testing of 33 / 11 kv sub station it includes primery injection test of c.t. , to test tripping of pannels on actual load .-2 repairing of digital relay of 11 kv panel . relay repairing includes - cleaning of contacts , replacement of damage part of digital relay and testing . after repairing re-installation of relay and proper testing of protection . ( if relay found damage during testing ) 3 repairing of earth fault and over cuurent relay of 11 kv panel . relay repairing includes - cleaning of contacts , replacement of damage part of earth fault and over cuurent relay and testing . after repairing re-installation of relay and proper testing of protection . ( if relay found damage during testing ) 4 to test & repair electrical wiring of 11 kv pannels and to replace damaged amp. meter and volt meter . ( if found damage during testing ) 5 to repair damaged electrical tripping via inserting rated current at primery site of incoming and out going feeder of 33 / 11 kv sub station and to test tripping through relay.