MD-1000I / MD-2000I / MD-3000I System Function
Abnormal UPS operation is as shown below:
Fig. 5-2 - 2 During abnormal power supply
If the power supply is abnormal, the UPS battery automatically transmits power
to the inverter, shuts off the charger and the AC-DC power converter (rectifier).
The inverter converts the DC to AC, in order to supply the connected equip-
ment with uninterrupted energy.
As soon as the power coming from the supply returns to normal, the UPS
opens the AC-DC power converter (rectifier), shuts off the DC-DC converter
and turns the charger on.
During a power outage, the UPS operates as shown in ( Fig. 5-2 - 1 During
normal power supply). When battery level becomes too low, the audible alarm
signal begins and continues until the battery shuts down. The UPS automati-
cally stops battery-supplied power when battery capacity reaches a certain limit
in order to prevent complete discharging. The UPS starts automatically when
the mains is again available.
MD Series 55
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