CN218449469U - Low-voltage power supply protection device with anti-interference function - Google Patents
Low-voltage power supply protection device with anti-interference function Download PDFInfo
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- CN218449469U CN218449469U CN202221712257.6U CN202221712257U CN218449469U CN 218449469 U CN218449469 U CN 218449469U CN 202221712257 U CN202221712257 U CN 202221712257U CN 218449469 U CN218449469 U CN 218449469U
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Abstract
The utility model provides a low-voltage power protection device of anti-electricity of shaking in area, power protection device is equipped with power detection controller in including, is equipped with fairing and drive control device in the power detection controller, and three-phase alternating current power supply and current detection cable are connected with the input electricity of power detection controller, and power detection controller detects three-phase alternating current power supply in order to judge whether take place to shake the electricity phenomenon to detect three-phase alternating current power supply current load. The power supply detection controller is used for sampling the time domain of the segmented voltage of the three-phase alternating-current power supply, judging whether the instantaneous drop phenomenon occurs or not and whether the range reaches the 'electricity interference' state or not, the 'electricity interference' phenomenon is enabled to be minimized on the output single-phase alternating-current power supply and the output single-phase direct-current power supply through the isolation of the rectifying device and the inverter, meanwhile, whether the phenomena of short circuit, overload and the like occur or not is judged through the time domain sampling of the current detection cable, and the power output is subjected to power-off protection through the drive control device.
Description
Technical Field
The utility model relates to an electrical protection device technical field, especially a low voltage power supply protection device of anti-electricity-dazzling function in area.
Background
Along with the increasing rapidness of chemical engineering heat tide, various designed production devices are increasingly huge, power supply and utilization load devices are also increasingly more, the power supply range is also increasingly wider, especially the safety protection problem of power supply and utilization equipment is particularly prominent, the power distribution system is often influenced by factors inside and outside the power system, the phenomenon of electricity interference can often occur, the interruption of the production devices can be generally caused, the protection device is also required to be increasingly reliable and perfect along with the application of a new technology and a new process, in order to ensure the normal work and personal safety of the electrical equipment and avoid personal injury and serious economic loss, the protection function of electricity interference is solved for a low-voltage protection controller, the protection device is increasingly important, but the current protection device is either aiming at the protection of motor overload, short circuit and the like, or lightning protection, and the protection of the phenomenon of electricity interference is rarely integrated.
Disclosure of Invention
The utility model aims to solve the technical problem that a low voltage power supply protection device of anti-electricity-dazzling function in area is provided, ensures the validity of safety in production and production, to all protection design one kind shake electric monitoring and control application system.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
the utility model provides a low-voltage power protection device of anti-electricity-dazzling function in area, be equipped with the power detection controller in the power protection device, be equipped with fairing and drive control device in the power detection controller, three-phase alternating current power and current detection cable are connected with the input electricity of power detection controller, power detection controller detects three-phase alternating current power in order to judge whether take place the electricity dazzling phenomenon, and detect three-phase alternating current power supply current load, three-phase alternating current power passes through fairing and sends single-phase direct current to dc-to-ac converter after drive control device carries out power supply control, single phase alternating current power after the protection is supplied with by the dc-to-ac converter output, single phase direct current power is drawn forth to the input of dc-to-ac converter.
The structure of the power supply detection controller is as follows:
the current detection cable is electrically connected with the input end of the first photoelectric coupling sampler, the three-phase alternating current power supply is electrically connected with the second photoelectric coupling sampler, the output ends of the first photoelectric coupling sampler and the second photoelectric coupling sampler are electrically connected with the input end of the controller, the output end of the controller is electrically connected with the drive control device, and the control device is internally provided with a contactor for controlling the on-off of the output end of the rectifying device.
The input end of the power supply protection device is electrically connected with the independent single-phase direct-current input power supply, and the independent single-phase direct-current input power supply is electrically connected with the output end of the rectifying device and the drive control device.
The output end of the power supply detection controller is electrically connected with the starting button, the stopping button and the auxiliary normally open switch, and the auxiliary normally open switch synchronously acts with the contactor in the drive control device.
The contactor of the drive control device is connected with the trip signal and acts synchronously, and the power supply protection device is provided with a serial communication interface and a network port.
The controller is electrically connected with the network port alarm output end.
