All-Pin Separation Cabling Variant E.g. Germany, France, Spain - Fronius Primo GEN24 3.0 Plus Operating Instructions Manual

The following points regarding cabling must be considered:
-
-
-
-
-
-
All-pin separation Circuit Diagram
cabling variant The Circuit Diagram for the 2-pin double separation - e.g. Germany, can be found in the
e.g. Germany, appendix to this document on page 149.
France, Spain The Circuit Diagram for the 2-pin single separation - e.g. France and Spain, can be
found in the appendix to this document on page 150.
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 at all pins from
the grid by contactors K1 and K2; an earth connection is only established for these cir-
cuits. The rest of the home network is not supplied with power in this case.
76
The main contacts of contactors K1 and K2 must be installed between the Fronius
Smart Meter and the inverter and the residual current circuit breaker of the backup
power circuits.
The supply voltage for contactors K1 and K2 is provided by the public grid and must
be connected to phase 1 (L1) after the Fronius Smart Meter and fused accordingly.
An NC contact for the relay K3 interrupts the supply voltage to contactors K1 and
K2. This prevents the backup power network of the inverter from being switched to
the public grid.
The NO contact of relay K3 gives feedback to the inverter on whether the locking
was successfully performed by relay K3.
Additional inverters or other AC sources can be installed in the backup power circuit
after the main contacts of K1 and K2. The sources are not synchronised to the net-
work of the inverter because this backup power network has a frequency of 53 Hz.
The use of contactor K2 is optional in Australia.