Delta M42U

Figure 4-17: AC Connection
The AC Connection sub-menu provides user a choice of AC connections:
· 3P3W - indicates the inverter connection to an AC grid is as a 3-phase/3-wire
device (default setting) No Neutral is required.
· 3P4W - indicates the inverter connection to an AC grid is as a 3-phase/4-wire
device; Neutral connection required.
4.3.7.9 AC Connection
-islanding
Max.
EPO
AC Connection
Anti
Power
►
Normal Close
3P3W
ON
46000W
Figure 4-18: Anti-Islanding Display screen
Anti-islanding protection is a way for the inverter to sense when there is a problem
with the power grid, such as a power outage, and shut itself off to stop feeding
power back to the grid. Delta anti-islanding function is based on the Sandia
Frequency Shift algorithm. The default setting depends on grid code (always
ON in NA).
4.3.7.10 Anti-Islanding
-islanding
Max.
EPO
AC Connection
Anti
Power
►
Normal Close
3P3W
ON
46000W
Figure 4-19: DC AFCI Display screen
AFCI (Arc Fault Circuit Interrupter) is an advanced circuit breaker that breaks
the circuit when it detects a dangerous electric arc in the circuit it protects to
prevent electrical fires. The default setting of AFCI is “ON”.
4.3.7.11 DC Arc Fault Circuit Interrupter (AFCI)
AFCI
Return to Factory
►
ON
Commissioning
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