Open-type dual-function low-power-consumption current sensor

Abstract

The utility model provides an open-type dual-function low-power consumption current sensor, which relates to the technical field of electric power system detection, and comprises two shells and a coil group, the coil group is arranged in the shells, one ends of the two shells are connected in a rotatable manner, the two shells can be opened and closed, and the coil group is arranged in the two shells. A locking device is arranged at the opening and closing position of the two shells, the coil groups are divided into two groups, the two groups of coil groups are respectively arranged in the two shells, non-inductive resistors are respectively arranged in the two shells, and the non-inductive resistors are respectively connected with the close coil groups to form two detection areas. When in use, the two mutually hinged shells are arranged to form a ring body, the coil groups are respectively arranged in the two shells to form a loop, and primary side large current is converted into secondary side small current, so that two induction areas are formed, and the openable and closable shells can achieve the effect of being convenient to mount and dismount during detection.

Description

TECHNICAL FIELD

[0001] The utility model relates to power system detection technical field especially, it relates to a kind of open double function low-power current sensor. BACKGROUND

[0002] Current sensor in practical application, it is directly applied to the current measurement of power system.For example in substation, it can accurately measure the current size in transmission line, provides key data for the operation state monitoring of power grid.Meanwhile it is used for the current detection when electrical equipment in industrial production operates, to guarantee the safe and stable operation of equipment and energy consumption analysis.

[0003] The volume and weight of existing current sensor are usually larger.This is because the core and winding structure of electromagnetic transformer are relatively complex, so it is designed as a whole when designing.The integrated current sensor is inconvenient to install and maintain when installing and maintaining.Especially in some strict space requirement application scenarios, such as compact switch cabinet, installation will be limited.

[0004] Therefore, the application provides an open double function low-power current sensor to improve the convenience of current sensor installation and maintenance. CONTENT OF UTILITY MODEL

[0005] In view of the above-mentioned shortcomings of prior art, the purpose of the utility model is to provide an open double function low-power current sensor to solve the problem of inconvenient maintenance mentioned in prior art.

[0006] To achieve the above-mentioned purpose and other related purposes, the utility model provides an open double function low-power current sensor, which comprises a shell and a coil group, the coil group is installed in the interior of the shell, the number of the shell is two, one end of the two shells is connected in a rotatable manner, and the two shells can be opened and closed, and a locking device is arranged at the opening and closing part of the two shells.

[0007] The coil group is divided into two groups, and the two coil groups are respectively installed in the interior of the two shells.

[0008] Inductor resistance is installed in the interior of the two shells, and the inductor resistance is connected with the adjacent coil group to form two detection zones.

[0009] The two inductor resistances are connected with a connecting cable, and the connecting cable extends to the outside of the shell.

[0010] Preferably, the interior of the shell is provided with anti-interference filler, and the anti-interference filler separates the coil group and the inductor resistance.

[0011] Preferably, the coil group comprises a current coil and an electromagnetic core, and the current coil is wound on the outer surface of the electromagnetic core to form an electromagnetic induction area.

[0012] Preferably, the electromagnetic core is made of a combination of silicon steel material and amorphous material.

[0013] Preferably, the locking device is a locking buckle and a locking tongue or a steel band.

[0014] Preferably, the locking buckle and the locking tongue are respectively arranged at the openings of the two housings, and the locking buckle and the locking tongue are locked with each other.

[0015] Preferably, the steel band surrounds the outer surfaces of the two housings, and the two ends of the steel band are locked with each other to fix the two housings.

[0016] Preferably, the abutting surface of the two housings is provided with an openable sealing cover.

[0017] Preferably, the abutting surface of the two housings is provided with a flexible film, and the flexible film covers the joint of the sealing cover of the housing.

[0018] The inner wall of the flexible film is provided with anti-skid lines.

[0019] Preferably, the outer surface of the housing is provided with an indication mark.

