CN213585126U - Power distribution cabinet control circuit based on arc light detection - Google Patents
Power distribution cabinet control circuit based on arc light detection Download PDFInfo
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- CN213585126U CN213585126U CN202022396152.1U CN202022396152U CN213585126U CN 213585126 U CN213585126 U CN 213585126U CN 202022396152 U CN202022396152 U CN 202022396152U CN 213585126 U CN213585126 U CN 213585126U
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- arc light
- transistor
- power supply
- switch board
- control circuit
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Abstract
The utility model discloses a switch board control circuit based on arc light detects, include: an arc light detection unit and an intermediate control unit; the arc light detection unit comprises an arc light detector, a first transistor, a second transistor, a third transistor and an arc light relay; the middle control unit comprises a first branch and a second branch; and a normally open contact of the alternating current contactor is connected in series between the high-voltage power supply and the power supply input end of the power distribution cabinet. The utility model relates to a switch board control circuit based on arc light detection, this switch board control circuit response is sensitive, appears the short circuit in the switch board, during the arc light of striking sparks, the power input of switch board control circuit automatic cutout switch board has avoided the further expansion of accident, has reduced loss of property.
Description
Technical Field
The utility model belongs to the technical field of the power supply, especially, relate to a switch board control circuit based on arc light detects.
Background
In the power supply technology field, the switch board is indispensable, because the cable is crisscross in the switch board, often because the cable joint loosen or insulating ageing arouses the line to strike sparks and produce the arc light to lead to the short circuit to cause the conflagration. Although the high-voltage power distribution cabinet is generally provided with a current protection device, namely, when a cable or electric equipment has a short-circuit fault, the current protection device can disconnect the power supply of the power distribution cabinet, the response is sometimes lagged, the reliability of power-off protection is difficult to ensure, and the damage to the power supply equipment cannot be avoided.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists, the utility model provides a switch board control circuit based on arc light detects, this switch board control circuit response is sensitive, appears the short circuit in the switch board, when producing the arc light of striking sparks, the power input of switch board control circuit automatic cutout switch board has avoided the further expansion of accident, has reduced loss of property.
In order to achieve the above object, the present invention adopts the following technical solutions, including:
an arc light detection unit and an intermediate control unit; the arc light detection unit comprises an arc light detector, a first transistor, a second transistor, a third transistor and an arc light relay, wherein one end of the arc light detector is connected with an adjustable resistor, the other end of the adjustable resistor is connected with a direct current power supply, and the other end of the arc light detector is grounded; the base electrode of the first transistor is connected between the adjustable resistor and the arc light detector through a first resistor, the collector electrode of the first transistor is connected with a direct current power supply through a third resistor and is connected with the base electrode of the second transistor through a fourth resistor, and the emitter electrode of the first transistor is grounded; the collector of the second transistor is connected with a direct-current power supply, and the emitter of the second transistor is connected with the base of the third transistor and is grounded through a fifth resistor; the collector of the third transistor is connected with a direct current power supply through an arc relay, and the emitter of the third transistor is grounded.
Further, the intermediate control unit comprises a first branch and a second branch; the first branch circuit comprises an arc relay normally open contact connected with an alternating current power supply, the other end of the arc relay normally open contact is connected with an intermediate relay, and the other end of the intermediate relay is connected with the other end of the alternating current power supply; the second branch is formed by connecting an intermediate relay normally closed contact and an alternating current contactor in series, and the second branch is connected with the first branch in parallel.
Furthermore, the normally open contact of the alternating current contactor is connected in series between the high-voltage power supply and the power supply input end of the power distribution cabinet.
Further, the arc light detection unit and the intermediate control unit are both installed in the power distribution cabinet.
The utility model relates to a switch board control circuit based on arc light detection, this switch board control circuit response is sensitive, appears the short circuit in the switch board, during the arc light of striking sparks, the power input of switch board control circuit automatic cutout switch board has avoided the further expansion of accident, has reduced loss of property.
Drawings
FIG. 1 is a schematic circuit diagram of an arc light detecting unit according to the present invention.
Fig. 2 is a schematic circuit diagram of the intermediate control unit of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings so as to be more clearly understood by those skilled in the art, and as shown in fig. 1 and 2, the present invention includes:
an arc light detection unit and an intermediate control unit; the arc light detection unit comprises an arc light detector HG, a first transistor BG1, a second transistor BG2, a third transistor BG3 and an arc light relay HGJ, one end of the arc light detector is connected with an adjustable resistor R2, the other end of the adjustable resistor is connected with a direct current power supply + V, and the other end of the arc light detector is grounded; the base electrode of the first transistor BG1 is connected between the adjustable resistor and the arc light detector through a first resistor R1, the collector electrode of the first transistor is connected with a direct current power supply through a third resistor and is connected with the base electrode of a second transistor BG2 through a fourth resistor, and the emitter electrode of the first transistor is grounded; the collector of the second transistor is connected with a direct-current power supply, and the emitter of the second transistor is connected with the base of the third transistor BG3 and is grounded through a fifth resistor; the collector of the third transistor is connected with a direct current power supply through an arc relay, and the emitter of the third transistor is grounded.
