CN202333747U - Electric leakage protection device of guard ground system - Google Patents
Electric leakage protection device of guard ground system Download PDFInfo
- Publication number
- CN202333747U CN202333747U CN2011203993817U CN201120399381U CN202333747U CN 202333747 U CN202333747 U CN 202333747U CN 2011203993817 U CN2011203993817 U CN 2011203993817U CN 201120399381 U CN201120399381 U CN 201120399381U CN 202333747 U CN202333747 U CN 202333747U
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- earth leakage
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Abstract
The utility model discloses an electric leakage protection device of a guard ground system, which is composed of a main control module, a zero sequence current transformer, a signal processing circuit, an A/D converting module, a circuit temperature measuring module, a fire detecting module, a fire fighting linkage module, a multiplex selected action executing module, a main power, a leakage protector, an LCD display module and a keyboard module. The electric leakage protection device has the advantages of accurately judging the leakage current amplitude and phase, monitoring the circuit temperature in real time, preventing the fire, performing fire fighting linkage, and accurately processing the failure circuit according to the actual conditions.
Description
Technical field
The utility model relates to emergency protective device, especially a kind of protective earthing system earth leakage protective device.
Background technology
China resident electric power system generally adopts protection connecting to neutral system, along with promoting the use of of protective earthing system, the research of the earth leakage protective device of protective earthing system is had important function.Leak current fault has less can not the making effectively of leakage current and protects electrical equipment (circuit breaker, fuse) action in time to cut off power supply with respect to faults such as overcurrent, overvoltages.Tradition is insensitive owing to being failure to actuate with the earth leakage protective device of electromechanical, can not distinguish electric leakage and reach the amplitude size mutually, when or breaking out of fire overheated because of circuit, can not accomplish warning.
The utility model content
The purpose of the utility model is accurately to judge leakage current amplitude and phase place size, also can effectively protect electrical equipment in time to cut off power supply when leakage current is less, when fire takes place, can realize fire-fighting link.
For achieving the above object, the utility model comprises, zero sequence current mutual inductor, be used for detecting flow through instrument transformer three-phase electricity vector with whether be zero; Signal processing circuit is used for the amplification and the preliminary treatment of current signal; The A/D modular converter, being used for analog signal conversion is digital signal; Control module is used for the control of system signal processing and allomeric function; Multichannel is selected the action Executive Module, is used to accept the control module signal and drives corresponding function module realization function; The circuit temperature measurement module is used for the measurement of line temperature; The fire-fighting link module is used to provide fire protection warning and fire-fighting link; Keysheet module, it is preset to be used for equipment each item numerical value; The LCD display module is used to show current device running status and real time information.
When the electric leakage accident takes place; Send into the A/D modular converter after leakage current process zero sequence current mutual inductor that detects and the signal processing circuit processing and amplifying; Calculate through control module, if reach limit value, control module drives multichannel and selects action Executive Module control relay to accomplish the earth leakage protective device tripping operation; If do not reach limit value; The circuit temperature measurement module is measured line temperature through thermistor and infrared survey technology in real time; When temperature surpasses limit value; Control module drives multichannel and selects the action Executive Module to accomplish warning, and when fire detection module was found breaking out of fire, control module drove multichannel and selects action Executive Module cut-out general supply and carry out interlink warning through the fire-fighting link module; The whole mistake in the title can manually be imported limit value through Keysheet module, and shows current state in real time through the LCD display module.
The utility model advantage is accurately to judge leakage current amplitude and phase place size, real-time monitoring circuit temperature, and fire preventing is also carried out fire-fighting link, can make accurate processing to faulty circuit according to actual conditions.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model.
Embodiment
As shown in Figure 1, the utility model comprises, zero sequence current mutual inductor, be used for detecting flow through instrument transformer three-phase electricity vector with whether be zero; Signal processing circuit is used for the amplification and the preliminary treatment of current signal; The A/D modular converter, being used for analog signal conversion is digital signal; Control module is used for the control of system signal processing and allomeric function; Multichannel is selected the action Executive Module, is used to accept the control module signal and drives corresponding function module realization function; The circuit temperature measurement module is used for the measurement of line temperature; The fire-fighting link module is used to provide fire protection warning and fire-fighting link; Keysheet module, it is preset to be used for equipment each item numerical value; The LCD display module is used to show current device running status and real time information.
