34007724EN/AD - Page 19
8
10
11
8
11
10
8
10
11
Frequency converter
(without Bypass AC input)
Main
low-voltage
switchboard
(MLVS)
Main
low-voltage
switchboard
(MLVS)
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
Hot stand by
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)
8
10
11
8
10
11
8
10
11
MLVS 1
MLVS 2
load
load
load
MLVS 1
MLVS 2
or
MLVS 1
MLVS 2
load
load
Bypass AC
Normal AC
Bypass AC
Normal AC
Bypass AC
Bypass AC
Normal AC
Normal AC
Normal AC
Normal AC
