Modifications reserved
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OPM_LPS_33E_60K_M12_2GB_V010.doc
Operating Manual
LP 33 Series 60-80-100-120 kVA / S2
8.2.5 Reconnect a UPS unit to a Parallel System
WARNING !
Before connecting hazardous voltages, make sure that:
•
The connection to the electrical system has been performed by qualified personnel;
•
The
equipment frame
has been correctly grounded to the
main earth
;
•
Make sure that
mains input
protection is removed;
•
All the
panels
removed to allow the UPS connection have been correctly reinstalled;
•
The UPS switches
Q1
and
Q2
are open (Pos. 0);
•
The external
battery
fuses are removed.
This procedure must be performed when the
load
is supplied by the other units of the
UPS Parallel
System
and an additional unit must be switched ON and connected to the parallel bus in order to share
the load with each other.
This unit must be completely switched OFF and not powered.
1. Switch-ON the mains voltage from the input distribution (both rectifier and bypass if separated)
on this UPS unit.
Overall test results
Test1 OK
Test7 OK
Test2 OK
Test8 OK
Test3 OK
Test9 OK
Test4 OK
Test10 OK
Test5 OK
Test11 OK
Test6 OK
The UPS performs a
SELFTEST
.
A successful termination of the tests will be indicated with Overall
test results
“OK”
.
Commissioning cannot be continued should one or more tests result
to be negative.
Please contact in this case your
Service Centre
.
2. Insert the external battery fuses on this unit
.
In case of GE battery cabinet: insert the fuses in their place and close fully the cover of fuse-holder by
using correctly the handle.
3. Close output switch Q1 (Pos. I) on this UPS unit.
`
Home\Meter
BOOSTER
f :
50.0
Hz
L1 :
397
V
L2 :
395
V
L3 :
393
V
Vp :
400
V
Vn :
400
V
Verify on this UPS unit, selecting the screen
METERING/BOOSTER/
Vp
and
Vn
, that the booster voltage has reached about
400 Vdc
.
4. Insert the inverter by pressing
“
Inverter ON
”
( I ) key on this UPS unit.
When the
inverter
will be synchronised, the unit will be
automatically connected with the
parallel bus-bar
and the
load
will
be shared with the other units.
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
”
.
END OF PROCEDURE