Preparing The Ac Connection - Steca Grid 8000 Bedienungsanleitung

8.3

Preparing the AC connection

8.3.1 AC and DC connection diagram
1 2
+ +
– –
Fig. 7: Connection diagram of the inverter

Photovoltaic generator 1

Photovoltaic generator 2 (optional)

Photovoltaic generator 3 (optional)

Photovoltaic generator 4 (optional)
8.3.2 Line circuit breaker
Information on the required line circuit breaker and the cables to be used between the inverter and
the line circuit breaker is provided in Section 14.2, p. 78. See also Fig. 7, p. 59.
8.3.3 Residual current circuit breaker
Unless otherwise specified by the local installation regulations, installation of an external Type A
residual current circuit breaker is sufficient.
8.3.4 Isolation transformer
 If an isolation transformer is required then it must be connected as shown in Fig. 8.
Danger
Risk of death by electrocution!
• In the connection diagram illustrated in Fig. 8, the primary and secondary sides of the isolation
transformer are not galvanically isolated!
• If connection  is missing, the isolation monitoring of the inverter is not functioning correctly.
2 1
Fig. 8: Connection diagram of the isolation transformer
744.378 | 12.13
3 4
DC+ 1
DC+ 2
DC+ 3
DC+ 4
+ +
– –
DC– 4
DC– 3
DC– 2
DC– 1
1 3
L1
L2
RCD
L3
N
PE
5
6
RCD

Inverter

Residual current circuit breaker
(RCD = Residual Current Device)

Line circuit breaker
4 1 5 1

L1

L2

L3
N

1 PE
1

7
L1
L2
L3
N
PE
N-PE connection
Inverter
Residual current circuit breaker
(RCD = Residual Current Device)
Isolation transformer
Grid
EN
59