S-1FK7 DYA G2 synchronous motors with planetary gearbox
Operating Instructions, 05/2018, A5E44881183B AA
73
Commissioning
7
7.1
Safety instructions
WARNING
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
neutral point or to IT line supplies.
•
Ensure that the SINAMICS devices and motors are compatible with the residual current
device according to EN 61800-5-1 before you connect the devices and motors to the
line supply using residual current devices (RCDs).
•
For line supplies with grounded line conductor, e.g. TT line supplies, use an isolating
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.
•
When connected to IT line supplies, a monitoring device must signal the first fault
between an active part and ground. Eliminate this fault immediately.
WARNING
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 cable at both ends.
