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|Type:||Metal Oxide Surge Arrester||Material:||Porcelain|
|Nominal Current:||20KA||Purpose:||Over-Voltage Protection|
500kV Extra-high Voltage Type A.C System Surge Arrester , Porcelain Substation Type Arrester
Porcelain Surge Arrester for 35~220kv alternating system
Main features: It adopts double sealing structure, the core encapsulates by molded silicone rubber which completely solves the sealing problem of porcelain housed products.
It has a two-way pressure release structure.
Its core component ZnO varistor has good pressure ratio, consistency, large flow capacity and high reliability.
E creepage distance of porcelain housed products is wide which is suitable for IV level heavy pollution areas.
Rated voltage: 444KV
Nominal discharge current: 20KA
Shed diameter: 412/380
Creepage distance: 17052mm
Gross weight: 1355kg
High current impulse: 120KA
Lightning impulse withstand 1425KV
Switching impulse withstand: 1050/1175
The zinc oxide arrester is mainly used to protect distribution transformer,cable
connector and electrical equipment from being damaged by lightning impulse
voltage and operating over-voltage.