The utility model provides a pair of low voltage power supply protection device of anti-electricity-dazzling function in area, carry out the segmentation voltage time domain sampling to three-phase AC power supply through the power detection controller, and judge whether take place instantaneous drop phenomenon and scope and whether reach "shake the electricity" state, the isolation through fairing and dc-to-ac converter makes "shake the electricity" phenomenon reduce to minimum to the single phase AC power supply and the single phase DC power supply influence of output, judge whether there is the short circuit through the time domain sampling to the current detection cable simultaneously, phenomenons such as overload take place, carry out power-off protection to power output through drive control device.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic structural view of the cone crusher of the present invention;
FIG. 2 is a block diagram of a power-on/power-off logic control structure of the power detection controller;
FIG. 3 is a diagram of single-phase voltage sampling analysis.
In the figure: the device comprises a power supply protection device 1, a power supply detection controller 2, a three-phase alternating current power supply 3, a current detection cable 4, a rectifying device 5, a drive control device 6, an inverter 7, a single-phase alternating current power supply 8, a single-phase direct current power supply 9, an independent single-phase direct current input power supply 10, a start key 11, a stop key 12, an auxiliary normally open switch 13, a trip signal 14, a serial communication interface 15, a network port 16, a controller 21, a first photoelectric coupling sampler 22, a second photoelectric coupling sampler 23 and a network port alarm output end 24.
Detailed Description
As shown in fig. 1-3, a low-voltage power protection device with anti-interference function is provided, a power detection controller 2 is provided in a power protection device 1, a rectifying device 5 and a driving control device 6 are provided in the power detection controller 2, a three-phase ac power supply 3 and a current detection cable 4 are electrically connected to an input terminal of the power detection controller 2, the power detection controller 2 detects the three-phase ac power supply 3 to determine whether interference occurs and detects a current load of the three-phase ac power supply 3, the three-phase ac power supply 3 supplies power to an inverter 7 through the rectifying device 5 and the driving control device 6, and then supplies a single-phase dc power to the inverter 7, the protected single-phase ac power supply 8 is supplied from an output terminal of the inverter 7, and the single-phase dc power supply 9 is led out from an input terminal of the inverter 7.
The three-phase alternating current power supply 3 is subjected to segmented voltage time domain sampling through the power supply detection controller 2, whether an instantaneous drop phenomenon occurs or not and whether the range reaches a 'power-shaking' state or not is judged, the influence of the 'power-shaking' phenomenon on the output single-phase alternating current power supply 8 and the output single-phase direct current power supply 9 is reduced to the minimum through the isolation of the rectifying device 5 and the inverter 7, meanwhile, whether short circuit, overload and other phenomena occur or not is judged through the time domain sampling of the current detection cable 4, and power supply output is subjected to power-off protection through the driving control device 6.
The structure of the power detection controller 2 is as follows:
the current detection cable 4 is electrically connected with the input end of the first photoelectric coupling sampler 22, the three-phase alternating-current power supply 3 is electrically connected with the second photoelectric coupling sampler 23, the output ends of the first photoelectric coupling sampler 22 and the second photoelectric coupling sampler 23 are electrically connected with the input end of the controller 21, the output end of the controller 21 is electrically connected with the drive control device 6, and a contactor is arranged in the control device 6 to control the on-off of the output end of the rectifying device 5.
The three-phase ac power supply 3 and the current detection cable 4 are detected by photoelectric coupling sampling, and as shown in fig. 3, the three-phase voltage waveform is analyzed for a unit time Δ t = t for the three-phase ac power supply 3 2 - t 1 Inner calculated voltage Δ u = u 2 - u 1 The depression change storage trend analysis judges whether the electricity interference phenomenon occurs, the current detection cable 4 detects whether the electric danger phenomena such as short circuit, overload and electric leakage occur to the A/C phase current, and the controller 21 controls the driving control device 6 so as to protect the safety of the load.
The input end of the power protection device 1 is electrically connected with an independent single-phase direct current input power supply 10, and the independent single-phase direct current input power supply 10 is electrically connected with the output end of the rectifying device 5 and the driving control device 6.
The access of the independent single-phase direct current input power supply 10 ensures that the protector has reliable guarantee of double power supplies, and can compensate voltage sag within about 100ms of the 'power interference' phenomenon through the electric quantity stored in the standby energy storage capacitor when the three-phase power supply is subjected to power interference, so that the effect of anti-power interference is achieved.
