Srne ASF4880SH3 - Protection and Maintenance; Protection function

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File version: V1.0
8. Protection and Maintenance
8.1 Protection function
No
Protection functions
Description
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 reports a fault and stops PV boosting to
output a sinusoidal AC waveform.
3
Anti-reverse charge
protection at night
At night, the battery will be prevented from discharging to the PV
module because the battery voltage is greater than the PV module
voltage.
4
AC input over-voltage
protection
When the mains voltage of per phase exceeds 280Vac, the mains
charging will be stopped and will switch to inverter output.
5
AC input under-voltage
protection
When the mains voltage of per phase falls below 170Vac, the
mains charging will be stopped and will switch to inverter output.
6
Battery over-voltage
protection
When the battery voltage reaches the over-voltage disconnection
voltage point, it will automatically stop the PV and mains charging
of the battery to prevent over-charging and damage to the battery.
7
Battery under-voltage
protection
When the battery voltage reaches the low-voltage disconnection
voltage point, it will automatically stop discharging the battery to
prevent the battery from being over-discharged and damaged.
8
Battery over-current
protection
When the battery current exceeds the range allowed by hardware,
the machine will turn off output and stop discharging the battery.
9
AC output short-circuit
protection
When a short-circuit fault occurs at the load, the AC output voltage
will be switched off immediately and output again after 1 min. If the
output load is still short-circuited after 3 attempts, short-circuit fault
of the load must be eliminated first and then manually re-powered
in order to restore the normal output.
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 restarts.
(102%<load<110%) ±10%: error, output switched off after 5
minutes.
(110%<load<125%) ±10%: error reported and output switched off
after 10s.
(>125% load ±10%): error reported and output switched off after
5s.