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Secondary sampling alligator clip for lightning arrester live-line test

A live test and re-sampling technology, which is applied in the direction of instruments, measuring devices, and measuring electrical variables, can solve problems such as unstable fixation, achieve stable results, good clamping and fixing, and increase stability and reliability.

Active Publication Date: 2021-02-02
STATE GRID FUJIAN ELECTRIC POWER CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of existing sampling crocodile clips such as weak fixation, the present invention designs a lightning arrester live test secondary sampling crocodile clip. The structure of the present invention is simple, and the crocodile clip can be better clamped and fixed on the open screw. The outer wall of the hole makes the measurement result more stable and accurate

Method used

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  • Secondary sampling alligator clip for lightning arrester live-line test
  • Secondary sampling alligator clip for lightning arrester live-line test
  • Secondary sampling alligator clip for lightning arrester live-line test

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Press the clamp body 12 of the main clamp 10 by hand, open the crocodile clamp, and then extend the head of the sub-clamp 20 into the open screw hole 1, and the contact head 216 on the head of the detection rod 211 on the sub-clip 20 withstands the measured screw, Continue to extend the head of the sub-clamp 20 so that the spring has a pre-tightening force, and then turn the collet 11 counterclockwise, the helical teeth 31 on the collet 11 rotate with the collet 11, and when the helical teeth 31 rotate, push away the block 32, The block 32 drives the connecting rod 34 to the top, and the first spring 36 is pulled away by the top of the connecting rod 34. After the helical teeth 31 pass through, the block 32 returns to its position under the action of the first spring 36, and continues to withstand the next When the helical tooth 31 rotates to a predetermined angle, because the teeth of the helical tooth 31 are inclined downward, the helical tooth 31 is blocked by the blo...

Embodiment 2

[0028] If the depth of the open screw hole 1 is relatively shallow, then extend the head of the auxiliary clamp 20 into the open screw hole 1, make the contact head 216 between the head of the auxiliary clamp 20 and the head of the detection rod 211 withstand the measured screw, and adjust the lock The device 30 makes the alligator clip bite the outer wall of the open screw hole 1, and starts the test. Since the contact head 216 and the auxiliary clip 20 are in contact with the screw under test, and the contact head 216 and the auxiliary clip 20 are both connected to the connector 22, so More stable data can be measured. After the test is completed, the main clamp 10 and the auxiliary clamp 20 are taken out, the chuck 11 is returned, and the main clamp 10 and the secondary clamp 20 are reset.

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Abstract

The invention relates to a lightning arrester live test secondary sampling alligator clip, and belongs to the technical field of detection equipment. The clamp comprises a main clamp and an auxiliaryclamp; the main clamp is rotatably connected with the auxiliary clamp, a torsional spring is arranged at the joint of the main clamp and the auxiliary clamp, the torsional spring provides an elastic force to enable the front end of the main clamp and the front end of the auxiliary clamp to be clamped, a connector is arranged at the tail end of the auxiliary clamp, and the main clamp comprises a clamp body and a chuck hinged to the front end of the clamp body; the clamp body is rotatingly connected with the auxiliary clamp; a locking device is arranged between the chuck and the clamp body, anda probe device is arranged on the auxiliary clamp. The alligator clip solves the problems of infirm fixation and the like of a sampling alligator clip in the prior art.

Description

technical field [0001] The invention relates to a secondary sampling crocodile clip for live testing of lightning arresters, which belongs to the technical field of detection equipment. Background technique [0002] The zinc oxide arrester live test can judge the aging and damp condition of the arrester valve by measuring the resistive component of the leakage current of the arrester valve without power failure. It is generally used when sampling the secondary voltage of the zinc oxide arrester Sampling is carried out through empty screw holes, etc. The sampling port is deep and narrow, and the traditional alligator clip is used for operation. The metal parts are in poor contact, resulting in unstable reading signals and large data fluctuations. At the same time, the alligator clip is easy to pop out when it is not fixed firmly. It is necessary to suspend the test and re-connect the secondary wiring, and there is a potential short-circuit safety hazard. Repeated secondary wi...

Claims

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Application Information

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IPC IPC(8): G01R1/04
CPCG01R1/0425
Inventor 杨屹洲陈达壮林志锋蔡宗斌李建英洪艳君刘杰傅迎舒林淑娟汤杰
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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