CN201829925U - Leakage protector - Google Patents
Leakage protector Download PDFInfo
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- CN201829925U CN201829925U CN201020543752XU CN201020543752U CN201829925U CN 201829925 U CN201829925 U CN 201829925U CN 201020543752X U CN201020543752X U CN 201020543752XU CN 201020543752 U CN201020543752 U CN 201020543752U CN 201829925 U CN201829925 U CN 201829925U
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- line
- switch
- control
- control module
- detection module
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- 230000001012 protector Effects 0.000 title abstract description 4
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000001681 protective effect Effects 0.000 claims description 21
- 239000004698 Polyethylene Substances 0.000 abstract 8
- -1 polyethylene Polymers 0.000 abstract 1
- 229920000573 polyethylene Polymers 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 5
- 230000002950 deficient Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model provides a leakage protector which comprises a detection module, a control module, a master switch and a PE (polyethylene) line control switch, wherein the leakage current detection module is connected with a live line, a zero line and the control module respectively, and is used for sending a warning signal to the control module when detecting that earth leakage current exists on the live line, the zero line and/or the PE line; the control module is connected with the master switch and the PE line control switch respectively, and controls the master switch and the PE line control switch to be disconnected simultaneously when receiving the warning signal from the detection module; the master switch is connected with the live line and the zero line respectively, and controls the connection or the disconnection of the live line and the zero line by connecting or disconnecting; and the PE line control switch is connected with the PE line, and controls the connection or the disconnection of the PE line by connecting and disconnecting. The leakage protector can play the role of protecting in an omnidirectional way.
Description
Technical field
The utility model relates to a kind of protector, relates in particular to a kind of earth leakage protective device.
Background technology
Thereby existing leakage switch or earth leakage protective device are the unsymmetrical current Δ In that the phase line Leaked Current of Line to Ground produces to be detected control reach the protection purpose, but it can not play a protective role under the situation of NPE tape electricity, can cause on the contrary to get an electric shock or fatal accident.
Present domestic low-voltage power supply system is all according to the IEC-TN standard formulation, because just there is defective in the TN system of IEC when formulating, thus TN-C-S, TN-S, TN-C have appearred with regard to improvement, but also fail to jump out the category of TN system, so defective exists all the time.For the defective people that remedy the TN system have developed earth leakage protective device at the TN system specifications again; but it is same owing to be to research and develop according to the standard of TN system; so only remedied the part defective of TN system; and fail thoroughly to solve existing root problem in the TN system, cause it when operation, to have the possibility of getting an electric shock.
Summary of the invention
The purpose of this utility model is to provide a kind of earth leakage protective device, does not get an electric shock or fatal accident even also can not cause when NPE tape electricity, reaches electrical appliance is thoroughly separated with electrical network, plays the effect of omnibearing protection.
In order to achieve the above object, the utility model provides a kind of earth leakage protective device, comprises detection module, control module, main switch and PE line control switch, wherein,
Described leakage current detection module is connected with described live wire, described zero line and described control module respectively, is used for when detecting live wire, zero line and/or PE line and have Ground leakage current, sends warning signal to described control module;
Described control module is connected with described PE line control switch with described main switch respectively, when the warning signal that receives from described detection module, controls described main switch and described PE line control switch disconnects simultaneously;
Described main switch, it is connected with described zero line with described live wire respectively, its conducting, disconnect described live wire of control and described zero line conducting, open circuit;
Described PE line control switch, it is connected with described PE line, its conducting, disconnect the described PE line of control conducting, open circuit.
During enforcement, described main switch, described PE line control switch are respectively the contact of the Synchronization Control in the switch.
Compared with prior art, earth leakage protective device described in the utility model does not get an electric shock or fatal accident even can not cause when NPE tape electricity yet, reaches electrical appliance is thoroughly separated with electrical network, plays the effect of omnibearing protection.
Description of drawings
Fig. 1 is the structure chart of an embodiment of earth leakage protective device described in the utility model;
Fig. 2 is the structure chart of another embodiment of earth leakage protective device described in the utility model;
Fig. 3 is the structure chart of earth leakage protective device one specific embodiment described in the utility model;
Fig. 4 is the structure chart of another specific embodiment of earth leakage protective device described in the utility model.
