Safety Instructions; Fundamental Safety Instructions; General Safety Instructions - Siemens SINUMERIK 808D ADVANCED Series Commissioning Manual

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Safety instructions

1.1

Fundamental safety instructions

1.1.1

General safety instructions

WARNING
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.
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Always observe the country-specific safety rules.
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Generally, the following six 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 switched back on
again.
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 the power
connections and the protective conductor connection.
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 water. Switch the
energy sources to a safe state.
8. Check that the correct drive system is completely locked.
After you have completed the work, restore the operational readiness in the inverse sequence.
WARNING
Risk of electric shock and fire from supply networks with an excessively high impedance
Excessively low short-circuit currents can lead to the protective devices not tripping or tripping too late, and
thus causing electric shock or a fire.
In the case of a conductor-conductor or conductor-ground short-circuit, ensure that the short-circuit current
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at the point where the inverter is connected to the line supply at least meets the minimum requirements for
the response of the protective device used.
You must use an additional residual-current device (RCD) if a conductor-ground short circuit does not reach
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the short-circuit current required for the protective device to respond. The required short-circuit current can
be too low, especially for TT supply systems.
WARNING
Risk of electric shock and fire from supply networks with an excessively low impedance
Excessively high short-circuit currents can lead to the protective devices not being able to interrupt these short-
circuit currents and being destroyed, and thus causing electric shock or a fire.
Ensure that the prospective short-circuit current at the line terminal of the inverter does not exceed the
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breaking capacity (SCCR or Icc) of the protective device used.
WARNING
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.
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Commissioning Manual
6FC5397-4EP10-0BA8, 07/2018
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