CN219678118U - Phase-change self-resetting overvoltage and undervoltage protection switch - Google Patents
Phase-change self-resetting overvoltage and undervoltage protection switch Download PDFInfo
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- CN219678118U CN219678118U CN202320543990.8U CN202320543990U CN219678118U CN 219678118 U CN219678118 U CN 219678118U CN 202320543990 U CN202320543990 U CN 202320543990U CN 219678118 U CN219678118 U CN 219678118U
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Abstract
The utility model relates to the technical field of electric appliances, in particular to a phase-switching self-resetting overvoltage and undervoltage protection switch, wherein the input end of the switch is a three-phase electric input end, and when the voltages of all paths of the three-phase electric input ends are normal, a microprocessor module controls a relay module to select any three-phase electric input end to be conducted with a single-phase electric output end; when one voltage in operation is over-voltage and under-voltage, the microprocessor module can control the relay module to select one voltage of the other three-phase electric input end with normal voltage to be conducted with the single-phase electric output end, so that when one or two voltages of the three-phase electric input end are in fault, the normal operation of the three-phase electric input end can be ensured, the normal time of the load voltage of the single-phase electric output end is prolonged, and the working efficiency of the utility model is improved.
Description
Technical Field
The utility model relates to the technical field of electric appliances, in particular to a phase-switching self-resetting overvoltage and undervoltage protection switch.
Background
Overvoltage or undervoltage can be generated in the power supply circuit due to the change of a large load, so that other electric equipment is damaged. In order to maintain the safety of the power supply line, overvoltage and undervoltage protection is needed to be carried out on the power supply line, so that the power supply line is automatically cut off, and the power supply line can be automatically or manually restored again when the line voltage is restored to be normal; in order to further protect the safety of the power supply line, an overvoltage and undervoltage protector integrated with an undervoltage protection function and an overvoltage protection function is currently presented.
The input end and the output end of the existing self-resetting overvoltage/undervoltage switch are single-phase voltages, when overvoltage/undervoltage occurs at the input end, the switch is opened to protect the load from the overvoltage/undervoltage, and when the voltage at the input end is recovered to be normal, the switch is closed to switch on the load. The input end is a single-phase overvoltage/undervoltage switch, and when the voltage of the input end fails, the load of the output end cannot be used.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a phase-switching self-resetting overvoltage and undervoltage protection switch with three-phase voltage at an input end.
The purpose of the utility model is realized in the following way:
a phase-switching self-resetting overvoltage and undervoltage protection switch comprises a three-phase power input end, a single-phase power output end, a voltage signal sampling module, a microprocessor module and a relay module; the three-phase power input end is used for inputting three-phase power; the single-phase power output end is used for outputting single-phase power; the voltage signal sampling module is connected with the three-phase power input end and used for detecting each path of voltage of the three-phase power input end and correspondingly generating a voltage signal of each path; the microprocessor module is used for receiving the voltage signal output by the voltage signal sampling module and generating a control instruction; the relay module is used for receiving a control instruction of the microprocessor module, is connected between the three-phase electric input end and the single-phase electric output end and is used for enabling the single-phase electric output end to be connected with one of the three-phase electric input ends with normal voltage.
Preferably, the three-phase electric input terminal includes an input terminal L1, an input terminal L2 and an input terminal L3; the relay module comprises three relays; the single-phase electric output end comprises an output end L; the output end L is connected with the corresponding input end L1, the input end L2 and the input end L3 through three relays respectively.
Preferably, the relay is a normally open relay.
Preferably, the voltage signal sampling module includes three voltage measuring circuits formed by a plurality of negative voltage resistors, and the three voltage measuring circuits are respectively connected with the corresponding input end L1, the input end L2 and the input end L3 and are used for detecting each path of voltage of the three-phase electric input end.
Preferably, the three-phase power input terminal further comprises a voltage display module for displaying the voltages of all paths of the three-phase power input terminal.
Preferably, the three-phase power supply further comprises an indicator light module for indicating whether each path of voltage of the three-phase power input end is normal or not.
Preferably, the system further comprises a key module, wherein the key module comprises a main switch key and an undervoltage setting key, and the undervoltage setting key is used for setting the undervoltage value of each path and analyzing whether the voltage of each path is normal or not by the microprocessor module.
Preferably, when the voltages of all the three-phase electric input ends are normal, the microprocessor module controls the relay module to select any three-phase electric input end to be conducted with the single-phase electric output end.
Preferably, when the operating microprocessor module has an under-voltage, the microprocessor module can control the relay module to select one of the three-phase electric input terminals with normal voltage to be conducted with the single-phase electric output terminal.
Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:
the input end of the utility model is a three-phase electric input end, when each path of voltage of the three-phase electric input end is normal, the microprocessor module controls the relay module to select any three-phase electric input end to be conducted with the single-phase electric output end; when one voltage in operation is over-voltage and under-voltage, the microprocessor module can control the relay module to select one voltage of the other three-phase electric input end with normal voltage to be conducted with the single-phase electric output end, so that when one or two voltages of the three-phase electric input end are in fault, the normal operation of the three-phase electric input end can be ensured, the normal time of the load voltage of the single-phase electric output end is prolonged, and the working efficiency of the utility model is improved.
