CN2899225Y - Break zero-loss phase protecting distribution box - Google Patents
Break zero-loss phase protecting distribution box Download PDFInfo
- Publication number
- CN2899225Y CN2899225Y CN 200620070545 CN200620070545U CN2899225Y CN 2899225 Y CN2899225 Y CN 2899225Y CN 200620070545 CN200620070545 CN 200620070545 CN 200620070545 U CN200620070545 U CN 200620070545U CN 2899225 Y CN2899225 Y CN 2899225Y
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- Prior art keywords
- phase
- supply
- power
- distribution box
- loop
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- Expired - Fee Related
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Abstract
The utility model relates to a break zero-loss phase protecting distribution box for distribution change low voltage side outdoor, belonging to power-supply establishment technical field, which introduces a three-phase power-supply voltage, the three-phase power-supply end is connected with the line out end by a power-supply contactor, the three-phase power-supply line is connected with the input of a three-phase voltage balance relay, the output of the three-phase voltage balance relay loop is connected with a residual current protector loop corresponding to the power-supply lines by the controlled constant open touch point, at the same time the constant open touch point of the relevant residual current protector is connected with the power-supply contactor loop, forming a loop. Furthermore, the induction loop of the constant open touch point of the residual current protector is controlled to couple in the out line end, and the middle line member of the out line end is connected with the earth by a break zero relay loop and a parallel connection break zero touch point controlled by loop. The utility model adopts the distribution box, which can cut the power supply automatically and quickly whether the power-supply line is loss phase or break zero, thereby avoiding the burn of the devices in the box and the attaint of the appliance to guarantee the safety.
Description
Technical field
The utility model relates to a kind of distribution box, and the disconnected zero open-phase protection distribution box of especially a kind of distribution transforming low-pressure side open air belongs to the power supply facilities technical field.
Background technology
Last century end, country has dropped into substantial contribution large-scale electric network reconstruction has been carried out in city suburbs and rural area, takes the principle of the low meter of the high confession of the densely covered point of short radius, and the distribution transforming low-pressure side uses distributed board outdoor to do the electricity consumption master control, its advantage is that volume is little, does not take up space.But some shortcomings have in use also been exposed gradually.For example, the short circuit of generating heat easily causes box equipment to burn; And for example, disconnected neutral line fault appears in distribution box easily, causes a large amount of household electrical appliance of client to damage, and causes power supply reparations accident; Phase-deficient operations such as 10KV fuse blows cause client 380V220V electrical damage.For another example, summer high temperature causes residual current operated protective device malfunction or malfunctioning easily, the tripping operation of unknown cause occurs, causes power failure, causes customer complaint.
The utility model content
The purpose of this utility model is: at the shortcoming of above prior art existence; by the design improvement control circuit; propose a kind of when phase shortage and disconnected neutral line fault occurring; the disconnected zero open-phase protection distribution box that can in time cut off the electricity supply; thereby guarantee client's Electrical Safety, avoid household electrical appliance to burn.
In order to reach above purpose; open-phase protection distribution box of the present utility model comprises the three phase supply end; described three phase supply end picks out line end by the power supply contactor; described three-phase power line also connects the input of three-phase voltage balance relay coil; the output of described three-phase voltage balance relay coil connects the residual current operated protective device coil corresponding with supply line through the normally opened contact of its control, and (one tunnel outlet then has a residual current operated protective device control; the rest may be inferred; 2 the tunnel 2; 3 the tunnel 3); residual current operated protective device normally opened contact through correspondence connects the power supply contactor coil simultaneously, forms the loop.In addition, the induction coil of control residual current operated protective device normally opened contact is coupling in leading-out terminal, and described leading-out terminal neutral line terminal is through the disconnected zero contact earth connection of the parallel connection of disconnected zero relay coil and the control of this coil.
Like this, when supply line's phase shortage takes place, will stop the outlet power supply automatically, thereby avoid the liability accident of powering.When distribution box generation overload short circuit or distribution transformer neutral line pile crown oxidation broken string, neutral line outlet voltage raises, and forms voltage over the ground, forms leakage current when reaching rated value, causes residual current operated protective device action cut-out power supply protection safety.Therefore, adopt above distribution box of the present utility model after, no matter still zero the time, can both cut off power supply automatically rapidly, thereby avoid box equipment to burn and client's household electrical appliance damage in a large number disconnected in supply line's phase shortage, guarantee safe in utilization.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the circuit theory diagrams of an embodiment of the utility model.
Embodiment
Embodiment one
The disconnected zero open-phase protection distribution box circuit theory of present embodiment as shown in Figure 1; the 10KV fuse blows that causes at some areas user thunderbolt causes the problem of distribution transforming phase-deficient operation; open-phase protection has been installed in design additional in distribution box, effectively protects client's electrical safety.In addition, because the generation in every year of the interior disconnected neutral line accident of the case that overload short circuit etc. cause is a lot of, the power supply liability accident that causes reaches hundreds of thousands unit to the reparations of client's household electrical appliance every year in the rural power grids distribution box, designs for this reason and has installed disconnected zero protection of distribution transforming distribution box additional.
