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Les langues disponibles
(Q5)
(Q1a)
Fig. 25. SLC CUBE3+ PS UPS single line diagram with operating
flows.
(Q5)
(Q4a)
(Q1a)
Fig. 26. SLC CUBE3+ PS B UPS single line diagram with oper-
ating flows.
4.3.5. Static bypass stage.
When the inverter can't keep the voltage to the critical loads due
to overloads, short-circuits, current limits or faults, the UPS from
SLC CUBE3+ PS series has a bypass circuit, which supplies iso-
lation for the inverter and supplies the critical loads directly from
electrical mains.
The UPS controls the availability inverter-bypass permanently in
order to make the shifting between them.
The bypass stage is based on six double thyristors in semipack
format, working as AC switches, three of them are for shifting the
input over the output and the other three are for shifting the in-
verter over the output.
The managing system of the SCR switches is based on drivers
designed with a shifting system that responds to the following
requirements:
Full static shifting system.
•
Shifting with no high transient currents.
•
Shifting with no transfer time.
•
The control algorithm of the triggering signals of the thyristors
assures a nil transfer time, and avoids short-circuits between the
thyristors of bypass and inverter (shifting with zero cross current).
USER'S MANUAL
Maintenance line (manual Bypass).
Emergency line (static Bypass).
(Q3)
Maintenance line (manual Bypass).
Maintenance line (manual Bypass).
(Q3)
Normal operating.
Mains fault.
Operating with inverter non-active (EPO condition to «Off»).
Operating over manual bypass.
Normal operating with Peak
Normal operating.
Mains fault.
Operating with inverter active (EPO condition to «On»).
Operating over manual bypass.
Normal operating with Peak
4.3.6. Maintenance or manual Bypass.
UPSs from SLC CUBE3+ PS series are foreseen with an auxiliary
line protected by a circuit breaker switch, which makes an elec-
trical bridge between the input and output terminals.
Managing this switch,properly together with the input and output ,
allows isolating electrically all the UPS elements from the electrical
lines.
The type of manoeuvring of the maintenance bypass is "make be-
fore break", with the purpose of keeping the critical loads fed, even
during the maintenance tasks.
4.3.7. Terminals for EPO.
The UPS has two terminals to install an external button of emer-
gency output shutdown (EPO).
4.3.8. Control panel.
The UPS from SLC CUBE3+ PS series has a sophisticated control
panel managed by a microntroller, which acts as a interface mode
between the UPS and the end-user.
Depending on the model, it is equipped with an alphanumerical
panel or touchscreen. Automatically, both devices informs to the
(Q2)
Shaving.
(Q2)
Shaving.
SLC CUBE3+ PS UNINTERRUMPTIBLE POWER SOURCE
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