[0020] As described above, the open double-function low-power-consumption current sensor has the following beneficial effects:

[0021] 1、The utility model discloses a ring body formed by two mutually hinged housings, and a coil group is arranged in the inside of each housing to form a loop, which converts a primary large current into a secondary small current, thereby forming two induction areas, and the openable and closable housings can facilitate installation and disassembly.

[0022] Meanwhile, the two induction areas formed by the two housings can realize double detection of the line, and compared with a single loop, more accurate detection data can be obtained by comparing the detection data of two times, thereby improving the accuracy.

[0023] 2、The utility model discloses an anti-interference filler arranged in the inside of the housing, which isolates the coil group from the non-inductive resistor and isolates the coil group from the outside of the housing, thereby reducing the electromagnetic interference between the coil group and the non-inductive resistor and external interference, and achieving strong anti-interference capability.

[0024] Meanwhile, the anti-interference filler can effectively protect the coil group and the non-inductive resistor, thereby enabling the equipment to be used in severe cold and humid environments.

[0025] 3. The utility model discloses a seal cover is arranged on the abutment surface of two housings, and the internal components of the housing can be conveniently disassembled and maintained by opening the seal cover.

[0026] Meanwhile, the flexible film is arranged on the seal cover to seal the gap of the seal cover, so that the waterproof property of the housing is improved.

[0027] Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The structure schematic diagram of the utility model is shown.

[0029] Figure 2 The structure schematic diagram of the utility model in the unfolded state is shown.

[0030] Figure 3 The structure sectional view of the utility model is shown.

[0031] Figure 4 The circuit diagram of the structure of the utility model is shown.

[0032] Element number explanation

[0033] 1, housing, 2, anti-interference filler, 3, non-inductive resistance, 4, locking fastener, 5, current coil, 6, electromagnet core, 7, locking tongue piece, 8, connecting cable, 9, flexible film, 10, indication mark. DETAILED DESCRIPTION

[0034] The implementation of the utility model is described below by specific embodiments, and other advantages and effects of the utility model can be easily understood by those skilled in the art from the content disclosed in the specification.

[0035] Please refer to Figures 1 to 4 It should be understood that the structure, proportion, size, etc. shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and are not used to limit the limiting conditions of the implementation of the utility model, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the specification are only for the convenience of clear understanding of the description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of the relative relationship, without substantially changing the technical content, is also regarded as the scope of the implementation of the utility model.

[0036] As Figures 1-4 shown, the utility model provides a kind of open double function low-power consumption current sensor, including insulating shell 1 and coil group. Coil group is installed in the inside of shell 1, forms loop. Specifically, secondary winding is connected integrated component Ra, therefore, its secondary output is voltage signal. Voltage drop U s It is proportional to primary flow and in phase. The number of shell 1 is two, and one end of the two shell 1 is rotatably connected, can be articulated using rotating shaft, so that the opening and closing between the two shell 1 can be realized, and the cable to be measured is clamped between the two shell 1. When installing and disassembling, it can be realized by opening the opening of the two shell 1, improving the convenience. The opening and closing of the two shell 1 is provided with locking device, for closing the opening of the two shell 1, so that the whole equipment can be stably installed on the cable.

[0037] Coil group is divided into two groups, and the two coil groups are installed in the inside of the two shell 1 respectively. In the circuit, low-temperature drift non-inductive metal film resistor is used to output voltage small signal in parallel, and the temperature drift coefficient is small. When working at 25 DEG C to + 75 DEG C outdoors, the product error range is unchanged. Non-inductive resistor 3 is installed in the inside of the two shell 1. The non-inductive resistor 3 is connected with the adjacent coil group respectively, forming two detection zones. By comparing and correcting the values of the two zones, more accurate detection data can be obtained.

[0038] The two non-inductive resistors 3 are commonly connected with connecting cable 8 for transmitting the current of the loop to the measuring equipment for value measurement. The connecting cable 8 extends to the outside of the shell 1, and the end of the connecting cable 8 is connected with an aviation plug for connecting with external equipment. The connecting cable 8 is a shielded wire, which uses shielded twisted pair output, and has strong anti-interference ability and high product precision.

