4.3 Electronic Bypass
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UPO33
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4.5. Total manual shutdown
4.4. Manual bypass
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Figure 4.3 Operating diagram UPO33 UPS in electronic mode
Figure 4.4 Operating diagram UPO33 UPS in electronic bypass
Figure 4.5 Operating diagram UPO33 UPS in total manual shutdown.
In this state the load is powered from the mains through an electronic switch
(SCR's). This happens when there is some kind of overload, when the
temperature inside the UPS is above the nominal value of operation or
when the battery pack is deeply discharged.
In this state the load is powered from the network through the bypass breaker.
When the UPS is in manual bypass the load is supplied directly from the
network through the bypass breaker while the UPS remains de-energized.
This allows maintenance on the UPS without interrupting power to the load.
In full manual mode off the inverter is off and the load is not powered through
the bypass. However, if the batteries are down-rooted, the battery charger
works. Communications devices and LCD display also operate in this state.