CN203589700U - Electric coal drill transformer protective device - Google Patents
Electric coal drill transformer protective device Download PDFInfo
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- CN203589700U CN203589700U CN201320708769.XU CN201320708769U CN203589700U CN 203589700 U CN203589700 U CN 203589700U CN 201320708769 U CN201320708769 U CN 201320708769U CN 203589700 U CN203589700 U CN 203589700U
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- circuit
- electric leakage
- neutral point
- logic analysis
- sampling circuit
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Abstract
The utility model discloses an electric coal drill transformer protective device. The device belongs to the field of power supply equipment. The device mainly comprises a pilot starting circuit, a rapid short circuit sampling circuit, a rapid electric leakage sampling circuit, a logic analysis circuit, a neutral point switch and a state operation display. The rapid short circuit sampling circuit, the rapid electric leakage sampling circuit and the neutral point switch are jointed to three-phase high voltage electricity. The pilot starting circuit is also jointed to the three-phase high voltage electricity. The rapid short circuit sampling circuit, the rapid electric leakage sampling circuit, the neutral point switch and the pilot starting circuit are connected with the logic analysis circuit. The logic analysis circuit is further connected with the state operation display. The device saves money, shortens period, and greatly improves technological performance.
Description
Technical field
The utility model relates to a kind of protection equipment for transformer, is specifically related to electric coal drill protection equipment for transformer, belongs to power supply unit field.
Background technology
As everyone knows, electric coal drill is getting working face under coal mine " conventional weapon ".At blast mining face, with it, carry out perforating, at machine mining face, with it, be coal-winning machine digging " machine nest " etc.And that this small-sized electric equipment of electric coal drill uses is frequent, it is changeable to load, place is changeable; the most easily cause fault electricity fire; therefore; the 434th of < < safety regulations in coal mine > > be regulation clearly, and electric coal drill must be provided with leak detection, short circuit, overload, start and stop at a distance the comprehensive protector of electric coal drill.China develops and has produced polytype electric coal drill comprehensive protector in succession, the defencive function that they are all provided with leak detection, short circuit, overload, start and stop at a distance.However, because existing electrical safety technology is perfect not enough, do not possess fire prevention, the anti-explosion safety ability of abundant, complete entire system.Especially getting working face is not stopped the explosion accident of electricity for causing yet.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of electric coal drill protection equipment for transformer, and this device is not only economized on the use of funds, the shortening cycle, and has greatly improved technical performance.
Technical problem to be solved in the utility model realizes by the following technical solutions:
Electric coal drill protection equipment for transformer, this device mainly comprises guide's starting circuit, rapid cut-off sample circuit and sampling circuit of electric leakage, logic analysis circuit, neutral point switch and state operation show fast, described rapid cut-off sample circuit, quick sampling circuit of electric leakage and neutral point switch access three-phase high-voltage, described guide's starting circuit also accesses three-phase high-voltage;
Described rapid cut-off sample circuit, quick sampling circuit of electric leakage, neutral point switch and guide's starting circuit are connected with logic analysis circuit respectively, and described logic analysis circuit also shows and is connected with state operation.
Between described quick sampling circuit of electric leakage and three-phase high-voltage, be provided with capacitor.
Described logic analysis circuit is directly by Power supply.
The beneficial effects of the utility model are: this device is not only economized on the use of funds, the shortening cycle, and have greatly improved technical performance.
Accompanying drawing explanation
Fig. 1 is the utility model system configuration schematic diagram;
Fig. 2 is the utility model rapid cut-off sample circuit structure figure;
Fig. 3 is the quick sampling circuit of electric leakage structure chart of the utility model;
Fig. 4 is the utility model neutral point switch fundamental diagram.
