CN210837628U - Circuit breaker and position detection device of contact thereof - Google Patents
Circuit breaker and position detection device of contact thereof Download PDFInfo
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- CN210837628U CN210837628U CN201921481648.XU CN201921481648U CN210837628U CN 210837628 U CN210837628 U CN 210837628U CN 201921481648 U CN201921481648 U CN 201921481648U CN 210837628 U CN210837628 U CN 210837628U
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- circuit breaker
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- 230000003287 optical effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 abstract description 5
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- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model relates to a position detection device of circuit breaker and contact thereof, including timing controller and photogate array, the photogate array includes a set of photogate, a set of photogate install in the insulating sleeve of circuit breaker contact, and evenly arrange along the action route of circuit breaker contact, each the detection signal output part of photogate connects timing controller. The problem of among the prior art, because the circuit breaker contact is installed in confined insulating sleeve, can't carry out direct, real monitoring to the stroke of circuit breaker contact, and the stroke error of monitoring is big is solved.
Description
Technical Field
The application belongs to the technical field of power grid relay protection, and particularly relates to a circuit breaker and a position detection device of a contact of the circuit breaker.
Background
The circuit breaker is used as a very important high-voltage switch device, is huge in quantity in a power grid, is not only responsible for normal connection and disconnection of a circuit in a power system, but also plays a role in controlling and protecting the circuit and electric appliances, can cut off or close no-load current and load current in the high-voltage circuit, and cuts off overload current and short-circuit current through the action of a relay protection device when the system has a fault, and has a quite perfect arc extinguishing structure and enough current breaking capacity.
The good functional state of the circuit breaker is the key point for the normal and safe operation of the transformer and the circuit system. When the breaker is switched on or switched off, the stroke-time characteristic of the moving contact is a basis for calculating the switching-on and switching-off speed and is also an important parameter for representing the mechanical characteristic and the circuit breaking capacity of the moving contact, so that the real-time online monitoring of the contact stroke of the breaker is important for improving the safety and the reliability of a power system.
In practical engineering application, the actual position of the contact can not be seen when the breaker contact is in a closed insulating sleeve, and the contact can not be directly monitored. Due to the aging of the device, the calculation of the position of the contact through the transmission mechanism can generate larger errors, the real stroke condition of the contact of the circuit breaker can not be monitored, and great difficulty is caused in drawing the stroke-time characteristic curve of the moving contact of the circuit breaker.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the problem of among the prior art, because the circuit breaker contact is installed in confined insulating sleeve, can't carry out direct, real monitoring to the stroke of circuit breaker contact, and the stroke error of monitoring is big is solved.
The utility model provides a technical scheme that its technical problem adopted is: the position detection device for the circuit breaker contact comprises a timing controller and a photoelectric door array, wherein the photoelectric door array comprises a plurality of photoelectric doors, the photoelectric doors are installed in an insulating sleeve of the circuit breaker contact and are evenly distributed along a stroke route of the circuit breaker contact, and a detection signal output end of each photoelectric door is connected with the timing controller.
Further, according to the position detecting device of this application, photogate includes infrared emission component and infrared receiving element, infrared emission component and infrared receiving element one-to-one symmetry are installed on the insulating tube inner wall of circuit breaker contact, and two adjacent photogates interval settlement distance installation.
Further, according to the position detecting apparatus of the present application, the infrared emitting element is a light emitting diode, and the infrared receiving element is a photo resistor.
Further, according to the position detection device, the signal output end of the photoelectric door is connected with an LED lamp.
The application also provides a circuit breaker, including circuit breaker contact and insulation support, the circuit breaker contact is located insulation support, install foretell position detecting device in the insulation support.
The utility model has the advantages that: this application can be in the position of the intraductal real-time detection circuit breaker contact of confined insulating sleeve, do not receive external disturbance, and the position detection is more accurate, improves electric power system's security and reliability.
Drawings
The technical solution of the present application is further explained below with reference to the drawings and the embodiments.
