Cps Internal Protections; Battery Anti - Inversion Device; Deep Discharge Prevention - Gtec Saturn Manual Del Usuario

CPS
INTERNAL PROTECTIONS
The table below shows the sizes of the CPS isolators and the battery fuses (SWBATT) which are all accessible from the front of
the CPS. Moreover, the table shows the maximum input and the nominal output currents.
Fuses must be replaced with ones of the same type and of the same rating, as shown in the table.
CPS
Mod.
[kVA] CPS input / Separate bypass
SWIN / SWBYP
20 kVA 63A(4P)
30 kVA 100A(4P)
* The maximum input current refers to a nominal load (PF = 0,9), to a 346V+ input voltage, and battery charger under a 7A
charge.
SHORT CIRCUIT
If a fault occurs on the load, the CPS protects itself by limiting the value and the duration of the current supplied (short circuit
current). These values also depend on the CPS operating status at the time of the fault, which can be either:
▪
CPS in NORMAL OPERATION: the load is instantly commutated to the bypass line (CPS 30kVA I
2 2
40kVA I t=25000A
▪
CPS in BATTERY OPERATION: the CPS protects itself by supplying an output current which is about 1.5 the nominal
current for 0.5s, after which it shuts down.
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
This CPS is also equipped with an internal protection against backfeed through metal separation devices.
An optional output on the relay board is available for activating a release device to be installed upstream from the CPS.
This CPS has an internal device (redundant bypass power supply) which, in case a fault occurs, activates the bypass
automatically, thus maintaining the load powered with no internal protection and with no limit on the power supplied
to the load.
Under such emergency conditions, any disturbance on the input line will affect the load.
Please see the paragraph "Redundant auxiliary power supply for automatic bypass", in the "USE" section.
B -
ATTERY ANTI INVERSION DEVICE
In the event that the batteries are connected to the battery terminals with the polarity inverted, this device will protect the CPS
by interrupting the battery connections.
D
EEP DISCHARGE PREVENTION
To protect the batteries and the device, the CPS is equipped with a
battery deep discharge prevention system as required by standard
50171.
In the event that this protection system cuts in, battery charging will
restart automatically once normal power supply to the CPS is restored.
The deep discharge prevention system must be reset manually; for this
reason the display will clearly show an alarm related to this protection
system. This alarm will only disappear once the protection system has
been manually reset by pressing the Reset button (see adjacent
diagram).
Isolators and currents
Non-automatic switches
CPS output / Maintenance
SWOUT / SWMB
s): the input line is connected to the output with no internal protection (locked after t>0.5s)
63A(4P) 80A gG 400V (22x58)
100A(4P) 100A gG 400V (22x58)
76
Battery isolator
Input
Battery fuse current
[A]
SWBATT *
Max
54A
70A
2
t=20000A
Currents
Output
current
[A]
Nominal
46A
61A
2
s; CPS