Operating Modes; Mode "On Line" (Inverter Mode); Mode"Off-Line"(Eco- Or Bypass Mode) - ABB PowerWave 33 Series 3 User Manual

6.4 Operating modes

6.4.1 Mode "ON LINE" (INVERTER MODE)

The ON-LINE-Mode is the UPS-Operating Mode in which the load is supplied through the RECTIFIER
and INVERTER.
Using the control panel the UPS can easily be transferred to the ON-LINE-Mode. The ON-LINE-Mode
provides the highest degree of protection, especially in the event of a mains disturbance or failure. This
operating mode is always recommended if the critical loads (computer systems) will not tolerate any
interruption of the supply (not even the shortest). In the unlikely event of an inverter fault or overload
condition the UPS will transfer the load automatically and without interruption to the static bypass-mains
supply (transfer time = 0).

6.4.2 Mode"OFF-LINE"(ECO- or BYPASS MODE)

In the "OFF-Line Mode", the load is supplied from the mains through the static bypass. Using the control
panel the UPS may be easily transferred to "Bypass Mode".
When the UPS is operating in "Bypass Mode", the efficiency of the system is higher. In the event of a
mains failure the load will automatically be transferred from mains to inverter within 5 msec (this is valid
for single and parallel systems). The battery charger remains active in the "Bypass-Mode".
The "Bypass-Mode", is recommended only if the loads can tolerate interruptions of 3-5 ms (transfer
time from Bypass Mode to ON-LINE Mode).
TO HAVE THE MOST ESSENTIAL SECURITY LEVEL, WE RECOMMEND TO
RUN THE UPS ON NORMAL OPERATION MODE, MEANS ON-LINE MODE.
NOTE
Modifications reserved
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LED Indicator Color
LINE 1 Green
LINE 2 Green
BYPASS OFF
INVERTER Green
BATTERY Green
LED Indicator Color
LINE 1 Green
LINE 2 Green
BYPASS Green
INVERTER OFF
BATTERY Green