CN205195242U - Secondary overvoltage protection device of current transformer - Google Patents
Secondary overvoltage protection device of current transformer Download PDFInfo
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- CN205195242U CN205195242U CN201521053987.XU CN201521053987U CN205195242U CN 205195242 U CN205195242 U CN 205195242U CN 201521053987 U CN201521053987 U CN 201521053987U CN 205195242 U CN205195242 U CN 205195242U
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Abstract
The utility model discloses a secondary overvoltage protection device of current transformer, including the protector main part, inside ARM system and the MCU system of being equipped with of protector main part, the MCU system includes MCU host system and the voltage sensor, current sensor, acousto -optic warning module A, the storage module A that are connected with MCU host system electricity respectively, the ARM system includes ARM host system and the infrared ray temperature sensor, humidity transducer, dust sensor, wireless communication module, acousto -optic warning module B, the storage module B that are connected with ARM host system electricity respectively, the MCU system passes through RS232 communication module and ARM system electric connection. This device adopts the MCU+ARM isolating construction, and the MCU system accomplishes the high -pressure protection task to current transformer secondary winding, and the ARM system accomplishes protector inside environmental monitoring and is responsible for man -machinely and the communication management. The protection is relatively independent, safer, reliable and stable with the control.
Description
Technical field
The utility model relates to power system device field, in particular a kind of intelligent Current Transformer Secondary overvoltage protection device.
Background technology
In electric power system, current transformer is small area analysis big current being become regulation, is widely used in one-shot measurement, control and protection.It is the requisite kit of ammeter, kilowatt-hour meter and current control system.When current transformer normally works, secondary side is near short circuit state, output voltage is very low, if but the secondary winding open circuit that is in operation, or a winding flows through abnormal current, as lightning current, resonance overcurrent, capacitance charging current, inductance starting current, a load short circuit current etc., the overvoltage of thousands of volt volt even up to ten thousand will be produced at secondary side, this not only works the mischief to electrical secondary system insulation, current transformer also can be made too drastic and scaling loss, even jeopardize the life security of staff.Therefore need in electric power system to adopt Current Transformer Secondary overvoltage protection device to prevent the superpotential generation of current transformer.Current Transformer Secondary overvoltage protection device is due to its important job specification; certain technical indicator is had to inner circuit modular structure and internal environment; resistance, protective current, the voltage of such as leakage current, piezo-resistance; the temperature of operational environment, humidity and internal dust concentration etc.; existing Current Transformer Secondary overvoltage protection device structure is single, does not have clear and definite independently internal protection circuitry modular system or other monitoring structure systems.
In addition, the Current Transformer Secondary overvoltage protection device of existing use also just offers louvre for enclosure interior over-heat inside, measure that moist situation is taked on shell, and such mode is single, effect is thorough not.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art; provide a kind of intelligent Current Transformer Secondary overvoltage protection device; this device adopts MCU+ARM isolating construction; strong and weak electricity separates completely; MCU system completes the high voltage protective task to secondary winding in current transformer, and ARM system completes the monitoring of protector internal environment and is responsible for man-machine and communication management.Protect and monitor relatively independent, safer, reliable and stable.
The utility model have employed following technical scheme: a kind of Current Transformer Secondary overvoltage protection device, comprise protector main body, described protector body interior is provided with ARM system and MCU system, described MCU system comprises MCU main control module, voltage sensor, current sensor, sound and light alarm modules A and memory module A, and described MCU main control module is electrically connected with voltage sensor, current sensor, sound and light alarm modules A, memory module A respectively; Described ARM system comprises ARM main control module, infrared temperature sensor, humidity sensor, dust sensor, wireless communication module, sound and light alarm module B and memory module B, described ARM main control module is electrically connected with infrared temperature sensor, humidity sensor, dust sensor, wireless communication module, sound and light alarm module B and memory module B respectively, and described MCU system is electrically connected with ARM system by RS232 communication module.
The cover top portion of described protector main body is provided with LCDs and keyboard, and described LCDs is electrically connected with MCU main control module, ARM main control module respectively, and described keyboard is electrically connected with MCU main control module, ARM main control module respectively.Keyboard real-time operation can control in ARM system and MCU system modular structure, and LCDs shows protector internal circuit status and environment in real time, shows the circuit monitoring be stored in memory module A and memory module B and environmental monitoring data in real time.