The output end of the power supply detection controller 2 is electrically connected with the start key 11, the stop key 12 and the auxiliary normally open switch 13, and the auxiliary normally open switch 13 and the contact in the drive control device 6 synchronously act.
Through start button 11 and stop button 12, operating personnel can artifically start and stop the operation to power protection device 1, and power detection controller 2 can judge current protection state through supplementary normally open switch 13, is in closing a floodgate or separating brake state.
The contactor of the drive control device 6 is connected with the trip signal 14 and acts synchronously, and the power protection device 1 is provided with a serial communication interface 15 and a network port 16.
The trip signal 14, the serial communication interface 15 and the network port 16 can be remotely connected with a monitoring device to realize the monitoring of the power protection device 1 and the power state.
The controller 21 is electrically connected with the network port alarm output end 24.
The network port alarm output end 24 can analyze and judge the current power state of the output end signals of the first photoelectric coupling sampler 22 and the second photoelectric coupling sampler 23 by the controller 21, and output an alarm signal by combining the current protection action execution condition, and can send an alarm to a remote end.
Claims (6)
1. The utility model provides a low voltage power supply protection device of anti-electricity of shaking in area, characterized by: be equipped with power detection controller (2) in power protection device (1), be equipped with rectifier unit (5) and drive control device (6) in power detection controller (2), three-phase alternating current power supply (3) and current detection cable (4) are connected with the input electricity of power detection controller (2), power detection controller (2) detect three-phase alternating current power supply (3) in order to judge whether take place to shake the electricity phenomenon, and detect three-phase alternating current power supply (3) current load, three-phase alternating current power supply (3) pass through rectifier unit (5) and carry out power supply control back single-phase direct current to inverter (7) via drive control device (6), supply single-phase alternating current power supply (8) after the protection by inverter (7) output, single-phase direct current power supply (9) are drawn forth to the input of inverter (7).
2. The low-voltage power supply protection device with the anti-interference function according to claim 1, wherein the power supply detection controller (2) has the following structure:
the current detection cable (4) is electrically connected with the input end of the first photoelectric coupling sampler (22), the three-phase alternating current power supply (3) is electrically connected with the second photoelectric coupling sampler (23), the output ends of the first photoelectric coupling sampler (22) and the second photoelectric coupling sampler (23) are electrically connected with the input end of the controller (21), the output end of the controller (21) is electrically connected with the drive control device (6), and a contactor is arranged in the control device (6) and is used for controlling the on-off of the output end of the rectifying device (5).
3. The low-voltage power supply protection device with the anti-interference function according to claim 2, wherein the input end of the power supply protection device (1) is electrically connected with an independent single-phase direct-current input power supply (10), and the independent single-phase direct-current input power supply (10) is electrically connected with the output end of the rectifying device (5) and the driving control device (6).
4. The low-voltage power supply protection device with the anti-interference function according to claim 3, wherein the output end of the power supply detection controller (2) is electrically connected with the start button (11), the stop button (12) and the auxiliary normally open switch (13), and the auxiliary normally open switch (13) and the contact in the drive control device (6) act synchronously.
5. The low-voltage power supply protection device with the anti-interference function according to claim 4, wherein a contactor of the driving control device (6) is connected with a trip signal (14) and acts synchronously, and a serial communication interface (15) and a network port (16) are arranged on the power supply protection device (1).
6. The low-voltage power supply protection device with the anti-interference electricity function as claimed in claim 5, wherein the controller (21) is electrically connected with the net mouth alarm output end (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221712257.6U CN218449469U (en) | 2022-07-05 | 2022-07-05 | Low-voltage power supply protection device with anti-interference function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221712257.6U CN218449469U (en) | 2022-07-05 | 2022-07-05 | Low-voltage power supply protection device with anti-interference function |
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| Publication Number | Publication Date |
|---|---|
| CN218449469U true CN218449469U (en) | 2023-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221712257.6U Active CN218449469U (en) | 2022-07-05 | 2022-07-05 | Low-voltage power supply protection device with anti-interference function |
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| Country | Link |
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| CN (1) | CN218449469U (en) |
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2022
- 2022-07-05 CN CN202221712257.6U patent/CN218449469U/en active Active
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