What type of protection is specified for frequency in onboard power sources?

Under/over frequency protection is essential in onboard power sources to ensure reliable operation and to prevent damage to electrical equipment. In marine applications, various equipment requires a stable frequency to function correctly, typically 50 or 60 Hz depending on the region. If the frequency deviates too far below or above this standard, it can lead to inefficient operation or even catastrophic failure of sensitive electronic devices and systems.

This form of protection monitors the frequency of the electrical supply. If the frequency falls outside a specified range, protective measures can be implemented automatically, such as disconnecting loads or shutting down the power source. This helps to maintain the safety and functionality of onboard electrical systems, reducing the risk of equipment failure and maintaining a safe environment on the vessel.

Other types of protection mentioned, such as voltage protection, short-circuit protection, and ground fault protection, serve their own critical functions but do not specifically address frequency stability, which is crucial for ensuring the correct operation of marine electrical systems.