CN104052020A - Default phase, zero missing, null line breaking and short circuiting protecting device in low-voltage power supply system - Google Patents
Default phase, zero missing, null line breaking and short circuiting protecting device in low-voltage power supply system Download PDFInfo
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- CN104052020A CN104052020A CN201410260004.3A CN201410260004A CN104052020A CN 104052020 A CN104052020 A CN 104052020A CN 201410260004 A CN201410260004 A CN 201410260004A CN 104052020 A CN104052020 A CN 104052020A
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- relay
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- power supply
- overvoltage
- supply system
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Abstract
The invention relates to a default phase, zero missing, null line breaking and short circuiting protecting device in a low-voltage power supply system. The protecting device comprises an intermediate relay, a button and a contactor which are connected in series in sequence. The protecting device further comprises a first overvoltage relay, a second overvoltage relay and a third overvoltage relay. The first overvoltage relay controls the intermediate relay, and the second overvoltage relay and the third overvoltage relay control contactor through the intermediate relay. According to the protecting device, a power supply can be quickly turned off under any situation of default phase or zero missing or null line breaking in the low-voltage power supply system, and the protecting device is quick in outage, low in cost and convenient to operate.
Description
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Technical field
The present invention relates to phase shortage in a kind of low-voltage power supply system, lack zero, neutral line break and short-circuit protection.
Background technology
In daily production and life, at every moment all be unable to do without electricity, and Electrical Safety is particularly important.In low-voltage power supply system, with electric process there is suddenly phase shortage, lack zero, during neutral line break, power consumption equipment can be burnt, thereby causes unnecessary loss to our enterprise and resident.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, phase shortage in a kind of low-voltage power supply system is provided, lacks zero, neutral line break and short-circuit protection.This protective device power-off is fast, cost is low, easy and simple to handle.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: phase shortage in a kind of low-voltage power supply system, lack zero, neutral line break and short-circuit protection, described protective device comprises auxiliary relay, button, the contactor of order series connection; Described protective device also comprises the first overvoltage relay, the second overvoltage relay and the 3rd overvoltage relay, and wherein the first overvoltage relay is controlled auxiliary relay, and second, third overvoltage relay is through auxiliary relay control contactor.
Described the first overvoltage relay is replaceable is the first under-voltage relay, and described the second overvoltage relay is replaceable is the second under-voltage relay, and described the 3rd overvoltage relay is replaceable is the 3rd under-voltage relay.
The present invention be in low-voltage power supply system, there is any phase phase shortage, lack zero, protective device that the situation of neutral line break or short circuit can be cut off the electricity supply rapidly; Protective device power-off of the present invention is fast, cost is low, easy and simple to handle.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In the drawings, the 1, first overvoltage relay, the 2, second overvoltage relay, the 3, the 3rd overvoltage relay, 4, auxiliary relay, 5, button, 6, contactor.
Embodiment
Below principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, phase shortage in a kind of low-voltage power supply system, lack zero, neutral line break and short-circuit protection, described protective device comprises auxiliary relay 4, button 5, the contactor 6 of order series connection; Described protective device also comprises the first overvoltage relay 1, the second overvoltage relay 2 and the 3rd overvoltage relay 3, and wherein the first overvoltage relay 1 is controlled auxiliary relay 4, and second, third overvoltage relay is through auxiliary relay 4 control contactors 6.
Described the first overvoltage relay is replaceable is the first under-voltage relay, and described the second overvoltage relay is replaceable is the second under-voltage relay, and described the 3rd overvoltage relay is replaceable is the 3rd under-voltage relay.
The user of three phase and four wire circuit system has been installed this protective device additional, and three-phase phase voltage strange change occurs and surpassed certain scope (ceiling voltage of customization is 270V), and this protective device will automatic cut-off power.Voltage is lower than 160V, and this protective device also can be cut off the electricity supply.
Also can there is any phase phase shortage at high pressure (as 10kV circuit) in the present invention, transmission line is no matter any fault (as short circuit etc.) occurs, and this protective device can be cut off the electricity supply.
The present invention can summarize with other the concrete form without prejudice to spirit of the present invention or principal character.Therefore, no matter from which point, above-mentioned embodiment of the present invention all can only think explanation of the present invention can not limit the present invention, claims have been pointed out scope of the present invention, and scope of the present invention is not pointed out in above-mentioned explanation, therefore,, in the implication suitable with claims of the present invention and any change in scope, all should think to be included in the scope of claims.
Claims (2)
- Phase shortage in low-voltage power supply system, lack zero, neutral line break and short-circuit protection, it is characterized in that, described protective device comprises auxiliary relay, button, the contactor of order series connection; Described protective device also comprises the first overvoltage relay, the second overvoltage relay and the 3rd overvoltage relay, and wherein the first overvoltage relay is controlled auxiliary relay, and second, third overvoltage relay is through auxiliary relay control contactor.
- Phase shortage in low-voltage power supply system, lack zero, neutral line break and short-circuit protection; it is characterized in that; described the first overvoltage relay is replaceable is the first under-voltage relay; described the second overvoltage relay is replaceable is the second under-voltage relay, and described the 3rd overvoltage relay is replaceable is the 3rd under-voltage relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410260004.3A CN104052020A (en) | 2014-06-12 | 2014-06-12 | Default phase, zero missing, null line breaking and short circuiting protecting device in low-voltage power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410260004.3A CN104052020A (en) | 2014-06-12 | 2014-06-12 | Default phase, zero missing, null line breaking and short circuiting protecting device in low-voltage power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104052020A true CN104052020A (en) | 2014-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410260004.3A Pending CN104052020A (en) | 2014-06-12 | 2014-06-12 | Default phase, zero missing, null line breaking and short circuiting protecting device in low-voltage power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104052020A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298354A (en) * | 2018-11-14 | 2019-02-01 | 厦门科华恒盛股份有限公司 | The detection method and device of system zero-line failure are fallen in a kind of input of uninterruptible power supply |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1564411A (en) * | 2004-04-14 | 2005-01-12 | 余彦中 | Output circuit device of self-controlled breaking protective signal relay |
| CN202486268U (en) * | 2011-12-20 | 2012-10-10 | 中冶建工集团有限公司 | Voltage withstand test appliance for over-voltage protector |
| CN203537049U (en) * | 2013-07-15 | 2014-04-09 | 西安奥邦科技有限责任公司 | Switching control device for special emergency power supply of complete equipment of medium-frequency induction furnace |
-
2014
- 2014-06-12 CN CN201410260004.3A patent/CN104052020A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1564411A (en) * | 2004-04-14 | 2005-01-12 | 余彦中 | Output circuit device of self-controlled breaking protective signal relay |
| CN202486268U (en) * | 2011-12-20 | 2012-10-10 | 中冶建工集团有限公司 | Voltage withstand test appliance for over-voltage protector |
| CN203537049U (en) * | 2013-07-15 | 2014-04-09 | 西安奥邦科技有限责任公司 | Switching control device for special emergency power supply of complete equipment of medium-frequency induction furnace |
Non-Patent Citations (1)
| Title |
|---|
| 贾庆丰: "低压电气保护装置设计应用", 《农村电工》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298354A (en) * | 2018-11-14 | 2019-02-01 | 厦门科华恒盛股份有限公司 | The detection method and device of system zero-line failure are fallen in a kind of input of uninterruptible power supply |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140917 |