When the Safety devices are out of power, rather than the equipment available, the system. To solve the problem with security while operating, and according to the Safety Agency's practices.
When a device from the Dock Safety Equipment to supply power to the system. To solve such problems with safety during operation. And according to the procedures of the Agency Safety.
When the device Safety out of free will to power equipment instead of to the system. To solve such problems with safety during working. In accordance with the practices of Safety agencies.