CN220585171U - Circuit structure of leakage circuit breaker - Google Patents
Circuit structure of leakage circuit breaker Download PDFInfo
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- CN220585171U CN220585171U CN202322308651.4U CN202322308651U CN220585171U CN 220585171 U CN220585171 U CN 220585171U CN 202322308651 U CN202322308651 U CN 202322308651U CN 220585171 U CN220585171 U CN 220585171U
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Abstract
The utility model relates to the technical field of electric leakage circuit breakers, in particular to a circuit structure of an electric leakage circuit breaker; comprising the following steps: the power supply circuit comprises an input end, an output circuit and an output end; the zero sequence transformer is connected to the power circuit; the leakage special integrated chip is connected to the output circuit; the main circuit leakage signal circuit is connected to the leakage special integrated chip and is connected with the zero sequence transformer; the driving coil tripping circuit is connected to the electric leakage special integrated chip; the direct-current coil is controlled by a driving coil tripping circuit; when the circuit is reversely connected, the coil is not easy to burn.
Description
Technical Field
The utility model relates to the technical field of electric leakage circuit breakers, in particular to a circuit structure of an electric leakage circuit breaker.
Background
The product is a circuit structure of electric leakage circuit breaker, when the electric leakage condition appears in the circuit, the circuit board can be used for controlling the conduction of the electrified tripping coil to generate magnetic force, thereby the related mechanism of the electric leakage circuit breaker is pulled, the electric leakage circuit breaker is tripped, most of the electric leakage circuit breakers commonly used in the market are high-voltage (380V/220V) coils, when the circuit breaker product is reversely connected (the three-phase electric input end is connected with the output end of the circuit breaker, the input end of the circuit breaker is connected with the load end), when the product generates electric leakage and trips, the circuit board is still in an electric state, and the coils still can be in a conducting state. The conventional high-voltage coil cannot be reversely connected with a circuit breaker product, and once the circuit breaker product is reversely connected, the high-voltage coil is always in a short-circuit working state and cannot be closed when electric leakage tripping occurs, so that the release coil can be instantaneously burnt.
Accordingly, there is an urgent need to provide an improved solution to the above technical problems.
Disclosure of Invention
The utility model aims to provide a technical effect of a circuit structure of an electric leakage breaker which can be reversely connected and cannot be burnt out aiming at the technical problems.
In view of the above, the present utility model provides a circuit structure of an earth leakage breaker, comprising:
the power supply circuit comprises an input end, an output circuit and an output end;
the zero sequence transformer is connected to the power circuit;
the leakage special integrated chip is connected to the output circuit;
the main circuit leakage signal circuit is connected to the leakage special integrated chip and is connected with the zero sequence transformer;
the driving coil tripping circuit is connected to the electric leakage special integrated chip;
and the direct current coil is controlled by a driving coil tripping circuit.
Further, the method further comprises the following steps:
and closing the coil tripping circuit, wherein the coil tripping circuit can be closed to drive the coil tripping circuit.
Further, the method further comprises the following steps:
the delay tripping circuit is connected with a delay control output pin of the special leakage chip.
Further, the method further comprises the following steps:
and the leakage value adjusting circuit is connected to the leakage application-specific integrated chip.
Further, the method further comprises the following steps:
and the magnetic ring test jump circuit is connected to the zero sequence transformer.
Further, the method further comprises the following steps:
the coil protection diode is arranged in parallel with the direct current coil.
Further, an anti-disturbance circuit is also included.
Further, the method further comprises the following steps:
the driving alarm module circuit is connected to the electric leakage special integrated chip;
and the external alarm module is connected to the driving alarm module circuit.
The beneficial effects of the utility model are as follows:
1. when the circuit is reversely connected, the input end of the three-phase rectifying circuit is connected with the output end of the leakage circuit breaker, the input end of the leakage circuit breaker is connected with the load end, the leakage circuit breaker trips during electricity leakage, the circuit board is still in a current state, and the direct-current coil is in a conducting state, and the coil is not easy to burn because of the low-voltage direct-current coil.
2. The coil tripping circuit can enable the direct-current coil to be closed, and avoid burning of the direct-current coil.
Drawings
FIG. 1 is a schematic diagram of a power circuit structure of the present utility model;
fig. 2 is a schematic circuit diagram of embodiment 1 of the present utility model;
FIG. 3 is a schematic diagram of the leakage value adjustment circuit and delay trip circuit of the present utility model;
fig. 4 is a schematic diagram of a magnetic ring test jump circuit structure according to the present utility model.
