Ac Connection; Anti-Islanding; Dc Arc Fault Circuit Interrupter (Afci); Figure 4-17: Ac Connection - Delta M42U Operation And Installation Manual

4.3.7.9 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.

4.3.7.10 Anti-Islanding

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).

4.3.7.11 DC Arc Fault Circuit Interrupter (AFCI)

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".
EPO
► AC Connection
Anti -islanding
Max. Power

Figure 4-17: AC Connection

EPO
AC Connection
Anti -islanding
►
Max. Power
Figure 4-18: Anti-Islanding Display screen
►
AFCI
Return to Factory
Figure 4-19: DC AFCI Display screen
Normal Close
3P3W
ON
46000W
Normal Close
3P3W
ON
46000W
ON
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Commissioning