Borri B8031 - UPS Start-Up Sequence Steps; Detailed Start-Up Sequence and Operations

Start-up, shut-down & manual bypass
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JUD408313 Rev. A JSE410256 17/01/2008
1. INTRODUCTION
Before carrying out whatever procedure described in this chapter, read carefully the
instructions, in order to avoid possible damages to persons or thing due to wrong
manoeuvre.
2. START-UP PROCEDURE
WARNING
Before switching on the UPS, make sure:
1) the emergency power off “EPO” push-button, if provided, is in the release position;
if not, press it and proceed with the start-up procedure;
2) the input and output phase rotation is correct.
NOTE
The breaker BCB is installed inside the UPS’s up to 20 kVA. Batteries and the relevant
breaker for UPS systems having higher power are external.
WARNING
Do not close the battery breaker BCB before it’s required by the front panel. Serious
damages to UPS internal parts may occur if the breaker is closed before the rectifier is
started-up.
Nr. LCD DISPLAYING ACTION UPS OPERATION
1 BLANK
Close RCB
2 UPS START UP
WAIT PLEASE
The rectifier is supplied and the DC voltage
increases up to the nominal value. All LED’s
in the front panel are lit green.
The microprocessor checks all the start-up
conditions are ok.
3 BOOSTER START UP
WAIT PLEASE
The rectifier IGBT bridge starts to modulate
and the inverter intput voltage reaches the
nominal value. After a while LED #3 is lit
green.
4 INVERTER START UP
WAIT PLEASE
The inverter IGBT bridge starts to modulate
and the inverter output voltage reaches the
nominal value. After a while the inverter
static switch thyristors close. LED #5 is lit
green.
5 BYPASS START UP
CLOSE SBCB
Close SBCB
6 BYPASS START UP
WAIT PLEASE
The microprocessor checks that all the by-
pass parameters (voltage, phase sequence,
frequency) are within the tolerance limits.
LED #2 is lit green.