[0039] In some embodiments, as Figure 3 shown, the inside of the shell 1 is provided with anti-interference filler 2, which is generally made of epoxy resin. The anti-interference filler 2 forms a fixing seat with the cross section inside the shell 1, which separates the coil group from the non-inductive resistor 3. Moreover, the anti-interference filler 2 also isolates the coil group from the outside of the shell 1, thereby reducing the electromagnetic interference between the coil group and the non-inductive resistor 3 and external interference, achieving the effect of strong anti-interference ability.

[0040] At the same time, the anti-interference filler 2 can effectively protect the coil group and the non-inductive resistor 3, avoid the loosening and short circuit of components. Moreover, the device can be used in cold and humid environment. In order to reduce the interference of the anti-interference filler 2 to the coil group, the coil group is arranged on the side close to the contact between the shell 1 and the cable, improving the detection sensitivity.

[0041] Some embodiments, as shown in Figure 3 The utility model coil group includes current coil 5 and electromagnet core 6, and current coil 5 is wound on the outer surface of electromagnet core 6 to form an electromagnetic induction area.

[0042] Specifically, the electromagnet core 6 is composed of silicon steel material and amorphous material, which is used to improve the magnetic conductivity of the core and reduce power consumption. Materials with high magnetic permeability, such as permalloy and ferrite, can improve the sensitivity and linearity of the sensor. Doping amorphous material can improve the strength and achieve the effect of protection and measurement.

[0043] Some embodiments, as shown in Figure 1 The utility model locking device is locking fastener 4 and locking tongue piece 7 matched with each other, or steel band. Using locking fastener 4 and locking tongue piece 7 to cooperate to fix, can realize more convenient disassembly, and using steel band to connect can realize more firm and stable fixation.

[0044] Some embodiments, as shown in Figure 2 The locking fastener 4 and the locking tongue piece 7 are installed at the openings of the two housings 1 respectively, and the locking fastener 4 and the locking tongue piece 7 are locked with each other. The specific principle is that the locking tongue piece 7 is pressed into the middle of the locking fastener 4, and the locking fastener 4 fixes the locking tongue piece 7 through pressure and / or a clasp, so as to achieve the purpose of locking, which has the effect of convenient operation. For specific structure, please refer to existing technologies such as luggage buckles.

[0045] Some embodiments, the steel band surrounds the outer surfaces of the two housings 1, and the two ends of the steel band are locked with each other to fix the two housings 1. In operation, this structure is relatively troublesome compared with the above technical solution. However, the connection mode is not easy to disassemble, so it has better stability and firmness.

[0046] Some embodiments, the utility model is provided with an openable sealing cover on the surface of the two housings 1 that abut against each other. After opening the sealing cover, the components inside the housing 1 can be taken out conveniently, so that convenient maintenance can be realized.

[0047] Some embodiments, as shown in Figure 1 and Figure 2 The utility model is provided with a flexible film 9 on the surface of the two housings 1 that abut against each other. The flexible film 9 covers the joint of the sealing cover of the housing 1, which is used to prevent water and moisture from contacting, so as to have good performance in extreme weather and terrain. The inner wall of the flexible film 9 is provided with anti-skid lines, which are shallow lines used to improve the friction between the housing 1 and the cable. The shallow lines can maximize the reduction of the gap between the housing 1 and the cable, and improve the detection accuracy.

[0048] In some embodiments, as shown in Figure 1 and Figure 2 The utility model discloses an outer surface of shell 1 is provided with indicating mark 10, and the indicating direction of indicating mark 10 is same with the current direction, when using, can install according to the indication of indicating mark 10, make the measurement direction and the current direction consistent, improve the convenience of installation.

