Installation manual

Planning
2–4 975-0601-01-01 Revision B
This manual is for use by qualified personnel only.
Equipment Grounding Requirements
The equipment safety ground connection point for grounding the Xantrex GT500
enclosures is the ground terminal TB2 in the transformer assembly. That point
must be connected to ground in the installation in accordance with applicable
installation codes. A ground connection point TB5 (PV GND) is provided in the
inverter assembly for the PV array frame grounding conductors. If required by
local installation codes, a ground electrode conductor for either the AC or DC
system could also be required, and can be connected to TB2 or TB5.
Transformer Considerations
The Xantrex GT500 includes an internal isolation transformer. This transformer
has a 208 V Delta configuration on the inverter side and either a 480 V Delta
(Xantrex GT500 480 and Xantrex GT500 480 PG) or 600 V Delta
(Xantrex GT500 600 and Xantrex GT500 600 PG) ungrounded configuration on
the utility side. The utility side can be connected to a grounded WYE or Delta
source. Connect the inverter side as described in Chapter 3.
Conductors, Conduit, and Wiring Methods
All external conduits and conductors must be supplied by the installer. If the
Xantrex GT500 will be installed outdoors, all wiring methods and materials must
be suitable for outdoor use and for connection to a NEMA 3R enclosure. All
conductors must be made of copper and rated for 90 °C (194 °F). Use bushings
or secure routing to keep wiring away from any sharp edges that could damage
wire insulation over time.
Conduit Entry For a typical Xantrex GT500 installation, the recommended cable entry is from
the bottom. See Figure 2-2, “Conduit entry (bottom view)” on page 2–6 for
recommendations on assembly penetration locations and cable routing. Figure
2-2 also shows the maximum allowable areas (shaded) and locations in which
electrical conduits should be located when cable entry is from the bottom. If side
entry is used, the acceptable cable entry locations in the sides of both the
inverter and transformer assemblies are as shown in Figure 2-1 on page 2–5.
To penetrate the assembly from above ground (side entry):
1. Mark all the holes to cut out from the panel.
2. Punch or cut holes. Make sure all holes are free from burrs and sharp edges.
3. Mask and treat any exposed, cut edges with a rust primer.
4. After the rust primer dries, paint these edges with white appliance epoxy
paint, such as Rustoleum™, Krylon™, or equivalent.
5. Insert conduit(s) and attach to the panel with the appropriate,
code-compliant hubs.