CN210401509U - Three-phase high-voltage live indicating circuit - Google Patents
Three-phase high-voltage live indicating circuit Download PDFInfo
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- CN210401509U CN210401509U CN201920428657.6U CN201920428657U CN210401509U CN 210401509 U CN210401509 U CN 210401509U CN 201920428657 U CN201920428657 U CN 201920428657U CN 210401509 U CN210401509 U CN 210401509U
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Abstract
The utility model provides a three-phase high voltage live indicating circuit, include live wire, zero line and connect the live indicating circuit on the live wire, live indicating circuit including connect the pilot lamp circuit between live wire and zero line and with the parallelly connected step-down circuit of pilot lamp circuit, the pilot lamp circuit is connected with the self-checking circuit, the self-checking circuit is connected with and is done the switching power supply circuit of self-checking circuit and the power supply of pilot lamp circuit place return circuit. The utility model uses the voltage reduction circuit to reduce the voltage of the indicating lamp circuit, so that the voltage of the indicating lamp circuit is far less than the original voltage, thereby improving the circuit safety; the self-checking circuit is used for carrying out charged detection on the charged indicating circuit, an uncharged indicating result caused by the circuit problem of the charged indicating circuit is eliminated, and electric shock accidents caused by wrong judgment are avoided.
Description
Technical Field
The utility model belongs to the technical field of the high-voltage live instructs, especially, relate to a three-phase high-voltage live indicating circuit.
Background
Nowadays, high-voltage equipment is more and more widely applied to power generation, distribution and transmission systems of power systems, and it is particularly necessary to configure a live indication circuit on high-voltage power transmission and distribution facilities in order to avoid personal casualties and equipment damage caused by misoperation of operators under the condition of live. The live indicating circuit is a prompting safety device which is directly arranged on a high-voltage power transmission and distribution facility and can visually display whether the high-voltage power transmission and distribution facility has operating voltage, when the high-voltage power transmission and distribution facility has the operating voltage, an indicating lamp on the live indicating circuit emits flash light, so that people are warned that the high-voltage power transmission and distribution facility is charged, and no indication is provided when no power exists.
The high-voltage live indicating circuit in the prior art is used for indicating a live luminescent lamp and usually uses a neon bulb to be connected on a bus for indicating live, but the neon bulb has high requirement on the electrified voltage which is generally over 32V, and personal injury is easily caused to workers. In addition, the electrified pilot lamp of prior art does not have self-checking function, can't judge the luminescent lamp because do not have electrified not light or because the luminescent lamp trouble does not light, when the luminescent lamp is because the luminescent lamp trouble does not light, not because the high-voltage power failure does not light, makes the staff make the misjudgment to the testing result easily, makes the staff think it is not electrified and leads to the irreparable consequence under the electrified condition of high-voltage.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned problem, provide a three-phase high voltage live indicating circuit.
In order to achieve the above purpose, the utility model adopts the following technical proposal:
the utility model provides a three-phase high voltage live indicating circuit, includes live wire, zero line and connects the electrified indicating circuit on the live wire, electrified indicating circuit including connect the pilot lamp circuit between live wire and zero line and with the parallelly connected step-down circuit of pilot lamp circuit, the pilot lamp circuit is connected with self-checking circuit, self-checking circuit is connected with into the switching power supply circuit of self-checking circuit and pilot lamp circuit place return circuit power supply.
In the three-phase high-voltage live indicating circuit, the indicating lamp circuit comprises an LED lamp and a first divider resistor which are connected in series, wherein one end of the LED lamp, which is far away from the first divider resistor, is connected to the live wire, and one end of the first divider resistor, which is far away from the LED lamp, is connected to the zero line; the voltage reduction circuit comprises a voltage reduction capacitor connected between the live wire and the zero line, and two ends of the voltage reduction capacitor are connected with a discharge resistor in parallel.
In the above three-phase high-voltage live indicating circuit, the self-checking circuit includes a self-checking button for controlling the indicator light circuit to be connected or disconnected to the switching power supply circuit.
