Novel current monitoring device with high safety

Abstract

The utility model relates to the technical field of current monitoring, and discloses a novel current monitoring device with high safety, which comprises a shell, one side of the inner wall of the shell is connected with a circuit board, one side of the circuit board is connected with a detection unit, and the back side of the shell is connected with a direct current power supply. One side of the circuit board is connected with a current sensor, a protection capacitor and an overvoltage protector, the two sides of the shell are connected with connection sockets, and the sides, away from each other, of the connection sockets are connected with a ground wire connection wire and an output end wire respectively. According to the utility model, the voltage of the applied direct current can be boosted to a high-voltage state through the detection unit, the monitoring range is ensured, electronic components are integrated in the shell to form a smaller device, the operation is simple, the carrying is convenient, the operation difficulty of monitoring is effectively reduced, and the monitoring cost is also reduced at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to current monitoring technical field, concretely is a kind of high safety's novel current monitoring device. BACKGROUND

[0002] Lightning arrester is a kind of device for protecting electrical equipment from overvoltage impact, its core function is to absorb or discharge overvoltage energy through its action, so as to protect the system, zinc oxide lightning arrester is the most common type, it presents high resistance state under normal voltage, almost no conduction, when system voltage exceeds the operating voltage of lightning arrester, lightning arrester quickly turns into low resistance state, and discharges overvoltage energy to ground, so as to protect equipment.

[0003] Zinc oxide lightning arrester needs to be detected regularly after a period of use to ensure its reliability and safe operation of power system, detection content includes appearance inspection, electrical performance test and preventive test, specific method such as leakage current test and resistive current analysis, through regular detection, potential problems of lightning arrester can be found in time and corresponding measures are taken, so as to avoid the impact of equipment failure on system.

[0004] The current inspection device is large in size, and needs to be assembled and used between multiple devices during detection, which greatly increases the use difficulty and is inconvenient to carry, and different types of detection devices have different detection operation modes, which increases the complexity and cost of detection.

[0005] The above information disclosed in the background is only used to increase the understanding of the background of the present application, therefore, it can include prior art known by those skilled in the art. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a kind of high safety's novel current monitoring device to solve the problems raised in the above background technology.

[0007] To achieve the above object, the utility model provides the following technical scheme: including shell, the inner wall one side of shell is connected and is provided with circuit board, the one side of circuit board is connected and is provided with detection unit, the back side of shell is connected and is provided with DC power supply, the one side of circuit board is connected and is provided with current sensor, protective capacitor and overvoltage protector, the both sides of shell are connected and are provided with connection socket, the side of connection socket away from each other is connected and is provided with ground wire lead and output terminal lead respectively, the other end of ground wire lead and output terminal lead is connected and is provided with copper clamp.

[0008] Preferably, the current sensor, protective capacitor and overvoltage protector are electrically connected to the detection unit.

[0009] Preferably, the detection unit comprises an oscillator, a single-chip microcomputer, a high-frequency transformer and a voltage boosting unit arranged on the surface of the circuit board, and the oscillator, the single-chip microcomputer, the high-frequency transformer and the voltage boosting unit are electrically connected with the direct current power supply.

[0010] Preferably, the other end of the connecting socket on the side of the ground wire connecting wire is electrically connected with the current sensor.

[0011] Preferably, an analog-to-digital converter is arranged on one side of the circuit board.

[0012] Preferably, the voltage boosting unit is composed of six capacitors and six diodes.

[0013] In summary, the present application has the following beneficial technical effects:

[0014] The voltage of the direct current can be boosted to a high voltage state by the detection unit, so as to ensure the monitoring range, and the electronic components are integrated in the shell to form a small device, so that the operation is simple, the device is convenient to carry, the operation difficulty of monitoring is effectively reduced, and the monitoring cost is also reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole structure schematic view of the novel current monitoring device with high safety.

[0016] Figure 2 It is an internal structure schematic view of the novel current monitoring device with high safety.

[0017] Figure 3 It is a module structure schematic view of the novel current monitoring device with high safety.

[0018] In the figure: 1, shell; 2, circuit board; 3, ground wire connecting wire; 4, output end wire; 5, copper clamp; 6, oscillator; 7, single-chip microcomputer; 8, high-frequency transformer; 9, voltage boosting unit; 10, current sensor; 11, protection capacitor; 12, overvoltage protector; 131, analog-to-digital converter; 14, direct current power supply; 15, connecting socket. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0020] Please refer to Figures 1-3The utility model provides a technical scheme: including casing 1, the inside wall one side of casing 1 is connected with circuit board 2, and the one side of circuit board 2 is connected with detection unit, and the back side of casing 1 is connected with direct current power supply 14, and the one side of circuit board 2 is connected with current sensor 10, protective capacitor 11 and overvoltage protector 12, and the both sides of casing 1 are connected with connection socket 15, and the one side of connection socket 15 is connected with ground wire connecting wire 3 and output terminal wire 4 respectively, and the other end of ground wire connecting wire 3 and output terminal wire 4 is connected with copper clamp 5 respectively, and the one side of circuit board 2 is connected with analog-digital converter 131 corresponding display 13, and analog-digital converter 131 can convert electric signal into the number of display, and supply display 13 to show;

