Internal Protective Devices Of The Cps - Gtec Saturn CPS 10 Mode D'emploi

I P
NTERNAL ROTECTIVE
The table below shows the sizes of the isolators of the CPS and the sizes of the battery fuses (SWBATT): these devices
are accessible from the front of the CPS.
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 CPS, 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.
CPS
Non-automatic switches
mod.
CPS input /
[kVA]
Separate bypass
SWIN / SWBYP
10 40A(4P)
15 63A(4P)
* The max. input current
and a battery charger charged with 4A.
SHORT CIRCUIT
If a failure occurs on the load, the CPS 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 CPS at the time of the failure; there are two different
cases:
▪
CPS in NORMAL OPERATION: the load is switched instantaneously to the bypass line (I
input line is connected to the output without any internal protection (blocked after t>0.5s)
▪
CPS in BATTERY OPERATION: the CPS 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
The CPS is equipped with an auto-restart function. Following a short circuit and protection system cut-in, the CPS will
restart within 1 second of the fault occurring. If the fault persists after the fifth attempt to restart, the CPS will shut down.
If this occurs the problem downstream must be solved in order for normal CPS operation to be restored.
BACKFEED
The CPS 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 CPS.
The CPS 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.
D CPS
EVICES OF THE
Isolators and internal protective devices
CPS output / Rectifier input
Maintenance fuse
SWOUT / SWMB
25A FF 500V
40A(4P)
(6.3x32)
2 x 20A FF
63A(4P)
500V (6.3x32)
refers to a rated
- 76 -
Fuses
Battery fuse
SWBATT
32A gG 400V 25A FF 500V
(10x38)
50A gG 400V
(14x51) 500V (6.3x32)
load (PF = 0.9) and
Input
Output fuse current
[A]
*
Max
20A
(6.3x32)
2 x 20A FF
29A
an input voltage of
2
t=11250A
Output
current
[A]
Rated
15A
22A
346V,
2
s): the