6 power cables, Table 1 maximum steady state ac and dc currents, Power cables – Emerson Liebert NX 50 and 60 Hz User Manual
Page 20: Table 1, Maximum steady state ac and dc currents, Table 2, Warning
Single Module UPS Installation
8
1.6
Power Cables
The cable design must comply with the voltages and currents provided in this section, follow local wir-
ing practices and take into consideration the environmental conditions (temperature and physical
support media).
For cable entry terminal, refer to Figures 43, 48, 52 and 56.
!
WARNING
Before starting 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.
Check that these supplies are electrically isolated and post any necessary warning signs to
prevent their inadvertent operation.
Table 1
Maximum steady state AC and DC currents
UPS
RATING
(kVA)
NOMINAL CURRENT: Amps
BUSBAR STUD SIZE
Input Mains
with full battery
recharge
3ph + N
Bypass/Output
at full load
3ph + N
Battery at
minimum
battery
voltage
(400VDC)
Input/Output/
Bypass
Cables
Battery
Cables
(Bolts)
Torque
Load, Nm
(lb/ft)
380V
400V
415V
380V
400V
415V
Bolt
Ø holes
30
50
47
45
46
43
42
64
M6
7
-
5 (1.12)
40
65
62
60
61
58
56
85
60
97
92
88
91
86
83
128
M8
9
M10 Ø11
M8: 13 (2.9)
M10: 26 (5.8)
80
128
122
117
121
115
111
170
100
160
152
146
152
145
139
213
M10
11
120
191
181
175
182
174
167
255
140
222
211
204
212
201
194
298
160
254
241
232
242
230
222
340
200
317
301
290
303
288
277
426
For terminal location – refer to 5.0 - Installation Drawings
Table 2
Distance from floor to connection point on the equipment
UPS
Minimum Distance, mm (in)
UPS 30/40 kVA
UPS 60-80 kVA
UPS 100-120 kVA
UPS 140-200 kVA
Rectifier AC Input supply
350 (13.8)
305 (12)
324 (12.8)
Bypass AC Input supply
300 (11.8)
250 (9.8)
310 (12.2)
UPS Output AC
260 (10.2)
250 (9.8)
310 (12.2)
Battery Power
1030 (40.5)
230 (9)
360 (14.2)
Auxiliary cables:
Monitor board (U2)
1320(52)
1500 (59)
Communications
1070(42.1)
1250(49.2)
Earth
350 (13.8)
275 (10.8)
338 (13.3)
!
WARNING
Failure to follow adequate earthing procedures may result in electromagnetic interference or
in hazards involving electric shock and fire.