SINAMICS DCP
Operating Instructions, 09/2019, A5E34382853K
415
Not observing fundamental safety instructions and residual risks
The non-observance of the fundamental safety instructions and residual risks stated in
Chapter 1 can result in accidents with severe injuries or death.
• Adhere to the fundamental safety instructions.
• Take into account residual risks when assessing risk.
Electric shock due to residual capacitor charge
Because of the capacitors, a hazardous voltage is present for up to 5 minutes after the
power supply has been switched off.
Contact with live parts can result in death or serious injury.
• Only open the device after 5 minutes have elapsed.
The SINAMICS DCP must be provided with extensive protection measures against
contamination in order to prevent voltage flashovers and damage. Dust and foreign bodies,
which are brought in by the cooling-air flow in particular, must be thoroughly removed at
certain intervals; this depends on the rate of accumulation of dirt, but should be carried out at
least every 12 months. The device must be blown out with dry compressed air at a maximum
of 1 bar, or cleaned using a vacuum cleaner.
The screw connections (also the protective conductor connections) must be retightened
each time that maintenance work is carried out on a SINAMICS DCP.
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