A power-lost relay is an electrical device that helps protect electronic equipment from damage during power outages or sudden voltage dips. Synonyms for this device include power interruption relay, voltage drop relay, power failure switch, and power cut relay. These relays are designed to help prevent damage to sensitive devices by either switching them off or providing them with backup power during an interruption. They are commonly used in home automation systems, industrial control systems, and emergency power supply systems. Regardless of the specific usage, power-lost relays remain an essential component for safeguarding electronic devices from unexpected power disruptions and ensuring uninterrupted operation.