Formula of high pressure AC zinc oxide resistance chip

Abstract

The invention discloses a formulation of a high-voltage AC zinc oxide resistance chip. The formulation comprises the following additives and a main material ZnO by weight percentage: 4.5 to 5.5 percent of Bi2O3, 5.0 to 6.0 percent of Sb2O3, 0.8 to 1.2 percent of Co2O3, 0.9 to 1.1 percent of MnCO3, 1.0 to 1.5 percent of NiO, 0.02 to 0.04 percent of aluminum nitrate, 0.010 to 0.050 percent of glass dust and 85.0 to 87.5 percent of ZnO. The formulation of the resistance chip has the following characteristics and advantages: 1, the formulation is a new formulation system using the zinc oxide, dibismuth trioxide, diantimony trioxide, nickel protoxide, cobalt sesquioxide and manganous carbide as main compositions, so that the internal structure of the resistance chip is more uniform and stable, and the energy endurance capability is greatly improved; and 2, the nickel protoxide and the glass dust are introduced into the formulation, so that the stability and the aging performance of the resistance chip is more excellent.

Description

1. Technical Field [0001] The invention belongs to the technical field of resistive sheets for lightning arresters, and specifically relates to a high-voltage AC zinc oxide resistive sheet formula, which is used to prepare a resistive sheet for ultra-high-voltage AC power transmission arresters. 2. Background technology [0002] Zinc oxide resistors were first developed in the 1960s. Because of their superior pressure-sensitive performance, they have been rapidly developed. According to their uses, they are divided into two types: DC and AC. AC zinc oxide resistors are the core components of AC zinc oxide arresters and are widely used in AC power transmission systems. It is based on a formula composed of zinc oxide and other multi-element metal oxides and is sintered at high temperature. It has a good non-linear volt-ampere characteristic, and its performance level restricts the grade of the arrester. In recent years, with the construction of 750kV and 1000kV ultra-high voltage A...

AI Technical Summary

Problems solved by technology

In recent years, with the construction of 750kV and 1000kV ultra-high voltage AC transmission lines, the requirements for the performance of resistors are higher and stricter. The energy tolerance and aging performance of resistors made of existing formulas are low, which cannot meet the requirements at all.

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