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10. Auxiliary grid/genset connection
Depending on the installation's requirements and characteristics, there can be an auxiliary electric distribution grid
or generator. This chapter explains the requirements and process for connecting the auxiliary grid or generator to
the unit.
DANGER
Before proceeding with the grid connection, identify its TT or TN grounding system. Danger of electrocution due
to an incorrect connection of the neutral conductor.
INFO
In this unit it is possible to use the TT and TN grounding systems. The type of system must be selected through
the configuration.
If the neutral conductor is connected incorrectly, the critical load ground connection will not work. In TT systems,
the internal transfer relay must disconnect the neutral conductor between the critical loads and the auxiliary
grid/genset when the inverter is not connected to the auxiliary grid/genset. However, in TN systems the neutral
conductor must be the same one between the critical loads and the auxiliary grid/genset, therefore it cannot be
disconnected.
10.1. Safety instructions for connecting the auxiliary grid/genset
CAUTION
Before you start to make the connections, make sure there is no voltage in the inverter. Check that the
protections for the grid/genset, critical loads, storage system and PV array are open.
Do not switch on the power to the unit until you have successfully made the rest of the connections and the unit
is closed.
When carrying out the connections, respect the polarities marked on the electronic card.
10.2. Wiring requirements for connecting the auxiliary grid/genset
The wiring gauge for connecting the auxiliary grid/genset is specified in the following table:
Wiring gauge
Cable diameter
Wiring stripping length (L*)
L*
30
Auxiliary grid/genset connection
INGECON SUN STORAGE 1Play TL M
Up to 32 A
4 mm
2
11 ~ 17 mm
18 mm
ABH2014IQM01_A- Installation and Operation Manual
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