In foretell three-phase high voltage live indicating circuit, self-checking circuit connects the common terminal of pilot lamp circuit and live wire, just self-checking circuit is including the second divider resistance, bridge rectifier circuit, diode and the third divider resistance that establish ties in proper order, the both ends of self-checking button are connected respectively in third divider resistance and switching power supply circuit, the one end that bridge rectifier circuit was kept away from to the second divider resistance connect in the common terminal of pilot lamp circuit and live wire.
In foretell high voltage live indicating circuit, the live wire include A phase line, B phase line and C phase line, and all be connected with between A phase line and the zero line, between B phase line and the zero line, between C phase line and the zero line indicating lamp circuit, just A phase line, B phase line, C phase line and the public end of indicating lamp circuit separately all are connected with self-checking circuit.
In foretell three-phase high voltage live indicating circuit, switching power supply circuit includes the switching power supply chip, the input of switching power supply chip is connected in power input end, switching power supply's output is connected in power output end, just self-checking button connect in power output end.
In the above three-phase high-voltage live indicating circuit, each phase line is connected with a locking control circuit, and the locking control circuit is connected with the bridge rectifier circuit of the corresponding phase line.
In the above three-phase high-voltage live indicating circuit, each locking control circuit comprises an optical coupler, a positive input end of the optical coupler is connected to a common end of the bridge rectifier circuit and the diode, the negative input end of the optical coupler is connected with the ground end, the positive output end of the optical coupler is connected with the base electrode of a PNP triode, the emitting electrode of the PNP triode is connected with the power supply output end, the collecting electrode is connected with the base electrode of the first triode, the emitting electrode of the first triode is connected with the ground end, the collector electrode of the first triode is connected with the power supply output end through a fourth voltage-dividing resistor, the collector of the first triode is connected with the base of the second triode through a first biasing resistor, a relay is connected between the collector of the second triode and the power supply output end, the relay is provided with a normally open contact and a normally closed contact which are both used for being connected with the signal output end.
In the above three-phase high-voltage live indicating circuit, the locking control circuit is connected with a locking indicating lamp circuit for indicating a locking state.
In foretell three-phase high voltage live indicating circuit, shutting pilot lamp circuit is including connecting the third triode of first triode base, the collecting electrode of third triode passes through second biasing resistance and connects in the base of fourth triode, the collecting electrode of fourth triode passes through third biasing resistance and connects in the base of fifth triode, the collecting electrode of third triode, fourth triode and fifth triode all is connected in the power supply output end, and the projecting pole all is connected in the ground, just it has the pilot lamp of unblanking to connect in parallel between the projecting pole of fifth triode and the collecting electrode, it has the shut pilot lamp to establish ties between fifth triode and the ground.
The utility model has the advantages that: 1. LEDs and the like are used for replacing neon bulbs, and a voltage reduction circuit is used for reducing the voltage of a line where the LEDs are located, so that the voltage of the line is far smaller than the voltage of the original neon bulbs, and the safety of the circuit is improved; 2. the live indicating circuit is subjected to live detection by using the self-checking circuit, so that an uncharged indicating result caused by the circuit problem of the live indicating circuit is eliminated, and an electric shock accident caused by wrong judgment is avoided; 3. outputting a high-voltage electrification condition by using a locking control circuit so as to output a locking signal; 4. a lockout indicator circuit is used to indicate a lockout condition.
Drawings
Fig. 1 is a circuit diagram of the high voltage indicating circuit of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the present embodiment discloses a three-phase high-voltage live indicating circuit, which includes a live wire, a zero line and a live indicating circuit connected to the live wire, wherein the live indicating circuit includes an indicator light circuit connected to the live wire and a voltage dropping circuit connected in parallel to the indicator light circuit. The live wire comprises an A phase line, a B phase line and a C phase line, an indicator lamp circuit and a voltage reduction circuit are arranged between the A phase line and the zero line, between the B phase line and the zero line and between the C phase line and the zero line, the A phase line, the B phase line and the C phase line are connected with a self-checking circuit respectively with a public end of the indicator lamp circuit, and the self-checking circuit is connected with a switch power supply circuit which supplies power to the self-checking circuit and a loop where the indicator lamp circuit is located.
