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6739381EN/
Diagram for a frequency converter with batteries
Fig. 12
Diagram for a frequency converter without batteries
Fig. 11
Note:
Both the rectifier-inverter cubicles and
the Static Switch Cubicle can be
supplied from a common mains, in
which case there is only one upstream
circuit breaker (same as the case of a
single-unit UPS with a common Mains
1 and 2).
Example of a 2 parallel UPS rectifier-inverters with SSC
mains 1
inverter
rectifier
charger
load
battery cubicle
beside the
rectifier-inverter cubicle
earth
+
-
+
-
other battery
cubicles (if
applicable)
frames interconnections for earthing
earth
QF1
Q1 Q5N
rectifier-inverter cubicle
earth
mains 1
inverter
rectifier
charger
load
Q1 Q5N
rectifier-inverter cubicle
earth
load
Q5N
Static Switch Cubicle
static
switch
mains 2
earth
Q3BP
Q4S
mains 1
inverter 1
rectifier
charger
inverter 1
output
Q1 Q5N
rectifier-inverter cubicle 1
earth
battery cubicle
beside rectifier-
inverter cubicle 1
earth
+
-
+
-
other battery
cubicles (if
applicable)
frames interconnections for earthing
earth
QF1
mains 1
inverter 2
rectifier
charger
inverter 2
output
Q1 Q5N
rectifier-inverter cubicle 2
earth
battery cubicle
beside rectifier-
inverter cubicle 2
earth
+
-
+
-
other battery
cubicles (if
applicable)
frames interconnections for earting
earth
QF1
frames interconnection for earthing
frames interconnections for earthing
Fig. 13
Installation (cont.)