Emerson 7400 - Manual (Page 34)

25
Series 7400 Single Phase 1+N UPS
3.3 Connecting UPS Power Cables
WARNING
Ø Before cabling-up the UPS, ensure that you are aware
of the location and operation of the external isolators
that connect the UPS Input / Bypass supply to the
mains distribution panel.
Ø Check that these supplies are electrically isolated and
post any necessary warning signs to prevent their
inadvertent operation.
Cables can enter the UPS modules and battery cabinet either from
below or through either side. Side entry is made possible by
removing blanking pieces fitted in the side ventilation grills to reveal
the cable entry holes. This cable entry method allows the
equipment to be positioned on a solid floor without the need for
cable trenching and also allows cables to pass from one module to
the other when positioned side-by-side.
When connected as a one-plus-one Non Redundant system, the
UPS modules’ input and output cables must be rated to suit the
supported load rather than the individual module’s power rating.
This is due to the possibility of connecting the full load to the mains
via the Maintenance Bypass line of one module.
In a Redundant system this is unnecessary as each module is
individually rated to support the full load, and the input/output
cables can be sized to suit the modules’ rating according to the
table given below.
NOMINAL CURRENT (AMPS) 1 PH. UPS
INPUT MAINS BYPASS/ OUTPUT BATTERY
UPS
RATING
380V 415V 110V 230V
25
40
50
60
80
90
105
125
53
85
106
128
167
190
219
261
49
78
98
117
153
173
199
237
227
364
455
546
727
818
955
1136
109
174
217
261
348
391
457
544
68
110
136
163
216
240
279
331
3.3.1 Cable Entry
3.3.2 Cable Rating