Xantrex Technology XDI2048 - Manual (Page 46)

Inverter Module Installation and Operation
3-4 TM-DIOP-01XN-01
Operation of Inverter Module
Theory of Operation
The XDI is a digitally controlled power converter. It provides galvanic
isolation from the DC input to the AC output. The isolation stage is a
resonant full-bridge converter and the inversion stage is a highly efficient
class D amplifier (patent pending).
Depending on the rack wiring, inverters can operate in stand-alone,
parallel, 3-phase or split-phase mode. Details on rack wiring are in
Chapter 2.
When paralleled there is no master unit and each unit adjusts its own
power level for best power sharing.
The user interface lines and the optional Ethernet provide a convenient
way to remotely control and monitor the status of each Inverter in the
rack.
All user lines (see Figure 2-3) as well as communication lines between the
units (CANbus and synchro lines - see Figure 2-3) are isolated from the
input DC and output AC power potential.
System Startup
Turn the front panel switch (see Figure 3-2) to the ON position to enable
the inverter.
At power-on, the unit enters into a self-diagnostic mode to check that the
inverter is functioning correctly and no alarm conditions exist. During
this short delay (about 10 seconds), the “Standby/ON” Indicator (see
Figure 3-2) will flash green. Once the unit has completed its self-
diagnosis and everything is functioning correctly, by default the inverter
output will turn on. The “Standby/ON” indicator will remain solid green
and he power will be delivered to the output AC terminals (see Figure 2-
3).