CN213304966U - Three-phase voltage current protector - Google Patents
Three-phase voltage current protector Download PDFInfo
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- CN213304966U CN213304966U CN202022615300.4U CN202022615300U CN213304966U CN 213304966 U CN213304966 U CN 213304966U CN 202022615300 U CN202022615300 U CN 202022615300U CN 213304966 U CN213304966 U CN 213304966U
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Abstract
The utility model relates to a three-phase voltage current protector, including control module, current sampling module, voltage sampling module, drive module, power module, the input of current sampling module and voltage sampling module's input is outside three-phase electricity respectively, and control module's input is connected respectively to current sampling module's output and voltage sampling module's output, power module provides operating voltage for drive module and control module respectively, drive module includes that three circuit connection is the same and independent first phase drive circuit, second phase drive circuit, third phase drive circuit, first phase drive circuit's input, second phase drive circuit's input, third phase drive circuit's input are connected respectively to control module's output. The utility model discloses three-phase voltage current protector's drive module has adopted three mutually independent drive circuit, realizes the independent drive output control of each phase, and circuit connection is simple, the operation is stable.
Description
Technical Field
The utility model relates to a low-voltage apparatus especially relates to a three-phase voltage current protector.
Background
The three-phase voltage current protector is a monitoring and protecting instrument for multifunctional three-phase power supply system or three-phase electric equipment, and integrates three-phase voltage display, overvoltage protection, undervoltage protection, open-phase protection (open-phase protection), voltage unbalance protection and phase sequence protection (phase error protection).
The driving output of the existing three-phase voltage and current protector directly controls a relay to work to realize output control, however, the application range of the driving output is small, especially for foreign application, the use mode of foreign household three-phase power is different from that of domestic three-phase power, the foreign three-phase power is divided into three paths of single-phase power to be respectively supplied to different floors for use, if the integral relay is still adopted for control, the circuit of one floor has a fault and can directly influence the integral power supply, and the existing driving circuit has the defect of complex circuit connection.
Disclosure of Invention
In view of this, the present invention provides a three-phase voltage current protector with independent driving output and simple circuit connection and stable operation for a driving module.
In order to achieve the above object, the present invention adopts a three-phase voltage current protector, which comprises a control module, a current sampling module, a voltage sampling module, a driving module, and a power module, wherein the input terminal of the current sampling module and the input terminal of the voltage sampling module are respectively provided with external three-phase power, the output terminal of the current sampling module and the output terminal of the voltage sampling module are respectively connected with the input terminal of the control module, the output terminal of the control module is connected with the input terminal of the driving module, the power module respectively provides working voltage for the driving module and the control module, the driving module comprises a first phase driving circuit, a second phase driving circuit and a third phase driving circuit which are connected with the same and independent circuits, the output terminal of the control module is respectively connected with the input terminal of the first phase driving circuit, the input terminal of the second phase driving circuit and the input terminal of the third phase, the first phase driving circuit comprises a resistor R11, a resistor R12, a resistor R17, a resistor R18, a triode Q2, a triode Q3, a triode Q8, a triode Q9 and a relay K1, one end of the resistor R11, the emitter of the triode Q2, one end of the resistor R12 and the emitter of the triode Q3 are all connected with high level, the other end of the resistor R11 is connected with the collector of the triode Q3, the other end of the resistor R12 is connected with the collector of the triode Q2, one end of the resistor R17 is connected with the base electrode of the triode Q2, the other end of the resistor R17 is connected with the collector electrode of the triode Q8, one end of the resistor R18 is connected with the base electrode of the triode Q3, the other end of the resistor R18 is connected with the collector electrode of the triode Q9, the emitter of the triode Q8 and the emitter of the triode Q9 are both grounded, the base of the triode Q8 and the base of the triode Q9 are both connected with the output end of the control module, and the collector of the triode Q2 and the collector of the triode Q3 are respectively connected with two ends of the relay K1.
