11
Position
Description
A
PV modules
B
DC load circuit breaker
C
Astronergy Inverter
D
AC load circuit breaker
E
Energy meter
F
Utility grid
5.2 Safety
The Astronergy Inverter must be connected to the AC ground from the utilityvia the Ground Terminal (PE)
before wiring to the grid or PV panel!
5.3
Connecting to the grid (AC utility)
Suggestion:
It is suggested that each inverter should have an individual AC breaker in order that the inverter can be
disconnected safely.
Note:
The PV-Inverter system capacitance can’t over 13.8KVA, because the inverter’s displacement factor adjust function had
accorded to VDE-AR-N 4105. According to CEI 0-21, when the system capacity is smaller than 6KW, SPI needn’t to be modified,
PF value can be set to 0.95. When the system capacity is bigger than 6KW, SPI need to change to be ‘External’, PF value can be
set to 0.9.
The inverter is equipped with an integrated all-pole sensitive residual current monitoring unit. The inverter can automatically
distinguish between residual currents and “normal” capacitive leakage currents.