An insulation detection device

Abstract

The application discloses an insulation detection device for detecting the insulation performance between the iron core, the clamp and the oil tank of a transformer oil tank, comprising a connecting part, a detection part and a fixing part, wherein the connecting part is used for electrically connecting with the grounding lead-out wire of the iron core or the clamp; the detection part is arranged outside the oil tank and is electrically connected with the connecting part, and is used for connecting an external power supply; and the fixing part is fixedly connected with the connecting part and is fixedly connected with the grounding sleeve mounting flange on the oil tank through a fastener, and is insulated from the connecting part and the detection part. The insulation detection device disclosed by the application electrically connects the grounding lead-out wires of the iron core and the clamp with two detection parts respectively, and electrically connects the oil tank with the fixing part, applies voltage between the corresponding detection part of the iron core, the corresponding detection part of the clamp and the corresponding fixing part in pairs, detects the resistance between the iron core, the clamp and the oil tank in pairs, and judges the insulation performance, so that the purpose of replacing the grounding sleeve to perform insulation detection is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer electrical equipment detection, and particularly relates to an insulation detection device. BACKGROUND

[0002] In transformer electrical equipment, the insulation performance between the iron core, the clamp and the oil tank is an important performance index of the product. In the transformer electrical equipment, a grounding bushing is usually used to connect the outgoing lines of the iron core and the clamp, and the insulation performance is detected by applying voltage between the iron core, the clamp and the oil tank and detecting the resistance, as shown in the prior art. Figure 1 In the prior art, two sets of grounding bushings 1 are respectively fixedly connected to the grounding bushing mounting flanges 4 on the oil tank 3 through fasteners 2, the bottoms of the two sets of grounding bushings 1 are respectively connected to the iron core grounding lead 5 and the clamp grounding lead 6, and the insulation performance between the iron core and the clamp is detected by connecting the two ends of an external power supply to the tops of the two sets of grounding bushings 1, and the insulation performance between the iron core or the clamp and the oil tank 3 is detected by connecting the external power supply to the top of one set of grounding bushings 1 and the fastener 2 of the grounding bushing mounting flange 4.

[0003] Because the transformer electrical equipment has a long storage time from production to use, and a long transportation process is required for use, in order to avoid damage to the grounding bushing, the grounding bushing is generally not installed, and a cover plate is used to seal the flange opening of the mounting position. However, in the storage and transportation process of the transformer electrical equipment, in order to prevent internal parts from being displaced and insulation from being dampened during the storage and transportation process, the insulation performance between the iron core, the clamp and the oil tank needs to be detected regularly.

[0004] Therefore, how to provide a device to replace the grounding bushing to detect the insulation performance between the iron core, the clamp and the oil tank during the storage and transportation of the transformer is a technical problem that needs to be solved by those skilled in the art. SUMMARY

[0005] Therefore, how to provide a device to replace the grounding bushing to detect the insulation performance between the iron core, the clamp and the oil tank during the storage and transportation of the transformer is a technical problem that needs to be solved by those skilled in the art.

[0006] To achieve the above object, the present application provides the following technical scheme.

[0007] An insulation detection device for detecting the insulation performance between the iron core, the clamp and the oil tank of a transformer oil tank, comprising:

[0008] a connecting portion for electrically connecting to the grounding outgoing line of the iron core or the clamp.

[0009] a detection part, which is arranged outside the oil tank and is electrically connected with the connecting part, and is used to connect an external power supply;

[0010] a fixing part, which is fixedly connected with the connecting part, is fixedly connected with a grounding sleeve mounting flange on the oil tank by a fastener, and is insulated from the connecting part and the detection part.

[0011] Preferably, in the insulation detection device, the connecting part and the detection part are integrally arranged, the connecting part and the detection part are assembled to press the fixing part, and insulation is achieved between the fixing part, the connecting part and the detection part by arranging an insulating part.

[0012] Preferably, in the insulation detection device, the detection part is provided with an upper pressing plate, the connecting part is provided with a lower pressing plate, the fixing part is provided with a connecting hole, the area of the upper pressing plate and the lower pressing plate is greater than that of the connecting hole, the detection part and the connecting part are assembled by a assembling part passing through the connecting hole, and the upper pressing plate and the lower pressing plate press the fixing part.

