1100A SERIES UPS
OWNERS / TECHNICAL MANUAL
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3-8
MITSUBISHI ELECTRIC 1100 SERIES UPS
3.5 PROCEDURE FOR CABLE CONNECTIONS
1. Confirm the capacity of the UPS being installed. Identify the input/output power terminal
blocks shown in Figure 3.7 or Figure 3.8.
2. Connect the grounding conductor from the input service entrance to the UPS ground bar.
3. Confirm that an external input circuit breaker sized to protect both the converter input and the
bypass lines is installed. Consult equipment nameplate for current ratings. Connect the AC
power source cables from the input service entrance to the UPS INPUT power terminals
identified as A10, B10, C10 and N10 in Figure 3.9. Input cables must be sized for an ampere
rating larger than the maximum current capacity of the UPS.
4. Refer to Table 3.6 for recommended cable sizes. Referring to Figure 3.9, connect UPS
OUTPUT load terminals A40, B40, C40 and N10 to load distribution panel.
5. Connect external signal terminal block as needed. Refer to Section 2.3, Figure 2.21 and
Figure 2.22 for functional description. AWG12, or less, shielded conductor is recommended.
NOTE: UPS power terminals are supplied with stud type fittings. It is
recommended that compression lugs be used to fasten all
input/output power cables. Refer to Table 3.7 for recommended
compression lugs and appropriate crimping tool
Table 3.6
Recommended Cable Size and Torque Requirements
UPS
Input Side * 1
DC Input Side
Output Side * 1
Capacity
(kVA)
Cable *
2
Size
Torque
(in. lbs)
Cable *
2
Size
Torque
(in. lbs)
Cable *
2
Size
Torque
(in. lbs)
10kVA
8 AWG or
larger
135 in. lbs
8 AWG or
larger
135 in. lbs
8 AWG or
larger
135 in. lbs
20kVA
4 AWG or
larger
135 in. lbs
4 AWG or
larger
135 in. lbs
4 AWG or
larger
135 in. lbs
30kVA
2 AWG or
larger
135 in. lbs
1 AWG or
larger
135 in. lbs
2 AWG or
larger
135 in. lbs
40kVA
1/0 AWG or
larger
135 in. lbs 2/0 AWG or
larger
135 in. lbs 1/0 AWG or
larger
135 in. lbs
50kVA
3/0 AWG or
larger
135 in. lbs 4/0 AWG or
larger
135 in. lbs 2/0 AWG or
larger
135 in. lbs
*1 - Voltage drop across power cables shall not exceed 3% of nominal source voltage.
*2 - Allowable ampere ratings based on 90
㺽
C insulation at an ambient temperature of 40
㺽
C.
No more than 3 conductors in a raceway without de-rating. Copper conductors assumed.
NOTE: Intended to upgrade in future input/output/battery wiring and branch
circuit protection will require upgrade.
!
NOTE
!
NOTE