Installation and operation manual
IM-S2-UX-EN-V1.4
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F)
Push the AC terminals along the rail to the inside of the inverter then tighten the screws under rack. Tighten
the 4 screws of AC terminal cover and tighten the AC entry cap nut (as shown in figure 5.21).
NOTICE! It is important that the AC wires are connected to the right terminals as indicated by
the “L”, “N” and “Earthing” symbols on each AC connector.
In some countries a second protective conductor is required as a matter of principle. In each
case, observe the applicable regulations for the site.
The AC connection to the electrical distribution grid must be performed only after receiving
authorization from the utility that operates the grid.
Always use separate fuses for consumer load. Use dedicated circuit breakers with load switch functionality for
load switching.
DANGER! No consumer load should be applied between the mains circuit breaker and the
inverter.
5.3
Additional Protections
To protect the inverter's AC grid connection conductors, Autarco recommends installing breakers that will
protect against overcurrent. The following table defines OPCD ratings for each model;
Inverter
Rate Voltage (V)
Rated Output (kW)
OPCD: Current for
protection device (A)
S2.UX40000(S)
400V
40
80
S2.UX50000(S)
400V
50
100
S2.UX60000(S)
400V
60
100
S2.UX50000-HV(S)
480/500V
50
80
S2.UX60000-HV(S)
480/500V
60
80
S2.UX70000-HV(S)
540V
70
90
