Technical data

6
 2 MPPTs: Dual and independent MPPT (Maximum Power Point Tracking)
enable maximum design flexibility and optimize energy harvest over the life
of the system
 High protection degree: NEMA 4 protection degree meets the needs of
both indoor and outdoor use;
 Intelligent Integration: Embedded DC/AC switches and up to 8 fused
string inputs eliminates the need for external combiner boxes and
simplifies installation.
2.3 Product protection functions
 Polarity reverse protection of DC input
 Short circuit protection
 DC input insulation against ground monitoring
 AC output voltage and frequency monitoring
 Leakage current against ground monitoring
 Monitoring of DC injection from AC output
 Anti-islanding protection
 Input and output over-voltage protection
 Input over-current protection
 Environmental temperature monitoring
 Module temperature monitoring
2.4 Circuit structure design
The basic schematic diagram of CPS SCA23/28KTL-DO/US-480 series
inverter is shown in Figure 2-2.
The input of PV modules passes through surge protection circuitry, DC
EMI wave filter, and the front-end boost circuitry to achieve maximum power
tracking and boost up voltages. The output of the inverter converts the DC
voltage to 3-phase AC voltage. The high frequency AC components are