Classification of zinc oxide arresters

The development and production of zinc oxide arresters in my country has now formed an integrated and large-scale production system. In the development stage of introducing, digesting, and transplanting foreign advanced technologies, it has developed a series of products with its own independent intellectual property rights. The products have reached the international advanced level, and are in line with international standards to participate in the international market competition.

The following is combined with the zinc oxide arrester series produced in my country and classified according to their different technical indicators:

2.1 By voltage level

Zinc oxide arresters are classified according to the rated voltage value and can be divided into three categories;

2.1.1. High voltage category; it refers to the series of zinc oxide arresters above 66kV, which can be roughly divided into five levels: 500kV, 330kV, 220kV, 110kV, and 66kV.

2.1.2. Medium voltage category: It refers to the zinc oxide arrester series products in the range of 3kV～66kV (excluding 66kV series products), which can be roughly divided into five voltage levels: 3kV, 6kV, 10kV, 20kV, and 35kV.

2.1.3. Low voltage category; it refers to the zinc oxide arrester series products below 3kV (excluding 3kV series products),

It can be roughly divided into four voltage levels: 1kV, 0.5kV, 0.38kV, and 0.22kV.

2.2 According to the nominal discharge current

Zinc oxide arresters can be divided into five categories: 20, 10, 5, 2.5, and 1.5kA according to the nominal discharge current.

2.3 By purpose

Zinc oxide arresters can be divided into system line type, system power station type, system distribution type, shunt compensation capacitor bank protection type, electrified railway type, motor and motor neutral point type, and transformer neutral point type according to their uses. class.

2.4 By structure

Zinc oxide arresters can be divided into two categories according to their structure;

Zinc oxide arresters can be divided into two types according to the external insulation of the structure; porcelain jacket and composite jacket.

2.4.1. Porcelain jacket; Zinc oxide arrester with porcelain jacket is divided into four grades according to pollution resistance, grade Ⅰ is for ordinary type, grade Ⅱ is used in medium pollution areas (creepage distance 20mm/kV), grade Ⅲ is used In heavily polluted areas (creepage ratio 25mm/kV), level IV is used in extremely heavy polluted areas (creepage ratio 31mm/kV).

2.4.2. Composite jacket; composite jacket zinc oxide arrester is made of composite silicone rubber material as the jacket, and high-performance zinc oxide resistors are selected. The internal structure is made of special structure and assembled by advanced technology. It has silicone rubber material and oxide The double advantages of zinc resistors. This series of products not only have all the advantages of porcelain-clad zinc oxide arresters, but also have high insulation performance, high pollution resistance, good explosion-proof performance, small size, light weight, no maintenance, not easy to break, reliable sealing, and durable Excellent aging performance and other advantages.

2.5 Performance by structure

Zinc oxide arresters can be divided into three categories according to their structural performance; no gap (W), with series gap (C), and with parallel gap (B).

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