Vertiv Liebert APM2 - Recommended CSA of UPS Cable; Selection of UPS I;O Switch; Distance between the UPS Connection Point and Floor

UPS Power
(kVA)
Rated Current (A) Bus Stud Bolt/Nut Specification
Maximum Input Current
1
Output/Bypass Current
2
at Full Load
Battery Discharge
3 and 4
Current (+, -, N) at
Rated Battery Voltage
Input, Battery,
Output,
Bypass/PE Cable
Recommended
Torque (Nm)
380 V 400 V 415 V
120 kVA 238 182 173 167 400 M8 11±10%
1. Maximum input current is calculated according to the low voltage input of 176 V (L-N) and 100% load percentage.
2. Maximum output/bypass current is calculated according to the rated voltage and 100% load percentage.
3. The battery discharge current is calculated according to the battery cell number of 32, EOD voltage of 1.6 V and 100% load percentage.
Table 4.1 Maximum Steady State AC and DC Currents
4.1.3 Recommended CSA of UPS cable
The recommended CSA of the UPS cable is given in Table 4.2 below.
Model Mains Input Output Bypass Input Battery Input (External Battery)
120 kVA
4 x 50 + 1 x 25 4 x 50 + 1 x 25 4 x 50 + 1 x 25 2 x 185 + 1 x 25
3-phase line, N line, PE line 3-phase line, N line, PE line 3-phase line, N line, PE line +, -, PE
Table 4.2 Recommended CSA of the UPS Single Module Cable (Unit: mm
2
, Ambient Temperature: 77 °F (25 °C)
4.1.4 Selection of UPS I/O switch
The air switch configuration in the UPS cabinet is shown in the table below, and the specific layout is shown in the figure
below. See Table 4.1 above for the values of I/O current and battery current.
Model Mains Input AC Output Bypass Input
120 kVA 250A/3P 250A/4P 250A/3P
Table 4.3 Cabinet Air Switch Configuration Table
WARNING! When the output switch is loaded and closed, it may cause the bypass switch to trip.
4.1.5 Distance between the UPS connection point and floor
UPS Connection Point
Minimum Distance ( mm)
Without Switch Single Switch Four Switches
Rectifier input 1743 1743 648
Bypass input 1743 1743 1225
AC output 1743 1743 1495/1559
Table 4.4 Minimum Distance Between UPS Connection Point and Floor
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Vertiv™ Liebert® APM2 30 to 120 kVA Modular UPS User Manual