Protection Devices; Short - Circuit Protection; Protection Against Back - Feed; Input Line Thermal Magnetic Switches - Siel SAFEPOWER-EVO-HF 60 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
2 2
I t=110000A s; UPS 100kVA I
(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
When setting the power supply line upstream of the UPS, install a thermal magnetic switch with trip curve C (or D depending on
the type of load) as indicated in the following table:
Mod. UPS
60kVA
80kVA
100kVA
* 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
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
IV332 Rev.001 SIEL S.p.A.
Data di emissione: 2012-06-04
2 2
t=145000A s): the input line is connected to the output without any internal protection
-
FEED
Automatic external AC protections *
Network input
100A
125A
160A
Fuse type
gl / gG
aR
gl / gG
aR
gl / gG
aR
Separate bypass input (optional)
External DC protections
Fuse size [ A ]
capacity in Ah of the battery up to max 150A
2 x
2.5 x capacity in Ah of the battery up to max 150A
capacity in Ah of the battery up to max 200A
2 x
2.5 x capacity in Ah of the battery up to max 200A
capacity in Ah of the battery up to max 250A
2 x
2.5 x capacity in Ah of the battery up to max 250A
2 2
t=110000A s; UPS 80kVA
100A
125A
160A
Pag. 81 di 272 + FR