Installation and Operation Manual Page 19 of 104
(PVI-3.8/4.6-I-OUTD-US Rev.: 1.1)
The block diagram shows an AURORA PVI-3.8/4.6-I-OUTD with two independent
input DC-DC converters; each converter is dedicated to a separate array with
independent Maximum Power Point Tracking (MPPT) control. This means that the
two arrays can be installed with different positions and facing different directions.
Each array is controlled by an MPPT control circuit.
Thanks to AURORA’s high efficiency and large heat dissipation system, this inverter
provides operation at maximum power in a broad range of ambient temperatures.
The inverter is controlled by two independent Digital Signal Processors (DSP) and one
central microprocessor.
This way, network connection is controlled by two independent computers in full
compliance with electrical power supply and safety regulations.
The AURORA inverter operating system communicates with the related parts to
perform data processing.
This guarantees optimal performance levels of the whole complex and high yield in all
insulation and load conditions, always in full respect of directives, laws and
provisions.
2.4 Protective Devices
2.4.1 Anti-Islanding
When the local distribution network fails due to a fault or when the equipment is shut
down for maintenance operations, the Aurora inverter should be physically
disconnected under safety conditions, so as to protect any personnel working on the
network, all in full compliance with the applicable national standards and laws. To
avoid possible islanding operations, AURORA is provided with an automatic
disconnection protection system called 'Anti-Islanding'.
The AURORA PVI-3.8/4.6-I-OUTD model is equipped with a state-of-the-art anti-
islanding protection system certified to the following standards and regulations:
CSA-C22.2 N.107.1-01 UL Std N.1741
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