CN212031669U - Arc extinguishing performance detection device of circuit breaker - Google Patents
Arc extinguishing performance detection device of circuit breaker Download PDFInfo
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- CN212031669U CN212031669U CN202020513551.9U CN202020513551U CN212031669U CN 212031669 U CN212031669 U CN 212031669U CN 202020513551 U CN202020513551 U CN 202020513551U CN 212031669 U CN212031669 U CN 212031669U
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Abstract
The application provides a circuit breaker arc extinguishing performance detection device for receive and store the circuit breaker and produce the electromagnetic wave signal that electric arc arouses, this detection device includes the shell, set up in inside sensor of shell, host computer, battery and the diode of being connected with the shell, the electromagnetic wave signal that electric arc arouses is received to the sensor and the host computer is transmitted, the host computer analysis is the information of relevant electric arc and then is appraised circuit breaker arc extinguishing performance in the electromagnetic wave signal. And a large-capacity battery is adopted to stably supply power to the sensor and the host, so that the influence caused by the voltage fluctuation of the alternating-current power supply of the power grid is avoided. The diode is additionally arranged between the shell and the grounding grid, the anode of the diode is connected with the shell, the cathode of the diode is connected with the grounding grid, when the potential of the shell rises due to electrostatic induction on the shell, the diode is conducted in the forward direction to release charges on the shell to the grounding grid, and when the transient state of the ground potential rises, the diode is cut off in the reverse direction to block the transient state ground potential to counterattack, so that the normal operation of the sensor and the host is protected.
Description
Technical Field
The application relates to the technical field of electrical equipment detection, in particular to a circuit breaker arc extinguishing performance detection device.
Background
When a circuit breaker opens and closes a current carrying circuit, an arc often occurs between contacts, and the circuit breaker is easily burned by the huge energy generated by the arc. The circuit breaker has the ability of eliminating electric arc, and circuit breaker arc extinguishing performance promptly can protect the normal work of circuit breaker. Therefore, in order to guarantee the normal operation of the circuit breaker, the arc extinguishing performance of the circuit breaker needs to be detected.
As shown in fig. 1, the detection of the arc extinguishing performance of the circuit breaker is to receive electromagnetic waves excited by an arc through a sensor, and analyze characteristics of electromagnetic wave signals through a host connected with the sensor, wherein the sensor and the host are installed inside a shell, the host supplies power by means of a 220V alternating current power supply, the 220V alternating current power supply is stepped down and rectified into a 12V direct current power supply to supply power to the sensor, and the shell is connected with a grounding grid of a transformer substation in order to eliminate electrostatic induction in the working process.
However, in the process of opening and closing the circuit breaker, current pulses formed by electric arc reignition are transmitted into the grounding grid through a grounding wire connected with a shell of the circuit breaker, so that transient ground potential rises, and therefore breakdown damage of the sensor and the host is caused, and the voltage of the 220V alternating-current power supply is changed due to the transient ground potential rise, and further normal operation of the sensor and the host is influenced.
SUMMERY OF THE UTILITY MODEL
The application provides a circuit breaker arc extinguishing performance detection device to solve the problem that circuit breaker arc extinguishing performance detection device easily receives alternating current power supply voltage influence and transient state ground potential rising leads to normal operating among the prior art.
The detection device is used for receiving and storing electromagnetic wave signals generated by arc excitation of a circuit breaker, and comprises a shell, a sensor, a host, a battery and a diode, wherein the sensor, the host, the battery and the diode are arranged in the shell;
the sensor is connected with the host, the sensor is used for receiving electromagnetic wave signals and transmitting the electromagnetic wave signals to the host, and the host is used for analyzing the electromagnetic wave signals and storing analyzed information;
the battery is a high-capacity direct-current power supply, and is respectively electrically connected with the sensor and the host machine and used for supplying power to the sensor and the host machine;
the anode of the diode is connected with the shell, and the cathode of the diode is connected with the grounding grid.
Optionally, the sensor, the host and the battery are fixed in the housing by an insulating support plate.
Optionally, the thickness of the insulating support plate is not less than 1 cm.
Optionally, a voltage stabilizer is disposed between the battery and the sensor.
Optionally, an inverter is disposed between the battery and the host.
Optionally, the capacity of the battery is not lower than 40 AH.
Optionally, the response time of the diode is not more than 100ns, the reverse working voltage is not lower than 2KV, and the forward conduction steady-state current is not lower than 10A.
