Parallel redundant & power system UPS 60…800kVA FXS – Operating manual
Sistema parallelo ridondante e di potenza UPS 60…800kVA FXS – Manuale operativo
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JUD413937
Rev.A JSE414215 07/06/11
12. START-UP
12.1 START-UP FROM MANUAL BY-PASS
The procedure is the following:
o
Close the manual by-pass breaker MBCB in ALL the UPS
o
Move the by-pass switches in BY-PASS position in ALL the UPS
o
Close RCB in ALL the UPS
o
Follow the instructions on the display on the UPS having the lower position
(
Number
1) until it shows the message “OPEN ALL MBCB”. Do not open the
MBCB breakers at this point.
o
Proceed as indicated above for all the units up to the one having the higher
position (
Number “N”
)
o
Verify that all the by-pass static switches are closed
o
Open the manual by-pass breaker MBCB in ALL the UPS
o
Upon the display request, move the by-pass switches of all the units in
position NORMAL, starting from the UPS
Number 1
.
12.2 MANUAL BY-PASS TRANSFER PROCEDURE
On the power parallel system, where all the inverters are necessary to supplied the
load, when one inverter is removed by Bypass Switch, the load is transferred on bypass
(emergency line).
Move ALL by-pass switches in position BY-PASS, so that the load is transferred to
the emergency line on all the UPS systems (LED 6 on the front panel lit orange).
Close one or more MBCB (all the inverter will stop with the alarm A13).
Starting from the UPS having the higher position (
Number “N”
), open the breakers
OCB, SBCB, BCB, RCB.
