Emerson Liebert FPC User manual

AC Power
For Business-Critical Continuity™
Liebert FPC™
User Manual - 15 kVA - 300kVA, 3 Phase, 50 & 60 Hz

i
TABLE OF CONTENTS
1.0 INSTALLATION INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.1 Unpacking and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1.1 Unpacking and Preliminary Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1.2 Handling Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1.3 Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1.4 Location Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1.5 Floor Pedestal Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Additional Distribution Mounting & Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2.1 Liebert FDC Distribution Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2.2 Distribution Cabinet Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 Power and Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3.1 Input Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3.2 Junction Box Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.3.3 System Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1.3.4 Grounding Electrode Conductor for FPCs With Transformer . . . . . . . . . . . . . . . . . . . . . . . . . 16
1.3.5 Output Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
1.3.6 Control Wiring Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.0 EQUIPMENT INSPECTION AND STARTUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
2.1 Internal Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.2 Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.0 INSPECTION AND STARTUP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
3.1 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.2 Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.3 Monitoring System Check-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.4 Equipment Connection Check-Out of Units With Distribution Cables. . . . . . . . . . . . . . . . . 28
4.0 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
4.1 Startup Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.1.1 Emergency Shutdown—If Emergency Power Off switch is supplied . . . . . . . . . . . . . . . . . . . 29
4.1.2 Normal System Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.1.3 Normal System Turn ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.1.4 Manual Restart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.2 Basic Monitor Panel (Units Without Monitoring) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.3 Power Monitor Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
5.1 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.2 Inspection and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.2.1 Inspection Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

ii
FIGURES
Figure 1 Typical cabinet and floor planning dimension data, 23" (584mm) cabinet, 15-125 kVA . . . . . . . . 3
Figure 2 Typical cabinet and floor planning dimension data, 47" (1194mm) cabinet 50-300kVA . . . . . . . . 4
Figure 3 Recommended minimum service and ventilation clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4 Floor pedestal details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 5 Electrical connection location for 23" (584mm) cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 6 Electrical connection location for 47" (1194mm) cabinet—Front view . . . . . . . . . . . . . . . . . . . . . 10
Figure 7 Electrical connection location for 47" (1194mm) cabinet—Rear view . . . . . . . . . . . . . . . . . . . . . . 10
Figure 8 Electrical connection location for 47" cabinet with SqD I-Line panelboard—Front view. . . . . . . 11
Figure 9 Electrical connection location for 47" cabinet with SqD I-Line panelboard—Rear view . . . . . . . 11
Figure 10 Low voltage control junction box connections, typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 11 Main input junction box connections, typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 12 Typical grounding arrangements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 13 Typical Liebert FPC equipment arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 14 Simplified shutdown circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 15 Typical control wiring for units without monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 16 Typical control wiring for units with monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 17 Basic monitoring panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 18 Power monitor panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
TABLES
Table 1 23-inch cabinet weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 2 47-inch cabinet weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Table 3 Liebert FPC heat output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 4 Suggested minimum input wire size data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 5 Main input circuit breaker interrupting rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 6 Main input junction box electrical connections (4 wire) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 7 Main input junction box without transformer electrical connections (5 wire) . . . . . . . . . . . . . . . 14
Table 8 Low-voltage (control) junction box dimensions, typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 9 Main input (power) junction box dimensions, typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 10 Minimum grounding electrode conductor size (AWG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 11 Panelboard main circuit breaker torque specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 12 Branch circuit breaker torque specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 13 Terminal block compression lug torque specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 14 Torque specifications, general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 15 ASCII interface default parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 16 RS-232 ASCII port customer commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 17 Monitored parameters data definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

