Substation portable pneumatic short-circuit grounding device

Abstract

The invention discloses a portable pneumatic short-circuit grounding device for a substation, which relates to a short-circuit grounding device for a substation, comprising a pneumatic mast (1), a knife working cylinder (2) and a moving contact (3). The pneumatic mast (1) is set as It is composed of multi-stage cylinder connections. The bottom of the lowest stage cylinder is provided with an inlet and outlet valve (11). The knife working cylinder (2) is fixed on the top of the pneumatic mast (1). The knife working cylinder (2) A knife transmission rod (4) and a piston (21) connected to it are arranged inside, an air inlet and outlet hose (22) is arranged at the bottom of the knife working cylinder (2), and a pair of moving contacts (3) are , respectively arranged on the top of the two clamping arms (51) of the moving contact clamping device (5). The invention expands the height range of the portable short-circuit grounding wire, reliably grounds ultra-high voltage and ultra-high voltage outdoor open electrical equipment with a high installation height, has simple structure, is convenient to carry, and is safe to operate.

Description

technical field [0001] The invention relates to a short-circuit grounding device for a substation, in particular to a portable pneumatic short-circuit grounding device for a substation. Background technique [0002] The grounding wire is an important tool in the power system to ensure the safety of the staff when voltage unexpectedly appears on the equipment and lines that have been powered off. Inductive voltage generated by electrified equipment is harmful to the human body, and at the same time, the residual charge of the power-off equipment is discharged. Installing and removing temporary ground wires is an important maintenance operation in power systems. At present, portable short-circuit grounding wires are usually used in the maintenance work of substation equipment in substations, and the short-circuit grounding wires are mainly hung on the maintenance equipment or conductors by using insulating operating rods. However, at the substation maintenance site, the grou...

AI Technical Summary

Problems solved by technology

Taking the STB-550 grounding switch knife produced by Wuxi AREAL Company as an example, the distance between the static contact of the switch knife and the ground has reached 9180mm, so in the actual work site, even if the longest grounding operation rod is used, the staff must The grounding wire can only be hung manually at a height of about 3 to 4 meters. Since the 500kV grounding wire has a large weight and the length of the grounding rod is too long, in this case, the staff is prone to the risk of falling from a high altitude when operating manually. Risk of Inductive Electric Shock

Images