FIG. 1 is a schematic circuit diagram of a position detection device according to an embodiment of the present application;
figure 2 is a schematic view of an insulating sleeve of a circuit breaker contact of an embodiment of the present application;
fig. 3 is a schematic circuit diagram of a position detecting device according to another embodiment of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Position detection device embodiment:
the embodiment provides a position detection device of circuit breaker contact, and this position detection device is including installing infrared emission component and the infrared ray receiving element on the insulating sleeve inner wall of circuit breaker contact, and the transmission port of infrared emission component and the receiving port one-to-one of infrared receiving element set up relatively, and a photogate is constituteed to a pair of infrared emission component and infrared receiving element.
The infrared emitting element is a light emitting element emitting infrared light, typically a light emitting diode, and the infrared receiving element is a light receiving element receiving a light signal, for receiving the light signal and converting the light signal into an electrical signal, and a photosensitive element is typically used, for example: a photodiode, a phototriode, a photoresistor and the like. The electric signal input end of the light-emitting element is the signal input end of the photoelectric gate, and the electric signal output end of the light-receiving element is the signal output end of the photoelectric gate.
When the breaker is opened and closed, the breaker contact acts, and when the breaker contact passes through the photoelectric door, infrared light emitted by the light-emitting element is blocked by the breaker contact, the light-receiving element cannot receive a light signal or receives a very weak light signal, the detection signal output end of the photoelectric door outputs a detection signal, and the detection signal is sent to the timing controller, and the timing controller records the time when the breaker contact passes through the photoelectric door at the corresponding position, so that the real-time detection of the position of the breaker contact is realized.
In one embodiment, as shown in fig. 1, the infrared receiving element may use a photo-resistor, which can effectively avoid the interference of other light sources. In fig. 1, R is a photoresistor, D is emitting diode, a photogate is formed by the photoresistor R and emitting diode D, a termination power supply R2 of photoresistor R, the other end passes through resistance R2 ground connection, photoresistor R2 still connects the timing controller through an amplifier circuit LM324, the detection signal of photoresistor R2 output is after amplifier circuit LM324 enlargies, export for the timing controller, the timing controller can be realized through STM32F2 singlechip.
The anode of the light emitting diode D is connected with the anode of the power supply V1 through the switch SK, the cathode of the light emitting diode D is grounded through a resistor R1, when the switch SK is pressed, the power supply V1 supplies power to the light emitting diode, the light emitting diode D emits infrared light, and the photoelectric gate starts to work.
When no breaker contact is arranged in the middle of the photoelectric gate for blocking, infrared rays emitted by the light emitting diode D irradiate the photoresistor R, the resistance value of the photoresistor R is reduced, and two ends of the photoresistor R output a low-voltage signal; if the breaker contact acts and passes through the photoelectric gate, the middle of the photoelectric gate is blocked by the breaker contact, infrared rays emitted by the light emitting diode D cannot irradiate the photosensitive resistor R, or infrared rays irradiating the photosensitive resistor R are weaker, the resistance value of the photosensitive resistor R is increased, and a high-voltage signal is output from two ends of the photosensitive resistor R.
As an embodiment, as shown in fig. 1, an LED lamp is further connected to the output terminal of the photoresistor R, and the LED lamp is turned on when the photoresistor R outputs a high level signal, and turned off when the photoresistor outputs a low level signal. The LED lamp is arranged outside the insulating sleeve, and workers can know the working condition of the circuit breaker according to the state of the LED lamp.
In one embodiment, as shown in fig. 2, 5 optical gates G1-G5 are respectively disposed in the insulating sleeve, and the 5 optical gates are disposed along the axial direction of the inner wall of the insulating sleeve 4, located on the stroke path of the breaker contact 3 and spaced apart by a distance L, and each optical gate is installed at a respective set position, and the light emitting port and the receiving port of each optical gate face to the central axis of the insulating sleeve. In fig. 2, 1 is a light emitting element, 2 is a light receiving element, and 1 and 2 constitute a photogate G3.
When the breaker carries out the operation of breaking/closing, the contact action, and pass through G1, G2, G3, G4, G5 in proper order, when the breaker contact passes through photogate G1, photogate G1 sensing to the breaker contact, send high level signal promptly, the singlechip begins timing, and record breaker contact through moment t1 of G1, according to the position of photogate G1, can confirm the position of breaker contact at t1 moment.