Specifically, the self-test circuit comprises a self-test button S1 for controlling the indicator light circuit to be switched on or switched off from the switching power supply circuit; the pilot lamp circuit includes LED lamp L and the first divider resistance R177 of establishing ties each other, and LED lamp L keeps away from the one end of first divider resistance R177 and connects in the live wire, and the one end that LED lamp L was kept away from to first divider resistance R177 is connected in zero line N, and the resistance size of first divider resistance R177 can be 1K ohm. The step-down circuit is including connecting step-down electric capacity C4 between live wire and zero line, and step-down electric capacity C4's both ends parallel have discharge resistance R20, and step-down electric capacity C4 can be 10000pF, and discharge resistance R20's resistance size can be 1M ohm. The indicator lamp circuit is stepped down through the step-down circuit, and then the LED lamp L is used as an indicating element of each phase of the indicator lamp circuit, so that compared with neon bulbs, the indicator lamp circuit only needs lower voltage and has higher safety.
Further, in this embodiment, fault detection can be performed on the indicator light circuit through the self-detection circuit, when the indicator light circuit is in a light-off state due to phase line power failure or other reasons, a worker firstly operates the self-detection button S1 to supply power to the indicator light circuit through the switching power supply circuit, if the LED light L is still not on after power-on, the LED light L can be determined to be in a light-off state due to the fault of the indicator light circuit, at this time, the high-voltage line is not necessarily in a power-off state, and the worker cannot easily operate the indicator light circuit to avoid electric shock; if the LED lamp changes from dark to bright after being electrified, the LED lamp L which is caused by the outage of the high-voltage line can be judged to be turned off, the high-voltage line is in the outage state, and workers can operate the LED lamp at ease.
Specifically, the self-checking circuit is connected to the common end of the indicator light circuit and the live wire, and because the live wire includes a phase line a, a phase line B and a phase line C, each phase line is connected with an indicator light circuit, the common end of the indicator light circuit corresponding to the phase line a, the indicator light circuit corresponding to the phase line B and the indicator light circuit corresponding to the phase line C are connected with a self-checking circuit respectively.
Specifically, each self-test circuit comprises a second voltage-dividing resistor R23, a bridge rectifier circuit D2, a diode D4 and a third voltage-dividing resistor R3 which are sequentially connected in series, the resistance values of the second voltage-dividing resistor R23 and the third voltage-dividing resistor R23 are respectively 1K and 10K, the anode of the diode D4 is connected with the third voltage-dividing resistor R3, the cathode of the diode D85is connected with the bridge rectifier circuit D2, and the bridge rectifier circuit D2 is composed of four diodes. Two ends of the self-test button S1 are respectively connected to the third voltage-dividing resistor R3 and the switching power circuit, and one end of the second voltage-dividing resistor R23, which is far away from the bridge rectifier circuit D2, is connected to a common end of the indicator light circuit and the corresponding phase line.
Further, the switching power supply circuit comprises a switching power supply chip U1, wherein the input end of the switching power supply chip U1 is connected to the power supply input end, the output end of the switching power supply is connected to the power supply output end, the power supply output end outputs 12V direct current, and the self-checking button S1 is connected to the power supply output end.
Preferably, each phase line is connected with a blocking control circuit, and the blocking control circuit is connected at the bridge rectifier circuit of the corresponding phase line. Specifically, each locking control circuit comprises an optical coupler U2, a positive input end of the optical coupler U2 is connected to a bridge rectifier circuit D2 through a resistor R29, a negative input end of the optical coupler U2 is connected to the other end of a rectifier D2 through a light emitting diode LED-1, the light emitting diode LED-1 is connected IN parallel with a resistor R26, a value of the resistor R29 is 202 ohms, a value of the resistor R26 is 153 ohms, a common end of the resistor R26 and the bridge rectifier circuit D2 is connected to an output ground end KEY-GND through a diode D11, a diode D13 is further connected between the resistor R29 and the light emitting diode LED-1, and the diode D11 and the diode D13 are diodes of which are IN4007 IN model numbers. A capacitor C9 is connected between the positive input end and the negative input end of the optocoupler U2, and the capacitance value of the capacitor C9 is 100000 PF.
