Modifications reserved
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OPM_SPE_XXX_10K_40K_8GB_V020.doc
Operating Manual
SitePro 10-15-20-30-40 kVA / S8
8.2.6 Complete Parallel System shutdown
NOTE !
Follow this procedure only in case the
UPS Parallel System
and the
load
must be
completely powered-down.
Initial situation:
The
load
is powered by
SitePro Parallel System
supplying the parallel bus.
With the
UPS Parallel System
in normal operation and the
inverters
supplying the
load
, the
switches Q1
and
Q4
are closed (Pos. I)
,
Q2
are open (Pos. 0)
, and the
battery fuses
F8 – F9
are inserted.
The
synoptic diagram
, on all UPS units, must display the status
“
load supplied by inverter
”
.
1. Disconnect the inverter by pressing
“
Inverter OFF
”
( O ) key and hold until the LED Inverter (5)
turns OFF on all UPS units.
At no redundancy, the system will transfer to
mains
supply.
LEDs Alarms
are lit and the
LEDs Operation
are Off.
The
synoptic diagram
, on all UPS units, must display the status
“
LOAD SUPPLIED BY AUTOMATIC BYPASS
”
.
2
Press “Load Off” key on anyone of the parallel units.
The output contactor
K6
on each unit open, and the
UPS Parallel System
output will be powered down.
3. Open the input rectifier switch Q4 (Pos. 0) on all UPS units.
LED Alarm
blinks and the
acoustical alarm
is activated, press
“MUTE”
key to reset it.
LED Alarm
remains lit.
4. Open the output switch Q1 (Pos. 0) on all UPS units.
5. Disconnect the battery removing the battery fuses F8 – F9 on all UPS units.
The electronic boards and the control panel are still powered from AC power supply through the plug
X8
on
the
”P1 - Power Interface”
(Warning! This board will remain powered from the mains throughout this
procedure!).
The
acoustical alarm
is activated, press
“MUTE”
key to reset it.
6. Disconnect the mains, on all UPS units, from the input distribution only when the DC-Link
voltage results to be below 20 Vdc (see screen METER / BATTERY / V).
The
UPS Parallel System
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
on the panels must be OFF.
NOTE !
Follow this procedure only in case the UPS system and the load must be completely
powered-down.