1
IMPORTANT SAFETY INSTRUCTIONS
NOTE
Read the entire manual before installing or operating the system.
!
WARNING
The shipping bands may be under tension. Use appropriate eye, face, and hand protection to
safeguard against injury from band backlash.
!WARNING
Verify that all incoming line voltage (power) and low-voltage (control) circuits are
de-energized and locked out before installing cables or making connections, whether in the
junction box or in the unit.
Equipment inspection and start-up should be performed only by trained personnel. Lethal
voltages are present during start-up procedures. Electrical safety precautions must be
followed throughout inspection and startup.
Only qualified service personnel should perform maintenance on the Liebert FPC system. All
voltage sources to the unit must be disconnected before inspecting or cleaning within the
cabinet.
Lethal voltages exist within the equipment during operation. Observe all warnings and
cautions in this manual. Failure to comply may result in serious injury or death. Obtain
qualified service for this equipment as instructed.
The monitoring system contains a lithium battery for memory backup. There is a danger of
explosion if battery is incorrectly replaced. Replace only with same or equivalent type.
Dispose of used batteries according to the manufacturer’s instructions.
NOTE
The unit should not be loosened from the shipping pallet until all handling by fork lift or pallet
jack is completed.
All power and control wiring should be installed by licensed electricians and must comply with
the NEC and applicable codes.

Installation Instructions
2
1.0 INSTALLATION INSTRUCTIONS
1.1 Unpacking and Installation
1.1.1 Unpacking and Preliminary Inspection
A quality installation begins on the receiving dock.
1. Inspect the shipping crate(s) for damage or signs of mishandling before unpacking the unit(s).
Check the Shock-Watch™ indicator.
2. Remove the packing and inspect the equipment for any obvious shipping damages.
3. If the FPC was shipped in an export crate, open the shipping crate carefully.
Use care to avoid puncturing the container with sharp objects that would damage the contents.
4. Remove the packing and vapor barriers and inspect the equipment for any obvious shipping
damages.
5. If any damage is observed, immediately file a damage claim with the shipping agency and forward
a copy to:
Liebert Corporation
1050 Dearborn Drive
P.O. Box 29186
Columbus, Ohio 43229 USA
1.1.2 Handling Considerations
The Liebert FPC™(and cables, if furnished) is bolted to a wooden pallet to allow handling by forklift
equipment.
The Liebert FPC and cable reels are furnished with casters to allow the unit to be rolled into place
after it has been unbolted from the pallet. The FPC should be kept on the shipping pallet until it has
been moved by forklift as close as practical to its installation location.
Refer to the cabinet drawings furnished with the FPC for the unit’s size and weight. Typical cabinet
dimensions and weights are shown in Figures 1 and 2.
The route to the FPC’s installation area should be planned to ensure that all passages, including door-
ways, elevators, ramps and hallways, are large enough to accommodate the unit and that the floors
are strong enough to support the weight. Determine whether any corners or offsets would cause prob-
lems in maneuvering the unit.
Liebert recommends removing the exterior side panels, if supplied, before the unit is moved. This will
prevent scratches, dents and other damage to the panels.
NOTE
Read the entire manual before installing and operating the system. Upon receipt of a Liebert
FPC™, the installer should perform the following steps to ensure a quality installation.
NOTE
The units should not be loosened from the shipping pallet until all handling by fork lift or
pallet jack is completed. Complete internal inspection should be accomplished only after
equipment positioning and prior to electrical hookup.

Installation Instructions
3
Figure 1 Typical cabinet and floor planning dimension data, 23" (584mm) cabinet, 15-125 kVA
Table 1 23-inch cabinet weight
Unit
kVa
Weight, lb (kg)
60Hz 50Hz
Without
Transformer
15 1010 (458) 1060 (480) 750 (340)
30 1090 (494) 1140 (517) 750 (340)
50 1160 (526) 1235 (560) 750 (340)
75 1350 (612) 1450 (658) 800 (363)
100 1540 (699) 1665 (755) 800 (363)
125 1650 (748) 1775 (805) 800 (363)
Overall Dim.
39-1/2" (1003mm)
Including hinge
and bezel
projection
Overhead clearance
of 18" (457mm)
recommended
for cooling airflow
Minimum side
clearance of 42" (1067mm)
recommended for service access
if unit is equipped with
distribution monitoring option
Shaded areas indicate
recommended clearance
of 42" (1067mm) at front and
rear for service access
For units with bottom
cable access, clearance
of 6" (152mm) below
unit is recommended
for cooling airflow
and cable entry/exit
Dia. location
3/4" (19mm)
typical
Floor Pedestals
available from
6" (152mm) to 18"
(457mm)
.56" (14mm)
diameter; 4 holes
typical
6" (152mm) 6" (152mm)
23-1/2"
(597mm)
36.4"
(925mm)
Unit Base Outline
Unit Base Outline
Optional Floor Pedestals
Shaded area indicates
cable access and
cooling airflow
Footprint and Floor
Cutout Dimensions
36.4" (925mm)
78-1/2" (1995mm)
Front
Front
23-1/2" (597mm)
1.2"
(30mm)
1.2"
(30mm)
Overall Dimension
25.2" (640mm)
including side
panels
34" (864mm)
6"
(152mm)
11-1/2" (292mm)
6" (152mm)
3.2" (81mm)
8.3"
(211mm)
Cabinet Dimensional Data

