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118 The ESI-Manager user interface
Manual Energy Storage Inverter ESI-S
In the main screen of inverter characteristic setting, a warning message appears and by
following the
button, the set-up screen appears. The warning states that if there
is a mismatch between the selection of inverter connection type (3 or 4-wire) and the
actual cable connection to the ESI-S (neutral cable not connected or otherwise) the
inverter may refuse to start. Following a choice is made by the user; the inverter makes
a “reset” of the system.
The ESI-S inverter may be connected in 3-wire mode (only phases connected) or in 4-wire
mode (both phases and the neutral connected). Also the inverter may consist of up to 4
parallel hardware units (8 for the ESI-I and ESI-M range) of the same rating. For ESI-I and
ESI-M inverters, unequal ratings are also allowed, please refer to the respective inverter’s
detailed manual. The inverter connection mode must be adapted in software to the on-
site configuration. In addition, when the inverter configuration is changed on site (e.g.
going from one connection mode to another); the inverter setup has to be adapted
accordingly.
WARNING: Setting up a wrong inverter configuration (possible in case of ESI-S range)
may lead to inverter malfunction. This should only be done by experienced
commissioning engineers.
When entering the ‘Inverter characteristics’ window, first the connection mode has to be
defined:
−
3-W: choose this mode when only the phases are connected. In this case, the
inverter can inverter harmonics that are flowing between phases and make phase
to phase balancing but cannot inverter harmonics in the neutral nor make line to
neutral balancing.
−
4-W: choose this mode when both the phases and the neutral are connected. In
this case, the inverter can inverter harmonics between phases as well as
harmonics in the neutral, and can perform balancing of loads connected between
phases as well as connected phase to neutral.
Further note that:
WARNING: All hardware units in a master-slave inverter arrangement must have the
same rating in ESI-S range. Combining hardware units of different ratings in the same
inverter panel will lead to hardware failure and/or inability for the inverter to start up.
In the same screen, the user needs to enter the rating of each inverter units connected
together. For ESI-S range, the unit rating needs to be identical whereas for ESI-M and
ESI-I range, unequal rated inverter units can operate together as well.
Remarks: