142 Commissioning instructions
Manual Energy Storage Inverter ESI-S
8.5.1 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
compensation and balancing. After the procedure has finished, the user has to
reprogram these parameters into the inverter.
8.5.2 Manual CT detection procedure
Refer to
Section 7.9.3.3
for guidelines on how to enter data when using the manual CT
setup.
The following procedure will allow you to check the CT connection. This step only has to
be executed if the CT setup could not be detected automatically. For ESI-S consisting
of more than one unit, it is necessary to check the CT connections for each individual
unit.
WARNING: The secondary circuit of a loaded CT must never be opened. Otherwise
extremely high voltages may appear at its terminals which can lead to physical danger
or destruction of the CT.
8.5.2.1 ESI connection diagram
shows the standard connection diagram for the ESI (Cf.
Section 7.9.2
). It must
be noted that:
−
The CTs must be on the supply (line) side of the ESI
−
The CT monitoring a phase must be connected to the inverter CT terminal
dedicated to the same phase
−
One secondary terminal of the CT must be earthed