Installation Instructions
4
Figure 2 Typical cabinet and floor planning dimension data, 47" (1194mm) cabinet 50-300kVA
Table 2 47-inch cabinet weight
Unit
kVA
Weight, lb (kg)
60 Hz 50 Hz Without Transformer
50 1891 (858) 1966 (892) 1335 (606)
75 1995 (905) 2095 (950) 1335 (606)
100 2191 (994) 2316 (1051) 1335 (606)
125 2298 (1042) 2423 (1099) 1360 (617)
150 2490 (1129) 2640 (1198) 1360 (617)
200 2610 (1184) 2810 (1275) 1360 (617)
225 2800 (1270) 3000 (1361) 1390 (631)
300 2845(1290) 3045 (1381) 1390 (631)
Overall Dim.
39-1/2" (1003mm)
Including hinge
and bezel
projection
Overhead clearance
of 18" (457mm)
recommended
for cooling airflow
Minimum side clearance
of 42" (1067mm) recommended
for service access if unit is
equipped with distribution
monitoring option
Shaded areas indicate
recommended clearance
of 42" (1067mm) at front and
rear for service access
For units with bottom
cable access, clearance
of 6" (152mm) below
unit is recommended
for cooling airflow
and cable entry/exit
Overall Dimension
48.6" (1235mm)
including side panels
78-1/2"
(1995mm)
47"
(1194mm)
36.4"
(925mm)
Unit Base Outline
Cabinet Dimensional Data
Shaded area indicates
cable access and
cooling airflow
Footprint and Floor
Cutout Dimensions
Front
1.3"
(33mm)
1.3"
(33mm)
33.8" (859mm)
35" (889mm)
6" (152mm)
6" (152mm)
Dia. location
3/4" (19mm)
typical
Floor Pedestals
available from
6" (152mm) to
18" (457mm)
9/16" (14mm)
diameter; 4 holes
typical
6" (152mm)
6" (152mm)
Unit Base Outline
Optional Floor Pedestals
36.4" (925mm)
1.5" (38mm)
2.3" (58mm)
Front
47" (1194mm)
43.8"
(1112mm)

