On-pole switch

Abstract

The invention provides an on-column switch, belonging to the technical field of electricity. The invention solves the problems that the existing on-column switch is provided with low safety factor and has no prompt function. The on-column switch comprises a box body with a sealed cavity, and a main shaft threaded through the box body; the cavity of the box body is filled with arc extinguishing insulating medium; an outlet terminal threaded through the side walls of the box body is arranged on the box body; the inner end of the outlet terminal is located inside the box body and fixedly provided with a static contact and an arc extinguishing grid; the box body is provided with an intermediate terminal threaded through the side walls of the box body; the inner end of the intermediate terminal is located inside the box body and hinged with a dynamic contact; the dynamic contact is connected with the main shaft through a connecting rod; the box body is also provided with an inlet terminal; and an insurance mechanism is arranged between the inlet terminal and the intermediate terminal and connected with the two terminals. The invention adopts double insurance and the insurance mechanism is arranged outside the box body, so the state of the insurance mechanism can be observed. The on-column switch is provided with prompt function and has high security and rational structure.

Description

technical field [0001] The invention belongs to the technical field of electricity, and relates to a basic electrical component, in particular to an on-post switch. Background technique [0002] At present, there are many types of column switches on the market, and the common ones are column circuit breakers, column load switches, and column disconnect switches. The circuit breaker on the column is mainly used for switching, control and protection in sections of the distribution line, and can break and close short-circuit current; the load switch on the column has the capacity of carrying, breaking and closing rated current, but cannot break the short-circuit current. It is used for line segmentation and fault isolation; the isolation switch on the column is mainly used to isolate the circuit, and there are obvious fractures in the open state, which is convenient for line maintenance and reconstruction of the operation mode. [0003] For example, a Chinese patent document o...

AI Technical Summary

Problems solved by technology

The switch with this structure may have a certain load and arc extinguishing function, but there are major disadvantages

When power-off construction is required, the main shaft is rotated to separate the moving contact from the static contact. At this time, if the switch fails, the moving contact cannot be separated from the static contact even though the main shaft has been turned in place. Both the static contact and the moving contact are set in the insulating cover, and it is impossible to observe the state between the moving contact and the static contact

The construction personnel cannot know whether the switch is faulty. If the construction personnel carry out electric construction at this time, it will definitely cause loss of life and property

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