[0013] Preferably, in the insulation detection device, the assembling part includes a first assembling part and a second assembling part which are screw-connected, the first assembling part is arranged on the connecting part, the second assembling part is arranged on the detection part, and the first assembling part and the second assembling part are screw-connected through the connecting hole.

[0014] Preferably, in the insulation detection device, the insulating part includes an insulating sleeve and an insulating sealing part, the insulating sleeve is sleeved on the outer surface of the assembling part, when the assembling part is assembled through the connecting hole, the insulating sleeve passes through the connecting hole and extends out of the connecting hole at both ends, the insulating sealing part is sleeved on the area of the insulating sleeve extending out of the connecting hole at both ends, and the upper pressing plate and the lower pressing plate press the fixing part by pressing the insulating sealing part.

[0015] Preferably, in the insulation detection device, the height of the insulating sleeve is greater than the distance between the upper pressing plate and the lower pressing plate in the limit pressing state.

[0016] Preferably, in the insulation detection device, the connecting part and the detection part are integrally arranged, the outer surface of the connecting part and the outer surface of the detection part are both insulating housings, and the fixing part is arranged outside the insulating housings.

[0017] Preferably, in the insulation detection device, one end of the grounding lead of the iron core or the clamp is electrically connected with a screw rod, the connecting part is provided with a threaded hole, and the threaded hole is threadedly connected with the screw rod to realize the electrical connection between the connecting part and the grounding lead of the iron core or the clamp.

[0018] Preferably, in the insulation detection device, a detection hole is formed at the top of the detection part to connect an external power supply.

[0019] Preferably, in the insulation detection device, the detection part is in a stepped shape, and the width of the top of the detection part is smaller than the width of the bottom.

[0020] As can be seen from the above technical solutions, the insulation detection device provided by the application is electrically connected with the grounding lead of the iron core or the clamp through the connecting part, so as to lead the grounding lead of the iron core or the clamp out of the oil tank, so as to facilitate the external power supply to apply voltage, and the detection part electrically connected with the connecting part is arranged to connect the external power supply; the fixing part is fixedly connected with the connecting part to fix the grounding lead of the iron core or the clamp, and the fixing part is fixedly connected with the grounding sleeve mounting flange on the oil tank through the fastener, when the fixing part is fixedly connected with the grounding sleeve mounting flange on the oil tank through the fastener, the fixing part is electrically connected with the oil tank, and meanwhile, the fixing part is insulated from the connecting part and the detection part. The insulation detection device provided by the application leads the grounding lead of the iron core or the clamp out of the oil tank through the connecting part and the detection part, so as to facilitate the connection of the external power supply, and the fixing part fixedly connected with the connecting part is fixedly connected with the grounding sleeve mounting flange on the oil tank, so that the fixing part is electrically connected with the oil tank, when the insulation performance between the iron core and the oil tank needs to be detected, the connecting part of the insulation detection device provided by the application is electrically connected with the grounding lead of the iron core, and the fixing part is fixedly connected with the grounding sleeve mounting flange corresponding to the iron core, and the two ends of the external power supply are connected between the detection part and the fixing part, so as to detect the resistance between the iron core and the oil tank and judge the insulation performance.

[0021] Similarly, when the insulation performance between the clamp and the oil tank needs to be detected, the connecting part of the insulation detection device provided by the application is electrically connected with the grounding lead of the clamp, and the fixing part is fixedly connected with the grounding sleeve mounting flange corresponding to the clamp, and the two ends of the external power supply are connected between the detection part and the fixing part, so as to detect the resistance between the clamp and the oil tank and judge the insulation performance.

[0022] When the insulation performance between the iron core and the clamp needs to be detected, the connecting parts of two sets of the insulation detection device provided by the application are respectively electrically connected with the grounding lead-out wires of the iron core and the clamp, and the two ends of the external power supply are respectively connected with the detection parts of the two sets of the insulation detection device, so that the resistance between the iron core and the clamp can be detected, and the insulation performance can be judged. The insulation detection device provided by the application can detect the resistance between the iron core, the clamp and the oil tank two by two, and judge the insulation performance, so that the purpose of replacing the grounding sleeve for insulation detection in the process of transformer storage and transportation is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0024] Figure 1 It is a schematic view of the grounding sleeve structure in the prior art.

