Designed to increase efficiency in traditional bolt interlock applications, KSP key-operated, mechanical interlock is suitable for safe locking of simple actuating mechanisms. Internal spring is used to automatically extend lock's bolt to its fullest extent when circumstances permit. Generally used at start of process, interlock traps key while equipment is running. Once the equipment is in safe state, key is released and can be used to gain access or start separate process.
This story is related to the following:Interlocks | Key Interlock Systems