
UPS725-02-02 PowerWave 1000 (4.5 - 10 kVA) User Manual UK Dated 13/03/15
7
2: General Description
2.3.2 UPS Module operating modes
Figure 2.2 Summary of UPS module operating modes
EM
I
EM
I
AC/DC (PFC)
CONVERTER
DC/AC
INVERTER
STATIC
SWITCH
BATTERY
CHARGER
BATTERY
DC/DC BOOST
CONVERTER
Utility
Mains
Input
UPS AC
Output
Static Bypass Line
EM
I
EM
I
AC/DC (PFC)
CONVERTER
DC/AC
INVERTER
STATIC
SWITCH
BATTERY
CHARGER
BATTERY
DC/DC BOOST
CONVERTER
Utility
Mains
Input
UPS AC
Output
Static Bypass Line
EM
I
EM
I
AC/DC (PFC)
CONVERTER
DC/AC
INVERTER
STATIC
SWITCH
BATTERY
CHARGER
BATTERY
DC/DC BOOST
CONVERTER
Utility
Mains
Input
UPS AC
Output
Static Bypass Line
EM
I
EM
I
AC/DC (PFC)
CONVERTER
DC/AC
INVERTER
STATIC
SWITCH
BATTERY
CHARGER
BATTERY
DC/DC BOOST
CONVERTER
Utility
Mains
Input
UPS AC
Output
Static Bypass Line
UPS ON-BATTERY Mode
This is the UPS mode of operation if the utility input
fails during normal (ON-LINE) operation:
The battery discharges through the DC/DC boost
converter which provides the DC power for the
inverter input.
The Inverter convert the DC supplied by the DC/DC
boost converter back into AC suitable for
connecting to the load.
The static switch connects the inverter output to the
UPS output (load) terminals.
UPS OFF
This is the state of the UPS when it is turned off
from the operator control panel – it is effectively
running in bypass mode. It also applies if the UPS
locks out due to a fault:
• If the utility supply is still available, the
battery charger will be live and maintain the
battery charging.
• UPS output has raw mains available.
UPS ON-LINE Mode
This is the UPS normal mode of operation:
The battery charger charges the battery.
The AC/DC converter processes the utility mains
input and turns it into controlled DC power for the
inverter input.
The inverter converts the DC supplied by the AC/
DC converter back into AC suitable for connecting
to the load.
The static switch connects the inverter output to
the UPS output (load) terminals.
UPS ON-BYPASS Mode
This is the ‘normal’ mode of operation if the UPS is
used in its ECO mode, otherwise this mode is
usually entered if the UPS has a fault or overload:
The battery is permanently charged as long as the
battery charger is still serviceable and able to
operate. (If the bypass transfer was due to a UPS
fault the battery charger might also have shut
down.)
The static switch connects the UPS output (load)
terminals directly to the raw utility mains via the
static bypass line.
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