Installation Instructions
5
1.1.3 Unit Preparation
The Liebert FPC may be easily removed from the shipping pallet and installed by customer person-
nel. A typical procedure is as follows:
1. Set the palletized assembly in a level area where there is enough room to roll the Liebert FPC and
entire cable assembly off the pallet onto the floor.
2. Cut the shipping bands.
3. Remove the factory-provided ramp from its shipping position.
One ramp is provided for every five units. Ramps are packed either in front of or on top of a set of
cable reel(s).
4. Place the ramp adjacent to the pallet to provide a smooth path from pallet to floor.
5. Remove side panels from the Liebert FPC, if supplied. An Allen wrench for the side panels is
furnished in the installation packet.
6. Remove the bolts and two mounting brackets holding the unit to the shipping pallet.
Mounting brackets are located on either side of the unit.
7. If cables are on wheeled cable reel(s), remove the bolts holding the reel(s) to the pallet and remove
the nailed-on shipping blocks.
8. Roll the unit off the pallet onto the floor, carefully guiding the cable reel(s) after it.
9. Roll the FPC and the cable reel(s) to the installation area. For units to be placed on a raised floor,
use care when positioning unit over the floor cutout to prevent the casters from falling through
the cutout.
1.1.4 Location Considerations
The Liebert FPC should be placed near the load(s) it will supply, preferably within the data center.
Equipment location should employ the shortest output distribution cable runs consistent with logical
equipment arrangement and allowance for expansion.
The FPC is intended for indoor installation in an area with ambient temperatures of 32°F to 104°F
(0°C to 40°C) with a relative humidity of 0% to 95% (non-condensing).
Bottom clearance is required for units with bottom entry/exit of cables. This clearance may be pro-
vided by a raised floor at least 6" (150mm) high. Figures 1 and 2 show the typical raised-floor cutout
dimensions for cables and cooling airflow.
When units are not installed on a raised floor, or if the raised floor will not support the unit, optional
floor pedestals may be used. (CSA regulations require FPC arrangements employing a raised floor.
Non-raised floor applications are not CSA approved.) Units with top cable exit provisions do not
require bottom clearance.
Recommended minimum service clearances are shown in Figure 3. The National Electrical Code
(NEC) requires the indicated front and rear clearances for service access. Clearance above the unit is
required for cooling airflow (exhaust). Units with optional distribution monitoring also require service
access clearance on the left side.
As do all electrical devices, the Liebert FPC produces heat under normal operation. (See Table 3.)
This heat must be accounted for when calculating the environmental conditions of the room.
!WARNING
The shipping bands may be under tension and may snap violently when cut. Use eye, face and
hand protection to guard against injury when the bands are cut.
!CAUTION
Before maneuvering the unit into its final position, read and follow all advisories in 1.1.4 -
Location Considerations.

Installation Instructions
6
Figure 3 Recommended minimum service and ventilation clearances
NOTE
1. Service access is required at the front and rear.
2. Service access clearance dimensions: 36" (914mm) for units up to 150V to ground. 42"
(1067mm) for units over 150V to ground.
3. Service access is required on the left side, if unit is equipped with Liebert Distribution
Monitoring Option.
Table 3 Liebert FPC heat output
Unit kVA
Full Load
Heat Output
BTU/Hr (kW)
15 2,500 (0.73)
30 4,600 (1.35)
50 6,200 (1.82)
75 8,150 (2.39)
100 9,900 (2.90)
125 11,500 (3.37)
150 12,500 (3.66)
200 15,500 (4.54)
225 15,800 (4.63)
300 18,450 (5.40)
Minimum clearance
of 6" (152mm) below
unit is recommended
for cable entry and exit
Minimum clearance
of 18" (457mm)
above unit is
recommended for
cooling airflow
Front and rear access
is required. See
Notes 1 and 2.
See Notes 2
and 3.

Installation Instructions
7
1.1.5 Floor Pedestal Installation
Floor pedestals are optional equipment that provide clearance for bottom cable entry or exit for FPC
units not installed on raised flooring. The pedestals are adjustable over a limited range (approxi-
mately 3-1/2" [89mm]) to allow leveling the FPC and minor adjustments in the unit’s installed height.
1. Insert the pedestal threaded shaft into the pedestal holes in the cabinet base as shown in
Figures 1 and 2.
2. Adjust the pedestal height by turning the welded nut/shaft assembly into or out of the pedestal
base as required.
3. Lock the height by tightening the jam nut against the pedestal base.
The pedestal may be anchored to the floor by means of the four holes in the base. Locations of
floor pedestals are shown in Figures 1 and 2.
Figure 4 Floor pedestal details
!CAUTION
Floor pedestals may be reverse-assembled for shipping. Before installation, the pedestals
should be reassembled as shown in Figure 4. When the pedestal is properly assembled, the
washer on top of the welded nut provides a bearing surface for the unit’s weight.
6"
(152mm)
square
2-1/4"
(57mm)
2-1/4"
(57mm)
2-1/4"
(57mm)
2-1/4"
(57mm)
.56" (14mm)
diameter
mounting holes
Pedestal
Base
Jam Nut
Welded Nut
Washer
Threaded
Shaft
3"
(76mm)

