What are the options for secondary power in protective premise fire alarm systems?

In protective premise fire alarm systems, ensuring a reliable secondary power source is critical for the continuous operation of the system during a primary power failure. The options for secondary power typically include storage batteries dedicated to the system as well as a dedicated branch circuit from an automatic starting engine-driven generator.

Storage batteries are commonly used because they provide a stable and dependable source of power that can immediately supply electricity to the fire alarm system in the event of a power outage. These batteries are typically designed specifically for backup applications and can maintain operation without any intervention, ensuring the system remains functional when it is needed most.

Additionally, a dedicated branch circuit of an automatic starting engine-driven generator also serves as an effective secondary power source. This setup provides a robust backup system that can automatically start up and supply power to the fire alarm system after a loss of primary power, enhancing the reliability of the fire alarm system.

Combining both dedicated storage batteries and a generator circuit results in a comprehensive approach to ensuring that fire alarm systems can remain operational, responsive, and effective in emergency situations, making the correct answer the combination of these two options.