Inverter chassis units
Operating Instructions, 07/2016, A5E00331449A
17
General safety instructions
Danger to life due to live parts and other energy sources
Death or serious injury can result when live parts are touched.
• Only work on electrical equipment if you are appropriately qualified.
• Always observe the country-specific safety rules for all work.
Generally, six steps apply when establishing safety:
1. Prepare for shutdown and notify all those who will be affected by the procedure.
2. Disconnect the machine from the supply.
– Switch off the machine.
– Wait until the discharge time specified on the warning labels has elapsed.
– Check that it really is in a zero-voltage state, from phase conductor to phase
conductor and phase conductor to protective conductor.
– Check that every auxiliary circuit is de-energized.
– Ensure that the motors cannot move.
3. Identify all other dangerous energy sources, e.g. compressed air, hydraulic systems or
water.
4. Isolate or neutralize all hazardous energy sources by closing switches, grounding or
short-circuiting or closing valves, for example.
5. Take measures to prevent reconnection of the energy sources.
6. Ensure that the correct machine is completely interlocked.
After you have completed the work, restore the operational readiness by following the
above steps in the reverse order.
Danger to life through a hazardous voltage when connecting an unsuitable power supply
Death or serious injury can result when live parts are touched in the event of a fault.
• Only use power supplies that provide SELV (Safety Extra Low Voltage) or PELV
(Protective Extra Low Voltage) output voltages for all connections and terminals of the
electronics modules.
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