What is HV surge arrester?

A surge arrester is a device to protect electrical equipment from over-voltage transients caused by external (lightning) or internal (switching) events. This is usually achieved through use of a varistor, which has substantially different resistances at different voltages.

Can a surge go through a surge protector?

A lightning bolt that directly strikes a power line in the vicinity of your home can easily over-power even the best consumer-grade surge protectors. That’s just the way it is. However, that doesn’t mean you should try to save a few bucks by not buying a new surge suppressor to protect your new computer!

What kind of protection does ABB surge arresters offer?

ABB surge arresters are the primary protection against atmospheric and switching over voltages. Search What are you looking for? Search Login Contact us Global Choose your region and language Region

Can a surge arrester be used to divert surges?

A correctly selected arrester can divert surges almost endlessly, provided the energy to be dissipated is within the capability of the arrester. In the event that an arrester is required to dissipate more energy than it is capable of, it will sacrifice itself by failing short circuit.

Why are surge arresters used in power grids?

Medium-voltage surge arresters Surge arresters are used for protection of electrical equipment from all kind of overvoltages caused by lightening or switching operations. Hitachi ABB Power Grids has more than 100 years of experience in designing and manufacturing surge arresters and protection devices.

How are surge arresters and counters short circuit behaviour?

Short circuit behaviour – Surge arresters and counters James Taylor, ABB Power Products, Ludvika, Sweden Abstract By nature, a surge arrester may be overloaded at any time as part of its normal duty. This places tough demands on their ability to “fail safe” and not risk damage to equipment or injury to personnel in the vicinity.

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