A protection system consists of circuit breaker(s), instrument transformers, protective relay(s), and a DC system. Every component of this system must perform properly for the system to work reliably.

Standby batteries must provide the equipment they serve with standby power in the event of a power failure. However, the capacity of such batteries can drop significantly for a number of reasons before their calculated life expectancy is reached. This is why it is important to check batteries at regular intervals. The only reliable way of measuring battery capacity is to conduct a discharge test.

Addelec Power Services use the Programma Torkel.