Maintenance - Siemens SINAMICS Series Operating Instructions Manual

Maintenance

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.
• When assessing the risk, take into account remaining risks.
Electric shock due to the residual charge of the TSE capacitors
Because of the TSE 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 five minutes have elapsed.
The converter unit must be provided with extensive protection measures against
contamination in order to prevent voltage flashovers and, therefore, destruction. 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 unit 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 the SINAMICS DCM.
Please note the following when working with converter units featuring increased air cooling:
● The bearings for the fans are designed for an operating period of 30000 hours. The fans
must be replaced in good time to ensure the continued availability of the thyristor sets.
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
WARNING
DANGER
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