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34007724EN/AA - Page 19
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Frequency converter (without Bypass AC input)
Main low-
voltage
switchboard
(MLVS)
load
Normal AC
2. Installation
UPS with separate Normal and Bypass AC inputs, supplied by separate sources
Change in SEA between upstream and downstream or galvanic isolation required
MLVS 1
MLVS 2
load
MLVS 1
MLVS 2
or
MLVS 1
MLVS 2
load
load
Bypass AC
Normal AC
Bypass AC
Normal AC
Bypass AC
Normal AC
Hot stand by
Bypass AC
Normal AC
Normal AC
Main low-
voltage
switchboard
(MLVS)
load
Configuration used when the frequency of the application differs from the Mains (Example: marine requirements).
Configuration used to provide full redundancy (N+1) to critical loads.
(*)
(see page 18)
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