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13
system start-up
single-UPS unit or redundant
parallel UPS
See figure 15.
Proceed in the following order:
■ close the upstream switches supplying
normal and bypass AC source power (on
the LV switchboard);
■ close normal AC input switch Q1. The
system powers up:
❏ the rectifier/charger automatically starts,
❏ green light 1 on the control panel goes
on,
❏ light 2 turns red;
■ close bypass AC input switch Q4S:
❏ green lights 3 and 5 on the control
panel go on;
■ close inverter output switch Q5N;
■ close battery circuit breaker QF1;
❏ light 2 goes off;
■ open maintenance bypass switch
Q3BP;
■ press the "inverter on" button 7 on the
control panel:
❏ the green "inverter" light 4 flashes,
❏ the inverter starts, then, if the bypass AC
source transfer conditions are satisfied,
the load is transferred to the inverter if the
on-line mode is selected.
❏ the green "static-bypass" light 3 goes
off,
❏ the green "inverter" light 4 shines for
on-line mode.
parallel UPS unit for
increased output
See figure 16.
Proceed in the following order:
■ check that all load devices are off or
that the load is disconnected;
■ close the upstream switch supplying
normal AC source power (on the LV
switchboard);
■ close the normal AC input circuit break-
ers Q1 on the UPS units. The system
powers up:
❏ the rectifier/chargers automatically start,
❏ the green "rectifier/charger" lights 1 in
the control panels go on,
❏ lights 2 turn red;
■ close the battery circuit breakers QF1;
❏ lights 2 go off;
❏ green lights 3 and 5 on the control
panels go on;
■ close output switches Q5N for the
inverters and in the external bypass unit;
■ open maintenance bypass switch Q3BP
in the external bypass unit;
■ press the "inverter on" button 7 on
each control panel:
❏ the green "inverter" lights 4 flash;
■ when a sufficient number of inverters
are ready, the inverter-output contactors
close:
❏ the green "inverter" lights 4 shine per-
manently green;
❏ the "static-bypass" lights 3 go off.
start-up of a module
start-up of a rectifier/charger
■ rectifier/charger start-up is automatic
when the normal AC input circuit breaker
Q1 is closed:
❏ the green "rectifier/charger" light 1 on
the control panel goes on;
■ close battery circuit breaker QF1.
start-up of an inverter
When the rectifier/charger is on:
■ press the "inverter ON" button 7 on the
control panel;
❏ the green "inverter" light 4 flashes.
Single-UPS unit
■ the inverter starts, then, if the bypass
AC source transfer conditions are satis-
fied, the load is transferred to the inverter
if the on-line mode is selected. For on-
line mode:
❏ the green "inverter" light 4 remains on,
❏ the "static-bypass" light 3 goes off.
Parallel UPS unit
■ the inverter starts and awaits the start of
the other inverters;
■ when they are all on or enough have
been started to supply the rated load
power, the output switch for each running
inverter closes and the load is supplied
with power:
❏ the green "static-bypass" light 3 goes
off,
❏ the green "inverter" light 4 on the con-
trol panels of the running inverters goes
on.
WARNING
Rectifier/charger start-up
is automatic when normal
AC input circuit breaker
Q1 is closed. DC voltage
is present in the DC bus.
start-up
Start-up
Fig. 16Fig. 15
Q5NQ1 Q4S
QF1
0
I
3
1
2
1
0
1
0
1
0
1
0
1
0
Q3BP
1
0
1
0
1
0
1
0
1
0
1
0
1
0
5
4
6
1
0
1
0
1
0
1
0
3
1
2
1
0
1
0
4
Q5NQ1
Q5NQ1
QF1
0
I
1
0
1
0
User’s Manual