Specifications

Utility Side Isolation Transformer Requirements
975-0581-01-01 2–5
This manual is for use by qualified personnel only
Utility Side Isolation Transformer Requirements
The Xantrex inverter must be used with a custom, high-efficiency, line-frequency
isolation transformer between the inverter and the grid. This transformer is not
provided and must be supplied as a separate component. The utility side
winding of the isolation transformer may be configured Wye or Delta and must
match the voltage at the utility interconnection point. If the utility side winding of
the transformer is configured Wye; the neutral connection of the transformer may
be connected to the neutral connection on the utility interconnect. Connection of
this utility-side neutral does not affect the operation of the inverter. The inverter-
side winding of the isolation transformer may also be configured Wye or Delta. If
the inverter-side winding of the transformer is configured Wye and the
transformer is equipped with a neutral at the inverter side, the neutral must not be
terminated to the inverter or damage will occur.
Electrical Diagrams
Since installations vary widely, a sample electrical diagram of the Xantrex
GT500 E & GT630 E is provided in Figure 2-3. This diagram is to be used for
system planning purposes only.
For more detailed information, refer to the illustrations inside the door of the
enclosure for electrical schematics.
CAUTION: Equipment Damage
Do not connect any point on the inverter-side winding of the isolation transformer
to ground. Irreparable damage to the inverter will occur.
Figure 2-3 Xantrex inverter Electrical Diagram
IGBT matrix
DC-link
DC
INPUT
lightning
protection
lightning
protection
line
contactor
grid
Sinus Filter
EMC
Filter
EMC
Filter
L2
L1
230/315/375/400V
auxillary control power
L1
L3
DC
switch
L2
AC
switch
line
choke
inverter
choke
line frequency
transformer
UPS Input
230 V, 50 Hz