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OPM_SGS_USM_10K_40K_0US_V010.doc
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Operating
Manual
SG Series
10, 20, 30 & 40 kVA
7.2 PROCEDURES FOR UPS FUNCTIONING AS FREQUENCY CONVERTER
When the
SG Series
functions as a
Frequency Converter
, the
Automatic Bypass
and
Manual Bypass
functions are disabled.
Therefore the
Load
cannot be transferred to
Utility
in case of overload, short circuit,
or
Inverter
failure.
In situations where the UPS needs to be shutdown for maintenance purposes, also
the
Load
must be shutdown or disconnected
7.2.1 Start-up
of
the
SG Series
as frequency converter
Verify with open front door: Switch
Q1
must be open
(Pos. O).
1. Connect the Utility power on the UPS.
•
Power supply starts up.
Indicated with flashing
alarm
and
buzzer sound
.
•
LED’s as indicated will be lit.
•
Press
mute
, to reset
alarm and buzzer
.
2. Close Q1 (Pos. I)
.
•
Rectifier
starts automatically, blinking
LED
indicates Soft-start.
•
At the end of
Rectifier
Soft-start,
LED
remains lit.
3. Connect the Battery to the UPS by closing the Battery Switch or Fuses, in
case of External Battery
.
4. Press
“
inverter on
”
( I ) key
.
•
Soft-start of
Inverter
indicated with blinking
LED
.
•
At the end of Soft-start the
LED
remains lit.
•
UPS output
LED
indicates
Load on Inverter
.
The
LCD
must display on the main screen the status
“
LOAD ON INVERTER
”
.
End of procedure
The
Battery
must be charged for at least 10 hours, in order to ensure the full
backup runtime in the case of a
Utility Failure
.
