Siemens SINAMICS DCM Operating Instructions Manual page 57

Connecting
Failure to observe general safety instructions and residual risks
If the general safety instructions and remaining risks are not observed, accidents can occur
involving severe injuries or death.
• Observe the general safety instructions.
• When assessing the risk, take into account remaining risks.
Electric shock due to the residual charge of the capacitors
Because of the capacitors of the external power unit, a hazardous voltage is still present for
a period of time after the power supply has been switched off.
If live components are touched then this can result in severe injury or death.
• Open the unit only after the time specified on the warning label has elapsed.
• Before starting work, check the absence of voltage by measuring all poles, also to
The devices may be connected to a line supply with residual current operated circuit breaker
if a universal current sensitive device is being used, which in the case of a ground fault, can
also detect a DC component in the fault current. We recommend a residual current operated
circuit breaker with an operating current ≥ 300 mA, which means that it is not suitable to
protect personnel. If you have additional questions, please contact Technical Support.
The power and control terminals may be live even when the motor is not running.
When handling the device while it is open, remember that live parts are exposed. The device
must only be operated with the front covers provided by the factory fitted. When required,
additional covers should be provided in the control cabinet (for example, in the area around
the busbars).
To operate the SINAMICS DC MASTER, both front cover fixing screws must be tight.
SINAMICS DCM Control Module
Operating Instructions, 12/2018, A5E34888669A
WARNING
WARNING
ground.
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