CN103199485A - Explosion-proof type long distance short circuit protector - Google Patents
Explosion-proof type long distance short circuit protector Download PDFInfo
- Publication number
- CN103199485A CN103199485A CN2013101228646A CN201310122864A CN103199485A CN 103199485 A CN103199485 A CN 103199485A CN 2013101228646 A CN2013101228646 A CN 2013101228646A CN 201310122864 A CN201310122864 A CN 201310122864A CN 103199485 A CN103199485 A CN 103199485A
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- short circuit
- proof type
- explosion
- power supply
- long distance
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Abstract
The invention provides an explosion-proof type long distance short circuit protector, and belongs to the technical field of coal mine electrical equipment. The explosion-proof type long distance short circuit protector comprises a power supply unit and a signal processing unit. The explosion-proof type long distance short circuit protector is characterized in that the power supply unit is provided with three transformers on a three-phase 127V power supply side, a delta connection method is used for supplying power for a protector terminal, the transformer secondary coils provide a direct current power source after being rectified and filtered, the signal processing unit is connected with a triode base level through the output end of a comparator, a collector electrode of a triode is connected with a relay coil, one end of a normally closed contact of a relay is connected with ground, the other end of the normally closed contact of the relay is connected with a three-phase power grid through a resistor, a normally open contact of the relay is connected with a high-capacity electrolytic capacitor, and the capacitor is connected with the power grid through the resistor. The detection method of the explosion-proof type long distance short circuit protector is that short circuit signals are converted to ground insulation resistance value signals, and then the ground insulation resistance value signals are transmitted back to a start end, and therefore the explosion-proof type long distance short circuit protector is relevant to the thickness of cables, and the maximum protective distance can reach 2000 meters.
Description
Technical field
The invention belongs to the colliery technical field of electric appliances, relating to a kind of is the device that the long-distance illumination line short is protected under the coal mine.
Background technology
At present, often occur under coal mine because the light conduits circuit is longer, when cable end piece was short-circuited, the illumination comprehensive protector detected less than the cable end piece short circuit, caused accident to take place.Therefore flame-proof type length is absolutely necessary apart from short-circuit protector.
Be that short-circuit signal is converted to electric leakage signal and the realization of like product is in the past all adopted, send into top again, can't differentiate leak current fault or short trouble like this.
Summary of the invention
The purpose of this invention is to provide a kind of for flame-proof type length under the coal mine apart from short-circuit protector.
The present invention is achieved like this: flame-proof type length is apart from short-circuit protector, comprise power supply unit and signal processing unit, it is characterized in that power supply unit is at three-phase 127V mains side three transformers to be installed, be the power supply of protector terminal by delta connection, transformer secondary output provides DC power supply after rectification, filtering; Signal processing unit connects the triode ground level by comparator output terminal, the collector connecting relay coil of triode, relay normally closed contact one termination the earth, an end inserts three phase network by resistance, the relay normally open point connects big capacity electrochemical capacitor, and electric capacity inserts by resistance.
Advantage of the present invention is: the detection mode of short-circuit protection is that short-circuit signal is converted into insulation against ground resistance value signal, passes top then back.When terminal was short-circuited fault, the cable insulation against ground increased, and the illumination that connects of accessory is combined and protected the variation that collects the insulation against ground resistance with it, judges that cable end piece is short-circuited, and cut off the electricity supply and showed short trouble.
Protector of the present invention is mainly used in the end of 127V illuminating line under the coal mine.
Description of drawings
Fig. 1 is the circuit connection diagram of embodiment of the invention protector.
Among the figure, transformer T1, T2, T3; Current rectifying and wave filtering circuit; Resistance: R1-R9; Capacitor C 1; 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: present embodiment flame-proof type length comprises power supply unit and signal processing unit apart from short-circuit protector as shown in Figure 1.Power supply unit is at three-phase 127V mains side three transformer T1 to be installed, T2, and T3 is the power supply of protector terminal by delta connection; Circuit Fault on Secondary Transformer output connects current rectifying and wave filtering circuit, and out-put supply VCC is as the protective circuit power supply.U1 is comparator, and U1 output 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 passes through resistance R 7, R8, R9 inserts electrical network; The normal battle meets electrochemical capacitor C, and resistance R 4, R5, R6, diode etc.
The concrete operation principle of embodiment is as follows: under normal circumstances, comparator U1 output LOW voltage, electrical network connects the earth by resistance R 7-R9 behind the normally closed point of relay J.When cable was short-circuited fault, comparator U1 exported high level, drove triode Q1 conducting, and relay J gets electronic work.The normal opened contact closure, electric capacity discharges by relay tip, signal is provided for illumination comprehensive protector top, after top detects terminal signaling, cuts off the electricity supply immediately, shows short trouble simultaneously, has effectively protected illuminating line.
The detection mode of protector of the present invention is that short-circuit signal is converted into insulation against ground resistance value signal, passes top then back, and therefore irrelevant with the thickness of cable, maximum protecting distance can reach 2000 meters.
Claims (1)
1. a flame-proof type length is apart from short-circuit protector, comprise power supply unit and signal processing unit, it is characterized in that power supply unit is at three-phase 127V mains side three transformers to be installed, be the power supply of protector terminal by delta connection, transformer secondary output provides DC power supply after rectification, filtering; Signal processing unit connects the triode ground level by comparator output terminal, the collector connecting relay coil of triode, relay normally closed contact one termination the earth, an end inserts three phase network by resistance, the relay normally open point connects big capacity electrochemical capacitor, and electric capacity inserts electrical network by resistance.
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 true CN103199485A (en) | 2013-07-10 |
| CN103199485B 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 |
|---|---|
| CN103199485B (en) | 2016-03-02 |
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| 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 |
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| 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 |