(i) elimination of grading resistors/capacitors, which reduced further the number of parts used for the arrester construction
(ii) energy absorbed by the non-linear resistor represents only a fraction of the discharge energy of the transmission line because there is no follow current,194 Advances in high voltage engineering and parallel connections of varistors to increase the energy absorption capability of the arrester are now possible [5]
(iii) lower discharge voltage (residual voltage which appears across the arrester terminals when a discharge current is flowing through it [6, 7])
(iv) lower protective level (highest discharge voltage that appears between arrester
terminals during specific conditions of a discharge operation [6, 7])
(v) faster switching capability compared with a spark gap time response.