Protection Devices; Short - Circuit Protection; Protection Against Back - Feed; Input Line Thermal Magnetic Switches - Gtec SATURN Serie Manuel D'installation Et D'utilisation

P
ROTECTION DEVICES
S -
HORT CIRCUIT PROTECTION
In the presence of a fault on the load, the UPS limits the value and duration of the output current (short circuit current) for protection.
These values are also functions of unit status at the time of the fault. Two different cases can be distinguished:
 UPS in NORMAL OPERATION: load is switched instantly on the bypass line (UPS 60kVA I
I 2 t=110000A 2 s; UPS 100kVA I
without any internal protection (blocked after t>0.5s)
 UPS in BATTERY-LED OPERATION: The UPS protects itself by supplying a current of about 1.5 times the nominal
current in output for 0.5s, switching itself off after this amount of time
P
ROTECTION AGAINST BACK
The UPS is equipped with internal protection against backfeed via internal metal separation devices (Inverter contactor, see "UPS
block diagram").
I
NPUT LINE THERMAL MAGNETIC SWITCHES
Install a trip switch a with C (or D based on the type of load) trip curve on the power supply line upstream of the UPS, following
the information given in the table below:
Mod. UPS
60kVA
80kVA
100kVA
125kVA
* In the case of non-linear loads, properly oversize neutral line N after on-site assessment
If the protection device upstream to the UPS interrupts the neutral conductor, all phase conductors must also be
interrupted at the same time (4-pole switch).
B
ATTERY LINE
Surge protector and a cut-off device must be provided on the UPS external battery line.
The size and type of fuses must be selected on the basis of the capacity of the installed battery box, referring to the table below.
Mod. UPS
60kVA
80kVA
100kVA
125kVA
Example: the following fuses can be used with UPS 60kVA and 65Ah batteries: 125A (130A) gl/gG or 150A type aR
Ensure that the UPS has been fully switched off before handling the external UPS battery line switch/fuses
2 t=145000A 2 s; UPS 125kVA I
-
FEED
Automatic external AC protections *
Network input
100A
125A
160A
250A
Fuse type
gl / gG
aR
gl / gG
aR
gl / gG
aR
gl / gG
aR
2 t=145000A 2 s): the input line is connected to the output
External DC protections
Fuse size [ A ]
2 x capacity in Ah of the battery up to max 150A
2.5 x capacity in Ah of the battery up to max 150A
2 x capacity in Ah of the battery up to max 200A
2.5 x capacity in Ah of the battery up to max 200A
2 x capacity in Ah of the battery up to max 250A
2.5 x capacity in Ah of the battery up to max 250A
2 x capacity in Ah of the battery
2.5 x capacity in Ah of the battery
- 79 -
2 2
t=25000A
Separate bypass input
(optional for 60-80-100KVA )
100A
125A
160A
250A
s; UPS 80kVA