Research and Analysis on the Natural Contamination Characteristics of Insulators in the East China Power Grid-Taizhou Haoxin Electric Power Machinery Co., Ltd.

Research and Analysis on the Natural Contamination Characteristics of Insulators in the East China Power Grid

Release time:

2017-07-03

The suspension insulators used on 500-kV transmission lines in the East China Power Grid come in two types: porcelain and glass. The porcelain suspension insulators include standard type (X--4.5, XP series), double-shed type (XWP2 series), deep-rib type (XP5 series), and bell-type insulators (such as NGK’s CA--735EZ). A newly introduced three-shed type is also available (Tangshan NGK’s CA--872EZ). Glass insulators come in standard and bell-type designs (LXP series and FC series). According to field measurements, the ratio of natural contamination accumulation among standard, double-shed, and bell-type insulators is approximately 1:(0.3–0.5):(1.0–1.4).

The 500-kV transmission lines of the East China Power Grid utilize two types of suspension insulators: porcelain and glass. The porcelain suspension insulators include standard types (X--4.5, XP series), double-shed types (XWP2 series), deep-rib types (XP5 series), and bell-type insulators (such as NGK’s CA--735EZ). Additionally, a newly introduced three-shed type is now in operation (Tangshan NGK’s CA--872EZ). As for glass insulators, there are standard types and bell-type insulators (LXP series and FC series).

According to measured data, the ratio of natural contamination accumulation among standard-type, double-umbrella-type, and bell-type insulators is approximately 1:(0.3–0.5):(1.0–1.4).

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