ROAD GAP ARRESTER


~ This type of lighting arrester is quit simple.

~ the two road of 15 mm diameter are bent at right angle to hold a gap between the two.

~ one road is connected to the line and the other to the ground.

~ the distance between the gap and the insulator should be more than one third of the gap length so that the art is away from the insulator when the arc occurs.

~ the length of the gap is maintained in such a way that 80% of the spark over voltage breaks down so that the steep wave front dose not come on the insulator.

~ in show the figure 






~ show the arrangement of the road gap for the transformer.


                                                                    *Advantage*
~ easy construction 

~ low maintenance


                                                               *Disadvantage* 

~ The arc maintained even after the normal voltage is reached after application.

~ this cause a short circuit in the system causing the road to melt due to the heat of the arc.

~ affect the function of the road gap arrester.

~ the polarity of the surgeon also affect the function of the arrester.