Drawings
Fig. 1 is a schematic perspective view of the present utility model.
Fig. 2 is an exploded view of a part of the structure of the present utility model.
Fig. 3 is an electrical schematic of the present utility model.
Fig. 4 is a flow chart of the operation of the present utility model.
Fig. 5 is an electrical schematic of the three-stage relay of the present utility model.
Reference numerals:
1-a housing; 2-a single-phase electrical output; 3-a three-phase electrical input; 4-a control circuit board; 401-a voltage display module; 402-a key module; 403-an indicator light module; 5-relay module.
Detailed Description
The utility model is further described in the following embodiments with reference to the figures, see fig. 1-5:
example 1:
a phase-switching self-resetting overvoltage and undervoltage protection switch comprises a shell 1, a three-phase electric input end 3, a single-phase electric output end 2 and a control circuit board 4; the three-phase electric input end 3 is connected with a three-phase circuit, the three-phase circuit provides three-phase voltage for the three-phase electric input end 3, the three-phase electric input end 3 is divided into an input end L1, an input end L2 and an input end L3, an L1 contact, an L2 contact, an L3 contact and a zero line contact are arranged on the upper side of the shell 1, the single-phase electric output end 2 is an output end L, and an output contact and a zero line contact are arranged on the lower side of the shell 1; the shell 1 is internally provided with a voltage signal sampling module, a microprocessor module and a relay module 5, wherein the voltage signal sampling module is connected with the three-phase electric input end 3 and is used for detecting each path of voltage of the three-phase electric input end 3 and correspondingly generating voltage signals of each path; the microprocessor module is used for receiving the voltage signal output by the voltage signal sampling module and generating a control instruction; the relay module 5 is used for receiving a control instruction of the microprocessor module; the relay module 5 is used for receiving a control instruction of the microprocessor module, and the relay module 5 is connected between the three-phase electric input end 3 and the single-phase electric output end 2 and is used for enabling the single-phase electric output end 2 to be connected into one of the three-phase electric input ends 3; the input end of the utility model is a three-phase electric input end, when each path of voltage of the three-phase electric input end 3 is normal, the microprocessor module controls the relay module to select any three-phase electric input end 3 to be conducted with the single-phase electric output end 2; when one voltage in operation is over-voltage and under-voltage, the microprocessor module can control the relay module to select one voltage of the other three-phase electric input end with normal voltage to be conducted with the single-phase electric output end, so that when one or two voltages of the three-phase electric input end are in fault, the three-phase electric input end can still be ensured to work normally, the normal time of the load voltage of the single-phase electric output end is prolonged, and the working efficiency of the utility model is improved.
Further, the relay module 5 includes three relays, which are normally open relays, and the three relays correspond to the input end L1, the input end L2 and the input end L3, respectively, and the output end L is connected to the corresponding input end L1, input end L2 and input end L3 through the three relays, respectively.
Further, the voltage signal sampling module and the microprocessor module are arranged on the control circuit board 4, wherein the microprocessor is an MCU, the voltage signal sampling module comprises three pressure measuring circuits formed by three negative pressure resistors, and the three pressure measuring circuits are respectively connected with the corresponding input end L1, the input end L2 and the input end L3 and are used for detecting each path of voltage of the three-phase electric input end 3.
Further, the control circuit board 4 is further provided with a voltage display module 401 and an indicator light module 403, and the voltage display module 401 includes three display screens for displaying each path of voltage of the three-phase electric input end 3; the indicator light module 403 includes four indicator lights, and the indicator light module 403 is used for indicating whether each voltage of the three-phase power input end 3 is normal; the voltage display module 401 and the indicator light module 403 are shown on the surface of the casing 1.
Further, the shell 1 is further provided with a key module 402, the key module 402 comprises a main switch key, a switching key, a heightening key and a lowering key, the switching of the overvoltage and undervoltage values of the switch can be realized through the switching key, the overvoltage and undervoltage values of the switch are lowered through the heightening key, the overvoltage and undervoltage values of the switch are further realized through the lowering key, the overvoltage and undervoltage values of the switch are further adjusted manually, and the overvoltage and undervoltage values of each path are used for the microprocessor module to analyze whether the voltages of each path are normal or not.
As shown in fig. 4, after the switch is powered on, the voltage signal sampling module receives and detects each path of voltage signal and outputs the voltage signal to the microprocessor, the microprocessor receives the voltage signal sent by the voltage signal sampling module and generates a control command, if the input end L1 is normal, the K2 and K3 relays are opened, the KI relay is closed, if the L1 phase voltage fails, the L2 phase voltage is detected, if the L2 phase voltage is normal, the K1 and K3 relays are opened, the K2 relay is closed, if the L2 phase voltage fails, the L3 phase voltage is detected, if the L3 phase voltage is normal, the K1 and K3 relays are opened, the K2 relay is closed, if the L3 phase voltage also fails, the K1, K2 and K3 relays are opened, and the failure is indicated through the indicator lamp module 403, when the three-phase voltage input end 3 is restored to be normal, the power on is restored, and the above operation is repeated.
