CN203278188U - Zero line breaking protection device - Google Patents
Zero line breaking protection device Download PDFInfo
- Publication number
- CN203278188U CN203278188U CN 201320187121 CN201320187121U CN203278188U CN 203278188 U CN203278188 U CN 203278188U CN 201320187121 CN201320187121 CN 201320187121 CN 201320187121 U CN201320187121 U CN 201320187121U CN 203278188 U CN203278188 U CN 203278188U
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- China
- Prior art keywords
- phase
- protection device
- zero line
- line
- relay
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- 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.)
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Abstract
The utility model discloses a zero line breaking protection device comprising a voltage coil, a single-phase bridge and a micro AC/DC relay. One end of the voltage coil is connected to a phase wire, and the other end of the voltage coil is connected to the micro AC/DC relay, and then is connected to the single-phase bridge. The utility model aims at providing a zero line breaking protection device having low cost and simple structure and capable of ensuring the safety of electrical equipment.
Description
Technical field
Background technology
The low voltage electric network of China generally adopts the three-phase four-wire power supply mode, and when low voltage electric network causes neutral line break for various reasons, supply power voltage will cause Voltage unbalance along with the difference of the payload on phase line.Because the distribution transformer secondary connection belongs to Y-connection, the neutral line break fault occurs in actual motion, can cause the large phase line brownout of load, and the phenomenon of the phase line overtension of loading little, the phase line of brownout can affect single-phase electricity equipment and normally use, the phase line of overtension might surpass the rated voltage of power consumption equipment, and this can reduce the useful life of electric equipment greatly, and serious even can burn power consumption equipment.And generally, neutral line break but can't cause power failure, and the user is difficult to discovery, and its harm has disguise.There is no at present effectively reliably, zero line break protection device is used for practice.
The utility model content
The utility model aims to provide a kind of with low cost, the zero line break protection device that can effectively guarantee power consumption equipment safety simple in structure.
The technical scheme that the utility model adopts is: a kind of zero line break protection device; it is characterized in that comprising potential winding, single-phase bridge, miniature AC-DC relay; potential winding one end is connected with phase line, the other end be connected to single-phase bridge after miniature AC-DC relay is connected.
Described single-phase bridge also is connected with adjustable resistance.
The beneficial effects of the utility model are: with low cost, simple in structure, can effectively protect for the neutral line break problem.
Description of drawings
Fig. 1 is the structural representation of a kind of zero line break protection device of the utility model.
Embodiment
The structure of an embodiment of the utility model; as shown in drawings; a kind of zero line break protection device; comprise potential winding 1, single-phase bridge 2, miniature AC-DC relay 3; potential winding 1 one ends are connected with any phase line of three phase lines in three-phase four-wire system, the other end be connected to single-phase bridge 2 after miniature AC-DC relay 3 is connected.Single-phase bridge 2 one ends are connected with N line in three-phase four-wire system, and the other end is by PE line ground connection.Miniature AC-DC relay 3 an also end is passed through PE line ground connection.In order to adapt to different operating positions, be connected with N line in three-phase four-wire system again can also connect adjustable resistance 4 after single-phase bridge 2 after.
In actual use, in the time of neutral line break, in the three-phase imbalance circuit, in three characteristics of the middle term four wire line, the electrical appliance of any phase will produce the voltage more than 12V with respect to the PE line, like this when work, after passing through single-phase bridge 2 rectifications between zero line and PE line, just can promote miniature AC-DC relay 3 closings of contact, thereby produce enough voltage, the release that promotes in circuit is threaded off, thereby make switch trip, cut off the electricity supply.In use, the effect of adjustable resistance 4 is to adjust reaction sensitivity of the present utility model.
Claims (1)
1. zero line break protection device; it is characterized in that comprising potential winding, single-phase bridge, miniature AC-DC relay; potential winding one end is connected with phase line, the other end be connected to single-phase bridge after miniature AC-DC relay is connected, described single-phase bridge also is connected with adjustable resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320187121 CN203278188U (en) | 2013-04-15 | 2013-04-15 | Zero line breaking protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320187121 CN203278188U (en) | 2013-04-15 | 2013-04-15 | Zero line breaking protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203278188U true CN203278188U (en) | 2013-11-06 |
Family
ID=49508516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320187121 Expired - Fee Related CN203278188U (en) | 2013-04-15 | 2013-04-15 | Zero line breaking protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203278188U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734128A (en) * | 2015-03-13 | 2015-06-24 | 国家电网公司 | Low-voltage distribution network null wire break protector |
-
2013
- 2013-04-15 CN CN 201320187121 patent/CN203278188U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734128A (en) * | 2015-03-13 | 2015-06-24 | 国家电网公司 | Low-voltage distribution network null wire break protector |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20200415 |