Installation Instructions
8
1.2 Additional Distribution Mounting & Wiring
For Liebert FPCs with more than four panelboards, the additional panelboards are furnished in Lie-
bert FDC enclosures, which are shipped separately from the Liebert FPC.
1.2.1 Liebert FDC Distribution Mounting
The Liebert FDC distribution cabinet has the same base dimensions as a 23" (584mm) cabinet FPC
(23-1/2" wide x 38" deep [597 x 965mm]) and may be mounted on either the left or right side of the FPC.
1. Provide a floor cutout for exit of output cables, as shown in Figure 1.
2. Remove the side panel, internal panel and the lower panel bracket from the FPC.
3. Remove the FDC side panel and internal panel, if supplied, and align the FDC with the FPC and
bolt the units’ frames together (hardware provided by others).
If floor pedestals are used for the FPC, two additional floor pedestals are required for the outside
corners of the FDC. See Figure 1.
4. Install the lower panel bracket on the opposite side of the FDC cabinet.
5. Make electrical connections. For details, see “Electrical Field Connections” drawings supplied
with the unit.
6. Install the FPC side panel on the FDC cabinet.
1.2.2 Distribution Cabinet Electrical Connections
Five field-supplied conductors (3-phase conductors, neutral and ground) are needed to connect the
FDC cabinet to the FPC cabinet in the field.
For Liebert FPCs with transformers, the distribution cabinet phase conductors are connected directly
to the transformer terminals:
Phase A to X1
Phase B to X2
Phase C to X3
The FDC’s neutral and ground conductors are connected to the FPC’s neutral busbar and main
ground busbar (see unit wiring diagram for location).
For Liebert FPCs without transformers, the distribution cabinet phase and neutral conductors are
connected to the corresponding output power distribution terminal blocks inside the FPC. The distri-
bution cabinet ground conductor is connected to the main ground busbar.
For all Liebert FPCs with current monitoring, route each distribution cabinet conductor through the
appropriate current transformer (CT) in the FPC.
1.3 Power and Control Wiring
Power and control wiring should be installed by licensed electricians. All power and control wiring
must comply with the NEC and applicable local codes.
1.3.1 Input Power Connections
If the FPC is furnished with a main input junction box, input power connections are made as detailed
in 1.3.2 - Junction Box Installation.
If a junction box is not furnished, the input power feeder is connected to the main input circuit
breaker located inside the FPC. (See Figures 5 through 8.)
NOTE
Distribution cabinet conductors must pass through the current transformers in the same
direction as the FPC panelboard conductors. Use the existing FPC panelboard wiring for
reference.
!WARNING
Verify that all incoming line voltage (power) and low-voltage (control) circuits are
de-energized and locked out before installing cables or making connections, whether in the
junction box or in the FPC.

Installation Instructions
9
To minimize disturbances from other loads in the building, the 3-phase power input to the FPC
should be supplied directly from the service entrance or other power source (a dedicated power
feeder).
The input feeder circuit should be sized in accordance with the NEC and any local building codes to
ensure the feeder’s ability to safely carry the system’s full load current, including losses.
Input feeder conductors should be sized for no more than 2% voltage drop. If operation at undervolt-
age conditions for extended periods of time is desired, the input feeders must be oversized.
Typical conductor size data is shown in Table 4. All connections must comply with the NEC and all
other applicable codes.
For units with a transformer, the main input feeder should consist of 3-phase conductors and one
(safety) ground conductor (3W + G).
For units without a transformer, the main input feeder must consist of 3-phase conductors, one neu-
tral and one (safety) ground conductor (4W + G).
Figure 5 Electrical connection location for 23" (584mm) cabinet
15006 - Rev. 0

Installation Instructions
10
Figure 6 Electrical connection location for 47" (1194mm) cabinet—Front view
Figure 7 Electrical connection location for 47" (1194mm) cabinet—Rear view
FPC15000 Rev. 0
FPC15000 Rev. 0

Installation Instructions
11
Figure 8 Electrical connection location for 47" cabinet with SqD I-Line panelboard—Front view
Figure 9 Electrical connection location for 47" cabinet with SqD I-Line panelboard—Rear view
FPC15002 Rev. 0
Square “D”
I-Line Panelboard
Detail B
Output Ground Busbar
Approx. 1/4" Thick
1.75"
(44.4mm)
1.75"
(44.4mm)
.88"
(22mm)
.88"
(22mm)
3.28" (83mm)
3.28" (83mm)
FPC15002 Rev. 0

