CN210867172U - Protection device with automatic monitoring current leakage function - Google Patents
Protection device with automatic monitoring current leakage function Download PDFInfo
- Publication number
- CN210867172U CN210867172U CN201921938436.XU CN201921938436U CN210867172U CN 210867172 U CN210867172 U CN 210867172U CN 201921938436 U CN201921938436 U CN 201921938436U CN 210867172 U CN210867172 U CN 210867172U
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- relay
- protection device
- current
- current sensor
- electrical equipment
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 11
- 230000005611 electricity Effects 0.000 claims abstract description 6
- 238000005485 electric heating Methods 0.000 abstract description 11
- 230000005856 abnormality Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of the electrical equipment protection device technique and specifically relates to a protection device with automatic monitoring current leakage function, including first relay, first relay electricity is connected with a plurality of electrical equipment, all set up an electric protection device between first relay and every electrical equipment, electric protection device includes second relay, current sensor, controller, first relay, second relay, current sensor, electrical equipment are established ties and are switched on, the controller is connected with second relay, current sensor electricity respectively. The device utilizes the characteristic that the leakage current of the electric heating tube is suddenly increased in the limit temperature state, judges that the electric heating tube is in the limit temperature state by detecting the abnormality of the leakage current, reduces the fault that the leakage current of the whole machine exceeds the standard to cause the disconnection of the main brake, effectively protects and prolongs the service life of the electric heating tube, and simultaneously does not need manual intervention operation to ensure that corresponding equipment automatically restores the working state.
Description
Technical Field
The utility model relates to an electrical equipment protection device technical field especially relates to a protection device with automatic monitoring current leakage function.
Background
The leakage current of the existing leakage protection switch of the user terminal is required to be less than 30 milliamperes by national standards, the leakage current is about 22 milliamperes when the leakage protection switch is actually used, the protection switch is easy to be in a disconnection state, when equipment is in an abnormal state, the leakage current is easy to exceed the standard, and as the leakage current of one piece of electric equipment exceeds the standard, a main brake is disconnected, other normal electric equipment cannot normally work.
For example, when an electric heating tube is in a limit temperature state for a long time, great damage can be caused to the electric heating tube, meanwhile, along with the increase of the temperature, the leakage current value in an electrified loop can also be increased rapidly, certain potential safety hazards are generated, and low-cost and long-term reliable temperature detection and control equipment is absent in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the exceeding of leakage current leads to the disconnection of a general brake when the electric heating pipe works in the extreme temperature state in the prior art, so that other normal electric equipment can not normally work, and the protection device with the function of automatically monitoring the current leakage is provided.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the design one kind has automatic protective device which monitors the current leakage function, including the first relay, the first relay electricity is connected with a plurality of electrical equipment, characterized in that, all set up an electric protective device between first relay and every electrical equipment, the electric protective device includes the second relay, current sensor, controller, first relay, second relay, current sensor, electrical equipment are established ties and are switched on, the controller is connected with second relay, current sensor electricity respectively.
Preferably, the current sensor is a CSM300LT series hall current sensor.
Preferably, the controller is a PIC series from Microchip, a Z86 series from Zilog, or an AT90S series from Atmel.
Preferably, the controller is electrically connected with a timer.
The utility model provides a pair of protection device with automatic monitoring current leakage function, beneficial effect lies in: this protection device applies to every individual equipment, is in abnormal state when equipment, and leakage current exceeds standard, only cuts off corresponding equipment, can not cause the main brake disconnection, also does not influence other normal consumer work, after the outage a period, when consumer converts normal state, need not artifical intervention operation, makes corresponding consumer automatic recovery operating condition.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: the relay comprises a first relay 1, a second relay 2, an electric device 3, a current sensor 4 and a controller 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1, a protection device with an automatic current leakage monitoring function includes a first relay 1, the first relay 1 is electrically connected with a plurality of electric devices 3, and is characterized in that an electric protection device is arranged between the first relay 1 and each electric device 3, the electric protection device includes a second relay 2, a current sensor 4 and a controller 5, the first relay 1, the second relay 2, the current sensor 4 and the electric devices 3 are connected in series and conducted, the controller 5 is respectively electrically connected with the second relay 2 and the current sensor 4, the current sensor 4 selects a CSM300LT series hall current sensor, because the control relationship of the device is relatively simple, a RISC type single chip microcomputer is selected, the controller 5 can adopt a PIC series of Microchip company, a Z86 series of Zilog or an AT90S series of Atmel, and the controller 5 is electrically connected with a timer.
The working principle is as follows: referring to FIG. 1, when the device is in a normal operating state, I1＝I2When the electric heating tube is in the limit temperature state, the leakage current will increase rapidly, I1＞I2I leak is equal to I1-I2The detected current leakage value is transmitted to the controller 5 through the current sensor 4, the current leakage value is compared with a current allowable leakage rated value through the controller 5, and if the current leakage value exceeds the rated value, the controller 5 transmits a signal to the second relay 2 to cut off the power for a period of time, such as 300 seconds, so that the power-off action of the electrical equipment 3 is completed; after 300 seconds, the temperature is reduced, the controller 5 controls the second relay 2 to be closed again, the electric device 3 is electrified again, and the current sensor 4 senses I again1、I2The digital difference is transmitted to the controller 5 and compared with the I rated value, the controller 5 is used for controlling whether the second relay 2 is still disconnected for 300 seconds to work, the operation is circulated, the characteristic that the leakage current of the electric heating tube is suddenly increased in the limit temperature state is utilized, the electric heating tube is judged to be in the limit temperature state by detecting the abnormality of the leakage current, the fault that the main brake is disconnected due to the fact that the leakage current of the whole electric heating tube exceeds the standard is reduced, and the service life of the electric heating tube is effectively protected and prolonged. When the power is off for a period of time, the temperature is reduced, manual intervention operation is not needed, and the corresponding equipment automatically restores to the working state.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model thereof, the technical solution, concept and design obtained by equivalent replacement or change should be covered within the protection scope of the present invention.
Claims (4)
1. The utility model provides a protection device with automatic monitoring current leakage function, includes first relay (1), first relay (1) electricity is connected with a plurality of electrical equipment (3), its characterized in that, all set up an electric protection device between first relay (1) and every electrical equipment (3), electric protection device includes second relay (2), current sensor (4), controller (5), first relay (1), second relay (2), current sensor (4), electrical equipment (3) are established ties and are switched on, controller (5) are connected with second relay (2), current sensor (4) electricity respectively.
2. A protection device with automatic current leakage monitoring function according to claim 1, characterized in that said current sensor (4) is a CSM300LT series hall current sensor.
3. A protection device with automatic current leakage monitoring function according to claim 1, characterized in that said controller (5) is of PIC series, Zilog Z86 series or Atmel AT90S series by Microchip.
4. A protection device with automatic current leakage monitoring function according to claim 1, characterized in that the controller (5) is electrically connected with a timer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921938436.XU CN210867172U (en) | 2019-11-09 | 2019-11-09 | Protection device with automatic monitoring current leakage function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921938436.XU CN210867172U (en) | 2019-11-09 | 2019-11-09 | Protection device with automatic monitoring current leakage function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210867172U true CN210867172U (en) | 2020-06-26 |
Family
ID=71290972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921938436.XU Expired - Fee Related CN210867172U (en) | 2019-11-09 | 2019-11-09 | Protection device with automatic monitoring current leakage function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210867172U (en) |
-
2019
- 2019-11-09 CN CN201921938436.XU patent/CN210867172U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200626 |