40
Figure 3-23 Internal Connection Points within the RSD wirebox
（only for CPS SCA25KTL-DO/US-208）
⑤ DC Input fuse holder/terminal
⑥ DC SPD (Surge Protective Device)
⑦ Internal ground terminal(s)
⑧ AC output terminal block
⑨ Negative DC input busbar
⑩ Rapid Shutdown transmitter
3.3.3 DC Connection
3.3.3.1 Working mode
These inverters are factory configured with three MPPTs which are
electrically divided into separate PV input zones: PV Input-1, PV Input-2,
and PV Input-3. Each 5-string PV input zone operates as a separate and
independent Maximum Power Point Tracker (MPPT). Independent mode
can be very useful for sites with partial shading of the array or with arrays
consisting of different tilt or azimuth. Each MPPT employs a method known
as P&O (perturb and observe) for seeking and tracking the maximum
power point along the I/V curve of the PV array. During operation each
MPPT will make small adjustments to the PV voltage and then execute a
To Next Page
Loading...
