MD-1000I / MD-2000I / MD-3000I System Function
5.3 Overload
UPS operation when overloaded is as shown below:
Fig. 5-3 - 1 Overloaded situation
Generally, modern electronics and IT equipment produce inrush current when
they start. The magnitude of the inrush current varies depending on the equip-
ment. Sometimes the current can be 6 times as high as measured capacity,
while other devices generate inrush that is insignificant.
The UPS has an overload protection that protects it from inrush current. If the
overload exceeds 105~120% of its capacity, it automatically switches to bypass
within 30 seconds, in order to protect the inverter. As soon as the overload
drops below <105%, the UPS returns to the inverter mode. If the UPS load ex-
ceeds 150%, the inverter automatically shuts down.
MD Series 56
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