SUNFLX SEI-8K-SP - Protection and Maintenance; Inverter Protection Features

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8. Protection and Maintenance
8.1、Protection features
No
Protection Feature
Instruction
1
PV input current/power
limiting protection
When the charging current or power of the PV array configured
exceeds the PV input rated value, the inverter will limit the input
power and charge at the rated.
2
PV input over-voltage
If the PV voltage exceeds the maximum value allowed by the
hardware, the machine will report a fault and stop the PV boost to
output a sinusoidal AC wave.
3
PV night reverse current
protection
At night, the battery is prevented from discharging through the PV
module because the battery voltage is greater than the voltage of
PV module.
4
AC input over-voltage
protection
When the AC input voltage of each phase exceeds 280V, the mains
charging will be stopped and switched to the inverter mode.
5
AC input under-voltage
protection
When the AC input voltage of each phase below 170V, the utility
charging will be stopped and switched to the inverter mode.
6
Battery over-voltage
protection
When the battery voltage reaches the over-voltage cut-off point,
the PV and the utility will automatically stop charging to prevent
the battery from being overcharged and damaged.
7
Battery under-voltage
protection
When the battery voltage reaches the under-voltage cut-off point,
the inverter will automatically stop the battery discharge to prevent
damage from over-discharging the battery.
8
Battery over-current
protection
After a period when the battery current exceeds that allowed by the
hardware, the machine will switch off the output and stop
discharging the battery.
9
AC output short-circuit
protection
When a short-circuit fault occurs at the load output terminal, the
AC output is immediately turned off and turned on after 1 second.If
the output load terminal is still short-circuited after 3 attempts, the
inverter must be manually restarted after first removing the short-
circuit fault from the load before the normal output can be
restored.
10
Heat sink over-
temperature protection
When the internal temperature of the inverter is too high, the
inverter will stop charging and discharging; when the temperature
returns to normal, the inverter will resume charging and
discharging.
11
Inverter over-load
protection
After triggering the overload protection the inverter will resume
output after 3 minutes, 5 consecutive overloads will switch off the
output until the inverter is restarted.
(102%<load<110%) : alarm and output shutdown after 5min; (110%
< load < 125%) : alarm and output shutdown after 10s.