Which type of lock remains locked when it loses power?

The fail secure lock is designed to remain locked in the event of a power loss, making it an important option for certain security applications. This characteristic ensures that unauthorized access is prevented when power is disrupted, which is crucial in potentially vulnerable situations such as emergency power outages or system failures. Fail secure locks are often utilized in high-security environments where protection against forced entry is a top priority.

In contrast, other types of locks operate differently under power loss conditions. Magnetic locks typically require power to maintain their locking position and would release when power is lost. Deadbolts are mechanically operated and do not rely on power, but they do not fit the specific definition of a fail secure lock since they can be accessed without electronic control. Electronic locks depend on battery or power supply for operation and may not remain secure if power is interrupted. Understanding the differentiations among these lock types is essential for selecting the correct locking mechanism based on the security needs of a premises.