The development and production of zinc oxide surge arresters in China is now forming a collective and large-scale large-scale production system. After the introduction of advanced technologies for the introduction, digestion, and transplantation of foreign advanced technologies, a series of products with independent intellectual property rights have been developed and developed. Products have reached the international advanced level, and with international standards to participate in the international market competition.
The following combinations of zinc oxide arrester products produced in China are classified according to their different technical specifications:
2.1 According to the voltage level of zinc oxide surge arrester models are classified according to the rated voltage, can be divided into three categories;
2.1.1. High pressure class; it refers to the zinc oxide surge arrester series with the grade above 66KV, which can be roughly divided into four grades: 500kV, 220kV, 110kV and 66kV.
2.1.2. Medium voltage class; it refers to the zinc oxide surge arrester series within the range of 3kV to 66kV (excluding 66kV series products), which can be roughly divided into four voltage classes of 3kV, 6kV, 10kV, and 35kV.
2.1.3. Low voltage category; it refers to 10KV zinc oxide surge arrester products below 3KV (excluding 3kV series products),
Can roughly be divided into 1kV, 0.5kV, 0.38kV, 0.22kV four voltage levels.
2.2 According to the nominal discharge current of zinc oxide surge arresters according to the nominal discharge current can be divided into five categories of 20,10,5,2.5,1.5 kA.
2.3 Types of Use High Voltage Arrester According to the application, it can be divided into system-type line, system-type power station, system-type power distribution, shunt compensation capacitor bank protection type, electrified railway type, motor and motor neutral type, transformer neutral Point type seven.
2.4 According to the structure of zinc oxide surge arresters can be divided into two categories according to the structure;
2.4.1. Porcelain jacket; Porcelain zinc oxide surge arresters are divided into four grades according to the pollution resistance performance, grade I is common type, grade II is for medium dirt area (climbing ratio 20mm/KV), grade III is for use The heavy pollution area (creepage distance from 25mm/kV) and class IV are used for special heavy pollution areas (creepage distance from 31mm/kV).
2.4.2. Composite jacket; composite jacket drop arrester is made of composite silicone rubber jacket, and use high-performance zinc oxide resistors, the internal use of special structures, assembled with advanced process methods, with silicone rubber material and oxidation Zinc resistors have the dual advantages. This series of products not only has all the advantages of the porcelain jacket zinc oxide arrester, but also has the insulation properties, high resistance to contamination, good explosion-proof performance and small size, light weight, usually do not need maintenance, not easy to damage, reliable sealing, anti-aging Excellent performance and other advantages.
2.5 According to the structural performance of zinc oxide surge arresters can be divided according to structural performance; no gap (W), with series gap (C), with parallel gap (B) three categories.
A training desk is a table designed specifically for activities such as training and meetings. It has characteristics such as durability and ease of movement, which can meet the needs of different groups of people. Training desks can be classified into various categories based on their materials, structure, and other aspects. Below will be a brief introduction to the classification of training desks.
1. Material classification
The materials of the Training Chair mainly include wooden boards, PVC boards, etc. Training desks made of wood usually have strong stability and durability, making them suitable for long-term meetings or training activities. The training table made of PVC board has certain safety performance and is generally more lightweight.
2. Structural classification
The structure of training chairs mainly includes single tables, combination tables, etc. A single chair is the most common training table, and each training table is independent and can be adjusted as needed. Combination refers to the combination of multiple seats together, usually in the form of geometric shapes or rows, suitable for use in large training venues. A stackable table is a training table that can be folded and placed together, saving space and facilitating storage and handling.
Training Table,Tea Table,Coffee Table,Visitor Table
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