- 15 -
The manoeuvres devices and all power connections of the UPS must be able to support the currents stated in the tab. 2.6,
in a permanent way.
If it were necessary, prepare, a backfeed protection to be installed in the UPS distribution board as it is showed in the circuit
diagram 2.6b
¡ATTENTION!
IT IS A MUST TO INSTALL EXTERNALLY TO THE UPS, AT THE MAINS INPUT, A CONTACTOR A PART FROM
THE PROTECTION CIRCUIT BREAKER, IN ORDER TO PROTECT AGAINST BACKFEED VOLTAGES, IN ACCORD-
ANCE WITH THE TABLE 2.6 AND THE FOLLOWING CIRCUIT DIAGRAM:
Diagram 2.6b
Inp
ut
.
UPS.
R
S
T
N
Out
put.
R
S
T
N
Byp
as
s.
U
V
W
N
Automatic bacfeed protection at the
input, external to the UPS
(EN-IEC 62040-1-1 parágrafo 5.1.4).
Tab.2.6
160
305
242
242
350
200
369
302
302
438
250
449
378
378
547
300
530
454
454
600
Output (A)
Battery discharge (A)
UPS Power (kVA)
Mains input (A)
Bypass input (A)