[0025] Figure 2 It is a schematic view of the insulation detection device structure provided by the embodiment of the application.

[0026] Figure 3 It is a schematic view of the insulation detection device installation provided by the embodiment of the application.

[0027] Figure 4 It is a side view of the detection part provided by the embodiment of the application.

[0028] Figure 5 It is a schematic view of the connecting part provided by the embodiment of the application.

[0029] Figure 6 It is a schematic view of the fixing part provided by the embodiment of the application.

[0030] Figure 7 It is a schematic view of the insulation sleeve provided by the embodiment of the application.

[0031] Figure 8 It is a schematic view of the insulation sealing member provided by the embodiment of the application.

[0032] In the drawings, 10 is the connecting part, 110 is the threaded hole, 120 is the lower pressing plate, 130 is the first assembly part, 20 is the detection part, 210 is the detection hole, 220 is the upper pressing plate, 230 is the second assembly part, 30 is the fixing part, 310 is the connecting hole, 40 is the fastener, 50 is the insulation sleeve, 60 is the insulation sealing member, 1 is the grounding sleeve, 2 is the fastener, 3 is the oil tank, 4 is the grounding sleeve mounting flange, 5 is the iron core grounding lead-out wire, and 6 is the clamp grounding lead-out wire. DETAILED DESCRIPTION

[0033] The core of the present application is to disclose an insulation detection device, which realizes the purpose of detecting the insulation performance between components of transformer products at any time.

[0034] In order for those skilled in the art to better understand the present application, the embodiments of the present application are described below with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the invention described in the claims in any way. In addition, all the contents represented by the following embodiments are not limited to the solutions necessary for the invention described in the claims.

[0035] As shown in Figure 2 and Figure 3 The insulation detection device provided by the present application is provided with a connecting part 10 electrically connected with the grounding lead-out wire of the core or the clamp, the connecting part 10 is used to lead out the grounding lead-out wire of the core or the clamp from the oil tank, so as to apply voltage by the external power supply, and a detection part 20 electrically connected with the connecting part 10 is arranged, that is, the detection part 20 is electrically connected with the grounding lead-out wire of the core or the clamp, and the detection part 20 can be used as an external power supply detection connection point for detecting the resistance of the core or the clamp; a fixing part 30 is arranged, the fixing part 30 is fixedly connected with the connecting part 10 to fix the grounding lead-out wire of the core or the clamp, and the fixing part 30 can be fixedly connected with the grounding sleeve mounting flange on the oil tank by the fastener 40, when the fixing part 30 is fixedly connected with the grounding sleeve mounting flange on the oil tank by the fastener 40, the fixing part 30 is electrically connected with the oil tank, and at the same time, the fixing part 30 is insulated from the connecting part 10 and the detection part 20, since the fixing part 30 is electrically connected with the oil tank, the fixing part 30 can be used as an external power supply detection connection point for detecting the resistance of the oil tank, and the insulation between the fixing part 30, the connecting part 10 and the detection part 20 can ensure that the external power supply will not be conducted with the connecting part 10 or the detection part 20 to cause short circuit when the fixing part 30 is connected.

[0036] The insulation detection device provided by the application is characterized in that: a connecting part 10 is arranged to be electrically connected with the grounding lead-out wire of the iron core or the clamp, so as to lead out the grounding lead-out wire of the iron core or the clamp from the oil tank, and facilitate the external power supply to apply voltage; a detection part 20 electrically connected with the connecting part 10 is arranged to be connected with the external power supply; a fixing part 30 fixedly connected with the connecting part 10 is arranged to fix the grounding lead-out wire of the iron core or the clamp, and the fixing part 30 can be fixedly connected with the grounding sleeve mounting flange on the oil tank through a fastener 40; when the fixing part 30 is fixedly connected with the grounding sleeve mounting flange on the oil tank through the fastener 40, the fixing part 30 is electrically connected with the oil tank, and the fixing part 30 is insulated from the connecting part 10 and the detection part 20.

[0037] When the insulation performance between the iron core and the oil tank needs to be detected, the connecting part 10 of the insulation detection device is electrically connected with the grounding lead-out wire of the iron core, and the fixing part 30 is fixedly connected with the grounding sleeve mounting flange corresponding to the iron core, and then the two ends of the external power supply are connected between the detection part 20 and the fixing part 30, so that the resistance between the iron core and the oil tank can be detected, and the insulation performance can be judged.

