Handcart once contact stroke test device for high-tension switch cabinet

Abstract

The invention relates to an one-time connection stroke test device of a handcart of a high-voltage switch cabinet, and the one-time connection stroke test device is composed of a stroke measurement ruler and a test instrument; the stroke measurement ruler, the test instrument and the high-voltage switch cabinet are combined together, then the stroke of a moving contact of the handcart of the switch cabinet can be intuitively measured by the simple calculation, and the status of the plug-in matching of the moving contact and the static contact of the handcart of the switch cabinet can be judged according to the analysis of the measurement data. The one-time connection stroke test device of the invention has simple structure, low cost and can effectively avoid the fault of the switch cabinet which is caused by that the plug-in of the moving contact of the handcart of the switch cabinet is not in place or the contact is poor, and the measurement task can be completed by only one operator.

Description

technical field [0001] The invention relates to a measuring device for an electric power system, in particular to a one-time contact stroke testing device for a handcart of a high-voltage switch cabinet. Background technique [0002] Compared with the existing fixed high-voltage switch, the handcart high-voltage switch in the power system has the advantages of small size, convenient operation, maintenance and replacement. In the 10kV system of the new substation, the handcart high-voltage switch has been widely used. usage of. However, with the increasing application of high-voltage and high-current switchgear, the failure rate of high-current switchgear due to various causes of heating during operation has been high, especially during high temperature and high load periods. (Contact) Accidents of burning cabinets caused by overheating occur from time to time. Generally, current-carrying faults are mainly concentrated on 12-40.5kV medium-voltage switchgear. It is the key ...

AI Technical Summary

Problems solved by technology

For example, the quality of the switch cabinet and the handcart or the construction process may make the slide rails of the handcart uneven, resulting in

The moving contact and the static contact are not at the same height or not parallel, such as Image 6 As shown, the static contact of phase C is shorter than the two phases A and B, which will cause the contact stroke of phase C of the handcart to be small, and the insertion of phase C is not in place; Figure 7 As shown, the track of the handcart is inclined along the horizontal direction, which will result in the largest contact stroke of the handcart phase A, followed by phase B, and the smallest p

Images