Under normal conditions, the arc detector outputs high impedance, the first transistor is switched on, the second transistor is switched off, the third transistor is switched off, and the arc relay HGJ is in a release state; when the arc light detector detects arc light, the arc light detector outputs low impedance, the first transistor is cut off, the second transistor is conducted, the third transistor is conducted, and the arc relay HGJ is in a suction state.
Further, the intermediate control unit comprises a first branch and a second branch; the first branch circuit comprises an arc relay normally open contact HGJ-1 connected with an alternating current power supply of 220V, the other end of the arc relay normally open contact is connected with an intermediate relay ZJ, and the other end of the intermediate relay is connected with the other end of the alternating current power supply; the second branch is formed by connecting an intermediate relay normally closed contact ZJ-1 and an alternating current contactor TC in series, and the second branch is connected with the first branch in parallel.
Furthermore, a normally open contact of the alternating current contactor TC is connected in series between the high-voltage power supply and the power supply input end of the power distribution cabinet.
Under the normal condition, because the arc relay HGJ is in the release state, the normally open contact HGJ-1 of the arc relay is disconnected, the intermediate relay ZJ is in the release state, the normally closed contact ZJ-1 of the intermediate relay is closed, the AC contactor TC is closed, and the power distribution cabinet is in the normal power input; when the arc light detector detects arc light, the normally open contact HGJ-1 of the arc light relay is closed because the arc light relay HGJ is in the actuation state, the normally closed contact ZJ-1 of the intermediate relay is disconnected, the AC contactor TC is released, and the input power supply of the power distribution cabinet is cut off.
Further, the arc light detection unit and the intermediate control unit are both installed in the power distribution cabinet.
The utility model relates to a switch board control circuit based on arc light detection, this switch board control circuit response is sensitive, appears the short circuit in the switch board, during the arc light of striking sparks, the power input of switch board control circuit automatic cutout switch board has avoided the further expansion of accident, has reduced loss of property.
Claims (4)
1. The utility model provides a switch board control circuit based on arc light detects which characterized in that: comprises an arc light detection unit and an intermediate control unit; the arc light detection unit comprises an arc light detector (HG), a first transistor (BG1), a second transistor (BG2), a third transistor (BG3) and an arc light relay (HGJ), wherein one end of the arc light detector is connected with an adjustable resistor (R2), the other end of the adjustable resistor is connected with a direct current power supply (+ V), and the other end of the arc light detector is grounded; the base electrode of the first transistor (BG1) is connected between the adjustable resistor and the arc light detector through a first resistor (R1), the collector electrode of the first transistor is connected with a direct current power supply through a third resistor and is connected with the base electrode of the second transistor (BG2) through a fourth resistor, and the emitter electrode of the first transistor is grounded; the collector of the second transistor is connected with a direct-current power supply, and the emitter of the second transistor is connected with the base of a third transistor (BG3) and is grounded through a fifth resistor; the collector of the third transistor is connected with a direct current power supply through an arc relay, and the emitter of the third transistor is grounded.
2. The switch board control circuit of claim 1, characterized in that: the middle control unit comprises a first branch and a second branch; the first branch circuit comprises an arc relay normally open contact (HGJ-1) connected with an alternating current power supply of 220V, the other end of the arc relay normally open contact is connected with an intermediate relay (ZJ), and the other end of the intermediate relay is connected with the other end of the alternating current power supply; the second branch is formed by connecting an intermediate relay normally closed contact (ZJ-1) and an alternating current contactor (TC) in series, and the second branch is connected with the first branch in parallel.
3. The switch board control circuit of claim 2, characterized in that: and a normally open contact of the alternating current contactor (TC) is connected in series between the high-voltage power supply and the power supply input end of the power distribution cabinet.
4. The switch board control circuit of claim 3, characterized in that: the arc light detection unit and the middle control unit are both installed in the power distribution cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022396152.1U CN213585126U (en) | 2020-10-26 | 2020-10-26 | Power distribution cabinet control circuit based on arc light detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022396152.1U CN213585126U (en) | 2020-10-26 | 2020-10-26 | Power distribution cabinet control circuit based on arc light detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213585126U true CN213585126U (en) | 2021-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022396152.1U Active CN213585126U (en) | 2020-10-26 | 2020-10-26 | Power distribution cabinet control circuit based on arc light detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213585126U (en) |
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2020
- 2020-10-26 CN CN202022396152.1U patent/CN213585126U/en active Active
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