[0038] Similarly, when the insulation performance between the clamp and the oil tank needs to be detected, the connecting part 10 of the insulation detection device is electrically connected with the grounding lead-out wire of the clamp, and the fixing part 30 is fixedly connected with the grounding sleeve mounting flange corresponding to the clamp, and then the two ends of the external power supply are connected between the detection part 20 and the fixing part 30, so that the resistance between the clamp and the oil tank can be detected, and the insulation performance can be judged.

[0039] When the insulation performance between the iron core and the clamp needs to be detected, the connecting parts 10 of two sets of the insulation detection device are respectively electrically connected with the grounding lead-out wires of the iron core and the clamp, and then the two ends of the external power supply are connected between the detection parts 20 of the two sets of the insulation detection device, so that the resistance between the iron core and the clamp can be detected, and the insulation performance can be judged. As can be seen from the above embodiments, the insulation detection device provided by the application can detect the resistance between the iron core, the clamp and the oil tank, and judge the insulation performance, so as to realize the purpose of replacing the grounding sleeve to detect the insulation during the storage and transportation of the transformer.

[0040] It should be noted that when the fastener 40 is made of conductive material, the connection point of the external power supply connected with the fixing part 30 can be connected with the fastener 40 for detection, and the fastener 40 is more convenient for the clamping connection of the external power supply than the fixing part 30.

[0041] Further, as shown in Figure 4 and Figure 5 , in the insulation detection device provided by the present application, the connecting part 10 and the detection part 20 are separately arranged, the connecting part 10 and the detection part 20 can be fixedly connected by assembling and pressing the fixing part 30, it should be noted that the separately arranged connecting part 10 and detection part 20 can be disassembled to facilitate the installation of the fixing part 30, at the same time, the fixing part 30 is insulated from the connecting part 10 and the detection part 20 by arranging the insulating part.

[0042] In order to further optimize the above technical solutions, as shown in Figure 4 , Figure 5 and Figure 6 , in the detection device provided by the present application, the detection part 20 is provided with an upper pressing plate 220, the connecting part 10 is provided with a lower pressing plate 120, the fixing part 30 is provided with a connecting hole 310, and the detection part 20 and the connecting part 10 are assembled and connected by the assembling part passing through the connecting hole 310, wherein the areas of the upper pressing plate 220 and the lower pressing plate 120 are greater than the connecting hole 310, so as to ensure that the upper pressing plate 220 and the lower pressing plate 120 will not pass through the connecting hole 310, thereby making the detection part 20 and the connecting part 10 assembled and connected at both ends of the connecting hole 310, and when the detection part 20 and the connecting part 10 are assembled and connected by the assembling part passing through the connecting hole 310, the upper pressing plate 220 and the lower pressing plate 120 can press the fixing part 30, so as to ensure the integrated structure of the insulation detection device.

[0043] In order to further optimize the above technical solutions, in a specific embodiment of the present application, as shown in Figure 4 and Figure 5 , the assembling part includes a first assembling part 130 and a second assembling part 230 which are screw-connected, the first assembling part 130 is arranged on the connecting part 10, the second assembling part 230 is arranged on the detection part 20, the cross-sectional areas of the first assembling part 130 and the second assembling part 230 are smaller than the connecting hole 310, so that the first assembling part 130 and the second assembling part 230 can pass through the connecting hole 310 to be screw-connected, when the first assembling part 130 and the second assembling part 230 pass through the connecting hole 310 to be screw-connected, the upper pressing plate 220 and the lower pressing plate 120 press the fixing part 30, and the insulation device is fixedly connected as an integrated structure.

[0044] It should be noted that the assembling part can also be realized by the structure of the clamping part arranged on the connecting part 10 and the detection part 20.