The label in the figure is:
1. a three-phase rectifying circuit; 2. an output circuit; 3. a zero sequence transformer; 4. an electric leakage special integrated chip; 5. a main circuit leakage signal circuit; 6. a drive coil trip circuit; 7. closing the coil tripping circuit; 8. a delay trip circuit; 9. a leakage value adjusting circuit; 10. a magnetic ring test trip circuit; 11. a coil protection diode; 12. an anti-disturbance circuit; 13. an external alarm module; 14. driving an alarm module circuit; 15. a magnetic ring current wire plug; 16. inputting a safety circuit; 17. an input end; 18. an output end; 19. a resistor step-down current limiting circuit; 20. an RC voltage spike absorbing circuit; 21. magnetic ring test wire-jumping socket; 22. a DC coil.
Detailed Description
Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some of the embodiments of the present application, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.
Example 1:
the embodiment provides a circuit structure of an earth leakage breaker, which is characterized by comprising:
the power supply circuit comprises a three-phase rectifying circuit 1 and an output circuit 2, and the output circuit 2 is connected with the three-phase rectifying circuit 1;
the zero sequence transformer 3, the zero sequence transformer 3 is connected to the power circuit;
the electric leakage special integrated chip 4, the electric leakage special integrated chip 4 is connected to the output circuit 2;
the main circuit leakage signal circuit 5 is connected to the leakage special integrated chip 4 and is connected with the zero sequence transformer 3;
the driving coil tripping circuit 6 is connected to the electric leakage special integrated chip 4;
the dc coil 22, the dc coil 22 is controlled by the drive coil trip circuit 6.
As shown in fig. 1, fig. 1 is a power circuit, the power circuit is provided with an input safety circuit 16, the safety circuit can protect the power circuit from being burnt, and the input protection circuit has overcurrent and overvoltage protection and current limiting effects in an alternating current input loop; the three-phase rectifying circuit 1 is further arranged, the three-phase rectifying circuit 1 is connected behind the input protection circuit, the three-phase rectifying circuit 1 can rectify input alternating current into pulse direct current, the resistor step-down current limiting circuit 19 is arranged in series, the output voltage is enabled to be +5V, the output circuit 2 is connected on the three-phase rectifying circuit 1 in series, the output direct current of the three-phase rectifying circuit 1 is enabled to be +5V, the RC voltage spike absorbing circuit 20 is connected on the output circuit 2 in parallel, and in order to reduce turn-off loss and spike voltage, the RC voltage spike absorbing circuit 20 can improve the performance of the circuit, and in general, the power circuit outputs direct current.
The zero sequence transformer 3 is connected to a power circuit, and a magnetic ring current line plug 15 at one end is connected to JP 2.
The power supply circuit is connected to the electric leakage special integrated chip 4, the main circuit electric leakage signal circuit 5 is connected to the electric leakage special integrated chip 4, and signals are sent through the zero sequence transformer 3 to perform electric leakage sampling, when electric leakage occurs, the electric signals are transmitted to the driving coil tripping circuit 6 through the electric leakage special integrated chip 4, VT5 of the driving coil tripping circuit 6 works to enable the direct current coil 22 to be electrified, the direct current coil 22 generates magnetism, and tripping is completed.
The dc coil 22 is a dc coil 22 having an operating range of 9V to 15V.
When the circuit is reversely connected, the input end 17 of the three-phase rectifying circuit 1 is connected with the output end 18 of the leakage circuit breaker, the input end 17 of the leakage circuit breaker is connected with the load end, when in leakage, the leakage circuit breaker trips, the circuit board is still in a current state, and the direct current coil 22 is in a conducting state, and the coil is not easy to burn because of the adopted low-voltage direct current coil 22.
Example 2:
the present embodiment provides a circuit configuration of an earth leakage breaker having the following technical features in addition to the technical scheme including the above embodiment.
Further comprises:
the coil trip circuit 7 is turned off, and the coil trip circuit 7 may turn off the driving coil trip circuit 6.
The electric signal transmitted by the electric leakage special integrated chip 4 is transmitted to the driving coil tripping circuit 6, and simultaneously, the electric signal is also transmitted to the closing coil tripping circuit 7 to charge the C10 capacitor, when the C10 capacitor is full, the MOS tube of the VT3 is conducted, so that the voltage of the driving coil tripping circuit 6 is pulled down, the MOS tube of the VT5 cannot work normally, the direct current coil 22 is closed, and the direct current coil 22 is prevented from being burnt.
Further, the capacity of the capacitor in the closing coil trip circuit 7 can be changed to change the closing time.
Further comprises:
the delay tripping circuit 8 is connected with a delay control output pin of the special-purpose chip for leakage.
The delay tripping circuit 8 is provided with three gears, namely 1, 3 and 4, and the switch 2 is picked to different gears, so that capacitors with different capacities can be charged, and thus, different time trips can be delayed.
Further comprises:
the leakage value adjusting circuit 9, the leakage value adjusting circuit 9 is connected to the leakage application specific integrated chip 4.