In the arc extinction performance detection device, the sensor receives electromagnetic wave signals excited by the arc and transmits the electromagnetic wave signals to the host, and the host analyzes information about the arc in the electromagnetic wave signals so as to evaluate the arc extinction performance of the circuit breaker. And a large-capacity battery is adopted to stably supply power to the sensor and the host, so that the influence caused by the voltage fluctuation of the alternating-current power supply of the power grid is avoided. The diode is additionally arranged between the shell and the grounding grid, the anode of the diode is connected with the shell, the cathode of the diode is connected with the grounding grid, when the potential of the shell rises due to electrostatic induction on the shell, the diode is conducted in the forward direction to release charges on the shell to the grounding grid, and when the transient state of the ground potential rises, the diode is cut off in the reverse direction to block the transient state ground potential to counterattack, so that the normal operation of the sensor and the host is protected.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a conventional circuit breaker arc extinguishing performance detection device;
fig. 2 is a schematic structural diagram of a device for detecting arc extinguishing performance of a circuit breaker according to the present application.
The system comprises a shell, a sensor, a host, a battery, a diode, a host, a voltage stabilizer and an inverter, wherein the shell is 1 part, the sensor is 2 part, the host is 3 part, the battery is 4 part, the diode is 5 part, the insulating support plate is 6 part, and the voltage stabilizer is 7 part and the inverter is 8 part.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The application provides a circuit breaker arc extinguishing performance detection device, detection device is used for receiving and storing the electromagnetic wave signal that the circuit breaker produced the electric arc excitation, refers to fig. 2, detection device include shell 1, set up in the inside sensor 2 of shell 1, host computer 3, battery 4 and with diode 5 that shell 1 is connected, wherein, shell 1 does detection device's shell.
The sensor 2 is connected with the host machine 3, when the breaker is disconnected and a current-carrying circuit is closed, an electric arc is generated between contacts, the frequency generated by the electric arc is high, the sensor 2 preferably adopts an ultrahigh frequency sensor, an electric arc excited electromagnetic wave signal is received by the sensor 2 and transmitted to the host machine 3, an electromagnetic wave signal processing unit and a storage unit are arranged in the host machine 3, the electromagnetic wave signal processing unit processes the collected electromagnetic wave signal, data related to the electric arc is obtained, and the data are transmitted to the storage unit for storage. Sensor 2 with in the 3 course of work of host computer, sensor 2 adopts 12V DC power supply to supply power, host computer 3 adopts 220V AC power supply to supply power, battery 4 is large capacity DC power supply, battery 4 electricity respectively is connected sensor 2 with host computer 3 can provide 12V DC output and 220V AC output, to sensor 2 with the power supply of host computer 3. The shell of the circuit breaker with shell 1 connects the ground net through the earth connection jointly, and the electric current pulse that the electric arc restrike formed spreads into the ground net through the earth connection of being connected with the circuit breaker shell, causes transient state earth potential to rise, shell 1 easily induces the overvoltage to sense through the radiation coupling in the shell 1 internal circuit. If the withstand voltage levels of the sensor 2 and the host 3 are low, the sensor 2 and the host 3 may be broken down. In order to avoid breakdown damage of the sensor 2 and the host 3, the diode 5 is arranged between a grounding grid and the shell 1, the anode of the diode 5 is connected with the shell 1, the cathode of the diode 5 is connected with the grounding grid, when the potential of the shell 1 rises due to electrostatic induction on the shell, the diode 5 is conducted in the forward direction to release charges on the shell 1 to the grounding grid, and when the ground potential transient rises, the diode 5 is cut off in the reverse direction to block the transient ground potential from counterstriking, so that the normal operation of the sensor 2, the host 3 and the battery 4 is protected.
The sensor 2, the host 3 and the battery 4 are fixed in the housing 1 by an insulating support plate 6. The sensor 2, the host 3 and the battery 4 are taken as a single element, the element is also provided with a shell, for example, the battery 4 is provided with a shell, the maximum voltage withstanding values of the sensor 2, the host 3 and the battery 4 are fixed, the value of the induced overvoltage of the shell 1 is not fixed, the shell of the sensor 2, the shell of the host 3 and the shell of the battery 4 are blocked by the insulating support plate 6, and the shell of the sensor 2, the shell of the host 3 and the shell of the battery 4 are prevented from being connected with the shell 1, so that the breakdown damage of the sensor 2, the host 3 and the battery 4 caused by the transient ground potential.
The thickness of the insulating support plate 6 is not less than 1 cm. The speed of opening or closing the circuit breaker contact is slow, generally 1cm/s, the time of the shell 1 for inducing overvoltage is long, preferably, the insulating support plate 6 is made of silicon rubber or chloroprene rubber or other rubber with the similar insulating coefficient to the silicon rubber and the chloroprene rubber, the thickness of the insulating support plate 6 is not less than 1cm, the voltage of 10kV can be resisted, and the inside of the shell 1 is protected from breakdown and damage.
