UPS MKD700/1000 Manual
5 System description
The UPS is built following the principle of double conversion. The UPS
supplies an uninterrupted, single-phase voltage to users with mission-critical
applications. In addition to supplying consumer loads, the equipment also
keeps its internal batteries in a fully charged state. In the event of a power
failure or power fault (e.g. voltage fluctuation), the UPS continues, without
interruption, to deliver a clean voltage supply to the UPS output. In support
mode, the energy is drawn from the battery pack.
Fig. 1:
block diagram
MKD series
The block circuit diagram shows the individual modules of the equipment and
provides a general impression of how they interact.
If the mains power failure exceeds the autonomy time of the UPS, it shuts
down to prevent deep discharging of the batteries. When the mains power
supply is restored, the UPS restarts automatically, supplies the consumer
loads and controls the charging of the battery pack.
Outstanding performance characteristics of the MHD Online UPS are:
o No interruptions or signal changes in case of primary mains failure.
o Perfect sinus voltage on the output of the UPS. The quality of the
output voltage is much better than the mains voltage of the in-house
network.
o Processor controlled bypassing mode (bypass);
o Power Factor correction on the input (>0,95);
o High efficiency degree of the inverter >90% DC / AC;
o High-performance communications interface (RS232 interface);
o LCD displays status and operation mode
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