Installation Instructions
12
Table 4 Suggested minimum input wire size data
kVA
Input
Voltage
Units with Transformers Transformerless Units
Input
FLA
Input
OPD
Suggested Feeder
Wire Size (AWG)
Full Load
Amps
MIB Trip
Amps
Suggested Feeder
Wire Size (AWG)
15
208 43 60 #6 AWG 42 60 #6 AWG
240 38 50 #8 AWG - - -
380 24 30 #10 AWG 23 30 #10 AWG
400 23 30 #10 AWG 22 30 #10 AWG
415 22 30 #10 AWG 21 30 #10 AWG
480 19 25 #10 AWG - - -
600 15 20 #12 AWG - - -
30
208 87 110 #2 AWG 83 110 #2 AWG
240 75 100 #2 AWG - - -
380 48 60 #6 AWG 46 60 #6 AWG
400 45 60 #6 AWG 43 60 #6 AWG
415 44 60 #6 AWG 42 60 #6 AWG
480 38 50 #8 AWG - - -
600 30 40 #8 AWG - - -
50
208 145 200 #3/0 AWG 139 175 #2/0 AWG
240 125 175 #2/0 AWG - - -
380 79 100 #2 AWG 76 100 #2 AWG
400 75 100 #2 AWG 72 90 #2 AWG
415 72 90 #2 AWG 70 90 #2 AWG
480 63 80 #4 AWG - - -
600 50 70 #4 AWG - - -
75
208 215 300 350 kcmil 208 300 350 kcmil
240 186 250 250 kcmil - - -
380 118 150 #1/0 AWG 114 150 #1/0 AWG
400 112 150 #1/0 AWG 108 150 #1/0 AWG
415 108 150 #1/0 AWG 104 150 #1/0 AWG
480 93 125 #1 AWG - - -
600 74 100 #2 AWG - - -
100
208 286 400 (2) #3/0 AWG * 278 350 (2) #2/0 AWG *
240 248 350 (2) #2/0 AWG * - - -
380 157 200 #3/0 AWG 152 200 #3/0 AWG
400 149 200 #3/0 AWG 144 200 #3/0 AWG
415 143 200 #3/0 AWG 139 175 #2/0 AWG
480 124 175 #2/0 AWG - - -
600 99 125 #1 AWG - - -
125
208 358 450 (2) #4/0 AWG * 347 450 (2) #4/0 AWG *
240 310 400 (2) #3/0 AWG * - - -
380 196 250 250 kcmil 190 250 250 kcmil
400 186 250 250 kcmil 180 225 #4/0 AWG
415 179 225 #4/0 AWG 174 225 #4/0 AWG
480 155 200 #3/0 AWG - - -
600 124 175 #2/0 AWG - - -

