Sine wave under main supply, square wave under battery operation
Overload: As load over 130%, UPS is protected in 3seconds. Load input: Fuse for overload and short circuit protection. Short Circuit: UPS cut off immediately.
Type: Sealed lead acid maintenance-free. Protection: Auto-inspection, discharge protection and battery fault caution. Battery: Normally, battery is charge once in three months, it is less than 6hours charging a time.
Battery Mode. Sufficient battery capacity, buzzer rings every 4seconds, red light flash. Insufficient battery capacity, buzzer rings every 1second, red light flashing. Battery Low Voltage or Overload/Short Circuit: Buzzer keeps ringing, red light on.