Siemens 6SL3845-2NN41-8AD2 Operating Instructions Manual page 51

Medium-voltage drive

Table of Contents

Training in the "Safe Torque Off / Safe Standstill" function

Any servicing that involves the "Safe Torque Off / Safe Standstill" function must be carried out

by trained qualified personnel only.

Incorrect operation of the safety function can allow the drive to start up unexpectedly.

Death, serious injury and damage to property can result.

● Ensure that everyone operating the "Safe Torque Off / Safe Standstill" function is trained

Motor coast down

If the "Safe Torque Off / Safe Stop" function is activated when the machine is rotating, the

motor power supply is disconnected after a settable delay time. The motor coasts down if it has

not already stopped.

Incorrect use can result in death, serious injury or substantial material damage.

● Put the appropriate safety measures in place in order to avoid danger to people resulting

Restart

Drive systems in which power supply to the motor is also possible via the load – e.g. ship's

drives, conveyors, fans, etc. – cannot be protected against restart using the "Safe Torque Off"

function.

Sudden and unexpected restart of the motor can result in death, serious injury or substantial

material damage.

● Take appropriate countermeasures such as mechanical braking.

High voltages

The drive is not disconnected from the supply system by the "Safe Torque Off / Safe Standstill"

function. Dangerous voltages of over 1000 V are present on the motor and drive.

High voltages can cause death or serious injury if the safety rules are not observed or if the

equipment is handled incorrectly.

● Do not undertake any work on electrical connections without previously putting all the

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