タイトルまたは説明

Arrester is a kind of overtage protector mainly applied for the protection of various electrical appliances(such as transformer,swith,capacitor,trap,mtual inductor,generator,motor and power cable etc.) in powr system.railway electrification system and communication system from being damaged by atmosphere overvoltage,operation overvoltage and power frequency temporary overvoltage etc. The arrester is the basis of insulation coordination in pwer system. The core elements of metal oxide arrester(resistor idsc) applies an advanced formulate with zinc oxide as the main  material and has an oustanding nolinear properties(voltage-ampere).That is ,under the normal operating voltage,the current passing through is only on microampere level. When overvoltage is incurrred ,the current passing through can be thousands of amperes instantlly and the arrester is swithched into conduction to release the energy of overvoltage.By this means the damaged caused by overvoltage on the elctric transmission and transformation equipments can be effectively restrained. The traditional silicone carbide arrester has high steep wave discharging decentrality. While the zinc oxide arrester has good steep wave response properties and make no delay on steep wave voltage and provide low residual voltage during operation;and also has the advatage of no discharging decentrality.The arrester can greatly improve the protective margin of the steep wave and operation wave.And on insulation coordination,the proactive margtins of steep wave,lighening wave and operation wave are nearly cosistent and best protection can be provided for the pwer equipments. Composite coating metal oxide arrester applies integrated extruding shaping and both-end envelopment techniques and can provide high performances of sealing and antiexplosion,pollution resistance,free of cleaning and reducing the wet flashover in forggy confitions.The product is also featured by electrical erosion resistance,agin resistance,small volume,light weight and easy installation and maintenace;and is the upgraded new generation product of porcelain sheath arrester.