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Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V
14
3.1.2 Cable rating
NOMINAL CURRENT (Amps)
3 Phase Input Mains with full
battery re-charge
(less 5% for 12 pulse)
1 Phase Output at full load
Battery at minimum
Battery Voltage
UPS
Rating
(kVA)
380V 400V 415V 110V 115V 120V 380V 400V 415V
30 63 60 58 272 260 250 83 80 77.5
40 84 80 77 364 349 334 110 106 103
50 105 100 96 454 434 416 137 133 129
60 126 119 115 545 521 500 164 159 155
80 165 157 151 727 695 666 219 213 206
120 245 233 223 1090 1043 1000 329 319 310
130 259 247 238 1181 1130 1083 357 346 336
150 300 285 275 1363 1304 1250 412 399 387
Table 3-1 UPS Module cabinet power cable rating
3.1.3 General Notes
The following are guidelines only and superseded by local regulations and codes of
practice where applicable:
1. The neutral conductor should be sized same as the output/ bypass current.
2. The earth conductor should be sized for carrying fault current for atleast 3 to 5
seconds or as guided by local electrical rules.
3. Consideration should be given to the use of paralleled smaller cables for heavy
currents, as this can ease installation considerably.
4. When sizing battery cables, a maximum volt drop of 3V d.c. is permissible at the
current ratings given in Table 3-1.
3.1.4 Cable Connections
The rectifier input, bypass, output and battery power cables (all require lug type
terminations) and are connected to busbars situated below the power isolator
switches - as shown in figure 3.1 for 80kVA and fig 3.2 for 120 /160/ 200kVA.
A terminal block X3 is used for connecting the control cables to the battery circuit
breaker and a second terminal block X4 is used for the external emergency stop
facility, external OFF inverter, ext. Bypass, etc. these are female spade type
connections (Fast-on 6.3 x 0.8) and are described later in Section 3.2
3.1.5 Safety earth
The safety earth busbar is located between the Bypass and Output power supply
connections as shown in the figure 3.1. The safety earth cable must be connected to
the earth busbar and bonded to each cabinet in the system.
All cabinets and cable trunking should be earthed in accordance with local
regulations.