Protections, Troubleshooting And Maintenance; Protection - Epsolar ViewStar Series User Manual

5. Protections, Troubleshooting and Maintenance

5.1 Protection

PV Short Circuit
PV Reverse Polarity
PV Over Voltage
Charging Battery Cut Off
Load Overload
Load Short Circuit
Damaged Temperature Sensor
Controller Overheating
TVS High Voltage Transients
When not in PV charging state, the controller will not be damaged in case of a short-circuiting in the PV
array.
When the polarity of the PV array is reversed, the controller may not be damaged and can continue to
operate normally after the polarity is corrected.
When the PV voltage is higher 60V, the controller will cut off the charging automatically, and when the
voltage is lower than 55V, the controller will recover charging. automatically
Disconnect the battery when the controller is charged at rated power , the controller do not be damaged
When the load is overloading (The overload current is ≥ 1.05 times the rated load current), the controller
will automatically cut off the output. If the load reconnects automatically, it needs to be cleared by
pressing the Load button restarting the controller.
Fully protected against load wiring short-circuit（≥2 times rated discharge current）. After five automatic
load reconnect attempt, the fault must be cleared by restarting the controller or pressing the switch
button.
If the temperature sensor short-circuited or damaged, the controller will be charging or discharging at the
default temperature 25℃ to prevent the battery damaged from overcharging or over discharged.
The controller is able to detect the temperature inside the battery. The controller stops working when its
temperature exceeds 85 ° C and restart to work when its temperature is below 75 ° C.
The internal circuitry of the controller is designed with Transient Voltage Suppressors (TVS) which can
only protect against high-voltage surge pulses with less energy. If the controller is to be used in an area
with frequent lightning strikes, it is recommended to install an external surge arrester.
20