The positive output end of optocoupler U2 is connected to the base of PNP triode, the projecting pole of PNP triode Q1 is connected to the power supply output end, the collecting electrode is connected in the base of first triode Q2, the projecting pole of first triode Q2 is connected to ground, the collecting electrode is connected in the power supply output end through fourth divider resistance R46, and the collecting electrode of first triode Q1 is connected in the base of second triode Q3 through first biasing resistance R47, biasing resistance R47 dereferencing can be 512 ohm, fourth divider resistance dereferencing is 472 ohm. And a relay K is connected between the collector of the second triode Q3 and the power supply output end, the relay K is provided with a normally open contact K1 and a normally closed contact K2, the normally open contact K1 and the normally closed contact K2 are used for connecting a signal output end COM, and two ends of the relay are connected with a diode D22 in parallel. Further, the optocoupler U2 is connected to the base of the PNP triode Q1 through a bias resistor R34, the optocoupler U2 is connected to the power supply output end through a resistor R6 and connected to the ground end through a capacitor C10, wherein the resistance of the resistor R6 is 10K, the value of the capacitor C10 is 100000PF, and the resistance of the resistor R34 is 202 ohms. The collector of the PNP triode Q1 is also grounded through the resistor R43 and the diode D16 with a resistance of 1K, the resistors R37 and R40 with resistances of 512, the common terminal of the resistor R40 and the resistor R37 is grounded through the electrolytic capacitor C13, and the common terminal of the resistor R40 and the electrolytic capacitor C13 is connected to the base of the first triode Q2 through the diode D19.
Furthermore, the locking control circuit is also connected with a locking indicating lamp circuit for indicating the locking state.
The locking indicator lamp circuit comprises a third triode Q4 connected to the base of a first triode Q2, the collector of the third triode Q4 is connected to the base of a fourth triode Q5 through a second biasing resistor R10, the collector of the fourth triode Q5 is connected to the base of a fifth triode Q6 through a third biasing resistor R11, the collectors of the third triode Q4, the collector of the fourth triode Q5 and the collector of the fifth triode Q6 are all connected to the power supply output end, and the emitter of the third triode Q4, the collector of the fourth triode Q5 and the collector of the fifth triode Q6 are all connected to. An unlocking indicator lamp D8 and a resistor R2 are connected in parallel between an emitting electrode and a collecting electrode of the fifth triode Q6, a locking indicator lamp Q7H and a resistor R12 are connected in series between the fifth triode Q6 and the ground end, the resistance values of the resistor R2 and the resistor R12 are both 103 ohms, and LED lamps with different colors are adopted as the unlocking indicator lamp D8 and the locking indicator lamp D7.
Under normal conditions, when the three-phase line is electrified, the LED lamp L is turned on, the locking control circuit outputs a locking signal to the signal output end COM port, and the locking indicator lamp D7 is turned on; when the three-phase power is not electrified, the LED lamp L goes out, the locking control circuit outputs an unlocking signal to the signal output end COM port, and the unlocking indicator lamp D8 is on.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although the terms indicating lamp circuit, step-down circuit, self-test circuit, switching power supply circuit, latch-up control circuit, latch-up indicating lamp circuit, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Claims (10)
1. The utility model provides a three-phase high voltage live indicating circuit, includes live wire, zero line and the electrified indicating circuit of connection on the live wire, its characterized in that, electrified indicating circuit including connect the pilot lamp circuit between live wire and zero line and with the parallelly connected step-down circuit of pilot lamp circuit, the pilot lamp circuit is connected with the self-checking circuit, the self-checking circuit is connected with and is done the switching power supply circuit of self-checking circuit and pilot lamp circuit place return circuit power supply.
