Surge Arresters

Elpro International Ltd. is India's largest and among the leading companies in South Asia in the design, manufacture and supply of distribution, intermediate and station class Metal Oxide Surge Arresters with technology from GE, USA. In tune with changing times and technology, Elpro's products were first upgraded from 2H type Intermediate Arresters to Active- Gap technology and, a few years later, again upgraded to Metal Oxide Arresters, alternatively known as Gapless. Besides technical advantages, Gapless Arresters provide significant cost savings in insulation compared to similar traditional Gap-type Arresters.

Arresters of special design are also built to meet specific application requirements. The Mogard Surge Arrester consists of a stack of Zinc Oxide discs mounted in a sealed porcelain housing. Each disc is wedged by means of a silicon rubber wedge, which offers better heat transfer capability and protection against physical damage during transport. The pressure relief device is an integral part of the Mogard Arrester and prevents violent shattering of the Arrester if wrongly operated.

Zinc Oxide Distribution Class Arrester Applications Protection against overvoltage caused by lightning/switching surges Utilised in distribution network Range: 3 kV - 36 kV Advantages Excellent surge protection and negligible wattage dissipation Proper end sealing to prevent failure due to moisture Compact size and minimum weight ensures easy transportation and installation Gapless design promotes maximum reliability and durability Excellent protection characteristics and temporary overvoltage capability		Zinc Oxide Station Class Arrester Applications Protection against overvoltage caused by lightning and switching surges Protection of equipment for substations Range: 3 kV - 360 kV Advantages Effective in long discharge periods Simple rugged construction protects against internal Arrester damage during transportation and installation Better thermal ability and efficient dissipation of energy due to eccentric assembly Absorbs temporary overvoltage and switching surges