Fronius Primo GEN24 3.0 Plus, Operating Instructions Manual, Page: 75 / 160

Connecting backup power - Full Backup
Safety The examples given in this document (in particular cabling variants and Circuit Dia-
grams) are suggestions only. These examples have been carefully developed and
tested. They can therefore be used as a basis for real-life installation. Anyone following
or using these examples does so at their own risk.
IMPORTANT!
The valid national laws, standards and provisions, as well as the specifications of the rel-
evant grid operator are to be taken into account and applied.
It is highly recommended to coordinate the concrete examples implemented and in par-
ticular the specific installation with the grid operator to obtain their explicit approval. This
obligation applies to system constructors in particular (e.g. installers).
The examples suggested here show a backup power supply with or without an external
protection relay (external grid and system protection unit). Whether an external protec-
tion relay must be used or not is the decision of the respective grid operator.
IMPORTANT!
No uninterruptible power supply (UPS) must be operated in the backup power circuit.
The Installation and Operating Instructions must be read carefully prior to use. If anything
is unclear, contact your vendor immediately.
WARNING!
Danger from incorrect installation, commissioning, operation or incorrect use.
This can result in severe personal injury/damage to property.
▶
Only trained and qualified personnel are authorised to install and commission the
system, and only within the scope of the technical regulations.
▶
The Installation and Operating Instructions must be read carefully prior to use.
▶
If anything is unclear, contact your vendor immediately.
Cabling variants
including backup
power circuits
with 1-pin separa-
tion e.g. Austria
or Australia Circuit Diagram
The Circuit Diagram for the 1-pin double separation - e.g. Austria, can be found in the
appendix to this document on page
147 .
The Circuit Diagram for the 1-pin single separation - e.g. Australia, can be found in the
appendix to this document on page
148 .
Cabling of backup power circuit and non-backup power circuits
If not all the loads in the home need to be supplied in a backup power situation, the cir-
cuits need to be divided into backup power circuits and non-backup power circuits. The
total load of the backup power circuits must not exceed the nominal output of the
inverter.
The backup power circuits and non-backup power circuits must be fused separately
according to the required safety measures (residual current circuit breaker, automatic cir-
cuit breaker, etc.).
In backup power mode, only the backup power circuits are disconnected from the grid by
contactors K1 and K2, 1-pin. The rest of the home network is not supplied with power in
this case.
75
EN