2. The three-phase high-voltage live-wire indicating circuit according to claim 1, wherein the indicating lamp circuit comprises an LED lamp and a first divider resistor which are connected in series, wherein one end of the LED lamp, which is far away from the first divider resistor, is connected to the live wire, and one end of the first divider resistor, which is far away from the LED lamp, is connected to the neutral wire; the voltage reduction circuit comprises a voltage reduction capacitor connected between the live wire and the zero line, and two ends of the voltage reduction capacitor are connected with a discharge resistor in parallel.
3. The three-phase high-voltage live indicating circuit according to claim 2, wherein the self-checking circuit comprises a self-checking button for controlling the indicator light circuit to be switched on or switched off from the switching power supply circuit.
4. The three-phase high-voltage live indicating circuit according to claim 3, wherein the self-checking circuit is connected to a common terminal of the indicator light circuit and the live wire, the self-checking circuit comprises a second voltage-dividing resistor, a bridge rectifier circuit, a diode and a third voltage-dividing resistor which are sequentially connected in series, two ends of the self-checking button are respectively connected to the third voltage-dividing resistor and the switching power supply circuit, and one end of the second voltage-dividing resistor, which is far away from the bridge rectifier circuit, is connected to the common terminal of the indicator light circuit and the live wire.
5. The three-phase high-voltage live indicating circuit according to claim 4, wherein the live wire comprises an A phase line, a B phase line and a C phase line, the indicating lamp circuit is connected between the A phase line and a zero line, between the B phase line and the zero line and between the C phase line and the zero line, and the A phase line, the B phase line and the C phase line are connected with the self-checking circuit respectively with a common end of the indicating lamp circuit.
6. The three-phase high-voltage live indicating circuit according to claim 5, wherein the switching power supply circuit comprises a switching power supply chip, an input end of the switching power supply chip is connected to a power input end, an output end of the switching power supply is connected to a power supply output end, and the self-checking button is connected to the power supply output end.
7. The three-phase high voltage live indicating circuit of claim 6, wherein each phase line is connected with a latch control circuit, and the latch control circuit is connected at the bridge rectifier circuit of the corresponding phase line.
8. The three-phase high voltage live indicating circuit of claim 7, wherein each latch control circuit comprises an optocoupler, the positive input end of the optical coupler is connected with the common end of the bridge rectifier circuit and the diode, the negative input end of the optical coupler is connected with the ground end, the positive output end of the optical coupler is connected with the base electrode of a PNP triode, the emitting electrode of the PNP triode is connected with the power supply output end, the collecting electrode is connected with the base electrode of the first triode, the emitting electrode of the first triode is connected with the ground end, the collector electrode of the first triode is connected with the power supply output end through a fourth voltage-dividing resistor, the collector of the first triode is connected with the base of the second triode through a first biasing resistor, a relay is connected between the collector of the second triode and the power supply output end, the relay is provided with a normally open contact and a normally closed contact which are both used for connecting a signal output end.
9. The three-phase high-voltage live indicating circuit according to claim 8, wherein a locking indicating lamp circuit for indicating the locking state is connected to the locking control circuit.
10. The three-phase high-voltage live-wire indicating circuit according to claim 9, wherein the locking indicator light circuit comprises a third triode connected to the base of the first triode, the collector of the third triode is connected to the base of a fourth triode through a second biasing resistor, the collector of the fourth triode is connected to the base of a fifth triode through a third biasing resistor, the collectors of the third triode, the fourth triode and the fifth triode are connected to the power supply output end, the emitters are connected to the ground, an unlocking indicator light is connected in parallel between the emitter and the collector of the fifth triode, and a locking indicator light is connected in series between the fifth triode and the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920428657.6U CN210401509U (en) | 2019-04-01 | 2019-04-01 | Three-phase high-voltage live indicating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920428657.6U CN210401509U (en) | 2019-04-01 | 2019-04-01 | Three-phase high-voltage live indicating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210401509U true CN210401509U (en) | 2020-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920428657.6U Active CN210401509U (en) | 2019-04-01 | 2019-04-01 | Three-phase high-voltage live indicating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210401509U (en) |
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2019
- 2019-04-01 CN CN201920428657.6U patent/CN210401509U/en active Active
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