[0049] The use performance test is as follows:

[0050] Operating temperature -40℃∽+70℃ Altitude Under 1000 m Relative humidity The average value of the relative humidity measured over 24 hours must not exceed 95%

[0051] In conclusion, the open type double-function low-power-consumption current sensor is characterized in that two mutually hinged shells 1 form a ring body, and a coil group is arranged in each shell 1 to form a loop, a primary large current is converted into a secondary small current, thereby forming two sensing areas, and the openable and closable shell 1 can be conveniently installed and disassembled.

[0052] Meanwhile, the two sensing areas formed by the two shells 1 can realize double detection of the line, compared with a single loop, more accurate detection data can be obtained by comparing the detection data of two times, and the accuracy is improved.

[0053] The anti-interference filler 2 is arranged in the shell 1 to isolate the coil group from the non-inductive resistor 3 and isolate the coil group from the outside of the shell 1, thereby reducing the electromagnetic interference between the coil group and the non-inductive resistor 3 and external interference, and the anti-interference ability is strong.

[0054] Meanwhile, the anti-interference filler 2 can also effectively protect the coil group and the non-inductive resistor 3, so that the equipment can be used in cold and humid environments.

[0055] The sealable sealing cover is arranged on the abutting surface of the two shells 1, and the internal components of the shell 1 can be conveniently disassembled and maintained by opening the sealing cover.

[0056] Meanwhile, the flexible film 9 is arranged on the sealing cover to seal the gap of the sealing cover, so as to improve the waterproofness of the shell 1.

[0057] Therefore, the utility model effectively overcomes the shortcomings in the prior art and has high industrial utilization value.

[0058] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. An open-type dual-function low-power current sensor, comprising a housing (1) and a coil assembly, wherein the coil assembly is mounted inside the housing (1), and characterized in that: There are two shells (1), one end of the two shells (1) is connected in a rotatable manner, and the two shells (1) can be opened and closed, and a locking device is provided at the opening and closing position of the two shells (1); The coil group is divided into two groups, and the two groups of coil groups are respectively installed inside two housings (1); Non-inductive resistors (3) are installed inside the two housings (1), and the non-inductive resistors (3) are respectively connected to adjacent coil groups to form two detection areas; The two non-inductive resistors (3) are commonly connected to a connecting cable (8), and the connecting cable (8) extends to the outside of the housing (1).

2. The open-type dual-function low-power current sensor according to claim 1, characterized in that: An anti-interference filler (2) is provided inside the housing (1), and the anti-interference filler (2) separates the coil group from the non-inductive resistor (3).

3. The open-type dual-function low-power current sensor according to claim 1, characterized in that: The coil assembly comprises a current coil (5) and an electromagnetic core (6), wherein the current coil (5) is wound around the outer surface of the electromagnetic core (6) to form an electromagnetic induction area.

4. The open-type dual-function low-power current sensor according to claim 3, characterized in that: The electromagnetic core (6) is made of a combination of silicon steel material and amorphous material.

5. The open-type dual-function low-power current sensor according to claim 1, characterized in that: The locking device is a locking fastener (4) and a locking tongue (7) that cooperate with each other, or a steel belt.

6. The open-type dual-function low-power current sensor according to claim 5, characterized in that: The locking fastener (4) and the locking tongue (7) are respectively installed at the openings of the two shells (1), and the locking fastener (4) and the locking tongue (7) are locked with each other.

7. The open-type dual-function low-power current sensor according to claim 5, characterized in that: The steel belt surrounds the outer surfaces of the two outer shells (1), and the two ends of the steel belt are contracted and locked with each other to fix the two outer shells (1).

8. The open-type dual-function low-power current sensor according to claim 1, characterized in that: The surfaces of the two shells (1) that contact each other are provided with an openable sealing cover.

9. The open-type dual-function low-power current sensor according to claim 8, characterized in that: A flexible film (9) is provided on one side of the two shells (1) that are in contact with each other, and the flexible film (9) covers the joint of the sealing cover of the shell (1); The inner wall of the flexible film (9) is provided with anti-slip grooves.

10. The open-type dual-function low-power current sensor according to any one of claims 1 to 9, characterized in that: An indicator mark (10) is provided on the outer surface of the housing (1).

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