ZCS Azzurro HYD 3000 ES, Быстрое руководство по установке

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CHANGE-OVER SWITCH
In case of maintenance of the components of the photovoltaic system or in case of an inverter that cannot be used,
it is recommended to install a change-over switch so that the loads normally connected to the inverter's load line
can be fed directly from the grid.
DOUBLE SWITCH CONTACTOR
For subsidised systems, a double switch contactor can be installed. This device will ensure that the critical loads
are normally powered by the grid, they will be powered by the EPS LOAD line of the inverter only in the event of a
power failure thanks to the change-over of the contactors
230V
230V
If the alternating voltage supplied by the grid is present (normal operating condition), both the standard loads of
the system and the priority or critical loads are supplied by the grid without the need to use a double switch-over
contactor. This operation is shown in the figure below.
It should also be
noted that the
LOAD output is
always energised,
even when the
mains voltage is
present.
Position 1 → Priority loads connected and
powered by the inverter's LOAD line
Position 0 → Priority loads not powered by
the inverter or by the grid
Position 2
→ Priority loads connected and
powered by the grid
19.4 EPS MODE (OFF GRID) - OPERATION
Double
switch
contactor
CHANGE-OVER
SWITCH
CRITICAL LOADS
GRID AND
UTILITIES
Note: If the hybrid inverter is to be installed under different conditions from those shown in the diagrams above,
contact technical support to check whether it is feasible.
NOTE: For the conditions described above, in the event of a power failure, the part of the system powered by
the inverter's LOAD port behaves like an IT system
Critical
Loads
LOAD
GRID
0
0