About Protection and control systems of the main auxialiry generators of the ship have to work even years after the ship has been delivered. However some paraameters such as external factors which can occur after some time and equipment life can cause the equipment to work improperly. It is possible to detect these faults before they occur protect the user from damage that may arise due to faults.

Comap, DEIF (PPM-3, Delomatik-4 ), Symap (Stucke Elektronic) are some well knowm equipments.