[0045] In order to further optimize the above technical solutions, as shown in Figure 7 and Figure 8 , in the detection device provided by the present application, the detection part 20 is provided with an upper pressing plate 220, the connecting part 10 is provided with a lower pressing plate 120, the fixing part 30 is provided with a connecting hole 310, and the detection part 20 and the connecting part 10 are assembled and connected by the assembling part passing through the connecting hole 310, wherein the areas of the upper pressing plate 220 and the lower pressing plate 120 are greater than the connecting hole 310, so as to ensure that the upper pressing plate 220 and the lower pressing plate 120 will not pass through the connecting hole 310, thereby making the detection part 20 and the connecting part 10 assembled and connected at both ends of the connecting hole 310, and when the detection part 20 and the connecting part 10 are assembled and connected by the assembling part passing through the connecting hole 310, the upper pressing plate 220 and the lower pressing plate 120 can press the fixing part 30, so as to ensure the integrated structure of the insulation detection device.As shown, in a specific embodiment of the present application, the insulation between the fixing part 30 and the connecting part 10 and the detecting part 20 is achieved by setting an insulation part, which includes an insulation sleeve 50 and an insulation sealing part 60. The insulation sleeve 50 is sleeved on the outer surface of the assembling part, and when the assembling part is assembled through the connecting hole 310, the insulation sleeve 50 passes through the connecting hole 310 and extends out of the connecting hole 310 at both ends, so as to ensure the insulation between the inner circumference of the connecting hole 310 of the fixing part 30 and the assembling part. Meanwhile, the insulation sealing part 60 is sleeved on the area where the insulation sleeve 50 extends out of the connecting hole 310 at both ends. When the upper pressing plate 220 and the lower pressing plate 120 press the fixing part 30, the insulation sealing part 60 is between the upper pressing plate 220 and the fixing part 30, and the insulation sealing part 60 is also between the lower pressing plate 120 and the fixing part 30. The upper pressing plate 220 and the lower pressing plate 120 press the fixing part 30 by pressing the insulation sealing part 60, and the insulation between the upper and lower sides of the fixing part 30 and the connecting part 10 and the detecting part 20 is achieved.

[0046] It should be noted that, since the transformer product is usually transported by air or oil filling during transportation, the product needs to be sealed to meet the pressure maintaining requirement during transportation and storage. The insulation sealing part 60 can further ensure the sealing of the oil tank flange connection to meet the transportation requirement of the oil tank while achieving the insulation function.

[0047] Further, in order to ensure that the upper pressing plate 220 and the lower pressing plate 120 can press the fixing part 30, the height of the insulation sleeve 50 is greater than the distance between the upper pressing plate 220 and the lower pressing plate 120 in the limit pressing state, that is, the upper pressing plate 220 and the lower pressing plate 120 will contact the insulation sleeve 50 during the assembly and pressing to the limit position. The upper pressing plate 220 and the lower pressing plate 120 press the insulation sealing part 60 and the fixing part 30 by moderate pressing.

[0048] Further, in another specific embodiment of the present application, the connecting part 10 and the detecting part 20 of the insulation detection device are integrated structure, which is convenient for storage, transportation and installation. The fixing part 30 is fixedly connected with the connecting part 10 through the ceramic bolt and the insulation gasket. Meanwhile, the shells of the connecting part 10 and the detecting part 20 are insulation shells, and the fixing part 30 is insulated when contacting the shells of the integrated connecting part 10 and the detecting part 20.

[0049] Further, in another specific embodiment of the present application, the grounding lead of the iron core or the clamping piece is electrically connected with a screw rod at one end. The connecting part 10 is internally provided with a threaded hole 110 at one end, and the threaded hole 110 is threadedly connected with the screw rod, which can fix the position of the grounding lead of the iron core or the clamping piece and achieve the electrical connection between the connecting part 10 and the grounding lead of the iron core or the clamping piece.

[0050] Further, as shown in FIG. 6, the connecting part 10 is provided with a plurality of connecting holes 310, and the fixing part 30 is provided with a plurality of connecting holes 310 corresponding to the connecting holes 310 of the connecting part 10. The connecting holes 310 of the connecting part 10 and the connecting holes 310 of the fixing part 30 are arranged in a one-to-one correspondence, and the connecting holes 310 of the connecting part 10 and the connecting holes 310 of the fixing part 30 are arranged in a staggered manner. Figure 2As shown, in order to facilitate the connection of the detection part 20 and the external power supply, a detection hole 210 is also provided on the top of the detection part 20, one end of the external power supply can be clamped or passed through the detection hole 210 to apply voltage for insulation detection.