The driving module of the three-phase voltage and current protector adopts a first phase driving circuit, a second phase driving circuit and a third phase driving circuit which are mutually independent, so that the control module can independently control the three driving circuits, when a corresponding floor circuit fails, the control module only controls a relay of the corresponding driving circuit to act, and the power supply of the failed floor is independently cut off; and the components of the driving circuit are fewer in number and simple in connection, so that the cost can be reduced, the corresponding relay is electrified and disconnected through the conduction action of the two groups of triodes, and the operation is stable and reliable. The utility model discloses three-phase voltage current protector has the advantage of independent drive output, and circuit connection is simple, and reduction in production cost can control relay work steadily.
This practicality further sets up to triode Q2 and triode Q3 for the PNP triode, triode Q8 and Q9 are the NPN triode.
The utility model is further arranged in such a way that the control module inputs the relay breaking signal to the base of the triode Q8, and the control module inputs the relay electrifying signal to the base of the triode Q9.
The control of the electrification and the disconnection of the relay is realized according to the conduction characteristic of the triode, so that the connection between each phase of driving circuit and the control module is simple.
Drawings
Fig. 1 is a schematic block diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a first phase driving circuit according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a second phase driving circuit according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a third phase driving circuit according to an embodiment of the present invention.
Fig. 5 is a schematic circuit diagram of a voltage sampling module according to an embodiment of the present invention.
Fig. 6 is a schematic circuit diagram of a current sampling module according to an embodiment of the present invention.
Fig. 7 is a schematic circuit diagram of a control module according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1-7, the present invention relates to a three-phase voltage-current protector, which comprises a control module, a current sampling module, a voltage sampling module, a driving module, and a power module, wherein the input terminal of the current sampling module and the input terminal of the voltage sampling module are respectively provided with external three-phase power, the output terminal of the current sampling module and the output terminal of the voltage sampling module are respectively connected with the input terminal of the control module, the output terminal of the control module is connected with the input terminal of the driving module, the power module respectively provides working voltage for the driving module and the control module, the driving module comprises three first phase driving circuits, second phase driving circuits and third phase driving circuits which are connected with the same and independent circuits, the output terminal of the control module is respectively connected with the input terminal of the first phase driving circuit, the input terminal of the second phase driving circuit and the input terminal of the third phase,
the first phase driving circuit comprises a resistor R11, a resistor R12, a resistor R17, a resistor R18, a transistor Q18, a relay K18, wherein the transistor Q18 and the transistor Q18 are PNP transistors, the transistors Q18 and the transistor Q18 are NPN transistors, one end of the resistor R18, an emitter of the transistor Q18, one end of the resistor R18 and an emitter of the transistor Q18 are all connected with a high level, the other end of the resistor R18 is connected with a collector of the transistor Q18, one end of the resistor R18 is connected with a base of the transistor Q18, the other end of the resistor R18 is connected with a collector of the transistor Q18, the emitter of the transistor Q18 and the emitter of the transistor Q18 are all grounded, and a signal breaking signal is input to the relay K18, the control module inputs a relay electrifying signal to the base electrode of the triode Q9, the collector electrode of the triode Q2 and the collector electrode of the triode Q3 are respectively connected with two ends of the relay K1,
the second phase driving circuit comprises a resistor R13, a resistor R14, a resistor R19, a resistor R20, a transistor Q20, a relay K20, wherein the transistor Q20 and the transistor Q20 are PNP transistors, the transistor Q20 and the transistor Q20 are NPN transistors, one end of the resistor R20, an emitter of the transistor Q20, one end of the resistor R20 and an emitter of the transistor Q20 are all connected with a high level, the other end of the resistor R20 is connected with a collector of the transistor Q20, one end of the resistor R20 is connected with a base of the transistor Q20, the other end of the resistor R20 is connected with a collector of the transistor Q20, an emitter of the transistor Q20 and an emitter of the transistor Q20 are all grounded, and the base of the transistor Q20 is connected with a signal dividing module 20. The control module inputs a relay electrifying signal to the base electrode of the triode Q11, the collector electrode of the triode Q4 and the collector electrode of the triode Q5 are respectively connected with two ends of the relay K2,
the third phase driving circuit comprises a resistor R15, a resistor R16, a resistor R21, a resistor R22, a transistor Q22, a relay K22, wherein the transistor Q22 and the transistor Q22 are PNP transistors, the transistor Q22 and the transistor Q22 are NPN transistors, one end of the resistor R22, an emitter of the transistor Q22, one end of the resistor R22 and an emitter of the transistor Q22 are all connected with a high level, the other end of the resistor R22 is connected with a collector of the transistor Q22, one end of the resistor R22 is connected with a base of the transistor Q22, the other end of the resistor R22 is connected with a collector of the transistor Q22, an emitter of the transistor Q22 and an emitter of the transistor Q22 are all grounded, and the base of the relay K22 inputs a signal to the transistor Q22. The control module inputs a relay electrifying signal to the base electrode of the triode Q13, and the collector electrode of the triode Q6 and the collector electrode of the triode Q7 are respectively connected with two ends of the relay K3.
