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OPM_LPS_33E_60K_M12_2GB_V010.doc
Operating Manual
LP 33 Series 60-80-100-120 kVA / S2
8.1.2 UPS shutdown with load transfer on manual bypass Q2
The purpose of this procedure is to supply the
load
directly by
mains
through
manual bypass Q2
.
This procedure is normally performed when the UPS must be completely switched OFF for maintenance
or service purpose, performed by an authorised
Service Centre
.
NOTE !
This procedure must not be performed if the UPS is used as
frequency converter
.
1. Disconnect the inverter by pressing
“
Inverter OFF
”
( O ) key and hold until the LED Inverter (7)
turns OFF.
Load
is transferred to
mains
by
automatic bypass
.
LED Alarm
is lit and the
LED Operation
is Off.
The
synoptic diagram
must display the status
“
LOAD SUPPLIED BY
AUTOMATIC BYPASS
”
.
2. Close the manual bypass switch Q2 (Pos. I).
Load
is now supplied parallel through
automatic bypass
and
manual bypass Q2
.
The
synoptic diagram
must display the status
“
LOAD SUPPLIED BY
AUTOMATIC BYPASS AND MANUAL BYPASS Q2
”
.
3. Open the output switch Q1 (Pos. 0).
The
load
is now supplied only through the
manual bypass Q2
.
The
synoptic diagram
must display the status
“
LOAD SUPPLIED BY
MANUAL BYPASS Q2
”
.
4. Press “Total Off” key.
5. Remove the external battery fuses.
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.
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