Service And Maintenance; Replacing Components With Internal Liquid Cooling (In Preparation); Reforming The Dc Link Capacitors - Siemens SINAMICS S120 Equipment Manual

Service and Maintenance

15.1

Replacing Components with Internal Liquid Cooling (in Preparation)

Replacing components essentially depends on the design of the liquid installation. With a
serial connection system, the entire circuit is interrupted when components are replaced.
With a parallel connection system, appropriate valves in the cooling pipes (not included in
the component) mean that individual components can be removed from the line-up without
the need to interrupt the cooling circuit.
To make it easier to replace components, we recommend that every component is
connected through self-closing valves.
Note
If the connectors are removed from the component, you must make sure that you use a new
seal.
15.2

Reforming the DC link capacitors

If the Active Line Module, Smart Line Module and Motor Module have not been used for
more than two years, the DC link capacitors must be re-formed. If this is not carried-out, the
units could be damaged when the power supply voltage is connected.
If the cabinet is commissioned within two years of its date of manufacture, the DC link
capacitors do not need to be reformed. The date of manufacture can be taken from the serial
number on the rating plate.
Note
It is important that the storage period is calculated from the date of manufacture and not from
the date that the equipment was shipped.
Booksize cold-plate power units
Manual, (GH4), 03.2007, 6SL3097-2AJ00-0BP4
CAUTION
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