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

Connecting

7.1

Safety instructions

Electric shock and danger to life due to other energy sources
Touching live components can result in death or severe injury.
• Only work on electrical devices when you are qualified for this job.
• Always observe the country-specific safety rules.
Generally, the following steps apply when establishing safety:
1. Prepare for disconnection. Notify all those who will be affected by the procedure.
2. Isolate the drive system from the power supply and take measures to prevent it being
3. Wait until the discharge time specified on the warning labels has elapsed.
4. Check that there is no voltage between any of the power connections, and between any of
5. Check whether the existing auxiliary supply circuits are de-energized.
6. Ensure that the motors cannot move.
7. Identify all other dangerous energy sources, e.g. compressed air, hydraulic systems, or
8. Check that the correct drive system is completely locked.
After you have completed the work, restore the operational readiness in the inverse sequence.
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
SIMOTICS S-1FT2 synchronous motors for SINAMICS S120
Operating Instructions, 12/2023, A5E50610821B AF
WARNING
switched back on again.
the power connections and the protective conductor connection.
water. Switch the energy sources to a safe state.
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.
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