The handle locking function prevents the user from opening the door of the enclosure when the switch is in the “ON” position (only if the handle is fitted on the door).Opening the door when the switch is in the “ON” position is possible by defeating the interlocking function with the use of a tool (authorised persons only). The interlocking function is restored when the door is closed. The handle is padlockable with 3 padlocks.