CN204012658U - Distribution transformer broken neutral line protective device - Google Patents
Distribution transformer broken neutral line protective device Download PDFInfo
- Publication number
- CN204012658U CN204012658U CN201420345155.4U CN201420345155U CN204012658U CN 204012658 U CN204012658 U CN 204012658U CN 201420345155 U CN201420345155 U CN 201420345155U CN 204012658 U CN204012658 U CN 204012658U
- Authority
- CN
- China
- Prior art keywords
- contactor
- neutral line
- distribution transformer
- broken neutral
- pressure side
- Prior art date
- 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.)
- Expired - Fee Related
Links
- 230000007935 neutral effect Effects 0.000 title claims abstract description 38
- 230000001681 protective effect Effects 0.000 title claims abstract description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 18
- 239000010703 silicon Substances 0.000 claims abstract description 18
- 230000003068 static effect Effects 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model provides distribution transformer broken neutral line protective device, it comprises broken neutral line signal sample circuit, SCR control loop and A.C. contactor execution loop, wherein, described broken neutral line signal sample circuit comprises divider resistance R and piezo-resistance RU, described SCR control loop comprises controllable silicon V1, rectifier diode V2 and relay, and described A.C. contactor is carried out loop and comprised an A.C. contactor; The utility model, by detecting neutral line abnormal overvoltage, is controlled A.C. contactor and is disconnected distribution transformer low-pressure side out-put supply, the harm to single-phase electrical appliance of having avoided distribution transformer low-pressure side broken neutral line to cause.The utility model circuit design rationally easy, action sensitivity is high, operation characteristic is desirable, safe and reliable; can be widely used in the supply line of rural power distribution system share transformer; anti-as distribution transformer broken neutral line protective device, guarantee for Electrical Safety.
Description
Technical field
The utility model relates to a kind of broken neutral line protective device, specifically, has related to a kind of distribution transformer broken neutral line protective device.
Background technology
In the supply line of rural power distribution system share transformer, power mode mostly is household electricity, and single-phase load is many, electrical appliance as single-phase in illuminating lamp, TV, computer etc.These single-phase electrical appliances, are often difficult to be evenly distributed in three phase lines, make threephase load electric current extremely uneven, cause neutral return path electric current to increase, and cause the neutral line binding post heating of distribution transformer low-pressure side, until the neutral line is blown.If the neutral line of distribution transformer low-pressure side disconnects, will certainly produce abnormal overvoltage.Now, rated operational voltage is the electrical appliance of 220V phase voltage, will bear the line voltage of 380V, and this will certainly cause seriously burning of single-phase electrical appliance.Therefore, how preventing the harm that this broken neutral line phenomenon causes, is the problem that people are worth thinking.
Utility model content
The purpose of this utility model is for the deficiencies in the prior art, thereby a kind of distribution transformer broken neutral line protective device is provided.
To achieve these goals, the technical scheme that the utility model adopts is: a kind of distribution transformer broken neutral line protective device, and it comprises broken neutral line signal sample circuit, SCR control loop and A.C. contactor execution loop; Described broken neutral line signal sample circuit comprises divider resistance R and piezo-resistance RU, and one end of described piezo-resistance RU is connected on the distribution transformer low-pressure side neutral line, and the other end of described piezo-resistance RU is connected to ground terminal by described divider resistance R; Described SCR control loop comprises controllable silicon V1, rectifier diode V2 and relay, the control utmost point of described controllable silicon V1 connects the dividing point of described piezo-resistance RU and described divider resistance R, the negative electrode of described controllable silicon V1 connects ground terminal, the negative electrode of rectifier diode V2 described in the anodic bonding of described controllable silicon V1, one end of the coil J of relay described in the anodic bonding of described rectifier diode V2, the other end of the coil J of described relay is connected in distribution transformer low-pressure side one phase line; One end of the dynamic circuit breaker switch J1-1 of described relay is connected in distribution transformer low-pressure side one phase line, and the other end is as the output in this SCR control loop; Described A.C. contactor is carried out loop and is comprised an A.C. contactor, wherein, the two ends of the dynamic/static contact FK of described A.C. contactor connect respectively distribution transformer low-pressure side and by electric loading, one end of the coil CJ of described A.C. contactor is connected in mating piezoelectric transformer low-pressure side one phase line, and the other end is successively by the auxiliary dynamic circuit breaker stop button TAN of described A.C. contactor and the auxiliary moving output that the QAN that releases the button is connected to described SCR control loop that closes of described A.C. contactor.
