CN202395417U - Mine electric excavator cable ground protection device - Google Patents
Mine electric excavator cable ground protection device Download PDFInfo
- Publication number
- CN202395417U CN202395417U CN2011205292991U CN201120529299U CN202395417U CN 202395417 U CN202395417 U CN 202395417U CN 2011205292991 U CN2011205292991 U CN 2011205292991U CN 201120529299 U CN201120529299 U CN 201120529299U CN 202395417 U CN202395417 U CN 202395417U
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- China
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- relay
- nand gate
- gate circuit
- voltage
- zero
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- Expired - Fee Related
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Abstract
The utility model discloses a mine electric excavator cable ground protection device which comprises a zero-sequence mutual inductor, a Hall sensor, a voltage sensor, an NAND gate circuit, a relay and a vacuum contactor, wherein the zero-sequence mutual inductor is connected with the Hall sensor; the Hall sensor and the voltage sensor are connected with the NAND gate circuit respectively; the NAND gate circuit is connected with the relay; and the relay is connected with the vacuum contactor. In the utility model, the voltage and zero-sequence current are both used as electric leakage conditions, and the device can not act unless the voltage and zero-sequence current are reached at the same time, thus the malfunctions are reduced, and the leakage current of the cable can be effectively detected.
Description
Technical field
The utility model relates to a kind of mining electric excavator cable grounding protective device.
Background technology
Electric excavator is the capital equipment of surface mine digging ore, and its power supply is generally the 6-10 kilovolt from a high-tension cable; High-tension cable one terminates on the high pressure stringing, and the other end is connected on the high-voltage connection terminal of electric excavator bottom, and length is generally 100-400 rice; Mid portion then falls to the ground; If the cable outer damage might produce Leakage Current over the ground, jeopardize personal safety.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of simple in structure, mining electric excavator cable grounding protective device that can effectively detect cable leakage stream.
The technical scheme that the utility model solves above-mentioned technical problem is: comprise ZCT, Hall element, voltage sensor, NAND gate circuit, relay and vacuum contactor; Described ZCT is connected with Hall element; Hall element is connected with NAND gate circuit respectively with voltage sensor; NAND gate circuit is connected with relay, and relay is connected with vacuum contactor.
Because adopt technique scheme, the beneficial effect of the utility model is: this utility model simultaneously as drain conditions, has only voltage and zero-sequence current when the two satisfies simultaneously and just moves, and has reduced misoperation, can effectively detect cable leakage and flow.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation:
As shown in Figure 1; A kind of mining electric excavator cable grounding protective device; Comprise ZCT, Hall element, voltage sensor, NAND gate circuit, relay and vacuum contactor, described ZCT is connected with Hall element, and Hall element is connected with NAND gate circuit respectively with voltage sensor; NAND gate circuit is connected with relay, and relay is connected with vacuum contactor.
The operation principle of the utility model is: cable is passed ZCT, if cable produces Leakage Current over the ground, then ZCT then produces the electric current of a 0 ~ 200mA; This electric current inserts Hall element, produces the direct voltage of a 0 ~ 5V through shaping with after isolating, and this voltage is input in the NAND gate circuit; The voltage that in addition voltage sensor is produced is sent in the NAND gate circuit; When two conditions satisfy simultaneously, produce a high level, engage relay; Thereby the connection vacuum contactor cuts off major loop through vacuum contactor.
Claims (1)
1. mining electric excavator cable grounding protective device; It is characterized in that: comprise ZCT, Hall element, voltage sensor, NAND gate circuit, relay and vacuum contactor; Described ZCT is connected with Hall element; Hall element is connected with NAND gate circuit respectively with voltage sensor, and NAND gate circuit is connected with relay, and relay is connected with vacuum contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205292991U CN202395417U (en) | 2011-12-17 | 2011-12-17 | Mine electric excavator cable ground protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205292991U CN202395417U (en) | 2011-12-17 | 2011-12-17 | Mine electric excavator cable ground protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202395417U true CN202395417U (en) | 2012-08-22 |
Family
ID=46670319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205292991U Expired - Fee Related CN202395417U (en) | 2011-12-17 | 2011-12-17 | Mine electric excavator cable ground protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202395417U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734114A (en) * | 2015-02-25 | 2015-06-24 | 余姚市嘉荣电子电器有限公司 | Optocoupling detection ground wire voltage abnormity and earth leakage protection device |
| CN110736946A (en) * | 2018-07-19 | 2020-01-31 | Tdk-Micronas有限公司 | Hall sensor |
-
2011
- 2011-12-17 CN CN2011205292991U patent/CN202395417U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734114A (en) * | 2015-02-25 | 2015-06-24 | 余姚市嘉荣电子电器有限公司 | Optocoupling detection ground wire voltage abnormity and earth leakage protection device |
| CN110736946A (en) * | 2018-07-19 | 2020-01-31 | Tdk-Micronas有限公司 | Hall sensor |
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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: 20120822 Termination date: 20141217 |
|
| EXPY | Termination of patent right or utility model |