Containing conducting particles in dust, excessive concentration, can corrode wire and circuit board, affect circuit working.Dust sensor, also known as optical air mass transducer, utilizes optical principle, can detect the powder dust particle of more than micron, and Real-time Obtaining protector internal dust concentration levels, accomplishes timely cleaning.
Preferably, the shell of protector main body is provided with and is no less than two light-emitting diodes, described sound and light alarm modules A is electrically connected with light-emitting diode.
Preferably, described sound and light alarm module B is electrically connected with light-emitting diode.In addition, sound and light alarm module also comprises loud speaker, can audio alert.
Preferably, the side wall of outer shell of described protector main body is provided with some fans, and described fan is electrically connected with ARM main control module, and on the basis of louvre, better dispel the heat hydrofuge.
Preferably, described wireless communication module can long-rangely be connected with communication of mobile terminal.Mobile terminal by wireless communication module, long-range Real-time Obtaining protector internal state, the circuit monitoring of downloaded stored in memory module A and memory module B and environmental monitoring data, and Control protection device interior section structure in real time.
Preferably, in described MCU system, there is piezo-resistance, described piezo-resistance and the electrical connection of MCU main control module.Piezo-resistance is the primary element of protector, and it is parallel to the protected winding two ends of Current Transformer Secondary, and during normal operation, the voltage at piezo-resistance two ends is less than 20V.Now piezo-resistance is in the high-impedance state of approximate open circuit, is called leakage current, is less than 1mA by its electric current, negligible on the impact of this loop protection operating value and table meter accuracy; When there is abnormal overcurrent in secondary circuit open circuit or a winding, the voltage produced in secondary winding far away higher than normal operating voltage, now and the piezo-resistance connect enters conducting state instantaneously.Due to the inherent characteristic of piezo-resistance, overvoltage is effectively limited below set point value, enters stable short-circuit condition, thus thoroughly avoids overvoltage injury.In MCU system except piezo-resistance, also in conjunction with other modular structure, better play a protective role.
Compared with prior art, the beneficial effects of the utility model:
1, intelligent Current Transformer Secondary overvoltage protection device, this device adopts MCU+ARM isolating construction, strong and weak electricity separates completely, and (MCU system is forceful electric power structure, ARM system adopts light current structure), dispersion can be realized and install, without any need for outside anti-interference device; And MCU system and ARM system non-fully separate, each other by RS232 communication module communication transmission of signal;
2, MCU system completes the high voltage protective task to secondary winding in current transformer, and ARM system completes the monitoring of protector internal environment and is responsible for man-machine and communication management.Protect and monitor relatively independent, safer, reliable and stable;
All include various Sensor monitoring structure in 3, MCU system and ARM system, monitor the acousto-optic alarm structure after abnormal data, and the memory module configuration to operational data, structure function is comprehensive;
4, the operation control mode of protector and data acquiring mode have two kinds, and in-local and remote mobile terminal radio communication obtain.
Accompanying drawing explanation
Fig. 1 is principle schematic of the present utility model;
Fig. 2 is perspective view of the present utility model.
Wherein: 1, protector main body; 2, ARM system; 3, MCU system; 4, LCDs; 5, keyboard; 6, RS232 communication module; 7, fan; 8, light-emitting diode.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.
In Fig. 1, Fig. 2, a kind of Current Transformer Secondary overvoltage protection device, comprise protector main body 1, described protector main body 1 inside is provided with ARM system 2 and MCU system 3, described MCU system 3 comprises MCU main control module, voltage sensor, current sensor, sound and light alarm modules A and memory module A, and described MCU main control module is electrically connected with voltage sensor, current sensor, sound and light alarm modules A, memory module A respectively; Described ARM system 2 comprises ARM main control module, infrared temperature sensor, humidity sensor, dust sensor, wireless communication module, sound and light alarm module B and memory module B, described ARM main control module is electrically connected with infrared temperature sensor, humidity sensor, dust sensor, wireless communication module, sound and light alarm module B and memory module B respectively, and described MCU system 3 is electrically connected with ARM system 2 by RS232 communication module 6.
The cover top portion of described protector main body 1 is provided with LCDs 4 and keyboard 5, and described LCDs 4 is electrically connected with MCU main control module, ARM main control module respectively, and described keyboard 5 is electrically connected with MCU main control module, ARM main control module respectively.Keyboard 5 real-time operation can control in ARM system 2 and MCU system 3 modular structure, and LCDs 4 is display protector internal circuit status and environment in real time, shows the circuit monitoring be stored in memory module A and memory module B and environmental monitoring data in real time.
