485B true CN103199485B (en) | 2016-03-02 |
Family
ID=48721889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310122864.6A Active CN103199485B (en) | 2013-04-10 | 2013-04-10 | A kind of flame-proof type long distance short-circuit protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103199485B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051274A (en) * | 1990-11-27 | 1991-05-08 | 煤炭科学研究总院南京研究所 | Combined protection system for remote illumination signs in coal mine |
| CN2272161Y (en) * | 1996-10-29 | 1998-01-07 | 杨运富 | Remote interphase short-circuit protection |
| CN203205825U (en) * | 2013-04-10 | 2013-09-18 | 南京双京电器集团有限公司 | Flameproof long-distance short circuit protector |
-
2013
- 2013-04-10 CN CN201310122864.6A patent/CN103199485B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051274A (en) * | 1990-11-27 | 1991-05-08 | 煤炭科学研究总院南京研究所 | Combined protection system for remote illumination signs in coal mine |
| CN2272161Y (en) * | 1996-10-29 | 1998-01-07 | 杨运富 | Remote interphase short-circuit protection |
| CN203205825U (en) * | 2013-04-10 | 2013-09-18 | 南京双京电器集团有限公司 | Flameproof long-distance short circuit protector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103199485A (en) | 2013-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204649834U (en) | A kind of integral and intelligent electric energy meter with leakage current monitoring and protecting function | |
| CN201590645U (en) | AC input over-voltage and under-voltage protection device for electric apparatus | |
| CN203205825U (en) | Flameproof long-distance short circuit protector | |
| CN103199485B (en) | A kind of flame-proof type long distance short-circuit protector | |
| CN204597453U (en) | Electric prospection switch | |
| CN104459545A (en) | Control circuit and battery short circuit testing device including control circuit | |
| CN208283451U (en) | A kind of communication power supply voltage detecting circuit | |
| CN203551744U (en) | Electric energy meter load switch state detection circuit | |
| CN103245836B (en) | There is the intelligent megohmmeter of automatic discharging function | |
| CN203166469U (en) | Phase sequence protective relay | |
| CN203606421U (en) | Improved current transformer | |
| CN205945011U (en) | Colliery is flame -proof type long distance short -circuiting device in pit | |
| CN201282328Y (en) | Motor protector with single-phase grounding protection | |
| CN201204436Y (en) | Electrical leakage detection protection device for solar photovoltaic parallel inverter | |
| CN204631177U (en) | A kind of single phase low voltage distribution system Fault Pre pick-up unit | |
| CN203773004U (en) | Direct current grounding fault isolation signal collector | |
| CN201838986U (en) | Leakage protector | |
| CN204089151U (en) | A kind of family with leakage current protection device table case | |
| CN204794055U (en) | Zero disconnected open phase protection of low pressure power supply system | |
| CN204271634U (en) | A kind of large through-flow module lightning protection device structure | |
| CN202455142U (en) | Portable power source box | |
| CN204154799U (en) | Based on the DC wave recording device of relay-set | |
| CN204044305U (en) | A kind of testing circuit for 35kV effluve | |
| CN208986412U (en) | A kind of novel distribution cabinet with electric leakage prompt | |
| CN203574349U (en) | Vehicle power supply security control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Explosion-proof type long distance short circuit protector Effective date of registration: 20200311 Granted publication date: 20160302 Pledgee: Nanjing Liuhe Branch of Jiangsu Bank Co., Ltd. Pledgor: NANJING SHUANGJING ELECTRICAL Co.,Ltd. Registration number: Y2020980000591 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20210115 Granted publication date: 20160302 Pledgee: Nanjing Liuhe Branch of Jiangsu Bank Co.,Ltd. Pledgor: NANJING SHUANGJING ELECTRICAL Co.,Ltd. Registration number: Y2020980000591 |