During the circuit operate as normal, the current phasor of the instrument transformer primary side of flowing through and be zero, then secondary side current also is zero.When leak current fault took place, the instrument transformer primary side current of flowing through was an amount of and non-vanishing, and this moment, electric current made secondary side current non-vanishing through the electromagnetic induction effect.Send into the A/D modular converter after leakage current process zero sequence current mutual inductor that detects and the signal processing circuit processing and amplifying; Calculate the amplitude and the phase place of leakage current through control module; If reach limit value, control module drives multichannel and selects action Executive Module control relay to accomplish the earth leakage protective device tripping operation; If do not reach limit value; For fear of possibility breaking out of fire in this case; The circuit temperature measurement module is measured line temperature through thermistor and infrared survey technology in real time, and when temperature surpassed limit value, control module drove multichannel and selects the completion of action Executive Module to report to the police; When fire detection module was found breaking out of fire, control module drove multichannel and selects action Executive Module cut-out general supply and carry out interlink warning through the fire-fighting link module; The whole mistake in the title can manually be imported limit value through Keysheet module, and shows current state in real time through the LCD display module.
Claims (3)
1. protective earthing system earth leakage protective device is characterized in that: this device comprises,
Zero sequence current mutual inductor, be used for detecting flow through instrument transformer three-phase electricity vector with whether be zero;
Signal processing circuit is used for the amplification and the preliminary treatment of current signal;
The A/D modular converter, being used for analog signal conversion is digital signal;
Control module is used for the control of system signal processing and allomeric function;
Multichannel is selected the action Executive Module, is used to accept the control module signal and drives corresponding function module realization function;
The circuit temperature measurement module is used for the measurement of line temperature;
The fire-fighting link module is used to provide fire protection warning and fire-fighting link;
Keysheet module, it is preset to be used for equipment each item numerical value;
The LCD display module is used to show current device running status and real time information.
2. according to the described protective earthing system earth leakage protective device of claim 1, it is characterized in that: said multichannel is selected the action Executive Module to drive earth leakage protective device, general supply or fire-fighting link module respectively according to unlike signal and is accomplished the protection action.
3. according to the described protective earthing system earth leakage protective device of claim 1, it is characterized in that: said circuit temperature measurement module adopts thermistor and infrared temperature-test technology that circuit is carried out real time temperature and measures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203993817U CN202333747U (en) | 2011-10-19 | 2011-10-19 | Electric leakage protection device of guard ground system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203993817U CN202333747U (en) | 2011-10-19 | 2011-10-19 | Electric leakage protection device of guard ground system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202333747U true CN202333747U (en) | 2012-07-11 |
Family
ID=46445713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203993817U Expired - Fee Related CN202333747U (en) | 2011-10-19 | 2011-10-19 | Electric leakage protection device of guard ground system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202333747U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683185A (en) * | 2012-09-24 | 2014-03-26 | 联想(北京)有限公司 | Electric leakage protection method, device and electronic device |
| CN105448117A (en) * | 2015-12-22 | 2016-03-30 | 青岛海信网络科技股份有限公司 | Signal machine and signal lamp link electric leakage detection method |
| CN107069660A (en) * | 2017-04-10 | 2017-08-18 | 浦北县金洋电厨具有限公司 | Detection and protection apparatus for leakage |
| CN111308187A (en) * | 2020-03-23 | 2020-06-19 | 国网山东省电力公司成武县供电公司 | Meter box protection device and remote monitoring platform |
-
2011
- 2011-10-19 CN CN2011203993817U patent/CN202333747U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683185A (en) * | 2012-09-24 | 2014-03-26 | 联想(北京)有限公司 | Electric leakage protection method, device and electronic device |
| CN103683185B (en) * | 2012-09-24 | 2017-11-03 | 联想(北京)有限公司 | A kind of earth leakage protecting method, device and electronic equipment |
| CN105448117A (en) * | 2015-12-22 | 2016-03-30 | 青岛海信网络科技股份有限公司 | Signal machine and signal lamp link electric leakage detection method |
| CN107069660A (en) * | 2017-04-10 | 2017-08-18 | 浦北县金洋电厨具有限公司 | Detection and protection apparatus for leakage |
| CN111308187A (en) * | 2020-03-23 | 2020-06-19 | 国网山东省电力公司成武县供电公司 | Meter box protection device and remote monitoring platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20121019 |