Xantrex Technology XDI2048 - Manual (Page 49)

Protections and Alarms
TM-DIOP-01XN-01 3-7
Protections and Alarms
Overview
The Digital Signal Processor (DSP) in the inverter continuously monitors
a number of parameters for purposes of protecting the power source, load,
inverter and user from hazardous conditions. Fuses on the DC input and
AC output provide additional hardware fault protection. An alarm is
triggered whenever a fault is detected. The protective action in the case of
a fault is to turn the inverter off. The inverter then enters a self-diagnosis
loop until the fault causing the alarm clears. This also clears the alarm in
the fault register and allows the inverter to resume normal operation. If an
alarm is tripped the fault flag on the user port as well as the red front panel
indicator will be active.When equipped with the Ethernet option, the
actual fault condition causing the alarm can be queried.
Input Voltage Protection
The inverter will continuously operate from an input source in the range
of -35 to -75 Vdc. Should the input voltage fall outside this range for
more than 4 seconds, the inverter output is disabled and internal relays
open to isolate the load and source. In this condition, the red LED on the
front panel is lit and fault flag on the user port is set high. The inverter
resumes normal operation as soon as the input is within acceptable limits
for 2 seconds.
Output Voltage Protection
The output is monitored for conditions potentially damaging to the
inverter or load. A voltage exceeding 140 Vac (263 Vac for the 230 V
model) at the inverter output for over 1 second, or a voltage below 80 V
(154 Vac for the 230 V model) for more than 5 seconds will cause the
inverter to shut down and open the internal load relay. This fault condition
is reported by setting the fault flag on the user port and fault LED on the
front panel. The DSP continues to check for compatible output conditions
before enabling the inverter and switching to “on-line” status.