G-Tec Sirius 20 kVA, Руководство пользователя

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16
I
NTERNAL
P
ROTECTIVE
D
EVICES OF THE
UPS
The table below shows the sizes of the isolators of the UPS and the sizes of the battery fuses (SWBATT): these devices
are accessible from the front of the UPS.
There are also indications about the internal fuses (not accessible) protecting the input and output lines and the
maximum input and rated output currents. To install the UPS, see the block diagram in the “USE” section of the
“Description” paragraph.
Fuses are to be replaced with ones of the same size and the characteristics indicated in the table below.
Isolators and internal protective devices
UPS
mod.
Non-automatic switches Fuses
[kVA]
UPS input /
Separate bypass
UPS output /
Maintenance
Rectifier input
fuse
Battery fuse Output fuse
Input
current
[A]
Output
current
[A]
SWIN / SWBYP
(optional)
SWOUT / SWMB SWBATT Max
*
Rated
10 40A(4P) 40A(4P)
25A gF 500V
(6.3x32)
32A gG 400V
(10x38)
25A gF 500V
(6.3x32)
20A 15A
12 40A(4P) 40A(4P)
25A gF 500V
(6.3x32)
32A gG 400V
(10x38)
25A gF 500V
(6.3x32)
24A 17A
15 63A(4P) 63A(4P)
2 x 20A gF
500V (6.3x32)
50A gG 400V
(14x51)
2 x 20A gF
500V (6.3x32)
29A 22A
20 63A(4P) 63A(4P)
2 x 20A gF
500V (6.3x32)
50A gG 400V
(14x51)
2 x 20A gF
500V (6.3x32)
38A 29A
* The max. input current refers to a rated load (PF = 0.9) and an input voltage of 346V,
and a battery charger charged with 4A.
SHORT CIRCUIT
If a failure occurs on the load, the UPS protects itself by limiting the value and duration of the current output (short-circuit
current). These values also depend on the operating status of the UPS at the time of the failure; there are two different
cases:
UPS in NORMAL OPERATION: the load is switched instantaneously to the bypass line (I
2
t=11250A
2
s): the
input line is connected to the output without any internal protection (blocked after t>0.5s)
UPS in BATTERY OPERATION: the UPS protects itself by providing a current equivalent to about 1.5 times the
rated current for 0.5s and turns itself off after this time has elapsed
BACKFEED
The UPS has internal protection against backfeed through metal separating devices.
There is an output on the relay board (optional) for activating a releasing device to be installed upstream from the UPS.
The UPS has an internal device (redundant bypass power supply) which, when a failure occurs on the
machine, activates the bypass automatically, thus keeping the load powered without any internal protection
and without any limitation to the power supplied to the load.
Under these emergency conditions, any disturbance present on the input line will affect the load.
See also the “USE” section of the “Redundant Auxiliary Power Supply for Automatic Bypass” paragraph.