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Physical Characteristics
152379 Rev C
1–7
Main Inverter Enclosure
The PV100S Main Inverter Enclosure is NEMA-3R rated and contains the power
distribution panel, the converter control unit (CCU2), and power electronics
matrix. Also found within the Main Inverter Enclosure are some of the system
protection devices (such as the sense and control power fuses).
Power Distribution Panel
This panel contains many of the Electromechanical, protective, and control power
components necessary to support the operation of the PV100S.
Converter Control Unit (CCU2)
The CCU2 is a Digital Signal Processor (DSP) based control board that performs
numerous control and diagnostic functions associated with PV100S operation. Its
most significant tasks are control of PV100S electromechanical components and
power electronics converters, signal conditioning for high voltage signal inputs
and communication with the Universal Front Panel Control Unit, and system
sensors. The CCU2 also contains the necessary DC power supplies to support its
operation.
Power Electronics Matrix
The power electronics converter is located at the top of the PV100S main inverter
enclosure. The matrix is comprised of six switching transistors (IGBT’s),
transistor gate drive electronics, a laminated power bus, DC capacitor bank, and
an aluminum extrusion heatsink with a cooling fan. The fan is located above the
matrix heatsink.
The PV array is tied logically to the matrix DC bus within the DC interface
enclosure. The embedded CCU2 control unit manages the transfer of power
between the DC bus and the utility grid.
Inductor Enclosure
The Inductor Enclosure is NEMA-3R rated. It contains the necessary filter
components to ensure the PV100S line current meets IEEE-519 (1992, standard
Practices and REquirements for Harmonic Control in Electrical Power Systems)
and UL 1741 (2001, Static Inverters and Converters for use in Independent Power
Systems) harmonic distortion requirements. Mounted on the right side of the
lower enclosure is an inductor fan to allow cooling of the line filter components
within. This enclosure also serves as the mounting base for the PV100S main
enclosure.
Summary of Contents for PV100S-208
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