Service and maintenance
5.2 Forming
Power Module PM330
Hardware Installation Manual, 10/2016, A5E32844552B AD
59
5.2
Forming
Forming the DC link capacitors
If converters were not operational for longer than a year (if possible: storage temperature
< 40 °C), the DC link capacitors should be formed. The date of manufacture and therefore
the storage time can be determined based on the Power Module serial number. You can
take the details about the measures required when forming from the following diagram.
Storage times less than 1 year: No measures required
①
Storage times of between 1 and 2 years: Connect voltage for one hour before switching on
②
Storage times of between 2 and 3 years: Form corresponding to the curve before switching on
③
Storage times of 3 and more years: Form corresponding to the curve before switching on
Figure 5-1
Measures when forming the DC link capacitors
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