6-35 kV combined-type polymer-housed metal-oxide surge arrester
Type description
Product form: HY indicates a silicone-rubber-housed metal-oxide surge arrester
Structural feature: W indicates gapless, C indicates a series gap
Place of use: Z indicates station type, R indicates protection of shunt compensation capacitors, D indicates protection of rotating machines
Characteristic numeral: 1 indicates the characteristic numeral phase-to-phase, 2 indicates the characteristic numeral phase-to-earth
Referenced standards
GB11032-2000 Metal-oxide surge arresters without gaps for AC systems
JB/T8952-1999 Polymer-housed metal-oxide surge arresters without gaps for AC systems of 35 kV and below
GB311.1-1997 Insulation coordination for high-voltage transmission and transformation equipment
DL/T620-1997 Overvoltage protection and insulation coordination for AC electrical installations
JB/T8459-1996 Method for compiling the type designation of surge arrester products
The 6-35 kV combined-type polymer-housed zinc-oxide surge arrester is a protective device used to protect the insulation of power equipment against overvoltage hazards. It is a new type of arrester that limits the overvoltage between phase and earth and at the same time effectively limits the phase-to-phase overvoltage. One combined arrester can perform the function of six conventional arresters. Zinc-oxide varistors are used inside the arrester as the main element; they have good V-I characteristics and provide reliable protection for the protected equipment. It is now widely selected by power systems. A single 6-35 kV combined-type polymer-housed zinc-oxide surge arrester can simultaneously limit both phase-to-phase and phase-to-earth overvoltages, replacing six conventional arresters.
Our company is able to carry out physical property tests on the rubber of the product housing, such as tensile strength, elongation, hardness and vulcanisation characteristics, as well as type tests of the product, and has modern scientific management together with advanced production and test equipment.
Product Features
- ◆ Compact structure with high dielectric withstand voltage, making maximum use of and greatly reducing the space required;
- ◆ One-piece moulding, giving good sealing, pollution resistance, explosion-proof and moisture-proof performance;
- ◆ Novel and unique structure with rational and reliable technical performance; in particular it adopts the advantages of silicone-rubber-housed metal-oxide surge arresters and has good electrical insulation performance;
- ◆ High dielectric strength, tracking resistance, resistance to electrical erosion, heat resistance, cold resistance, ageing resistance, explosion-proof performance, good chemical stability, hydrophobicity and sealing;
- ◆ Small size and light weight, saving floor space, with flexible installation.
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