How safe are vacuum traverses / vacuum lifters?

When operated within defined parameters, the vacuum traverse is an extremely safe tool.
The main traverse is designed as a vacuum accumulator that maintains a vacuum reserve for at least five minutes.
In the event of a power failure, the load is held for this time. An acoustic warning signal is emitted if the vacuum falls below the minimum value. At the same time, the employee can read off the vacuum level from a pressure gauge.
Optionally, the vacuum lifter can also be equipped with a signal lamp.
The acoustic warning signal and the optional signal lamp are equipped with a battery.
This allows the vacuum lifter to operate flawlessly in the event of a power failure.