CN214755488U - Leakage protection device based on leakage voltage detection - Google Patents
Leakage protection device based on leakage voltage detection Download PDFInfo
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- CN214755488U CN214755488U CN202022881154.XU CN202022881154U CN214755488U CN 214755488 U CN214755488 U CN 214755488U CN 202022881154 U CN202022881154 U CN 202022881154U CN 214755488 U CN214755488 U CN 214755488U
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Abstract
The utility model provides an electric leakage protection device based on leakage voltage detection, which comprises a power supply unit, a main measuring voltmeter, a standby measuring voltmeter, a control processing unit, an output relay, an alarm unit and a communication unit; the leakage protection device adopts the main measurement voltmeter and the standby measurement voltmeter to directly acquire leakage voltage signals, can accurately detect the leakage condition of protected equipment in real time, sends out an alarm in time, cuts off a power supply, and uploads the fault condition to a remote monitoring center through the communication unit. The utility model provides a leakage protection device based on leakage voltage detects can accurately detect leakage information and cut off power supply, guarantees power equipment's security and reliability.
Description
Technical Field
The utility model belongs to the technical field of the electric power detects, in particular to earth leakage protection device based on leakage voltage detects.
Background
When the electrical equipment runs, the electric appliance shell which is not electrified is electrified due to insulation aging, heating abrasion, dampness and the like, namely, the electric leakage is caused. The leakage is a fault which endangers personal safety and increases useless electric energy loss, the traditional prevention method is to additionally install a leakage protector, but the traditional leakage protector detects the leakage by using a leakage current measuring mode, and the mode has the premise that effective current must be formed between a leaked shell or an insulating skin and the ground or a low-potential object to enable a leakage protection electromagnetic coil to act and cut off a circuit. That is to say, if the device housing is grounded poorly or even if the housing is not grounded, when a human body touches the charged housing, the human body must pass through the housing and generate a current to cause a protective action, which in fact does not completely eliminate the possibility of personal injury. In fact, in many places, the ground wire cannot necessarily meet the standard due to geographical conditions and environment, and the measurement of the ground connection cannot be detected in real time, which certainly cannot ensure the continuity and integrity of the ground connection.
The utility model provides a leakage protection device based on leakage voltage detects directly gathers leakage voltage, need not to go into the return circuit and just can enable leakage protection's solenoid action and cutoff circuit at the shell that voltage was revealed or insulating skin and earth or low potential object, guarantees the safety of the person and equipment.
SUMMERY OF THE UTILITY MODEL
The utility model provides a leakage protection device based on leakage voltage detects can accurately detect leakage information and cut off power supply, guarantees power equipment's security and reliability.
The utility model particularly relates to an electric leakage protection device based on leakage voltage detects, electric leakage protection device includes power supply unit, main measurement voltmeter, is equipped with and measures voltmeter, control processing unit, output relay, alarm unit and communication unit, power supply unit respectively with main measurement voltmeter, be equipped with and measure the voltmeter, control processing unit, output relay, alarm unit, communication unit is connected, control processing unit still respectively with main measurement voltmeter, be equipped with and measure the voltmeter, output relay, communication unit is connected, output relay still with alarm unit is connected; the leakage protection device adopts the main measurement voltmeter and the standby measurement voltmeter to directly acquire leakage voltage signals, can accurately detect the leakage condition of protected equipment in real time, sends out an alarm in time, cuts off a power supply, and uploads the fault condition to a remote monitoring center through the communication unit.
The power supply unit is independent of the protected equipment, comprises a circuit breaker, a fuse type fuse and a transformer, converts an input 380V input power supply into a low-voltage 220V power supply, and supplies power to the main measurement voltmeter, the standby measurement voltmeter, the control processing unit, the output relay, the alarm unit and the communication unit; the circuit breaker adopts a two-phase industrial-grade miniature circuit breaker.