In figure: 1-guide's starting circuit; 2-rapid cut-off sample circuit; The quick sampling circuit of electric leakage of 3-; 4-logic analysis circuit; 5-neutral point switch; The operation of 6-state shows; 7-tri-high-tension electricities; 8-capacitor; 9-power supply.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, electric coal drill protection equipment for transformer, this device mainly comprises guide's starting circuit 1, rapid cut-off sample circuit 2 and sampling circuit of electric leakage 3, logic analysis circuit 4, neutral point switch 5 and state operation show 6 fast, rapid cut-off sample circuit 2, quick sampling circuit of electric leakage 3 and neutral point switch 5 access three-phase high-voltages 7, guide's starting circuit 1 also accesses three-phase high-voltage 7; Rapid cut-off sample circuit 2, quick sampling circuit of electric leakage 3, neutral point switch 5 and guide's starting circuit 1 are connected with logic analysis circuit 4 respectively, and logic analysis circuit also shows that with state operation 6 are connected.Between sampling circuit of electric leakage 3 and three-phase high-voltage 7 electricity, be provided with capacitor 8 fast.Logic analysis circuit 4 is directly powered by power supply 9.
As shown in Figure 2, rapid cut-off sampling, Current Transformer Secondary sealing-in is high-impedance state, and make its iron core unsaturated, make it to become electric current and voltage changer, utilize circuit switching to determine rate: while changing road, the electric current of inductance element can not suddenly change, but the principle of the self induction electromotive force that electric current is responded to sudden change.While making to sample, ask and be less than 1ms.
As shown in Figure 3, fast electric leakage sampling, adopts 3c-R zero sequence sequence filter, flows through the principle fast sampling leak current fault electric current that the electricity of capacitor is filtered and can be suddenlyd change while utilizing circuit switching, is less than 2ms maximum sample time.
As shown in Figure 4, by three-phase commutation bridge SQL, oikocryst lock T
1, auxiliary brilliant lock T
2, turn-off capacitor C, current-limiting resistance R
0and be forced shutdown power pack.The end of the input access main transformer secondary three-phase coil of SQL, output termination main transistor T
1, T
2it is closed that main transformer secondary side neutral point is opened in triggering, device work.By C, meet an auxiliary triode thyristor T
2, parallel branch, when electric leakage or short trouble occur for joined electric power system, relaying protection link is sent cut-offing instruction fast, triggers T
2conducting, the shutoff capacitor C of charging is to oikocryst lock T in advance
1apply back-pressure, force T
1turn-off.The complete shut-down break time of neutral point switch is less than 0.5ms.
The utlity model has the comprehensive advanced technology of fast break, its performance index are:
1) fast short-circuit protective, and guard space is: 50s;
Full break time < 1.5ms
2) mine rapid electric leakage protection, is limited to 3K Ω on single-phase earth leakage action setting value;
When < 1K Ω, full power-off time < 3.5K Ω;
During≤100 Ω, full power-off time < 1.5K Ω.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. electric coal drill protection equipment for transformer, it is characterized in that: this device mainly comprises guide's starting circuit, rapid cut-off sample circuit and sampling circuit of electric leakage, logic analysis circuit, neutral point switch and state operation show fast, described rapid cut-off sample circuit, quick sampling circuit of electric leakage and neutral point switch access three-phase high-voltage, described guide's starting circuit also accesses three-phase high-voltage;
Described rapid cut-off sample circuit, quick sampling circuit of electric leakage, neutral point switch and guide's starting circuit are connected with logic analysis circuit respectively, and described logic analysis circuit also shows and is connected with state operation.
2. electric coal drill protection equipment for transformer according to claim 1, is characterized in that: between described quick sampling circuit of electric leakage and three-phase high-voltage, be provided with capacitor.
3. electric coal drill protection equipment for transformer according to claim 1, is characterized in that: described logic analysis circuit is directly by Power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320708769.XU CN203589700U (en) | 2013-11-12 | 2013-11-12 | Electric coal drill transformer protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320708769.XU CN203589700U (en) | 2013-11-12 | 2013-11-12 | Electric coal drill transformer protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203589700U true CN203589700U (en) | 2014-05-07 |
Family
ID=50587552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320708769.XU Expired - Fee Related CN203589700U (en) | 2013-11-12 | 2013-11-12 | Electric coal drill transformer protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203589700U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI571329B (en) * | 2016-03-02 | 2017-02-21 | 中國鋼鐵股份有限公司 | Method for tracking metal rolling |
-
2013
- 2013-11-12 CN CN201320708769.XU patent/CN203589700U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI571329B (en) * | 2016-03-02 | 2017-02-21 | 中國鋼鐵股份有限公司 | Method for tracking metal rolling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20201112 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |