Fault display circuit and PT intelligent blocker

Abstract

The utility model provides a fault display circuit and a PT intelligent interrupter, the fault display circuit comprises a power supply circuit, a control chip, a control switch circuit and an electrochromic material film, a first input end of the power supply circuit is used for being electrically connected with a first electrode of the PT intelligent interrupter; the second input end of the power supply circuit is electrically connected with a second electrode of the PT intelligent interrupter, the power end of the control chip and the input end of the control switch circuit are both electrically connected with the positive electrode output end of the power supply circuit, and the control chip is electrically connected with the control end of the control switch circuit. The output end of the control switch circuit is electrically connected with the first end of the electrochromic material film, and the second end of the electrochromic material film is grounded. The PT intelligent blocker applies the fault display circuit. The PT intelligent interrupter fault display device can display faults of a PT intelligent interrupter.

Description

Technical Field

[0001] The utility model relates to the technical field of PT intelligent blockers, in particular to a fault display circuit of a PT intelligent blocker and also to a PT intelligent blocker applying the fault display circuit. Background Art

[0002] The application of distribution network PT intelligent blockers usually connects the intelligent blockers in series on the primary side of the PT. Since there is no need to manually disconnect the PT, it can improve the efficiency of fault detection of distribution network overhead lines and greatly shorten the power outage duration, which has been widely promoted. However, the existing PT intelligent blockers face a problem, that is, although the service life of the PT intelligent blockers is more than 10 years, after a fault occurs, when the AC channel is directly connected, there is no direct means to know it in the first time, which has invisibly caused a certain impact on the application of the product.

[0003] Therefore, it is urgent to develop a device for displaying faults of PT intelligent blockers, which can present faults in time and allow users to respond immediately to avoid affecting subsequent operation and maintenance work. Summary of the invention

[0004] The first purpose of the utility model is to provide a fault display circuit which can display faults of a PT intelligent blocker.

[0005] The second object of the utility model is to provide a PT intelligent blocker which can display faults of the PT intelligent blocker.

[0006] In order to achieve the above-mentioned first purpose, the fault display circuit of the PT intelligent blocker provided by the utility model includes a power supply circuit, a control chip, a control switch circuit and an electrochromic material film. The first input end of the power supply circuit is used to be electrically connected to the first electrode of the PT intelligent blocker, the second input end of the power supply circuit is used to be electrically connected to the second electrode of the PT intelligent blocker, the power supply end of the control chip and the input end of the control switch circuit are both electrically connected to the positive output end of the power supply circuit, the control chip is electrically connected to the control end of the control switch circuit, the output end of the control switch circuit is electrically connected to the first end of the electrochromic material film, and the second end of the electrochromic material film is grounded.

[0007] It can be seen from the above scheme that the fault display circuit of the PT intelligent blocker of the utility model is provided with a power supply circuit, a control chip, a control switch circuit and an electrochromic material film. Since there is a voltage difference between the first electrode and the second electrode when the PT intelligent blocker is working normally, the voltage of the first electrode and the second electrode in the PT intelligent blocker can be obtained through the power supply circuit to supply power to the control chip, the control switch circuit and the electrochromic material film, so that the electrochromic material film produces a color indicating that the PT intelligent blocker is normal. When the PT intelligent blocker fails, the AC channel is directly connected, so that the voltage difference between the first electrode and the second electrode is zero, and the power supply to the electrochromic material film is stopped, thereby generating another color to indicate that the PT intelligent blocker fails, so that the user can be informed.

[0008] In a further scheme, the control switch circuit includes an NPN transistor and an N-channel field effect transistor, the collector of the NPN transistor is electrically connected to the positive output terminal of the power supply circuit, the base of the NPN transistor is electrically connected to the control chip, the emitter of the NPN transistor is grounded, the gate of the N-channel field effect transistor is electrically connected to the collector of the NPN transistor, and the source of the N-channel field effect transistor is electrically connected to the first end of the electrochromic material film.

[0009] It can be seen that since the color change of the electrochromic material film has a certain delay, the control switch circuit controls the power supply of the electrochromic material film by setting NPN transistors and N-channel field effect transistors, which can facilitate the control chip to send periodic pulse signals to the control switch circuit for power supply control, which not only saves energy consumption, but also prolongs the life cycle of the electrochromic material film.

[0010] In a further solution, the power supply circuit includes a common mode filter and an AC / DC conversion circuit, and an input end of the AC / DC conversion circuit is electrically connected to the first electrode and the second electrode through the common mode filter.

[0011] It can be seen that the input end of the AC / DC conversion circuit is electrically connected to the first electrode and the second electrode through the common mode filter, which can improve the stability of power supply.

