198 Maintenance instructions
Manual Energy Storage Inverter ESI-S
Table 57: IGBT cooling fan related items description
10.5 DC capacitor change
The inverter DC link contains electrolytic DC capacitors. Their lifespan is up to 8 years
when the inverter option ‘line to neutral balancing’ is not used and up to 5.5 years when
the full capacity of the inverter is used for line to neutral balancing. This data assumes
that the inverter is used within the ABB approved technical specifications (Cf.
Chapter
).
It is not possible to predict a capacitor failure. Contact your ABB service provider if
capacitor failure is suspected. Replacement kits are available from ABB. Do not use other
than ABB-specified spare parts.
10.6 DC capacitor reforming
If the inverter has been non-operational for more than one year, the DC capacitors must
be reformed (re-aged) before use. Without reforming, the DC capacitors may be
damaged at start-up.
Stocked or non-operational units should be reformed once a year. The method described
here assumes that the inverter is stocked in a clean and dry environment.
To reform the capacitors,
−
Switch on the power supply to the inverter without starting the inverter for about
2 hours. Verify with the ESI-Manager the DC capacitor voltage and ensure that it
is charged to a couple of hundred volts.
−
Then, with all features deselected, start the system and leave it running for one
hour
−
The inverter is now ready for normal operation
If the inverter has been left more than 2 years without operation, please contact your
ABB service provider.
10.7 Servicing report
The Servicing report is designed to help the person in charge of servicing.
The report can be used for each individual unit of a multi-unit system.
Item Description
1
Cooling
fans
2
Fan
assembly
fixation
holes
3
Fan
electrical
connections