Example 2:
as shown in fig. 5, the present embodiment is substantially the same as embodiment 1, and is different in that the relay of the present embodiment adopts a three-gear relay, where three gears are divided into a first gear, a second gear and a third gear, the first gear, the second gear and the third gear of the relay correspond to an input end L1, an input end L2 and an input end L3 respectively, and the output end L is connected to the corresponding input end L1, input end L2 and input end L3 through three gears of the relay respectively, where when each voltage of the three-phase electric input end 3 is normal, the microprocessor controls the relay module to select any one gear to be closed to realize that one voltage of the three-phase electric input end 3 is conducted with the single-phase electric output end 2; when the voltage of one path of working voltage is over-voltage and under-voltage, the microprocessor module can control the relay module to select the gear of one path of voltage corresponding to one three-phase electric input end with normal voltage to be closed so as to realize the conduction between the three-phase electric input end 3 and the single-phase electric output end 2.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (9)
1. A phase-change self-resetting overvoltage and undervoltage protection switch, comprising:
a three-phase power input terminal (3) for inputting three-phase power;
a single-phase power output terminal (2) for outputting single-phase power;
the voltage signal sampling module is connected with the three-phase electric input end (3) and is used for detecting each path of voltage of the three-phase electric input end (3) and correspondingly generating a voltage signal of each path;
the microprocessor module is used for receiving the voltage signal output by the voltage signal sampling module and generating a control instruction; and
and the relay module (5) is used for receiving a control instruction of the microprocessor module, is connected between the three-phase electric input end (3) and the single-phase electric output end (2) and is used for enabling the single-phase electric output end (2) to be connected into one of the three-phase electric input ends (3) with normal voltage.
2. The switch self-resetting over-voltage and under-voltage protection switch as set forth in claim 1, wherein,
wherein the three-phase power input end (3) comprises an input end L1, an input end L2 and an input end L3;
the relay module comprises three relays;
the single-phase electric output end (2) comprises an output end L;
the output end L is connected with the corresponding input end L1, the input end L2 and the input end L3 through three relays respectively.
3. A phase-change self-resetting over-voltage and under-voltage protection switch as set forth in claim 2, wherein,
wherein the relay is a normally open relay.
4. A phase-change self-resetting over-voltage and under-voltage protection switch as set forth in claim 2, wherein,
the voltage signal sampling module comprises three pressure measuring circuits formed by a plurality of negative pressure resistors, wherein the three pressure measuring circuits are respectively connected with a corresponding input end L1, an input end L2 and an input end L3 and are used for detecting each path of voltage of the three-phase electric input end (3).
5. The phase-change self-resetting overvoltage/undervoltage protection switch according to claim 1, further comprising a voltage display module (401) for displaying the voltages of the three-phase electric input terminal (3).
6. A phase-change self-resetting overvoltage and undervoltage protection switch as claimed in claim 1, further comprising an indicator light module (403) for indicating whether the voltages of the three-phase electrical input (3) are normal.
7. The switch-switching self-resetting overvoltage-undervoltage protection switch according to claim 1, further comprising a key module (402) including a main switch key and an overvoltage-undervoltage setting key, wherein the overvoltage-undervoltage setting key is used for setting an overvoltage-undervoltage value of each path, and the microprocessor module is used for analyzing whether each path of voltage is normal.
8. A phase-change self-resetting overvoltage and undervoltage protection switch as recited in any one of claims 2-7, wherein,
when the voltages of all the three-phase electric input ends (3) are normal, the microprocessor module controls the relay module (5) to select any one of the three-phase electric input ends (3) to be conducted with the single-phase electric output end (2).
9. A switch-over-voltage protection switch according to any of claims 2-7, characterized in that when an operating microprocessor module is under-voltage, the microprocessor module is capable of controlling the relay module (5) to select one of the three-phase electrical inputs (3) having a normal voltage to be conducted with the single-phase electrical output (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320543990.8U CN219678118U (en) | 2023-03-17 | 2023-03-17 | Phase-change self-resetting overvoltage and undervoltage protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320543990.8U CN219678118U (en) | 2023-03-17 | 2023-03-17 | Phase-change self-resetting overvoltage and undervoltage protection switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219678118U true CN219678118U (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320543990.8U Active CN219678118U (en) | 2023-03-17 | 2023-03-17 | Phase-change self-resetting overvoltage and undervoltage protection switch |
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| Country | Link |
|---|---|
| CN (1) | CN219678118U (en) |
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2023
- 2023-03-17 CN CN202320543990.8U patent/CN219678118U/en active Active
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