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
8.2.6 Complete Parallel System shutdown
As a result of this procedure the
Parallel System
is completely switched OFF and not powered.
NOTE !
Follow this procedure only in case the
Parallel System
and the load must be
completely powered-down.
1. Press
“Total Off” key on anyone of the parallel units.
2.
Open the output switch Q1 (Pos. 0) on all UPS units
.
3. Remove the external battery fuses on each unit
.
In case of GE battery cabinet:
−
Open fully and remove the cover of fuse-holder by using correctly the handle;
−
Remove the fuses from their place, re-install and close fully the cover of fuse-holder.
The
acoustical alarm
is activated, press
“MUTE”
key to reset it.
4
.
In order to discharge the DC link capacitors, insert the inverter by pressing
“
Inverter ON
”
( I ) key
on all UPS units.
`
Home\Meter
INVERTER
f :
50.0
Hz
L1 :
7
V
L2 :
7
V
L3 :
7
V
T :
OK
SYNCHRONISED
Remark
:
Command
INVERTER ON
will be enabled only when the inverter
voltage of each phase decreases below
7 Vac
(about 30 seconds).
`
Home\Meter
BOOSTER
f :
50.0
Hz
L1 :
397
V
L2 :
395
V
L3 :
393
V
Vp :
5
V
Vn :
5
V
Before proceeding to step
5
, check on the display panel that the
DC
link voltage
(both polarities)
Vp
and
Vn
has reached the max.
voltage of
5 Vdc
(about 30 seconds).
The
acoustical alarm
is activated, press
“MUTE”
key (from Home
screen) to reset it.
5. Disconnect the inverter, on all UPS units, by pressing
“
Inverter OFF
”
( O ) key and hold until the
LED Inverter (7) turns OFF.
6.
Switch OFF the mains power, on all UPS units, at the AC input distribution panel.
END OF PROCEDURE
WARNING !
If the above procedure is not completely performed, it could cause
serious damages to the UPS.
In case the procedure described on step
“4 - Discharge DC link capacitors”
cannot
be completely performed, the DC capacitors could be charged with dangerous
voltage for a min.5 minutes.
Wait until capacitors are completely discharged before starting the UPS again.
Apart from the front door, do not open any other part of the UPS.