Five safety rules
1. Disconnect the system.
Also disconnect the auxiliary circuits, for example, anti-condensation heating.
2. Secure against reconnection.
3. Verify absence of operating voltage.
4. Ground and short-circuit.
5. Provide protection against adjacent live parts.
To energize the system, apply the measures in reverse order.
2.4 Safe handling
WARNING
High voltages from external supplies
Even if the circuit breaker is open, parts of the drive can be under voltage (live) as a result of
the auxiliary voltage at the premagnetization, precharging or demagnetization transformers.
This danger is not limited to the drive, but can also occur with components that are electrically
connected to the drive (e.g. circuit breakers or isolators). Touching live parts can result in
death, serious injury, and damage to property.
● Isolate all components that can feed voltage to the converter before commencing work.
WARNING
High voltages during operation
When operating this equipment very high voltages develop. Even after switching off the mains
voltage, or while the connected machine is still turning, high voltages can remain for a
prolonged length of time. High voltages can cause death or serious injury if the safety rules
are not observed or if the equipment is handled incorrectly.
● Operate the drive properly.
● Always follow the "The five safety rules (Page 17)" when performing any work.
● Only remove the covers using the methods described by these operating instructions.
● Maintain the drive regularly and correctly.
Safety instructions
2.4 Safe handling
SINAMICS SM150 6SL3845-7NN46-7AA0
18 Operating Instructions 04/2017
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