PVI 3000S, 4000S, 5000S, 5300 Series Inverters
Installation and Operation Manual (Rev A)
30
The wiring box of the PVI 3000S-5300 inverter is designed with a pair of DC terminal blocks which
support up to four (4) independent PV strings to be fused and connected in parallel in the wiring
box and then fed into the inverter (or 3 fused inputs in the case of the PVI 3000S). The PVI 3000S-
5300 inverter is shipped with up to four (4) 15A, 600Vdc PV string fuses in the wiring box for the
PV strings. The PVI 3000S is shipped with three (3) 15A, 600Vdc PV string fuses. However, the size
of the PV string fuses shall be determined by the electrical ratings of the PV module and National
Electrical Code (NEC) requirements.
IN NO CASE SHALL FUSES OF LARGER THAN 15A BE USED
FOR THE PV STRING FUSES.
Please refer to Section 7.2 for the replacement of the PV string fuses.
15A fuses are shipped standard with every inverter. The fused combiner also is able to be
bypassed using the provided bypass terminals (2 positions), which can also be used to connect
the DC Lightning Arrestors.
There are two (2) terminals, labeled “Ungrounded (+)” and “Grounded (-)”, per PV string located
in the wiring box used for the DC connections as shown in Figure 4.3.2. The DC equipment ground
wire shall be connected to a screw on the ground bar labeled
in the wiring box of the PVI
3000S-5300 inverter. All the screws shall be tightened with a torque of 15.6 in-lb (1.7Nm)
Figure 4.3.2 – DC Terminal Block for DC Wiring Connections
Figure 4.3.3 – PVI 4000S-5300 Supports Four (4) PV String Fuses
Connect to PV+ if
fuse bypass is
desired
Connect to PV+
Connect to PV-