Anti-false touch isolation tool and isolation method for secondary terminals of voltage loop

Abstract

The invention relates to an accidental-collision prevention isolation tool aiming at a voltage loop secondary terminal and an isolation method thereof. An upper isolation support and a lower isolation support which are superposed and plugged up and down are arranged. A splicing column of a lower isolation support top surface is inserted into a splicing hole of an upper isolation support bottom so that the upper isolation support is fixed to a top of the lower isolation support. An upper left baffle bar and a lower left baffle bar of the isolation tool are used to shield an outer side of a secondary-terminal charged side so that a screw of the terminal electrification side is not exposed. An upper right plug bar and a lower right plug bar of the isolation tool are plugged into a gap between a secondary-terminal charged side metal connection sheet and a non-charged side metal connection sheet so as to guarantee insulation of the charged side and the non-charged side. Simultaneously, an upper fastening plug and a lower fastening plug of the isolation tool are plugged into a terminal screw hole so as to guarantee fastening performance of connection of the isolation tool and the secondary terminal. The accidental-collision prevention isolation tool possesses advantages that the tool can be repeatedly used; fastening performance is high; usage is convenient; and isolation performance is good.

Description

technical field [0001] The invention relates to the field of power system protection and maintenance of measurement and control devices, in particular to an anti-mistouch isolation tool and isolation method for secondary terminals of a voltage loop. Background technique [0002] Periodic blackout inspection of secondary equipment and circuits in substations is a technical means to improve the normal operation level of equipment and circuits and ensure their correct operation. In recent years, with the rapid development of the power system, industrial and residential electricity consumption has increased significantly, and the number of substations has also increased sharply. Frequent accidents have seriously affected the normal operation of the power system. During the secondary equipment inspection process, the busbar and adjacent intervals are often live. During the safety measures, it is necessary to connect the secondary cable of the busbar PT at the terminal block of th...

AI Technical Summary

Problems solved by technology

In recent years, with the rapid development of the power system, industrial and residential electricity consumption has increased significantly, and the number of substations has also increased sharply. Frequent accidents have seriously affected the normal operation of the power system. During the secondary equipment inspection process, the busbar and adjacent intervals are often live. During the safety measures, it is necessary to connect the secondary cable of the busbar PT at the terminal block of the protection and measurement and control panel. The connection point is disconnected, and the equipment is pressurized on the non-live side. At the same time, isolation measures are taken on the live side. Since the existing isolation measures are not perfect, once the isolation is not in place, it will increase the possibility of maintenance personnel accidentally touching the terminals on the live side. It will cause a short circuit in the secondary circuit of the busbar PT, which will not only easily cause false tripping of adjacent lines, but also pose a great threat to personal safety. At this stage, red insulating tape is often used as an isolation tool for the live side. The disadvantages are as follows: 1 ) The isolation effect is limited; 2) The tightness is poor; 3) The material cost is high and it is not environmentally friendly. The reasons for these shortcomings are: 1) The red insulating tape can only partially isolate and warn the maintenance personnel. Most of them are still exposed; 2) The red insulating tape is easy to break and fall off. Once the above situation occurs, it will increase the possibility of maintenance personnel touching the terminals on the live side by mistake; 3) Since the red insulating tape cannot be recycled, there is a high risk of Disadvantages such as cost and environmental protection

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