What power source is necessary to use the SPPR?

The SPPR, or Standby Power Protection Relay, typically requires the right battery bus to operate effectively. This power source is essential for ensuring that the SPPR functions correctly, providing standby power and safety features. The right battery bus is often used in systems where maintaining power is critical, such as during certain flight conditions or system failures.

In aviation systems, having a dedicated battery bus supply can reduce the risk of power loss, allowing essential equipment like the SPPR to remain operational even when other power sources are compromised. This configuration ensures that the SPPR can perform its protective functions without interruption, contributing to the overall safety and reliability of the aircraft's systems.