During a blackout, the UPS will work as illustrated in figure 4.2. When Battery is
low, buzzer will beep continuously till battery is completely cut off. The battery low
protection of the UPS will cut off battery supply before battery drains to avoid from
battery over-drain. The Inverter LED and Bat. Low LED will light up till the UPS is
completely cut off. The UPS will re-start automatically when Utility is back to
Normal. The working principle is the same as figure 4.1.
4.3. Overload Condition
The working principle of the UPS when overloading is illustrated as follows,
Normally, an inrush current is generated when switching on the connected device.
If the UPS is in 105~120% loading, it will switch to bypass mode in 60 seconds. If
The UPS is in 120%-150% loading, it will switch to bypass mode in 10 seconds. If
The UPS is over 150% loading, it will switch to bypass mode immediately. The
Utility LED, Bypass LED and Over Load LED light up. If overload condition is
eliminated by reducing the load to 80%~90%, the UPS will switch back to Inverter
mode automatically.
O/P
OUTPUT
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