Modifications reserved
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OPM_SPE_XXX_10K_40K_8GB_V020.doc
Operating Manual
SitePro 10-15-20-30-40 kVA / S8
8.2.4 Separate a UPS unit from the Redundant Parallel System
INITIAL SITUATION:
The
load
is powered by the
UPS Redundant Parallel System
.
One UPS unit of the
Parallel System
has to be turned Off, while the
load
is shared
between the other units supplying the parallel bus.
WARNING!
The control bus cable connecting
J52 (A)
and
J62 (B)
cannot be connected or
disconnected after the system has been powered on.
1. Disconnect the inverter by pressing
“
Inverter OFF
”
( O ) key and hold until the LED Inverter (5)
turns OFF on the Unit to separate
.
With
redundant system
, pressing the key OFF the
inverter
shuts down and it will stay OFF.
If by pressing the key
“O”
the
load
is transferred to the
mains
and the
inverter
remains operating, it means
the system is not redundant.
In this case is not possible to switch-OFF one unit without transferring the
load
on
mains
.
Load
supplied from
inverter(s)
of the other Unit(s) of the
Parallel System
.
2. Open the output switch Q1 on the Unit to separate.
LED Alarm
is lit and the
LED Operation
is Off.
`
Home\Commands
COMMANDS
RESET LOAD OFF
REQUEST LOAD OFF
3. Perform the command “Load Off” on the Unit to
separate.
Perform the command
“Load Off”
by entering the
screen (see
Section 7.5)
:
COMMANDS /
REQUEST LOAD OFF
The output contactor
K6
open.
V
4. Open the input rectifier switch Q4 (Pos. 0) on the Unit to separate.
The rectifier turns OFF.
The
acoustical alarm
is activated, press
“MUTE”
key to reset it.
5. Disconnect the battery removing the battery fuses F8 – F9 on the Unit to separate.
The
acoustical alarm
is activated, press
“MUTE”
key to reset it.
6.
Disconnect the mains, on the Unit to separate, from the input distribution only when the DC-
Link voltage results to be below 20 Vdc (see screen METER / BATTERY / V).
The UPS is now voltage free, except for battery voltage in case the battery is integrated in the UPS cabinet.
All the
LEDs
and the
LCD display
must be OFF.
WARNING!
It will take 5 minutes for the DC capacitors to discharge
Open only the front door, do not open any other part of the UPS.
NOTE !
For any further intervention contact nearest
Service Centre
.