[0021] Referring to Figure 2 As shown in the figure, current sensor 10, protective capacitor 11 and overvoltage protector 12 are electrically connected with detection unit, and current sensor 10 detects the current through the ground wire output end of lightning arrester through ground wire connecting wire 3, protective capacitor 11 is used for electric protection of circuit board 2 as a whole, and overvoltage protector 12 is used for avoiding self-damage when high voltage is generated by protection device.

[0022] Referring to Figure 2 As shown in the figure, detection unit includes oscillator 6, single-chip microcomputer 7, high-frequency transformer 8 and voltage boosting unit 9 installed on the surface of circuit board 2, and oscillator 6, single-chip microcomputer 7, high-frequency transformer 8 and voltage boosting unit 9 are electrically connected with direct current power supply 14, single-chip microcomputer 7 outputs signals of specific frequency through control oscillator 6, wherein the one side of circuit board 2 is also connected with power amplifier and driving circuit, power amplifier is used for amplifying signals to sufficient power level, and driving circuit is responsible for converting weak electric signals of single-chip microcomputer into strong electric signals to meet the input requirements of high-frequency transformer 8, and after being transformed by high-frequency transformer 8, the signals are input into voltage boosting unit 9 for voltage boosting.

[0023] Referring to Figure 2 As shown in the figure, the other end of connection socket 15 on the side of ground wire connecting wire 3 is electrically connected with current sensor 10, and when ground wire connecting wire 3 receives current, the current is transmitted to current sensor 10 for inspection, so as to judge the quality of lightning arrester.

[0024] Referring to Figure 2 As shown in the figure, voltage boosting unit 9 is composed of six capacitors and six diodes, and each diode and capacitor combination is responsible for a voltage doubling stage, and after cascading of six combinations, the final output voltage is six times of input voltage.

[0025] The implementation principle of the application is: when in use, the low voltage is input to the high-frequency transformer 8 through the cooperation of the single-chip microcomputer 7 and the oscillator 6, 5kw voltage is generated, then the voltage is boosted by the voltage boosting unit 9 to generate 30kw voltage, and is transmitted to the lightning arrester through the output end lead wire 4, when the voltage is transmitted to the ground wire through the lightning arrester, the ground wire connected lead wire 3 will receive current, and the current intensity is monitored through the current sensor 10, the device applies direct current, 1mA direct current voltage (U1mA) and 0.75U1mA voltage are applied during operation, the voltage value between the two ends of the lightning arrester is measured under 1mA direct current voltage, the leakage current is measured under 0.75 times U1mA voltage, the aging degree of the lightning arrester is reflected, the voltage is read out when the detection voltage is I=1mA, it is known that U1mA=the voltage at this time, at the same time, the voltage is reduced to the detection voltage I=0.75 times U1mA, at this time, the current is obtained, when the detection current I≥50mA, it is judged that the transformer is damaged.

[0026] It should be noted that, in this document, the terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0027] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A novel current monitoring device with high security, comprising a housing (1), characterized in that: A circuit board (2) is connected to one side of the inner wall of the housing (1). A detection unit is connected to one side of the circuit board (2). A DC power supply (14) is connected to the back of the housing (1). A current sensor (10), a protective capacitor (11), and an overvoltage protector (12) are connected to one side of the circuit board (2). A connection socket (15) is connected to both sides of the housing (1). A ground wire (3) and an output wire (4) are respectively connected to the opposite side of the connection socket (15). A copper clip (5) is connected to the other end of the ground wire (3) and the output wire (4).

2. The novel high-safety current monitoring device according to claim 1, characterized in that: The current sensor (10), the protective capacitor (11), and the overvoltage protector (12) are electrically connected to the detection unit.

3. The novel high-safety current monitoring device according to claim 1, characterized in that: The detection unit includes an oscillator (6), a microcontroller (7), a high-frequency transformer (8), and a boost unit (9) mounted on the surface of the circuit board (2). The oscillator (6), the microcontroller (7), the high-frequency transformer (8), and the boost unit (9) are electrically connected to the DC power supply (14).

4. The novel high-safety current monitoring device according to claim 1, characterized in that: The other end of the connector (15) located on one side of the ground wire (3) is electrically connected to the current sensor (10).

5. A novel high-safety current monitoring device according to claim 1, characterized in that: An analog-to-digital converter (131) is connected to one side of the circuit board (2).

6. A novel high-safety current monitoring device according to claim 3, characterized in that: The boost unit (9) is composed of six capacitors and six diodes.

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