DEHNgap arrester/lightning Arrester Box T275 DG TT SN1537 Used Disassemble Parts in Pakistan  Spd 4pole In Pakistan  BR2571 Description A lightning arrester (alternative spelling lightning arrestor ) (also called lightning diverter) is a device used on electric power transmission and telecommunication systems to protect the insulation and conductors of the system from the damaging effects of lightning . Specifications: Multipole, modular surge arrester DEHN DG T275 400 FM (DG TT SN1537) DEHNguard 900 550 Dimensions: 90 x 70 x 65 mm