The main measurement voltmeter and the measurement terminals of the standby measurement voltmeter are led to the wiring terminals to be used for measuring and monitoring the voltage between the shell of the protected electric appliance and the ground, the main measurement voltmeter and the standby measurement voltmeter are mutually standby, and when one voltmeter breaks down, the other voltmeter can still normally play a role in protection.
The alarm output terminals of the main measurement voltmeter and the standby measurement voltmeter are connected in parallel and then connected onto the output relay coil, a group of normally closed contacts are provided for protected equipment, and a group of normally open contacts are provided for the alarm unit.
The output relay is provided with a test button SB1 and an alarm reset button SB2, the test button SB1 is pressed, the output relay is forced to be output and is used for testing the action of cutting off a power supply and whether the alarm unit is intact, the output relay keeps a suction state when an alarm is generated, and the alarm unit can be reset by pressing the alarm reset button SB2 after the fault is relieved.
And the control processing unit adopts a microprocessor to carry out information analysis and integral control on the leakage protection device.
The alarm unit adopts an audible and visual alarm, and when the protected equipment has leakage voltage and is greater than the reference value of the leakage voltage, the audible and visual alarm is timely sent out.
The communication unit adopts GPRS wireless communication technology will earth leakage protection device work information uploads to remote monitoring center can receive remote control instruction simultaneously.
Compared with the prior art, the beneficial effects are: the leakage protection device directly collects leakage voltage, two voltmeters are adopted for protection and standby, and a shell or an insulating skin with voltage leakage and the ground or a low-potential object do not need to form a loop to enable an electromagnetic coil of the leakage protection to act and cut off a circuit, so that the safety of people and equipment is ensured.
Drawings
Fig. 1 is the utility model relates to a leakage protection device's schematic structure based on leakage voltage detects.
Detailed Description
The following describes in detail a specific embodiment of the leakage protection device based on leakage voltage detection according to the present invention with reference to the accompanying drawings.
As shown in fig. 1, the leakage protection device of the present invention comprises a power supply unit, a main measurement voltmeter, a standby measurement voltmeter, a control processing unit, an output relay, an alarm unit and a communication unit, wherein the power supply unit is respectively connected with the main measurement voltmeter, the standby measurement voltmeter, the control processing unit, the output relay, the alarm unit and the communication unit, the control processing unit is further respectively connected with the main measurement voltmeter, the standby measurement voltmeter, the output relay and the communication unit, and the output relay is further connected with the alarm unit; the leakage protection device adopts the main measurement voltmeter and the standby measurement voltmeter to directly acquire leakage voltage signals, can accurately detect the leakage condition of protected equipment in real time, sends out an alarm in time, cuts off a power supply, and uploads the fault condition to a remote monitoring center through the communication unit.
The power supply unit comprises a circuit breaker, a fuse-type fuse and a transformer, converts an input 380V input power into a low-voltage 220V power supply, and supplies power to the main measurement voltmeter, the standby measurement voltmeter, the control processing unit, the output relay, the alarm unit and the communication unit; the circuit breaker adopts a two-phase industrial-grade miniature circuit breaker; the power supply unit is independent of the protected device, so as to prevent the power supply of the protected circuit from being cut off together with the protection device.
The main measurement voltmeter and the measurement terminal of the standby measurement voltmeter are led to the wiring terminal to be used for measuring and monitoring the voltage between the shell of the protected electric appliance and the ground, the main measurement voltmeter and the standby measurement voltmeter are mutually standby, damage of one voltmeter is prevented, and when one voltmeter breaks down, the other voltmeter can still normally play a role in protection.
The alarm output terminals of the main measurement voltmeter and the standby measurement voltmeter are connected in parallel and then connected onto the output relay coil, a group of normally closed contacts are provided for protected equipment, and a group of normally open contacts are provided for the alarm unit.
The output relay is provided with a test button SB1 and an alarm reset button SB2, the test button SB1 is pressed, the output relay is forced to be output and is used for testing the action of cutting off a power supply and whether the alarm unit is intact, the output relay keeps a suction state when an alarm is generated, and the alarm unit can be reset by pressing the alarm reset button SB2 after the fault is relieved.
