An intelligent inflatable high-voltage vacuum switch cabinet for subway

Abstract

An intelligent inflatable high-pressure vacuum switch cabinet for a metro comprises a low-pressure chamber, an upper mechanism operation chamber, a lower mechanism operation chamber, a lower maintenance chamber, a lower pressure discharging chamber, a main bus inflating chamber, a cable mounting chamber, a vacuum circuit breaker inflating chamber and a rear pressure discharging chamber. The intelligent inflatable high-pressure vacuum switch cabinet is characterized in that a main conductive return circuit is sealed in the main bus inflating chamber and the circuit breaker inflating chamber, each of the inflating chambers is provided with one three-position isolating / earthing switch inside, and the main bus inflating chamber and the circuit breaker inflating chamber are electrically connected via a middle connector. Under overhauling condition or outage condition, the two three-position isolating / earthing switches can be earthed to effectively protect safety of maintainers during maintaining. When serious fault happens to the circuit breaker chamber which cannot be overhauled on site, the three-position isolating / earthing switch of the main bus inflating chamber can be separated, relative connecting pieces can be removed, the vacuum circuit breaker inflating chamber can be drawn out and replaced by a spare separation chamber, power supply can be quickly recovered, and the critical defects that a single air-chamber switch cabinet cannot be maintained on site and outage time is long are overcome.

Description

technical field [0001] The invention relates to a solid insulation high-voltage vacuum switchgear, in particular to an intelligent inflatable (C-GIS) high-voltage vacuum switchgear for subways. Background technique [0002] Medium-voltage gas-insulated metal-enclosed switchgear is a high-tech complete power distribution device newly developed internationally in the 1990s. With the design goals of modularization, multi-functional combination, high reliability and compact structure, it has created a technological, The outstanding economic achievements represent the development direction and world advanced level of contemporary medium voltage switchgear. It expands the conventional GIS technology to the medium voltage field, and uses low pressure SF6 gas or SF6 and N: mixed gas as the insulating medium. Combining GIS technology with switchgear technology to form a new complete set of serialized products called gas-insulated metal-enclosed switchgear, and its small size, anti-po...

AI Technical Summary

Problems solved by technology

Due to the structure of the single air chamber, there can only be one three-position isolation / grounding switch, so there is no reliable grounding protection at the outgoing or incoming line end, and there is no complete guarantee for the safety of operation and maintenance personnel, which cannot meet the requirements of our country. Actual operating requirements of the power system

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