SCHEDULE FOR LIGHTNING ARRESTER

 LIGHTNING ARRESTOR DEFINITIONS

    Lightning arrester gives protection to substation equipments by discharging lightning & switching over voltages to earth. It consists of a series of spark gaps and several non-linear resistances like thyrite, metrosil, etc. 

RECOMMENDED MAINTENANCE SCHEDULE OF LIGHTNING ARRESTER

S/No.	Points to be Inspected	Periodicity
1	Note down the recording of leakage current. If it is in red zone, replace that defective LA	Daily
2	Check & tightness of all connections	Yearly
3	Clean insulators & check for any cracks	Yearly
4	Check earthing connections and tightness	Yearly
5	Check insulation resistance	Yearly
6	Check structure supporting hardware & its tightness. Also check paint condition, touch up if required	Yearly