The control processing unit adopts a microprocessor to carry out information analysis and integral control on the electric leakage protection device, when a main measurement voltmeter or a voltage signal acquired by the standby measurement voltmeter is greater than a reference value, the output relay is controlled to be closed, the output relay acts to be disconnected, the power supply of the protected equipment is sent out, and the alarm unit sends out an alarm and transmits the communication voltage to the remote monitoring center in time.
The alarm unit adopts an audible and visual alarm; the communication unit adopts GPRS wireless communication technology will earth leakage protection device work information uploads to remote monitoring center can receive remote control instruction simultaneously.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit the same. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. An electric leakage protection device based on electric leakage voltage detection is characterized by comprising a power supply unit, a main measurement voltmeter, a standby measurement voltmeter, a control processing unit, an output relay, an alarm unit and a communication unit, wherein the power supply unit is respectively connected with the main measurement voltmeter, the standby measurement voltmeter, the control processing unit, the output relay, the alarm unit and the communication unit; the leakage protection device adopts the main measurement voltmeter and the standby measurement voltmeter to directly acquire leakage voltage signals, can accurately detect the leakage condition of protected equipment in real time, sends out an alarm in time, cuts off a power supply, and uploads the fault condition to a remote monitoring center through the communication unit.
2. A leakage protection device based on detection of leakage voltage as claimed in claim 1, wherein said power supply unit is independent from said protected device, and comprises a circuit breaker, a fuse, and a transformer, and converts an input 380V input power into a low-voltage 220V power supply to supply power to said main measurement voltmeter, said standby measurement voltmeter, said control processing unit, said output relay, said alarm unit, and said communication unit; the circuit breaker adopts a two-phase industrial-grade miniature circuit breaker.
3. A leakage protection device based on detection of leakage voltage as claimed in claim 2, wherein the measurement terminals of the main measurement voltmeter and the standby measurement voltmeter are led to the connection terminal for measuring and monitoring the voltage between the casing of the protected electrical apparatus and the ground, and are mutually standby, and when one voltmeter fails, the other voltmeter can still normally perform the protection function.
4. A leakage protection device according to claim 3, wherein the alarm output terminals of the main and standby voltage meters are connected in parallel and then connected to the output relay coil, and a set of normally closed contacts is provided for the protected device, and a set of normally open contacts is provided for the alarm unit.
5. A leakage protection device according to claim 4, wherein the output relay is provided with a test button SB1 and a alarm reset button SB2, the test button SB1 is pressed to force the output relay to test the power cut-off and the alarm unit is intact, the output relay will maintain the pull-in state when the alarm is generated, and the alarm reset button SB2 is pressed to reset the alarm unit when the fault is removed.
6. An earth leakage protection device based on earth leakage voltage detection as claimed in claim 5, wherein said control processing unit uses microprocessor to perform information analysis and overall control on said earth leakage protection device.
7. An earth leakage protection device based on earth leakage voltage detection as claimed in claim 6, characterized in that said alarm unit is an audible and visual alarm, and when the earth leakage voltage of said protected device is greater than the earth leakage voltage reference value, an audible and visual alarm is given out in time.
8. An earth leakage protection device based on detection of leakage voltage as claimed in claim 7, wherein said communication unit employs GPRS wireless communication technology to upload the operation information of said earth leakage protection device to said remote monitoring center, and meanwhile can receive remote control command.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022881154.XU CN214755488U (en) | 2020-12-04 | 2020-12-04 | Leakage protection device based on leakage voltage detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022881154.XU CN214755488U (en) | 2020-12-04 | 2020-12-04 | Leakage protection device based on leakage voltage detection |
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| Publication Number | Publication Date |
|---|---|
| CN214755488U true CN214755488U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022881154.XU Active CN214755488U (en) | 2020-12-04 | 2020-12-04 | Leakage protection device based on leakage voltage detection |
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|---|---|
| CN (1) | CN214755488U (en) |
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- 2020-12-04 CN CN202022881154.XU patent/CN214755488U/en active Active
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