Specific design is as follows: 1, three-phase power line U, V, W pick out line end 1,2 (representing three-phase output with a line among the figure) by first, second power supply contacts of contactor K1, K2 respectively.Three-phase power line connects the input of three-phase voltage balance relay coil simultaneously; the output of this three-phase voltage balance relay coil meets first, second residual current operated protective device coil S1, S2 in parallel through the normally opened contact J of its control; meet first, second power supply contactor coil K1, K2 respectively through first, second residual current operated protective device normally opened contact S1, the S2 of parallel connection simultaneously, form the loop.Voltage just often, three-phase voltage balance relay J adhesive operate as normal; When taking place, voltage have one to raise mutually or during phase shortage, the three-phase voltage balance relay disconnects S1, S2 power supply rapidly, S1, S2 outage, and circuit outlet 1 and outlet 2 are stopped power supply, thereby avoid taking place phase-deficient operation and overvoltage fault, guarantee safe power supply.
2, induction coil S1, the S2 of control residual current operated protective device normally opened contact are coupling in leading-out terminal 1 and the sub-N1 of 2, two leading-out terminal neutral terminals, N2 respectively respectively through the disconnected zero contact earth connection of the parallel connection of disconnected zero relay coil F1, F2 and the control of this coil.During normal power supply, disconnected zero relay coil F1, F2 must not be electric, not adhesive of no-voltage, and the normally opened contact of its control disconnects, and line powering is normal.And when abnormal conditions appear in certain road disconnected neutral line of generation operation troubles (when the neutral line is broken in for example distribution box generation overload, the disconnected neutral line of short circuit or the oxidation of distribution transformer neutral line pile crown); this road leading-out terminal zero line is because the rising of neutral point asymmetrical voltage; can form voltage over the ground; make coil F1 or F2 adhesive normally opened contact closure when reaching 36V; form leakage current; cause that corresponding induction coil moved the residual current operated protective device contact in 0.4 second; cut off this road power supply; avoid electrical equipment damage in the circuit, guarantee safe in utilization.
In addition; the disconnected zero open-phase protection distribution box of present embodiment also is furnished with: the temperature detection controller; the detection signal input termination of described controller is placed in the temperature sensor in the distribution box; its control output end connects the fan that is installed in the distribution box, and the casing upper and lower of described distribution box has venthole and air admission hole.
Like this, in case detecting the temperature inside the box, temperature sensor surpasses predetermined value, to in time start fan by controller, between air admission hole and venthole, form forced convertion, rapid radiating and cooling, thereby avoid guaranteeing the reliability of distribution box powered operation owing to the too high all multiple faultss such as electronic equipment malfunction that cause of temperature.
Facts have proved that the disconnected zero open-phase protection distribution box of present embodiment is reliable, practical.In addition to the implementation, the utility model can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of the utility model requirement.
Claims (2)
1. disconnected zero open-phase protection distribution box, comprise the three phase supply end, described three phase supply end picks out line end by the power supply contactor, it is characterized in that: described three-phase power line also connects the input of three-phase voltage balance relay coil, the output of described three-phase voltage balance relay coil connects the residual current operated protective device coil corresponding with supply line through the normally opened contact of its control, residual current operated protective device normally opened contact through correspondence connects the power supply contactor coil simultaneously, forms the loop; The induction coil of control residual current operated protective device normally opened contact is coupling in leading-out terminal, and described leading-out terminal neutral line terminal is through the disconnected zero contact earth connection of the parallel connection of disconnected zero relay coil and the control of this coil.
2. according to the described disconnected zero open-phase protection distribution box of claim 1; it is characterized in that: also contain the temperature detection controller; the detection signal input termination of described controller is placed in the temperature sensor in the distribution box; its control output end connects the fan that is installed in the distribution box, and the casing upper and lower of described distribution box has venthole and air admission hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620070545 CN2899225Y (en) | 2006-03-23 | 2006-03-23 | Break zero-loss phase protecting distribution box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620070545 CN2899225Y (en) | 2006-03-23 | 2006-03-23 | Break zero-loss phase protecting distribution box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2899225Y true CN2899225Y (en) | 2007-05-09 |
Family
ID=38074557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620070545 Expired - Fee Related CN2899225Y (en) | 2006-03-23 | 2006-03-23 | Break zero-loss phase protecting distribution box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2899225Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106257782A (en) * | 2016-05-30 | 2016-12-28 | 曹德祥 | Ac leakage drives protector |
| CN113422351A (en) * | 2021-04-28 | 2021-09-21 | 福建省建筑设计研究院有限公司 | Distribution box zero-breaking protection technology and zero-breaking protection distribution box applying same |
-
2006
- 2006-03-23 CN CN 200620070545 patent/CN2899225Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106257782A (en) * | 2016-05-30 | 2016-12-28 | 曹德祥 | Ac leakage drives protector |
| CN106257782B (en) * | 2016-05-30 | 2018-05-22 | 曹德祥 | Ac leakage drives protector |
| CN113422351A (en) * | 2021-04-28 | 2021-09-21 | 福建省建筑设计研究院有限公司 | Distribution box zero-breaking protection technology and zero-breaking protection distribution box applying same |
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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: 20070509 Termination date: 20150323 |
|
| EXPY | Termination of patent right or utility model |