www.a-ts.cn A-TS Technology
FT50
10
1.3 Special Warnings
DANGER
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 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.
DANGER
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 at the point where the converter 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 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.
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
