Dc Connections From The Pv Array And Ac Connections To The Grid; Grounding - Solectria Renewables PVI 50KW Installation And Operation Manual

Installation and Operation Manual (Rev A)
4 DC Connections from the PV Array and AC Connections to the Grid
WARNING: All electrical installations shall be performed in accordance with applicable
local, state, and national electric codes.
WARNING: Only connect the DC and AC power and grounding wires with the AC and DC
disconnect switches off and the circuits isolated from AC power from the grid and DC
power from the array.
WARNING: Make sure to connect the inverter and other exposed metal equipment in
the system to the grounding electrode system through the installation of the
Grounding Electrode Conductor(s) and Equipment Grounding Conductors before
proceeding to connect any DC or AC power wires.
WARNING: Only make AC connections directly to the lugs within the AC disconnect
switch and DC connections to the lugs within the DC disconnect switch.
NOTE: All grounding and power wiring terminals are dual rated for Copper and
Aluminum Wire. When using aluminum wire exercise best industry practices to ensure
a reliable connection; thoroughly clean the conductor just prior to making the electrical
connection and use an oxide inhibitor to prevent the formation of aluminum oxide.
NOTE: Grounding and power wiring terminals are rated to 167°F (75ᵒC).
NOTE: When conduit hubs are used for DC and AC cable entry in an outdoor or wet
location, rain‐tight or wet location hubs that comply with the requirements in the
Standard For Fittings For Conduit and Outlet Boxes, UL514B, are to be used.
AC grounding and power connections are made in the AC disconnect switch of the inverter. The
type of AC disconnect switch provided with the inverter depends on the inverter power rating,
output voltage, and fusing specified by the customer (i.e. fused or unfused).
DC grounding and power connections are made in the DC disconnect switch of the inverter. The
type of DC disconnect switch provided with the inverter depends on the inverter power rating
and DC overcurrent protection specified by the customer (i.e. fuses or breakers, amperage, and
quantity).
4.1 Grounding
The PVI 50‐100KW inverter has grounding connection points in the DC and AC disconnect switches
as listed below. These points are used for Grounding Electrode Conductor (GEC) and Equipment
Grounding Conductor (EGC) connections. PV systems have EGC and GEC conductor requirements
DOCR‐070233 Page 14 of 92
PVI 50‐100KW Series Inverters