Combined electric appliance with multi-capacitive screen insulation core

Abstract

The invention discloses a combined electric appliance with a multi-capacitive screen insulation core, which belongs to the field of high-voltage electric appliances and is applied to substations. The combined electric appliance is a multifunctional small combined electric appliance. The combined electric appliance is mainly characterized in that three groups of capacitive screens of a main capacitor C1, a low-voltage capacitor C2 and an anti-interference capacitor C3 are arranged in an insulation core of a high-voltage electric appliance such as a high-voltage bushing, a cable terminal head or the like simultaneously; a voltage display apparatus, an insulation monitor and a local discharge detector which meet accuracy requirements access a terminal led out of the low-voltage capacitor C2; and energy is extracted from the terminal to a power supply for the combined electric appliance. Meanwhile, a grounding part through which a conductor flows is sleeved with a current transformer, the insulation core of the bushing or the cable terminal head is sleeved with valve plates of a plurality of annular zinc oxide arresters, the head ends of the valve plates are connected with a terminal of the bushing or the cable head, and the tail ends of the valve plates are connected with a flange of the bushing or the cable head.

Description

technical field [0001] The multi-functional combined electrical appliance based on three sets of capacitive screens belongs to the field of high-voltage electrical appliances and is used in substations. In addition to the functions of high-voltage bushings, cable terminals, current transformers, voltage transformers, and lightning arresters, it also has insulation monitoring, It has the functions of partial discharge detection and arrester discharge automatic recording, etc. It is a multifunctional small combined electrical appliance. Background technique [0002] The high-voltage electrical appliances in general substations include: in addition to transformers, circuit breakers, and isolating switches, there are also high-voltage bushings, cable terminals, current transformers, voltage transformers, and lightning arresters. But they are all independently installed in the substation. Not only is each device expensive, but it also takes up a lot of land. For this reason, com...

AI Technical Summary

Problems solved by technology

Later, GIS was developed, that is, the pipeline power transmission system filled with SF6 gas, which did reduce the footprint and space, but it was expensive, and the environment was affected by the high toxicity of SF6 gas after discharge.

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