The battery 4 has internal resistance, the internal resistance of the battery 4 is gradually increased in the discharging process of the battery 4, a part of voltage of the battery 4 is supplied to the internal resistance, the voltage of the sensor 2 supplied by the battery 4 is reduced, and a voltage stabilizer 7 or other voltage stabilizing circuits are arranged between the battery 4 and the sensor 2 in order that the sensor 2 obtains 12V stable voltage.
The battery 4 outputs 12V direct current, the host 3 needs 220V alternating current for power supply, and an inverter 8 or other circuits for converting the direct current into the alternating current are arranged between the battery 4 and the host 3.
The application provides an arc extinguishing performance detection device's operating current is 0.55A, in order to reduce battery 4 changes the number of times or the number of times of charging, changes once for at least three days battery 4 or for battery 4 charges, battery 4's capacity is not less than 40 AH.
When the contacts of the circuit breaker are switched on and off, the time interval of electric arc reignition between the contacts is short, the response time of the diode 5 is not more than 100ns, the reverse working voltage is not lower than 2kV, and the forward conduction steady-state current is not lower than 10A.
The application provides a circuit breaker arc extinguishing detection device is used for receiving and storing the circuit breaker and produces the electromagnetic wave signal that electric arc arouses, this detection device include shell 1, set up in 1 inside sensor 2, host computer 3, battery 4 of shell and with the diode 5 that shell 1 is connected, 2 receive the electromagnetic wave signal that electric arc arouses of sensor and transmit host computer 3, the information of relevant electric arc and then aassessment circuit breaker arc extinguishing performance in the 3 analysis electromagnetic wave signals of host computer. The high-capacity battery 4 is adopted to stably supply power to the sensor 2 and the host 3, so that the influence caused by the voltage fluctuation of the alternating-current power supply of the power grid is avoided. Add between shell 1 and the ground net diode 5, diode 5's positive pole is connected shell 1, the ground net is connected to diode 5's negative pole, because of electrostatic induction results in on the shell 1 when the shell 1 potential risees, diode 5 forward conduction will charge on the shell 1 is to ground net release, when the ground potential transient state risees, diode 5 reverse cut-off blocks transient state ground potential counterattack, has protected sensor 2 with the normal operating of host computer 3.
The present application has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims.
Claims (7)
1. The detection device is used for receiving and storing electromagnetic wave signals generated by arc excitation of the circuit breaker, and is characterized by comprising a shell (1), a sensor (2) arranged in the shell (1), a host (3), a battery (4) and a diode (5) connected with the shell (1);
the sensor (2) is connected with the host (3), the sensor (2) is used for receiving electromagnetic wave signals and transmitting the electromagnetic wave signals to the host (3), and the host (3) is used for analyzing the electromagnetic wave signals and storing analyzed information;
the battery (4) is a high-capacity direct-current power supply, and the battery (4) is respectively electrically connected with the sensor (2) and the host (3) and used for supplying power to the sensor (2) and the host (3);
the anode of the diode (5) is connected with the shell (1), and the cathode of the diode is connected with a grounding grid.
2. Detection device according to claim 1, characterized in that the sensor (2), the main unit (3) and the battery (4) are fixed inside the casing (1) by means of an insulating support plate (6).
3. The detection device according to claim 2, characterized in that the thickness of the insulating support plate (6) is not lower than 1 cm.
4. Detection device according to claim 1, characterized in that a potentiostat (7) is provided between the battery (4) and the sensor (2).
5. Detection device according to claim 1, characterized in that an inverter (8) is provided between the battery (4) and the main machine (3).
6. A testing device according to claim 1, characterized in that the capacity of the battery (4) is not less than 40 AH.
7. The detection device according to claim 1, wherein the response time of the diode (5) is not more than 100ns, the reverse operating voltage is not lower than 2KV, and the forward conduction steady-state current is not lower than 10A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020513551.9U CN212031669U (en) | 2020-04-09 | 2020-04-09 | Arc extinguishing performance detection device of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020513551.9U CN212031669U (en) | 2020-04-09 | 2020-04-09 | Arc extinguishing performance detection device of circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN212031669U true CN212031669U (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020513551.9U Active CN212031669U (en) | 2020-04-09 | 2020-04-09 | Arc extinguishing performance detection device of circuit breaker |
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| Country | Link |
|---|---|
| CN (1) | CN212031669U (en) |
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2020
- 2020-04-09 CN CN202020513551.9U patent/CN212031669U/en active Active
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