The shell of protector main body 1 is provided with eight light-emitting diodes 8, described sound and light alarm modules A and acousto-optic alarm module B are electrically connected with corresponding light-emitting diode 8 respectively.In addition, sound and light alarm module also comprises loud speaker, can audio alert.
Described protector main body cover two side is symmetrically installed with four fans 7 respectively, and described fan 7 is electrically connected with ARM main control module.On the basis of louvre, better dispel the heat hydrofuge.
Described wireless communication module can long-rangely be connected with communication of mobile terminal.Mobile terminal by wireless communication module, long-range Real-time Obtaining protector internal state, the circuit monitoring of downloaded stored in memory module A and memory module B and environmental monitoring data, and Control protection device interior section structure in real time.
Piezo-resistance is had, described piezo-resistance and the electrical connection of MCU main control module in described MCU system.In MCU system except piezo-resistance, also in conjunction with other modular structure, better play a protective role.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (6)
1. Current Transformer Secondary overvoltage protection device, comprise protector main body (1), it is characterized in that: described protector main body (1) inside is provided with ARM system (2) and MCU system (3), described MCU system (3) comprises MCU main control module, voltage sensor, current sensor, sound and light alarm modules A and memory module A, and described MCU main control module is electrically connected with voltage sensor, current sensor, sound and light alarm modules A, memory module A respectively; Described ARM system (2) comprises ARM main control module, infrared temperature sensor, humidity sensor, dust sensor, wireless communication module, sound and light alarm module B and memory module B, described ARM main control module is electrically connected with infrared temperature sensor, humidity sensor, dust sensor, wireless communication module, sound and light alarm module B and memory module B respectively, and described MCU system (3) is electrically connected with ARM system (2) by RS232 communication module (6);
The cover top portion of described protector main body (1) is provided with LCDs (4) and keyboard (5); described LCDs (4) is electrically connected with MCU main control module, ARM main control module respectively, and described keyboard (5) is electrically connected with MCU main control module, ARM main control module respectively.
2. Current Transformer Secondary overvoltage protection device according to claim 1; it is characterized in that: the shell of described protector main body (1) is provided with and is no less than two light-emitting diodes (8), described sound and light alarm modules A is electrically connected with light-emitting diode (8).
3. Current Transformer Secondary overvoltage protection device according to claim 1 and 2, is characterized in that: described sound and light alarm module B is electrically connected with light-emitting diode (8).
4. Current Transformer Secondary overvoltage protection device according to claim 1; it is characterized in that: the side wall of outer shell of described protector main body (1) is provided with some fans (7), and described fan (7) is electrically connected with ARM main control module.
5. Current Transformer Secondary overvoltage protection device according to claim 1, is characterized in that: described wireless communication module can long-rangely be connected with communication of mobile terminal.
6. Current Transformer Secondary overvoltage protection device according to claim 1, is characterized in that: have piezo-resistance in described MCU system (3), described piezo-resistance and the electrical connection of MCU main control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521053987.XU CN205195242U (en) | 2015-12-17 | 2015-12-17 | Secondary overvoltage protection device of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521053987.XU CN205195242U (en) | 2015-12-17 | 2015-12-17 | Secondary overvoltage protection device of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205195242U true CN205195242U (en) | 2016-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521053987.XU Expired - Fee Related CN205195242U (en) | 2015-12-17 | 2015-12-17 | Secondary overvoltage protection device of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205195242U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953311A (en) * | 2017-04-29 | 2017-07-14 | 国网江苏省电力公司职业技能训练基地 | A kind of Current Transformer Secondary overvoltage protection device |
-
2015
- 2015-12-17 CN CN201521053987.XU patent/CN205195242U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953311A (en) * | 2017-04-29 | 2017-07-14 | 国网江苏省电力公司职业技能训练基地 | A kind of Current Transformer Secondary overvoltage protection device |
| CN106953311B (en) * | 2017-04-29 | 2019-04-19 | 国网江苏省电力公司职业技能训练基地 | A kind of Current Transformer Secondary over-voltage 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 |
Granted publication date: 20160427 Termination date: 20161217 |
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| CF01 | Termination of patent right due to non-payment of annual fee |