Division 1.2.6 Failure of the power supply

The interruption, the re-establishment after an interruption or the fluctuation in whatever manner of the power supply to the machinery must not lead to dangerous situations.

Particular attention must be given to the following points:

• the machinery must not start unexpectedly,

• the parameters of the machinery must not change in an uncontrolled way when such change can lead to hazardous situations,

• the machinery must not be prevented from stopping if the command has already been given,

• no moving part of the machinery or piece held by the machinery must fall or be ejected,

• automatic or manual stopping of the moving parts, whatever they may be, must be unimpeded,

• the protective devices must remain fully effective or give a stop command.