[0012] In a further solution, the power supply circuit also includes a voltage stabilizing circuit, and the positive output terminal of the AC / DC conversion circuit is electrically connected to the power supply terminal of the control chip through the voltage stabilizing circuit.

[0013] It can be seen that the positive output terminal of the AC / DC conversion circuit is electrically connected to the power supply terminal of the control chip through the voltage stabilizing circuit, which can easily convert a higher voltage into a voltage suitable for use by the control chip.

[0014] In order to achieve the second purpose of the utility model, the PT intelligent blocker provided by the utility model includes an insulating shell 11, a capacitor circuit, a first electrode and a second electrode. The capacitor circuit is installed in the insulating shell 11, the first electrode is electrically connected to the first electrode of the capacitor circuit, and the second electrode is electrically connected to the second electrode of the capacitor circuit. The PT intelligent blocker also includes a fault display circuit. The fault display circuit includes a power supply circuit, a control chip, a control switch circuit and an electrochromic material film. The first input end of the power supply circuit is electrically connected to the first electrode, the second input end of the power supply circuit is electrically connected to the second electrode, the power supply end of the control chip and the input end of the control switch circuit are both electrically connected to the positive output end of the power supply circuit, the control chip is electrically connected to the control end of the control switch circuit, the output end of the control switch circuit is electrically connected to the first end of the electrochromic material film, and the second end of the electrochromic material film is grounded; the electrochromic material film is arranged on the outer peripheral wall of the insulating shell 11.

[0015] It can be seen from the above scheme that the PT intelligent blocker of the utility model is provided with a fault display circuit, and the fault display circuit is provided with a power supply circuit, a control chip, a control switch circuit and an electrochromic material film. Since there is a voltage difference between the first electrode and the second electrode when the PT intelligent blocker is working normally, the voltage of the first electrode and the second electrode in the PT intelligent blocker can be obtained through the power supply circuit to supply power to the control chip, the control switch circuit and the electrochromic material film, so that the electrochromic material film produces a color indicating that the PT intelligent blocker is normal. When the PT intelligent blocker fails, the AC channel is directly connected, so that the voltage difference between the first electrode and the second electrode is zero, and the power supply to the electrochromic material film is stopped, thereby generating another color to indicate that the PT intelligent blocker fails, so that the user can be informed.

[0016] In a further solution, the electrochromic material film is disposed around the outer peripheral wall of the insulating housing 11 .

[0017] It can be seen that the electrochromic material film is disposed around the outer peripheral wall of the insulating housing 11, which can increase the display area and facilitate viewing by users.

[0018] In a further scheme, the control switch circuit includes an NPN transistor and an N-channel field effect transistor, the collector of the NPN transistor is electrically connected to the positive output terminal of the power supply circuit, the base of the NPN transistor is electrically connected to the control chip, the emitter of the NPN transistor is grounded, the gate of the N-channel field effect transistor is electrically connected to the collector of the NPN transistor, and the source of the N-channel field effect transistor is electrically connected to the first end of the electrochromic material film.

[0019] It can be seen that since the color change of the electrochromic material film has a certain delay, the control switch circuit controls the power supply of the electrochromic material film by setting NPN transistors and N-channel field effect transistors, which can facilitate the control chip to send periodic pulse signals to the control switch circuit for power supply control, which not only saves energy consumption, but also prolongs the life cycle of the electrochromic material film.

[0020] In a further solution, the power supply circuit includes a common mode filter and an AC / DC conversion circuit, and an input end of the AC / DC conversion circuit is electrically connected to the first electrode and the second electrode through the common mode filter.

[0021] It can be seen that the input end of the AC / DC conversion circuit is electrically connected to the first electrode and the second electrode through the common mode filter, which can improve the stability of power supply.

[0022] In a further solution, the power supply circuit also includes a voltage stabilizing circuit, and the positive output terminal of the AC / DC conversion circuit is electrically connected to the power supply terminal of the control chip through the voltage stabilizing circuit.

[0023] It can be seen that the positive output terminal of the AC / DC conversion circuit is electrically connected to the power supply terminal of the control chip through the voltage stabilizing circuit, which can easily convert a higher voltage into a voltage suitable for use by the control chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a circuit structure diagram of an embodiment of the PT intelligent blocker of the utility model.

[0025] Figure 2 It is a circuit schematic diagram of a power supply circuit in an embodiment of the PT intelligent blocker of the utility model.

[0026] Figure 3 It is a circuit principle diagram of a voltage stabilizing circuit in an embodiment of a PT intelligent blocker of the utility model.