[0051] Further, as Figure 4 shown, in a specific embodiment of the present application, the detection part 20 is stepped, the width of the top of the detection part 20 is smaller than the width of the bottom, the smaller width of the top of the detection part 20 can facilitate the clamping of the external power supply for insulation detection.

[0052] The terms "first" and "second" and the like in the description and claims of the present application and above drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. The terms "including" and / or "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or apparatus that comprises a list of steps or units are not necessarily limited to those listed steps or units but can include additional steps or units not expressly listed or other steps or units of the same nature as those listed herein.

[0053] The above description of disclosed embodiments of the application allows a person skilled in the art to implement or use the application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An insulation testing device for detecting the insulation performance between the core, clamps, and tank components of a transformer during storage and transportation, characterized in that, include: Connection part (10), the connection part (10) is used for electrical connection with the grounding lead of the iron core or clamp; The detection unit (20) is located outside the oil tank and is electrically connected to the connection unit (10). The detection unit (20) is used to connect to an external power source to apply voltage for insulation detection. The fixing part (30) is fixedly connected to the connecting part (10). The fixing part (30) is fixedly connected to the grounding bushing mounting flange on the oil tank by fasteners (40). The fixing part (30) is insulated from the connecting part (10) and the detection part (20). The fasteners (40) are made of conductive materials. The fixing part (30) is electrically connected to the oil tank through the fastener (40), so that during testing, the two ends of the external power supply can be connected to the testing part (20) and the fixing part (30) respectively to measure the resistance between the iron core or clamp and the oil tank.

2. The insulation testing device as described in claim 1, characterized in that, The connecting part (10) and the detection part (20) are separately provided. The connecting part (10) and the detection part (20) are assembled and pressed together with the fixing part (30). The fixing part (30) is insulated from the connecting part (10) and the detection part (20) by providing an insulating member.

3. The insulation testing device as described in claim 2, characterized in that, The detection part (20) is provided with an upper pressure plate (220), the connecting part (10) is provided with a lower pressure plate (120), and the fixing part (30) is provided with a connecting hole (310). The areas of the upper pressure plate (220) and the lower pressure plate (120) are both larger than the connecting hole (310). The detection part (20) and the connecting part (10) are assembled and connected by an assembly part passing through the connecting hole (310). The upper pressure plate (220) and the lower pressure plate (120) press the fixing part (30) tightly.

4. The insulation testing device as described in claim 3, characterized in that, The assembly part includes a first assembly part (130) and a second assembly part (230) with threaded engagement. The first assembly part (130) is disposed on the connecting part (10), and the second assembly part (230) is disposed on the detection part (20). The first assembly part (130) and the second assembly part (230) are threadedly connected through the connecting hole (310).

5. The insulation testing device as described in claim 4, characterized in that, The insulating component includes an insulating sleeve (50) and an insulating seal (60). The insulating sleeve (50) is fitted onto the outer surface of the assembly part. When the assembly part is assembled through the connecting hole (310), the insulating sleeve (50) passes through the connecting hole (310) and extends out of the connecting hole (310) at both ends. The insulating seal (60) is fitted onto the areas where the insulating sleeve (50) extends out of the connecting hole (310) at both ends. The upper pressure plate (220) and the lower pressure plate (120) press the insulating seal (60) to press the fixing part (30).

6. The insulation testing device as described in claim 5, characterized in that, The height of the insulating sleeve (50) is greater than the distance between the upper pressure plate (220) and the lower pressure plate (120) when they are in the ultimate compression state.

7. The insulation testing device as described in claim 1, characterized in that, The connecting part (10) and the detection part (20) are an integral structure. The outer surfaces of the connecting part (10) and the detection part (20) are both insulating shells. The fixing part (30) is located on the outside of the insulating shell.

8. The insulation testing device as described in claim 1, characterized in that, One end of the grounding lead of the iron core or the clamp is electrically connected to a screw. The connecting part (10) is provided with a threaded hole (110). The threaded hole (110) is threadedly connected to the screw to realize the electrical connection between the connecting part (10) and the grounding lead of the iron core or the clamp.

9. The insulation testing device as described in claim 1, characterized in that, The top of the detection unit (20) has a detection hole (210) for connecting to an external power source.

10. The insulation testing device as described in claim 1, characterized in that, The detection section (20) is stepped, and the width of the top of the detection section (20) is smaller than the width of the bottom.

Images