148 Commissioning instructions
Manual Energy Storage Inverter ESI-S
8.9 Step 8: Set up the user requirements
If everything goes well at this stage, the user requirements for harmonic filtration and
reactive power compensation/balancing, if required, can now be set up. Both main and
auxiliary settings can be programmed if desired.
By default the inverter is set up to take into consideration the main settings only.
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Select the desired inverter mode
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Select the harmonics and the curve level
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Select the reactive power and balancing settings
Background information on all the items discussed above is given in
At this stage, verify the functioning of the settings made for the digital I/O if possible
(e.g. remote control, local start/stop buttons).
Remarks:
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Refer to
for troubleshooting problems
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inverter running at 100% load while RMS current rating is not attained
Under exceptional conditions it is possible that the inverter is showing a 100%
load indication whereas its nominal RMS current rating is not yet attained. This is
because the inverter has reached an operating limit other than the RMS current
limit. Possible other limits are:
•
Temperature limit due to a too high ambient temperature or a failing
cooling system
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Peak current limit due to an a-typical peak current requirement of the load
•
Peak voltage limit due to an a-typical DC-link voltage requirement of the
load or due to a high network voltage
Under all these conditions, the inverter will run in limited mode and may not
attain 100% of its nominal current rating.
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Harmonics put in ‘standby’ by the system:
When selecting a harmonic that has not been selected before, the inverter will
identify the network characteristics for this harmonic. After this process, the
inverter will launch the filtering process for the component considered. If during
the network identification process for a given harmonic a special (problematic)
condition is encountered, the system puts the component in ‘standby’. In that
case the harmonic selected is not filtering for the time being. Special network
conditions include extremely high impedance of the supply network or extremely
low impedance towards the load. When consulting the harmonic selection table
of the ESI-Manager, harmonics put in ‘standby’ can be recognized by the label ‘S’
that is displayed in the harmonic selection column (which reads otherwise either
‘Y’ or ‘N’). The following possibilities exist to bring a harmonic out of standby:
