UPS: MKD 700
– 3000 VA RT (XL)
UPS Device Description
Standard operation mode (INVERTER MODE)
The standard operation mode is characterized here by a classic double
conversion. The supply network is converted to the DC intermediate circuit
which then feeds the UPS output through an inverter (DC/AC converter). The
by-pass is inactive here.
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Fig. 3-2 Operating mode: standard operation.
Support or autonomous mode (BATTERY MODE)
In the event the supply network temporarily fails, the inverter draws power
directly from the battery bank and thereby supplies the UPS output without
interruption. The autonomous mode is limited by the capacity of the battery bank
and its charging status.
Fig. 3-3 Operating mode: autonomous mode.
Static by-pass operation mode (FAULT MODE)
Often in the case of a device fault (fault mode) with the inverter, the UPS
automatically and without interruption of the UPS output switches to the static
by-pass operation mode. In doing so, the load feed is securely maintained over
the power supply, albeit without the support function of the UPS. Once the fault