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9
8-18 kVA Connections
CAUTION: A qualified electrician must review and -
approve the customer-supplied wiring, circuit
breaker(s), power outlet, and intended loads. Ensure
correct line, neutral, and ground connections, and that
phase rotation is phase A leads phase B (leads phase
C, if third phase is used). See Table #5 in the
Appendix & Site Planning Data.
See Table #1 to the right and the figures on the following
pages for terminal details and block diagrams of UPS with
both single and optional dual input. Use 75 degrees C
copper wire in compliance with the NEC (NFPA 70) and all
applicable local codes.
Remove conduit-landing plates from UPS. Punch conduit
holes in these plates for both input and output
connections. Tighten wire connections according to unit
torque specification labels and Table #1.
Input
The UPS accepts two-phase or three-phase power.
Output
8 - 12 kVA: Hardwire output power to a customer-supplied
panelboard, or to optional distribution units. The
Configurable Distribution unit (in conjunction with Load
Modules) provides receptacle distribution. See
Distribution in the Options section.
15 - 18 kVA: Hardwire output power to a customer-
supplied panelboard.
Table #1 – Compression Field Connections
Connection Wire Size
Range (AWG)
Torque (lb.in)
8 –12 kVA Liebert UPStation S™
AC Input
Optional Dual AC Input
AC Output
#14 - #2.0
Ground and GEC #14 - #6
#2.0 - #6 = 45
#8 = 40
#10 - #14 = 35
15 - 18 kVA Liebert UPStation S™
AC Input
Optional Dual AC Input
AC Output
Optional Ext. Battery
Cabinet
Ground and GEC
#14 - #2/0
#2.0 - #6 = 45
#8 = 40
##10 - #14 = 35
1581EBD External Battery Cabinet
Input DC and Ground #14 - #2/0
#2.0 - #6 = 120
#8 = 40
#10 - #14 = 35
NOTES:
• 8 – 18 kVA systems require a local Grounding
Electrode per NEC 250.
• Minimum size grounding conductors per NEC. Parity
sized ground conductors recommended. Size Neutral
conductors for full capacity per NEC.
• Refer to NEC Article 250 and local codes for proper
wire sizing and grounding practices.
• UPS Output is a separately derived source when
operating on inverter. Output Neutral is bonded to
equipment ground internal to the UPS.
DB25
Communications Connector
(RS232, AS/400, LANs)
External Power
Management Load Module
Communications Connector
REPO
Connection
Bypass
Switch
External
Battery Cabinet
Connector
Output
Circuit
Breaker
Output Conduit
Landing Area
Input Conduit
Landing Area
Input
Circuit
Breaker
Battery
Circuit
Breaker
Variable
Speed
Fan
Optional
SNMP
Interface
8-12 kVA REAR VIEW
External Power
Management
Load Module
Communications
Connector
Bypass
Switch
Optional
SNMP
Interface
Optional DB25
Communications
Connector
(RS232, AS/400, LANs)
Output
Circuit
Breaker
Input
Circuit
Breaker
REPO
Connection
Battery
Circuit
Breaker
Input &
Output
Conduit
Landing
Plate
External
Battery
Conduit
Landing
Plate
Casters
Leveling Feet
Bottom Conduit Access Area
Terminal
Block
Access
Covers
15 - 18 kVA
Rear View