160 Commissioning instructions
Manual Energy Storage Inverter ESI-S
full redundancy for the communication features in master-master inverters, this
function has to be cabled to all master units and all the ESI-Managers have to be
set up accordingly.
If the CTs have been set up correctly at this stage or if CTs are not required, go to step
6 (
Section 8.7
If there is a need to do a manual check of the CT connections, go to step 5 (
Section 8.6
8.6 Step 5: Automatic and manual CT detection procedure (if
required)
WARNING: Do not inverter harmonics or do reactive power compensation/balancing
when the CTs have not been set up correctly. Failure to adhere to this guideline will
result in erratic inverter operation.
Refer to
for the CT selection and installation guidelines.
WARNING: Before programming or detecting the CTs, make sure that:
- The CTs have been connected to the inverter CT terminal X21. For multi-units
configurations all the units of a system have to be supplied with the same CT
information (daisy chain principle with return path as shown in
- All shorting links in the CT path have been removed (i.e. on the CTs, on the inverter
CT terminal X21 …)
CT shorting links are provided with the ESI-S for servicing purposes, but they are not
installed by default on the X21 terminal.
The CT settings can be detected with the automatic CT detection feature or in a
conventional way. The automatic CT detection approach allows compensating for
physical connection errors in software. For multi-unit functions, the automatic CT
detection feature will automatically try and detect the CT-connections for the different
units.
8.6.1 Automatic CT detection procedure
The automatic CT detection procedure and the precautions to take when using it are
explained in detail in
discusses a way to check the CT installation if the automatic CT detection
procedure is not used or does not find the correct results.
NOTE: When the automatic CT detection procedure is started, the inverter will
automatically deactivate all user requirements for filtering, reactive power