Installation manual

Installation
3–20 975-0601-01-01 Revision B
This manual is for use by qualified personnel only.
through the same knockout and conduit fittings, allowing any inductive currents
to cancel. For torque values, see Table A-6 on page A–6. For the location of
these terminals, see Figure 1-2 on page 1–5.
The Xantrex GT500 includes the ability to auto-sense and correct for a mis-
phased connection at the AC interface terminals. In the event the power
conductors from the utility are not phased correctly at the AC interface terminals,
the Xantrex GT500 will sense the discrepancy and automatically correct for a
clockwise (A-B-C) phase rotation.
The Xantrex GT500 interfaces with the DC photovoltaic array at TB3, TB4, and
TB5 (PV GND), located in the lower right side of the inverter assembly.
The TB3, TB4, and TB5 (PV GND) terminals require the use of an approved,
crimp-on type ring lug or an approved, compression-type lug rated for use with
the size, type, and ratings of cables used. When appropriate, keep these cables
together and pass cables through the same knockout and conduit fittings,
allowing any inductive currents to cancel. For acceptable torque values for the
tightening bolts used on terminals TB3, TB4, and TB5, see Table A-5 on page A–
5. For the location and polarity of these terminals, see Figure 3-20 on page 3–26
and Table 3-1 on page 3–26.
Conductor Termination
The Xantrex GT500 has terminals and bus bars for making all wiring connections
required for the installation. All AC and DC terminal connections must use copper
conductors only with an insulation rating of 90 °C (194 °F).
• For bolt size and torque values for AC terminals, see Table A-6 on page A–6.
• For bolt size and torque values for DC terminals, see Table A-5 on page A–5.
• For bolt size and torque values for the throat connection kit, see Table A-7
and Table A-8 on page A–6.
AC Interface The AC output line terminals (TB1-A, TB1-B, and TB1-C) in the transformer
assembly have six holes for bolts. These terminals require the use of crimp-on
type ring-terminals or compression-type lugs. See Figure 3-16 on page 3–22 for
the location of these terminals.
The equipment grounding terminal (TB2-ground) has four holes for bolts for
securing ground conductors terminated with crimp-on type ring terminals or
compression-type lugs. See Figure 3-16 on page 3–22 for the location of
this terminal.
WARNING
HAZARD OF FIRE
Do not connect the grounded power conductor from the PV array directly to
TB5 (PV GND). Doing so will bypass the ground fault detector and violate the
NEC.
Failure to follow these instructions can result in death or serious injury.