The leakage value adjusting circuit 9 is provided with three gears, namely 1, 3 and 4, and the switch 2 is picked up to different gears, so that resistors with different resistance values can be connected in the circuit, and the leakage value is adjusted.
Example 3:
the present embodiment provides a circuit configuration of an earth leakage breaker having the following technical features in addition to the technical scheme including the above embodiment.
Further comprises:
the magnetic ring test jump circuit 10, the magnetic ring test jump circuit 10 is connected to the zero sequence transformer 3.
The magnetic ring current wire plug 15 in the figure is connected to the magnetic ring test jumper socket 21, and when the test is performed, the S3 is closed to simulate electric leakage, so that the electric leakage special integrated chip 4 drives the direct current coil 22 to work, and tripping is realized.
Further comprises:
the coil protection diode 11, the coil protection diode 11 is disposed in parallel with the dc coil 22.
The coil protection diode 11 can protect the direct current coil 22 and prevent the direct current coil 22 from being burnt.
An anti-disturbance circuit 12 is also included.
By connecting an anti-interference circuit 12 in series with the direct current coil 22, the magnetic ring test jump circuit 10 has better performance and stability, prevents signal distortion and prevents the circuit from failing to work normally.
Further comprises:
the driving alarm module circuit 14 is connected to the electric leakage special integrated chip 4;
the external alarm module 13, the external alarm module 13 is connected to the driving alarm module circuit 14.
The electric leakage special integrated chip 4 is also connected with a driving alarm module circuit 14, and when the S3 is closed or electric leakage occurs, the driving alarm module circuit 14 drives the external alarm module 13 to alarm, and the direct current coil 22 does not work at the moment.
The embodiments of the present application and the features of the embodiments may be combined without conflict, and the present application is not limited to the specific embodiments described above, which are merely illustrative, not restrictive, and many forms may be made by those of ordinary skill in the art, without departing from the spirit of the present application and the scope of the claims, which are also within the scope of the present application.
Claims (9)
1. A circuit structure of an earth leakage breaker, characterized by comprising:
the power supply circuit comprises a three-phase rectifying circuit (1) and an output circuit (2), and the output circuit (2) is connected with the three-phase rectifying circuit (1);
the zero sequence transformer (3), the zero sequence transformer (3) is connected to the power supply circuit;
the special leakage integrated chip (4) is connected to the output circuit (2);
the main circuit leakage signal circuit (5), the main circuit leakage signal circuit (5) is connected to the leakage special integrated chip (4) and is connected with the zero sequence transformer (3);
the driving coil tripping circuit (6) is connected to the electric leakage special integrated chip (4);
and the direct-current coil (22), wherein the direct-current coil (22) is controlled by the drive coil tripping circuit (6).
2. The circuit structure of an earth leakage breaker according to claim 1, further comprising:
and the coil tripping circuit (7) is closed, and the coil tripping circuit (7) can close the drive coil unhooking circuit.
3. The circuit structure of an earth leakage breaker according to claim 1, further comprising:
the delay tripping circuit (8) is connected with a delay control output pin of the special-purpose chip for leakage.
4. The circuit structure of an earth leakage breaker according to claim 1, further comprising:
and the leakage value adjusting circuit (9) is connected to the leakage application specific integrated chip (4).
5. The circuit structure of an earth leakage breaker according to claim 1, further comprising:
the magnetic ring test jump circuit (10), the magnetic ring test jump circuit (10) is connected to the zero sequence transformer (3).
6. The circuit structure of an earth leakage breaker according to claim 1, further comprising:
and a coil protection diode (11), wherein the coil protection diode (11) is connected in parallel with the DC coil (22).
7. The circuit configuration of an earth leakage breaker according to claim 1, further comprising an anti-disturbance circuit (12).
8. The circuit structure of an earth leakage breaker according to claim 1, further comprising:
the driving alarm module circuit (14) is connected to the electric leakage special integrated chip (4);
and the external alarm module (13), and the external alarm module (13) is connected to the driving alarm module circuit (14).
9. The circuit configuration of an earth leakage breaker according to claim 1, wherein the dc coil (22) is a dc coil (22) having an operating voltage in the range of 9V to 15V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322308651.4U CN220585171U (en) | 2023-08-25 | 2023-08-25 | Circuit structure of leakage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322308651.4U CN220585171U (en) | 2023-08-25 | 2023-08-25 | Circuit structure of leakage circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220585171U true CN220585171U (en) | 2024-03-12 |
Family
ID=90107266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322308651.4U Active CN220585171U (en) | 2023-08-25 | 2023-08-25 | Circuit structure of leakage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220585171U (en) |
-
2023
- 2023-08-25 CN CN202322308651.4U patent/CN220585171U/en active Active
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