18
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Battery mode (Stored Energy Mode)
If the AC mains input power fails, the inverter, which obtains power from the battery,
supplies the critical AC load. There is no power interruption to the critical load. The
UPS will automatically return to Normal Mode when AC recovers.
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Bypass mode
If the inverter is out of order, or if overload occurs, the static transfer switch will be
activated to transfer the load from the inverter supply to bypass supply without inter-
ruption to the critical load. If the inverter output is not synchronized with the bypass
AC source, the static switch will perform a transfer of the load from the inverter to the
bypass with power interruption to the critical AC load. This is to avoid paralleling of
unsynchronized AC sources. This interruption is programmable but typically set to be
less than an electrical cycle e.g. less than 15ms (50Hz) or less than 13.33ms (60Hz).
Maintenance bypass switch
bypass input
Mians input
Battery input
Output
Maintenance bypass switch
bypass input
Mians input
Battery input
Output
Static Bypass
Static Bypass
Summary of Contents for STARK 10 kVA
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