Protection device of live detection equipment

Abstract

The invention discloses a protection device for live detection equipment and belongs to the technical field of circuit detection. The protection device comprises a shell, wherein an inner wall of the shell is in threaded connection with a surface of a sealing cover, a right side surface of the sealing cover is fixedly connected with a left side surface of a fixing ring, and an inner wall of the shell is fixedly connected with a surface of a supporting ring. According to the protection device of the live detection equipment, the detection head, the metal block and the ball are arranged, the ball presses the protection spring under the inertia effect of the ball to be separated from the first attaching block till the ball resets under the action of the protection spring to be attached to the first attaching block again after falling, the acting force of falling and stamping on high resistance can be reduced, and meanwhile, the high resistor can be instantly separated from the high resistor during falling, so a relatively large acting force is prevented from being caused to the high resistor, a very good protection effect on the high resistor is greatly achieved, the risk of damage to the high resistor is greatly reduced, and safety performance of long-time use is improved.

Description

technical field [0001] The invention belongs to the technical field of circuit detection, in particular to a protection device for live detection equipment. Background technique [0002] Partial discharge is an electrical discharge in the insulating medium, which is limited to a part of the measured medium and only insulates the conductors. Partial bridging of edges This type of discharge may or may not occur at some weak point in the conductor's adjacent power equipment insulation. Partial discharge under the action of a strong electric field is a common problem in high-voltage insulation, although partial discharge generally does not cause insulation. But it can lead to the penetrating breakdown of the dielectric, especially the organic dielectric. If the partial discharge exists for a long time under certain conditions, it will lead to insulation degradation or even breakdown. Partial discharge tests on power equipment can not only understand the insulation status of the ...

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Problems solved by technology

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a protection device for live detection equipment, which solves the problem that most current electric pens use a method of direct contact with the detection head with high resistance, so that when the electric pen falls, the detection head The impact is very easy to affect the high resistance, making it unfavorable to protect the high resistance. At the same time, when the voltage value in the circuit to be tested cannot be determined, if the voltage value exceeds the detection range, the traditional detection method has a huge problem. security risks

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