Connecting Backup Power - Full Backup; Safety - Fronius Primo GEN24 3.0 Operating Instructions Manual

Connecting backup power - Full Backup

Safety

The examples given in this document (in particular cabling variants and Circuit
Diagrams) 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 relevant grid operator are to be taken into account and applied.
It is highly recommended to coordinate the concrete examples implemented and
in particular the specific installation with the grid operator to obtain their explicit
approval. This obligation applies to system constructors in particular (e.g. in-
stallers).
The examples suggested here show a backup power supply with or without an ex-
ternal protection relay (external grid and system protection unit). Whether an ex-
ternal protection 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.
Danger from incorrect installation, commissioning, operation or incorrect use.
This can result in severe personal injury/damage to property.
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Cabling variants Circuit Diagram
including backup The Circuit Diagram for the 1-pin double separation - e.g. Austria, can be found
power circuits in the appendix to this document on page 179.
with 1-pin separ- The Circuit Diagram for the 1-pin single separation - e.g. Australia, can be found
ation e.g. Austria in the appendix to this document on page 180.
or Australia
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 circuits 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 separ-
ately according to the required safety measures (residual current circuit breaker,
automatic circuit 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 sup-
plied with power in this case.
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WARNING!
Only trained and qualified personnel are authorised to install and commis-
sion 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.