[0027] Figure 4 It is a circuit principle diagram of a control switch circuit in an embodiment of the PT intelligent blocker of the utility model.

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0029] PT intelligent blocker implementation example:

[0030] like Figure 1As shown, in this embodiment, the PT intelligent blocker includes a blocker body 1 and a fault display circuit 2. The blocker body 1 includes an insulating shell 11, a capacitor circuit (not shown), a first electrode 12 and a second electrode 13. The capacitor circuit is installed in the insulating shell 11, the first electrode 12 is electrically connected to the first electrode of the capacitor circuit, and the second electrode 13 is electrically connected to the second electrode of the capacitor circuit. The capacitor circuit is used to block direct current and pass alternating current. The capacitor circuit in the PT intelligent blocker is a technology well known to those skilled in the art and will not be repeated here.

[0031] The fault display circuit 2 includes a power supply circuit 21, a control chip 22, a control switch circuit 23 and an electrochromic material film 24. The first input terminal 211 of the power supply circuit 21 is electrically connected to the first electrode 12, the second input terminal 212 of the power supply circuit 21 is electrically connected to the second electrode 13, the power supply terminal of the control chip 22 and the input terminal of the control switch circuit 23 are both electrically connected to the positive output terminal of the power supply circuit 21, the control chip 22 is electrically connected to the control terminal of the control switch circuit 23, the output terminal of the control switch circuit 23 is electrically connected to the first terminal of the electrochromic material film 24, and the second terminal of the electrochromic material film 24 is grounded.

[0032] In this embodiment, see Figure 2 and Figure 3 The power supply circuit 21 includes a common mode filter T1, an AC / DC conversion circuit 213 and a voltage stabilizing circuit 214. The input end of the AC / DC conversion circuit 213 is electrically connected to the first electrode 12 and the second electrode 13 through the common mode filter T1, and the positive output end of the AC / DC conversion circuit 213 is connected to the input end of the voltage stabilizing circuit 214. The input end of the AC / DC conversion circuit 213 is electrically connected to the first electrode 12 and the second electrode 13 through the common mode filter T1, which can improve the stability of the power supply. By setting the voltage stabilizing circuit 214, it is convenient to convert a higher voltage into a low voltage. Preferably, the AC / DC conversion circuit 213 uses a chip of the LH15-10B05 model, and the voltage stabilizing circuit 214 uses a chip of the AMS1117-3.3 model.

[0033] The control switch circuit 23 can be controlled by a transistor, a relay, or the like. In the present embodiment, the control switch circuit 23 includes an NPN transistor Q1 and an N-channel field effect transistor N1, the collector of the NPN transistor Q1 is electrically connected to the positive output terminal of the power supply circuit 21, the base of the NPN transistor Q1 is electrically connected to the control chip 22 through the terminal CTL, the emitter of the NPN transistor Q1 is grounded, the gate of the N-channel field effect transistor N1 is electrically connected to the collector of the NPN transistor Q1, the source of the N-channel field effect transistor N1 is electrically connected to the first end of the electrochromic material film 24 through the terminal DC, and the drain of the N-channel field effect transistor N1 is electrically connected to the output end of the voltage stabilizing circuit 214. Since the color change of the electrochromic material film 24 has a certain delay, the control switch circuit 23 controls the power supply of the electrochromic material film 24 by setting an NPN transistor Q1 and an N-channel field effect transistor N1, which can facilitate the control chip 22 to send a periodic pulse signal to the control switch circuit 23 for power supply control, which not only saves energy consumption but also prolongs the life cycle of the electrochromic material film 24.

[0034] In this embodiment, the electrochromic material film 24 is disposed on the outer peripheral wall of the insulating housing 11. The electrochromic material film 24 may be an independent device or a structural layer disposed on the insulating housing 11, for example, sprayed on the outer peripheral wall of the insulating housing 11. Preferably, the electrochromic material film 24 is disposed around the outer peripheral wall of the insulating housing 11, which can increase the display area and facilitate user viewing. The electrochromic material film 24 is a technology well known to those skilled in the art and will not be described in detail herein.

[0035] It can be seen from the above scheme that the PT intelligent blocker of the utility model is provided with a fault display circuit 2, and the fault display circuit 2 is provided with a power supply circuit 21, a control chip 22, a control switch circuit 23 and an electrochromic material film 24. Since there is a voltage difference between the first electrode 12 and the second electrode 13 when the PT intelligent blocker is working normally, the voltage of the first electrode 12 and the second electrode 13 in the PT intelligent blocker can be obtained through the power supply circuit 21 to supply power to the control chip 22, the control switch circuit 23 and the electrochromic material film 24, so that the electrochromic material film 24 produces a color indicating that the PT intelligent blocker is normal. When the PT intelligent blocker fails, the AC channel is directly connected, so that the voltage difference between the first electrode 12 and the second electrode 13 is zero, and the power supply to the electrochromic material film 24 is stopped, thereby generating another color to indicate that the PT intelligent blocker fails, so that the user can be informed.

