ABB MICRO-0.25-I-OUTD-US-208/240, Product Manual

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7 - Appendix
B
lock diagram
The diagram at right summarizes the layout of the
MICRO inverter. The main blocks are the DC-DC
input converter (the “boost” section) and the DC-
AC output inverter. Both work at a high switching
frequency, are small and relatively light.
The inverter is equipped with a single input converter
with Maximum Power Point Tracking (MPPT) to
which it is possible to connect a single photovoltaic
module. This means that the modules connected to
the MICRO inverters could be installed in different
positions and orientations. This inverter is equipped
with a high-frequency transformer, in other words
with galvanic isolation of the primary (DC side) from
the secondary (AC side), while maintaining very
high performance in terms of output and energy
export. This type of circuit allows for the grounding
of the positive input pole.
The inverter is controlled by two independent
DSPs (Digital Signal Processors) and a central
microprocessor. The connection to the power grid
is thus kept under control by two independent
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norms both for power supply to the systems as well
as security.
The wireless communication system inside the MI-
CRO inverter transmits the information to the CDD
device that analyzes and manages all system data.
All this guarantees optimal operation of the entire
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conditions, always in full compliance with the rel-
evant directives, standards and provisions.