Based on above-mentioned, described A.C. contactor is CJ-20 type A.C. contactor.
Based on above-mentioned, described relay is electromagnetic type relay.
Based on above-mentioned, described controllable silicon V1 is single-phase silicon-controlled.
The relative prior art of the utility model has substantive distinguishing features and progress, specifically, the utility model is by detecting neutral line abnormal overvoltage, control A.C. contactor and disconnect distribution transformer low-pressure side out-put supply, the harm to single-phase electrical appliance of having avoided distribution transformer low-pressure side broken neutral line to cause.The utility model circuit design rationally easy, action sensitivity is high, operation characteristic is desirable, safe and reliable; can be widely used in the supply line of rural power distribution system share transformer; anti-as distribution transformer broken neutral line protective device, guarantee for Electrical Safety.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of the utility model distribution transformer broken neutral line protective device.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
As shown in Figure 1, a kind of distribution transformer broken neutral line protective device, it comprises broken neutral line signal sample circuit, SCR control loop and A.C. contactor execution loop.
Described broken neutral line signal sample circuit comprises divider resistance R and piezo-resistance RU, and it is upper that one end of described piezo-resistance RU is connected in distribution transformer low-pressure side neutral line UN, and the other end of described piezo-resistance RU is connected to ground terminal by described divider resistance R.
Described SCR control loop comprises single-phase silicon-controlled V1, rectifier diode V2 and electromagnetic type relay, the control utmost point of described single-phase silicon-controlled V1 connects the dividing point of described piezo-resistance RU and described divider resistance R, the negative electrode of described single-phase silicon-controlled V1 connects ground terminal, the negative electrode of rectifier diode V2 described in the anodic bonding of described single-phase silicon-controlled V1, one end of the coil J of relay described in the anodic bonding of described rectifier diode V2, the other end of the coil J of described relay is connected on distribution transformer low-pressure side phase line UC; It is upper that one end of the dynamic circuit breaker switch J1-1 of described relay is connected in distribution transformer low-pressure side phase line UB, and the other end is as the output in this SCR control loop.
Described A.C. contactor is carried out loop and is comprised a CJ-20 type A.C. contactor, wherein, the two ends of the dynamic/static contact FK of described A.C. contactor connect respectively distribution transformer low-pressure side and by electric loading, it is upper that one end of the coil CJ of described A.C. contactor is connected in mating piezoelectric transformer low-pressure side phase line UC, and the other end is successively by the auxiliary dynamic circuit breaker stop button TAN of described A.C. contactor and the auxiliary moving output that the QAN that releases the button is connected to described SCR control loop that closes of described A.C. contactor.
