09.02 Maintenance
Siemens AG 6SE7087-6AK85-1AA0
8-1
Rectifier/Regenerating Unit Operating instructions
8 Maintenance
WARNING
The rectifier/regenerating units are operated with high voltages.
All work on the unit must be carried out in agreement with the national electrical regulations
(in Germany: VBG 4).
Maintenance and repair work must only be carried out by qualified personnel.
Use must only be made of the spare parts approved by the manufacturer.
It is imperative to observe the prescribed maintenance intervals and the repair and
replacement instructions.
As the result of the dc link capacitors in the connected SIMOVERT Master Drives, the unit
still contains a hazardous voltage up to 5 min. after isolation (power terminal and electronic
power supply). This is why it is only permitted to open the unit after observing an
appropriate waiting time.
Even after isolation of the cable terminals and discharge of the DC link, the snubber
capacitors remain charged if the trigger modules A23 are separated.
The power and control terminals may still be live even in the event of motor standstill.
Despite disconnecting the power terminals from the supply, terminal X19 may still be live
due to the external fan supply.
If work on the activated unit is necessary:
♦ do not touch any live parts.
♦ use only proper measuring equipment and protective work clothing.
♦ stand or sit on an unearthed and isolated surface that does justice to ESD
requirements.
Non-observance of warning notices can result in death, severe personal injury or
considerable property damage.
You should know the order and factory numbers of your unit when consulting the service department. You will
find these numbers and other important data on the rating plate of the unit.
8.1 Maintenance recommendations
The fans are designed for a service life of 35,000 hours (Size C) and 40,000 hours (Size E, H and K) at an
ambient temperature of T
A
= 40 °C. To guarantee the availability of the unit at all times, the fans must be
replaced in good time.
AoteWell Automation Sales Team
Buy Siemens PLC HMI Drives at AoteWell.com
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