Commissioning; Safety Instructions - Siemens SIMOTICS S-1FT2 Operating Instructions Manual

Commissioning

8.1

Safety instructions

Electric shock when connected to inadequately grounded line supplies
Connecting a motor to an inadequately grounded line supply can result in death, severe injury
and damage to the motor if a fault occurs.
• Connect motors, as part of the drive system, to TN and TT line supplies with a grounded
• Ensure that the SINAMICS devices and motors are compatible with the residual current
• For line supplies with grounded line conductor, e.g. TT line supplies, use an isolating
• When connected to IT line supplies, a monitoring device must signal the first fault between
Electric shock caused by high touch voltages for brake cables
For motor cables with integrated brake cable, when the motor is operated, the motor can
charge the brake cable up to hazardous voltage levels. Coming into contact with the
conductors or the shield of the brake cable can result in death or serious injury.
• Use motor cables with separate, shielded brake cables and connect the shield of the brake
Electric shock when checking the insulation resistance
During the measurement and immediately afterward, high voltages can be present at the
terminals that can cause death or severe injury as result of an electric shock.
Contact with live parts causes electric shocks.
• Work on power installations must only be performed by qualified personnel.
• Before you begin measuring the insulation resistance, read the operating manual for the
• Never touch the terminals when making measurements or immediately after the
• Check the connected supply feeder cables to ensure that the line supply voltage cannot be
SIMOTICS S-1FT2 synchronous motors for SINAMICS S120
Operating Instructions, 12/2023, A5E50610821B AF
WARNING
neutral point or to IT line supplies.
device according to EN 61800-5-1 before you connect the devices and motors to the line
supply using residual current devices (RCDs).
transformer with grounded neutral point (on the secondary side) between the line supply
and the drive system, so that the motor insulation is not overstressed.
an active part and ground. Eliminate this fault immediately.
WARNING
cable at both ends.
WARNING
insulation resistance meter you are going to use.
measurement.
connected.
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