When device comes into operation, first start the auxiliary moving QAN that releases the button that closes of described A.C. contactor, the dynamic/static contact FK of described A.C. contactor connects distribution transformer low-pressure side and by electric loading, wherein, the auxiliary dynamic circuit breaker stop button TAN of described A.C. contactor is as the stop button of device, cuts off at any time distribution transformer low-pressure side and with the connection of electric loading.When the neutral line of distribution transformer low-pressure side disconnects generation abnormal overvoltage, piezo-resistance RU in described broken neutral line signal sample circuit collects overvoltage, single-phase silicon-controlled V1 conducting in described SCR control loop, then the coil J of described relay obtains electric, the dynamic circuit breaker switch J1-1 of described relay disconnects, described A.C. contactor is carried out the ac contactor coil CJ power-off in loop, thereby described A.C. contactor decompression power-off tripping operation, namely disconnect distribution transformer low-pressure side to using electric loading out-put supply, thereby the harm to single-phase electrical appliance of having avoided distribution transformer broken neutral line to cause.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characterictic is equal to replacement embodiment of the present utility model; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (4)
1. a distribution transformer broken neutral line protective device, is characterized in that: it comprises broken neutral line signal sample circuit, SCR control loop and A.C. contactor execution loop; Described broken neutral line signal sample circuit comprises divider resistance R and piezo-resistance RU, and one end of described piezo-resistance RU is connected on the distribution transformer low-pressure side neutral line, and the other end of described piezo-resistance RU is connected to ground terminal by described divider resistance R; Described SCR control loop comprises controllable silicon V1, rectifier diode V2 and relay, the control utmost point of described controllable silicon V1 connects the dividing point of described piezo-resistance RU and described divider resistance R, the negative electrode of described controllable silicon V1 connects ground terminal, the negative electrode of rectifier diode V2 described in the anodic bonding of described controllable silicon V1, one end of the coil J of relay described in the anodic bonding of described rectifier diode V2, the other end of the coil J of described relay is connected in distribution transformer low-pressure side one phase line; One end of the dynamic circuit breaker switch J1-1 of described relay is connected in distribution transformer low-pressure side one phase line, and the other end is as the output in this SCR control loop; Described A.C. contactor is carried out loop and is comprised an A.C. contactor, wherein, the two ends of the dynamic/static contact FK of described A.C. contactor connect respectively distribution transformer low-pressure side and by electric loading, one end of the coil CJ of described A.C. contactor is connected in mating piezoelectric transformer low-pressure side one phase line, and the other end is successively by the auxiliary dynamic circuit breaker stop button TAN of described A.C. contactor and the auxiliary moving output that the QAN that releases the button is connected to described SCR control loop that closes of described A.C. contactor.
2. distribution transformer broken neutral line protective device according to claim 1, is characterized in that: described A.C. contactor is CJ-20 type A.C. contactor.
3. distribution transformer broken neutral line protective device according to claim 1, is characterized in that: described relay is electromagnetic type relay.
4. distribution transformer broken neutral line protective device according to claim 1, is characterized in that: described controllable silicon V1 is single-phase silicon-controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420345155.4U CN204012658U (en) | 2014-06-26 | 2014-06-26 | Distribution transformer broken neutral line protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420345155.4U CN204012658U (en) | 2014-06-26 | 2014-06-26 | Distribution transformer broken neutral line protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204012658U true CN204012658U (en) | 2014-12-10 |
Family
ID=52052601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420345155.4U Expired - Fee Related CN204012658U (en) | 2014-06-26 | 2014-06-26 | Distribution transformer broken neutral line protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204012658U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065035A (en) * | 2014-06-26 | 2014-09-24 | 河南开启电力实业有限公司 | Distribution transformer neutral line breaking protection device |
| CN106159889A (en) * | 2016-06-29 | 2016-11-23 | 华南理工大学 | A kind of under-voltage detection on-off circuit based on non-linear to voltage element |
| CN111884189A (en) * | 2020-09-02 | 2020-11-03 | 国网安徽省电力有限公司宣城供电公司 | Zero-phase open circuit protection circuit breaker |
-
2014
- 2014-06-26 CN CN201420345155.4U patent/CN204012658U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065035A (en) * | 2014-06-26 | 2014-09-24 | 河南开启电力实业有限公司 | Distribution transformer neutral line breaking protection device |
| CN106159889A (en) * | 2016-06-29 | 2016-11-23 | 华南理工大学 | A kind of under-voltage detection on-off circuit based on non-linear to voltage element |
| CN111884189A (en) * | 2020-09-02 | 2020-11-03 | 国网安徽省电力有限公司宣城供电公司 | Zero-phase open circuit protection circuit breaker |
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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: 20141210 Termination date: 20160626 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |