Miniature GIS combined electric appliance

Abstract

The invention relates to the field of high-voltage electric appliances, in particular to a miniature GIS combined electric appliance. A circuit breaker is arranged in a metal shell filled with insulating gas and is driven by an operating mechanism; sleeves or cable terminals at the two ends of the metal shell are electrically connected with the circuit breaker through a bus in the metal shell, andthe lightning arrester is connected with the bus. The sleeve or the cable terminal comprises an insulating core body, a main insulating capacitor C1a and a voltage dividing capacitor C2a are embeddedin the insulating core body, the main insulating capacitor C1a and the voltage dividing capacitor C2a are connected in series to form a capacitive voltage divider, and the main insulating capacitor C1a is composed of a set of capacitive screens which are gradually increased in diameter and alternately arranged with insulating layers. The voltage-dividing capacitor C2a is composed of a group of capacitive screens arranged outside the capacitive screen on the outermost side of the main insulation capacitor C1a, or the voltage-dividing capacitor C2a is a capacitance tap of the main insulation capacitor C1a, and one end, connected with the main insulation capacitor C1a, of the voltage-dividing capacitor C2a is a signal output end; and the sleeve or the cable terminal head further comprises acurrent transformer CT arranged on the sleeve or the cable terminal head. The combined electric appliance is simple in structure and convenient to assemble.

Description

technical field [0001] The invention relates to the field of high-voltage electrical appliances, in particular to a miniature GIS combined electrical appliance. Background technique [0002] GIS (GAS insulated SWITCHGEAR) is the English abbreviation of gas insulated fully enclosed combined electrical appliances. GIS is composed of isolating switch, circuit breaker, grounding switch, current transformer CT, voltage transformer PT, lightning arrester, busbar, bushing (outlet terminal) and corresponding connectors. These devices or components are all enclosed in a metal grounding shell , It is filled with a certain pressure of SF6 insulating gas inside, so it is also called SF6 fully enclosed combination appliance. [0003] like figure 1 As shown in the structure diagram of the existing GIS combined electric appliance, the high-voltage power is connected through the bushing, and the lightning arrester, voltage transformer PT, current transformer CT, circuit breaker and isolat...

AI Technical Summary

Problems solved by technology

The existing GIS combined electrical appliances have the problem of large volume, occupying a large space and troublesome maintenance and installation

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