PVI13KW Installation and Operation Manual
DOC-020028 rev 006
13
installations) for each positive lead of each PV string. Connect to each fuse and
torque screws to 12 in–1b (1.3Nm). This fuse and wire rating must be compatible
with PV module fuse and short-circuit current rating per NEC 690. (A maximum of
8 AWG copper wire can be used.) The negative PV string connections are made to
negative terminal block. Torque screws to 35 in–1b (13.5Nm). 4 AWG
(recommended) DC equipment ground should be connected to the ground bar or if
multiple 12-8 AWG DC equipment grounds meet NEC requirements for the
installation, these can be terminated on the ground bar.
If the inverter is not equipped with an integrated fused PV combiner, a minimum
wire size of 6 AWG, 90
o
C (194
o
F) copper wire must be used. (A maximum of 2
AWG copper wire can be used for positive & negative conductors and 4 AWG DC
equipment ground. It is also possible to use larger than 2 AWG + & - conductors if
NEC and local code allows it for your installation and configuration. The + & -
terminal block is rated to fit up to 1/0 AWG.) Torque screws to 120 in- lb.
The installation of a Delta lightning surge arrester or other UL listed arrester of the
correct specification is recommended. This can be installed on the outside of the
DC disconnect and wired using the manufacturer's directions. This device gives
important added protection from indirect lightning strikes and resulting surges that
provide protection beyond the inverter's UL1741 requirements. An additional
arrestor can also be placed on the AC disconnect.
As with all PV systems, a Grounding Electrode Conductor must be installed per
UL690.47 (and 250.166). This conductor should be sized according to these NEC
requirements. This conductor should be terminated on the ground bar in the DC
disconnect.
WARNING:
The wiring connections of the inverter to the DC-voltage from the PV
strings and the AC-voltage of the utility must be done with the AC and DC
disconnects off, building AC source circuit panel/breaker off and the PV module
strings disconnected (or covered up).
•
Connect the building, 3-phase conductors and AC equipment ground at AC
disconnect “LINE” terminals and ground bar.
•
Connect the PV strings to the DC disconnect enclosure fuses (+) and
negative terminal (-) if the inverter is equipped with fused PV combiner or
connect the (+) and (–) PV array feeds to (+) and (–) terminals in the
inverter DC disconnect if the inverter is not equipped with a fused PV
combiner. Connect the DC equipment ground to the ground bar.
•
Connect PV modules and strings or uncover them.
•
Verify proper AC and DC voltages and polarity. Turn on the inverter by
switching building/utility 3-phase breakers ON then turning on inverter’s
AC disconnect, then DC disconnect.
Содержание PVI 13KW
Страница 9: ...PVI13KW Installation and Operation Manual DOC 020028 rev 006 9 Fig 2 2a PVI13KW Mounting Diagram ...
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Страница 41: ...PVI13KW Installation and Operation Manual DOC 020028 rev 006 41 Appendix D ETL early use letter ...
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