According to the above embodiment, the utility model discloses three-phase voltage current protector's drive module has adopted mutually independent first phase drive circuit, second phase drive circuit, third phase drive circuit, makes control module can these three drive circuit of independent control, for example when first corresponding floor circuit breaks down wherein, control module only can control relay K1 action, the power supply of the first phase trouble floor of independent disconnection, and the circular telegram and the branch of cutting apart of corresponding relay are realized to the action of switching on through two sets of triodes, the operation is reliable and stable.
In addition to the above embodiments, there are also other embodiments of the present invention, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and scope of the present invention, and those changes and modifications are equivalent to the technical solutions in the present patent, and then those corresponding changes and modifications are all within the scope of the appended claims.
Claims (3)
1. The utility model provides a three-phase voltage current protector, includes control module, current sampling module, voltage sampling module, drive module, power module, the input of current sampling module and the input of voltage sampling module are outside three-phase electricity respectively, and control module's input is connected respectively to current sampling module's output and voltage sampling module's output, drive module's input is connected to control module's output, power module provides operating voltage, its characterized in that for drive module and control module respectively: the driving module comprises a first phase driving circuit, a second phase driving circuit and a third phase driving circuit which are connected with the same and independent circuits, the output end of the control module is respectively connected with the input end of the first phase driving circuit, the input end of the second phase driving circuit and the input end of the third phase driving circuit, the first phase driving circuit comprises a resistor R11, a resistor R12, a resistor R17, a resistor R18, a triode Q2, a triode Q3, a triode Q8, a triode Q9 and a relay K1, one end of the resistor R11, an emitter of the triode Q2, one end of the resistor R12 and an emitter of the triode Q3 are all connected with high level, the other end of the resistor R11 is connected with a collector of the triode Q3, the other end of the resistor R12 is connected with a collector of the triode Q2, one end of the resistor R17 is connected with a base of the triode Q2, and the other end of the resistor R17 is connected with a collector, the base of triode Q3 is connected to the one end of resistance R18, and the collecting electrode of triode Q9 is connected to the other end of resistance R18, the projecting pole of triode Q8 and the projecting pole of triode Q9 all ground connection, the output of control module is all connected to the base of triode Q8 and the base of triode Q9, the both ends of relay K1 are connected respectively to the collecting electrode of triode Q2 and the collecting electrode of triode Q3.
2. A three-phase voltage current protector according to claim 1 wherein: the triode Q2 and the triode Q3 are PNP triodes, and the triodes Q8 and Q9 are NPN triodes.
3. A three-phase voltage current protector according to claim 1 or 2, characterized in that: the control module inputs a relay breaking signal to the base electrode of the triode Q8, and the control module inputs a relay electrifying signal to the base electrode of the triode Q9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022615300.4U CN213304966U (en) | 2020-11-12 | 2020-11-12 | Three-phase voltage current protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022615300.4U CN213304966U (en) | 2020-11-12 | 2020-11-12 | Three-phase voltage current protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213304966U true CN213304966U (en) | 2021-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022615300.4U Active CN213304966U (en) | 2020-11-12 | 2020-11-12 | Three-phase voltage current protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213304966U (en) |
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2020
- 2020-11-12 CN CN202022615300.4U patent/CN213304966U/en active Active
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