Fundamental Safety Instructions; General Safety Instructions - Siemens SINAMICS S120 Manual

Fundamental safety instructions

2.1

General safety instructions

Electric shock and danger to life due to other energy sources
Touching live components can result in death or serious 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 hazardous energy sources, e.g. compressed air, hydraulic systems, water.
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 if there is no ground connection
For missing or incorrectly implemented protective conductor connection for devices with
protection class I, high voltages can be present at open, exposed parts, which when
touched, can result in death or severe injury.
• Ground the device in compliance with the applicable regulations.
Air-cooled chassis power units
Equipment Manual, 06/2020, 6SL3097-5AE00-0BP3
WARNING
switched back on again.
the power connections and the protective conductor connection.
Switch the energy sources to a safe state.
WARNING
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