Preparing The Ac Connection - Steca StecaGrid 3000 Installations- Und Bedienungsanleitung

EN
8.3 Preparing the AC
8.3.1 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. 85.
8.3.2 Residual current circuit breaker
If the local installation regulations require the installation of an external residual current circuit
breaker, then a Type A residual current circuit breaker as per IEC 62109-1, § 7.3.8. is sufficient.
8.3.3 Wiring the AC plug
Danger
Risk of death by electrocution! Observe the warning notes in Section 8.1, P. 64!
Grid voltage 220 V ... 240 V
 Wire the AC plug provided as described in P. 134 onwards.
Grid voltage 100 V ... 127 V
Danger
Risk of death by electrocution! Never connect one of the phases L1, L2 or L3 to PE or N on the mains
grid side.
Note
With a mains grid voltage of 100 V ...127 V, the inverter can be connected between the L1, L2 and
L3 external conductors as follows:
2-phase mains grids
• N and L are connected between the L1 – L2 external conductors at the inverter side. See  and 
in Fig. 8.
• One of the two connected external conductors is connected to PE at the inverter side. This con-
nection can be made within the AC plug or in an external junction box.
• Fig. 8 shows an example of an inverter-side connection between L1 and PE:
Above: Connection  in the AC plug 
Below: Connection  in an external junction box )
3-phase mains grids
• N and L are connected between the L1 – L2 or L1 – L3 or L2 – L3 external conductors at the in-
verter side.
• Connect the external conductor on the inverter side to PE: as above.
• Fig. 8: as above.
The external conductor voltages are shown in Fig. 9.
1. Wire the AC plug supplied to match the selected external conductors, as described on P. 134
onwards. Do not yet close the AC plug.
2. Connect one of the two connected phases to PE at the inverter side. Make this connection inside
the AC plug or use an external junction box; see Fig. 8.
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connection
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