Embodiment
Since during the operation of present TN system because the NPE line is a bit to link to each other; at system's three-phase imbalance; triple-frequency harmonics; all there was voltage and current in various degree in the N line when single-phase (wink) ground connection or NPE earth terminal resistance became big the open circuit; the casing of electrical appliance generally all is to be connected on (being the NPE line) on the PE line; when there is the Δ In electric current that produces when leaking electricity in the LN line; earth leakage protective device moves and deenergization; reached the protection purpose; but the just L1 line that earth leakage protective device disconnects when NPE tape electricity; the L2 line; the L3 line; N line or LN line; the shell of PE line and electrical appliance links to each other; because the NPE line is a bit to link to each other; the shell that is exactly electrical appliance does not disconnect with the electrical appliance power supply, thereby the shell of electrical appliance and N line are idiostaticly just may produce electric shock or fatal accident.
Therefore, the utility model provides a kind of earth leakage protective device, and the PE line control switch that has increased by a group and main switch contact Synchronization Control on the PE line to be cutting off the PE line, thereby makes electrical appliance thoroughly break away from the purpose that power supply reaches protection.
As shown in Figure 1, the circuit diagram when earth leakage protective device described in the utility model is applied to three-phase circuit, earth leakage protective device described in the utility model comprise detection module 11, control module 12, main switch 13 and PE line control switch 14, wherein,
Described leakage current detection module 11 is connected with described live wire, described zero line and described control module 12 respectively, is used for when detecting live wire and/or zero line and have Ground leakage current, sends warning signal to described control module 12;
Described control module 12 is connected with described PE line control switch 14 with described main switch 13 respectively, when the warning signal that receives from described detection module, controls described main switch 13 and described PE line control switch 14 disconnects simultaneously;
Described main switch 13, it is connected with described zero line with described live wire respectively, its conducting, disconnect described live wire of control and described zero line conducting, open circuit;
Described PE line control switch 14, it is connected with the PE line, its conducting, disconnect the described PE line of control conducting, open circuit.
According to a kind of concrete execution mode, the circuit diagram when earth leakage protective device described in the utility model is applied to single phase circuit.
During enforcement, as shown in Figure 3, Figure 4, described main switch, described PE line control switch can be respectively the contact of the Synchronization Control in the switch.
Earth leakage protective device described in the utility model has been owing to increased detection to PE line Ground leakage current, and realized when detecting leakage current PE line and zero line and live wire are disconnected synchronously, thereby reached the purpose that makes electric thorough disengaging power supply and protect.
More than explanation is just illustrative for the utility model; and it is nonrestrictive; those of ordinary skills understand; under the situation of the spirit and scope that do not break away from claims and limited; can make many modifications, variation or equivalence, but all will fall in the protection range of the present utility model.
Claims (2)
1. an earth leakage protective device is characterized in that, comprises detection module, control module, main switch and PE line control switch, wherein,
Described leakage current detection module is connected with described live wire, described zero line and described control module respectively, is used for when detecting live wire, zero line and/or PE line and have Ground leakage current, sends warning signal to described control module;
Described control module is connected with described PE line control switch with described main switch respectively, when the warning signal that receives from described detection module, controls described main switch and described PE line control switch disconnects simultaneously;
Described main switch, it is connected with described zero line with described live wire respectively, its conducting, disconnect described live wire of control and described zero line conducting, open circuit;
Described PE line control switch, it is connected with described PE line, its conducting, disconnect the described PE line of control conducting, open circuit.
2. earth leakage protective device as claimed in claim 1 is characterized in that, described main switch, described PE line control switch are respectively the contact of the Synchronization Control in the switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020543752XU CN201829925U (en) | 2010-09-27 | 2010-09-27 | Leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020543752XU CN201829925U (en) | 2010-09-27 | 2010-09-27 | Leakage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201829925U true CN201829925U (en) | 2011-05-11 |
Family
ID=43968439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020543752XU Expired - Fee Related CN201829925U (en) | 2010-09-27 | 2010-09-27 | Leakage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201829925U (en) |
-
2010
- 2010-09-27 CN CN201020543752XU patent/CN201829925U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160308 Address after: 150010 Heilongjiang city of Harbin province Daoli District Shangzhi Street No. 188 Patentee after: Harbin Power Supply Company, State Grid Heilongjiang Electric Power Co., Ltd. Patentee after: State Grid Corporation of China Patentee after: Zhao Chunguang Address before: 150700 Testing Institute of Yanshou Electric Power Bureau, Heilongjiang, Harbin Patentee before: Zhao Chunguang |
|
| 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: 20110511 Termination date: 20180927 |