Modifications reserved
Page 57/71
OPM_SGS_USM_M75_M75_2US_V010.doc
User Manual
SG Series 750 UL S2 & SG Series 750 T12 UL S2
2. Close the UPS Output Switch Q1 (Pos. I) on all UPS units.
The
load
is supplied by the utility through the
automatic
bypass
.
The
Synoptic Diagram
must display the status
“
LOAD
SUPPLIED BY AUTOMATIC BYPASS
”
.
Input Circuit Breaker CB4
closes automatically.
LED 3 (rectifier ON)
must blink.
The rectifier starts up automatically, supplying the DC circuit, and charging the DC capacitors.
The
LED 3 (rectifier ON)
stops blinking and stays ON, indicating that the DC link has reached the floating
voltage.
3. Connect the Battery on all UPS units by closing (Pos. I) the Battery Circuit Breaker.
Attention: to check the right DC polarities on both side of the switch/fuse holder!
LED 4b
(Charging Battery)
should be lit indicating
battery charge
.
ATTENTION !
Before performing this operation, the
LED 3 (Rectifier ON)
must remain lit, thus
indicating that the DC-Link has reached floating voltage (540Vdc)!
4. Insert the Inverter by pressing the
“
Inverter ON
”
( I ) key on first UPS unit.
The
Inverter
will start up.
LED 5 (Inverter available)
must be blinking
In a short time, when the
Inverter voltage
is confirmed, the
LED 5 (Inverter available)
will stop blinking and stay
fixed lit.
The
Load
will be automatically transferred from
Utility
to
Inverter
if the
Inverter power
is sufficient to supply
the
Load
.
The
Synoptic Diagram
, on first UPS unit, must display the
status
“
LOAD SUPPLIED BY INVERTER
”
.
5. Insert the Inverter by pressing the
“
Inverter ON
”
( I ) key on all other UPS units
.
Do not start the next
Inverter
until the sequence of the previous ends.
As soon as the output power of the
inverters
is sufficient to supply the
Load
, the output of the units with
running
Inverter
will transfer to
inverter
.
LED Alarm
turn Off and the
LED Operation
must be lit.
The
Synoptic Diagram
, on all UPS units, must display the
status
“
LOAD SUPPLIED BY INVERTER
”
.
6. Load
supply.
SG Series 750
or
SG Series 750 T12 Parallel System
is now running, supplying power to the output.
Insert the
loads
one by one to the output of the UPS.
Check the output current value of
L1
,
L2
and
L3
and check for correct load balance.
7.
Operation mode selection.
SG Series 750
or
SG Series 750 T12
is delivered normally selected for permanent
VFI
operation.
eBoost™ Operation Mode
can be enabled if available, and the
eBoost START
time &
eBoost STOP
time can
be programmed for each day of the week (see
Section 6.4 SETUP / eBoost)
.
END OF PROCEDURE
NOTE !
The
Battery
must be charged for at least 10 hours, in order to ensure the full backup
runtime in case of a
Utility Failure
.