[0036] In addition, PT intelligent blockers include cylindrical PT intelligent blockers, wire-type PT intelligent blockers, drop-fuselage-type PT intelligent blockers, jumper-type PT intelligent blockers and intelligent blockers built into PT.

[0037] It should be noted that the above are only preferred embodiments of the present invention, but the design concept of the invention is not limited thereto, and any non-substantial modifications made to the present invention using this concept also fall within the protection scope of the present invention.

Claims

1. A fault display circuit of a PT intelligent circuit breaker, characterized in that: It includes a power supply circuit, a control chip, a control switch circuit and an electrochromic material film. The first input end of the power supply circuit is used to be electrically connected to the first electrode of the PT intelligent blocker, the second input end of the power supply circuit is used to be electrically connected to the second electrode of the PT intelligent blocker, the power supply end of the control chip and the input end of the control switch circuit are both electrically connected to the positive output end of the power supply circuit, the control chip is electrically connected to the control end of the control switch circuit, the output end of the control switch circuit is electrically connected to the first end of the electrochromic material film, and the second end of the electrochromic material film is grounded.

2. The fault display circuit of the PT intelligent circuit breaker according to claim 1 is characterized in that: The control switch circuit includes an NPN transistor and an N-channel field effect transistor, the collector of the NPN transistor is electrically connected to the positive output terminal of the power supply circuit, the base of the NPN transistor is electrically connected to the control chip, the emitter of the NPN transistor is grounded, the gate of the N-channel field effect transistor is electrically connected to the collector of the NPN transistor, and the source of the N-channel field effect transistor is electrically connected to the first end of the electrochromic material film.

3. The fault display circuit of the PT intelligent circuit breaker according to claim 1 or 2, characterized in that: The power supply circuit includes a common mode filter and an AC / DC conversion circuit, and an input end of the AC / DC conversion circuit is electrically connected to the first electrode and the second electrode through the common mode filter.

4. The fault display circuit of the PT intelligent blocker according to claim 3 is characterized in that: The power supply circuit also includes a voltage stabilizing circuit, and the positive output end of the AC / DC conversion circuit is electrically connected to the power supply end of the control chip through the voltage stabilizing circuit.

5. A PT intelligent blocker, comprising an insulating housing, a capacitor circuit, a first electrode and a second electrode, wherein the capacitor circuit is installed in the insulating housing, the first electrode is electrically connected to the first electrode of the capacitor circuit, and the second electrode is electrically connected to the second electrode of the capacitor circuit; characterized in that: The PT intelligent blocker also includes a fault display circuit, which includes a power supply circuit, a control chip, a control switch circuit and an electrochromic material film. The first input end of the power supply circuit is electrically connected to the first electrode, the second input end of the power supply circuit is electrically connected to the second electrode, the power supply end of the control chip and the input end of the control switch circuit are both electrically connected to the positive output end of the power supply circuit, the control chip is electrically connected to the control end of the control switch circuit, the output end of the control switch circuit is electrically connected to the first end of the electrochromic material film, and the second end of the electrochromic material film is grounded; The electrochromic material film is arranged on the outer peripheral wall of the insulating shell.

6. The PT intelligent blocker according to claim 5 is characterized in that: The electrochromic material film is disposed around the outer peripheral wall of the insulating shell.

7. The PT intelligent blocker according to claim 5 or 6, characterized in that: The control switch circuit includes an NPN transistor and an N-channel field effect transistor, the collector of the NPN transistor is electrically connected to the positive output terminal of the power supply circuit, the base of the NPN transistor is electrically connected to the control chip, the emitter of the NPN transistor is grounded, the gate of the N-channel field effect transistor is electrically connected to the collector of the NPN transistor, and the source of the N-channel field effect transistor is electrically connected to the first end of the electrochromic material film.

8. The PT intelligent blocker according to claim 5 or 6, characterized in that: The power supply circuit includes a common mode filter and an AC / DC conversion circuit, and an input end of the AC / DC conversion circuit is electrically connected to the first electrode and the second electrode through the common mode filter.

9. The PT intelligent blocker according to claim 8, characterized in that: The power supply circuit also includes a voltage stabilizing circuit, and the positive output end of the AC / DC conversion circuit is electrically connected to the power supply end of the control chip through the voltage stabilizing circuit.

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