Similarly, when the breaker contact passes through G2, the single chip microcomputer receives a high-level signal sent by G2 and records the time t2 when the breaker contact passes through G2, so that the position of the breaker contact at the time t2 is determined; and repeating the steps until the single chip microcomputer receives a high level signal sent by G5, and completing the position detection of the contact of the circuit breaker.
In other embodiments, the infrared receiving element may be a photodiode, as shown in fig. 3, when the photodiode D1 is used, the anode of the photodiode D1 is connected to the anode of the power supply V2, the cathode of the photodiode D1 is grounded through the resistor R2, when the photodiode D1 receives the light emitted by the light emitting diode D, the photodiode D1 is turned off, and no signal is output from the photogate; when light is blocked, the photodiode D1 is turned on according to the voltage applied to its anode, outputting a high voltage signal.
The infrared receiving element can also adopt a photosensitive triode, for example, a PNP type photosensitive triode is adopted, the base level of the PNP type photosensitive triode is a light receiving port, the collector electrode of the PNP type photosensitive triode is connected with the positive electrode of the power supply V2, and the emitting electrode of the PNP type photosensitive triode is grounded. When the base level of the PNP type phototriode receives light irradiation, the PNP type phototriode is conducted, and the emitting electrode outputs an amplified high-level signal; when no light is irradiated, the PNP type phototriode is in a cut-off state, and no electric signal is output.
Because the phototriode itself has a signal amplifying function, an amplifying circuit is not required to be provided at the output terminal thereof, and the phototriode has higher sensitivity than a photodiode.
Circuit breaker embodiments
This embodiment provides a circuit breaker, including circuit breaker contact and insulating sleeve, the circuit breaker contact is located insulating sleeve, installs the position detection device of circuit breaker contact in the insulating sleeve.
The position detection device of the present embodiment is the same as the above-described embodiments.
In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. The position detection device for the circuit breaker contact is characterized by comprising a timing controller and a photoelectric door array, wherein the photoelectric door array comprises a group of photoelectric doors, the group of photoelectric doors are installed in an insulating sleeve of the circuit breaker contact and are uniformly distributed along the action route of the circuit breaker contact, and the detection signal output end of each photoelectric door is connected with the timing controller.
2. The apparatus for detecting the position of the contact of the circuit breaker according to claim 1, wherein the optical gates include an infrared emitting element and an infrared receiving element, the infrared emitting element and the infrared receiving element are installed on the inner wall of the insulating sleeve of the contact of the circuit breaker in a one-to-one symmetrical manner, and two adjacent optical gates are installed at a set distance.
3. The apparatus for detecting the position of a contact of a circuit breaker according to claim 2, wherein the infrared emitting element is a light emitting diode and the infrared receiving element is a photo resistor.
4. The apparatus for detecting the position of the contact of the circuit breaker according to claim 1, wherein an LED lamp is connected to the detection signal output terminal of the photo gate.
5. A circuit breaker comprising a breaker contact and an insulating bushing, said breaker contact being located within the insulating bushing, wherein the position sensing device of any one of claims 1-3 is mounted within the insulating bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921481648.XU CN210837628U (en) | 2019-09-06 | 2019-09-06 | Circuit breaker and position detection device of contact thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921481648.XU CN210837628U (en) | 2019-09-06 | 2019-09-06 | Circuit breaker and position detection device of contact thereof |
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| Publication Number | Publication Date |
|---|---|
| CN210837628U true CN210837628U (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921481648.XU Active CN210837628U (en) | 2019-09-06 | 2019-09-06 | Circuit breaker and position detection device of contact thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115932565A (en) * | 2022-11-15 | 2023-04-07 | 国网河南省电力公司安阳供电公司 | Power transmission and transformation high voltage circuit breaker monitoring circuit |
-
2019
- 2019-09-06 CN CN201921481648.XU patent/CN210837628U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115932565A (en) * | 2022-11-15 | 2023-04-07 | 国网河南省电力公司安阳供电公司 | Power transmission and transformation high voltage circuit breaker monitoring circuit |
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