INSTRUCTION:
The contents of following sections are applicable to all the CPS
SCA36/50/60KTL-DO/US-480 3-Phase transformerless string
inverters.
2.1 Inverter for grid-tied PV systems
CPS SCA36/50/60KTL-DO/US-480 3-Phase transformerless string inverters
are designed for use with an UNGROUNDED PV array in carport,
commercial rooftop, and large utility scale PV grid-tied systems. The system
is generally made up of PV modules, a 3-Phase String Inverter with a fused
combiner/disconnect, and AC power distribution equipment (Figure 2-1). The
inverter converts the available DC energy from the PV modules to AC power
by synchronizing the output current to the same frequency and phase as the
AC grid. All or part of the AC power is supplied to local loads, and the
surplus power is exported to the electric utility grid.
Figure 2-1: Grid-tied PV System
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