Installation Instructions
13
150
208 427 600 (2) 350 kcmil * 416 600 (2) 350 kcmil *
240 370 500 (2) 250 kcmil * - - -
380 234 300 350 kcmil 228 300 350 kcmil
400 223 300 350 kcmil 217 300 350 kcmil
415 215 300 350 kcmil 209 300 350 kcmil
480 185 250 250 kcmil - - -
600 148 200 #3/0 AWG - - -
200
380 312 400 (2) #3/0 AWG * 304 400 (2) #3/0 AWG *
400 297 400 (2) #3/0 AWG * 289 400 (2) #3/0 AWG *
415 286 400 (2) #3/0 AWG * 278 350 (2) #2/0 AWG *
480 247 350 (2) #2/0 AWG * - - -
600 197 250 250 kcmil - - -
225
380 352 450 (2) #4/0 AWG * 342 450 (2) #4/0 AWG *
400 334 450 (2) #4/0 AWG * 325 450 (2) #4/0 AWG *
415 322 450 (2) #4/0 AWG * 313 400 (2) #3/0 AWG *
480 278 350 (2) #2/0 AWG * - - -
600 222 300 350 kcmil - - -
300
380 469 600 (2) 350 kcmil * 456 600 (2) 350 kcmil *
400 446 600 (2) 350 kcmil * 433 600 (2) 350 kcmil *
415 430 600 (2) 350 kcmil * 417 600 (2) 350 kcmil *
480 372 500 (2) 250 kcmil * - - -
600 297 400 (2) #3/0 AWG * - - -
* Parallel feeders per NEC 300-20 and 310-4
FLA = Full Load Amps of Power Center
OPD = Overcurrent Protection Device inside FPC
Wire sizes based on NEC 2005, Table 310-16, using 75°C copper conductor
1. Main input power feeder should be a dedicated feeder direct from service entrance or other power source possible
2. Ground conductors recommended to be insulated conductors run with power conductors for increased system performance. Ground
conductor minimum size per NEC Table 250-66. Input power feeder conduit may be used as the safety ground conductor. When conduit
is used, adequate electrical continuity must be maintained at conduit connections to enclosures and throughout conduit run.
3. Input feeder wire size listed in this table is the minimum feeder size recommended. Larger wire size may be required because of voltage
drop or supply overcurrent protection device.
4. For transformerless units with 3-phase 4W + G input feeder larger wire size may be required because of excessive neutral current (see
NEC Table 310-15 note 4: For best performance, the unit should be located as close to load as practical.
Table 5 Main input circuit breaker interrupting rating
Standard interrupting rating*
208V 480V 380-415V 600V
65 kA 35 kA 35 kA 18 kA
* Refer to unit specification sheet for units equipped
with non-standard main input breakers.
Table 4 Suggested minimum input wire size data (continued)
kVA
Input
Voltage
Units with Transformers Transformerless Units
Input
FLA
Input
OPD
Suggested Feeder
Wire Size (AWG)
Full Load
Amps
MIB Trip
Amps
Suggested Feeder
Wire Size (AWG)

Installation Instructions
14
1.3.2 Junction Box Installation
Main input (power) and low-voltage (control) junction boxes are available for the Liebert FPC to sim-
plify customer connections.
The junction boxes, if used, can either be shipped with the system or can be advance-shipped for
installation during the roughing-in stage of new construction.
Liebert supplies flexible, 10-foot-long (3m) conduit with cables for connecting the junction boxes to the
unit. The junction boxes should be installed a maximum of 8 ft. (2.4m) from the feeder entrance of the
unit.
Liebert recommends centering the junction boxes under a floor tile that is easily removed.
Junction box connections must be installed in compliance with the NEC and all other applicable
codes.
Typical junction box connections are shown in Figure 16 and described in 1.3 - Power and Control
Wiring.
Dimensions are given on the drawings furnished with the unit. Typical dimensions of the junction
boxes are as follows:
!WARNING
Verify that incoming line voltage (power) and low-voltage (control) circuits are de-energized
and locked out before installing cables or making any connections in the junction box.
Table 6 Main input junction box electrical connections (4 wire)
Junction Box Size
Inches (mm) Electrical Connections
27 x 14 x 6
(686 x 356 x 152)
400A 3 pole power block with 1/2 -13 studs on 1-3/4" (44mm) centers
750A ground busbar with two sets of 3/8 - 16 studs on 1.75” centers
35 x 22 x 6
(889 x 559 x 152)
750A phase busbars with 1/2 -13 studs on 1-3/4" (44mm) centers
750A ground busbar with two sets of 3/8 -16 studs on 1-3/4" (44mm) centers
Table 7 Main input junction box without transformer electrical connections (5 wire)
Junction Box Size
Inches (mm) Electrical Connections
27 x 14 x 6
(686 x 356 x 152)
400A 3 pole power block with 1/2 -13 studs on 1-3/4" (44mm) centers
750A neutral busbar with two sets of 1/2 -13 studs on 1-3/4" (44mm) centers
750A ground busbar with two sets of 3/8–16 studs on 1-3/4" (44mm) centers
35 x 22 x 6
(889 x 559 x 152)
750A phase busbars with 1/2 -13 studs on 1.75” centers
1500A neutral busbar with two sets of 1/2 -13 studs on 1-3/4" (44mm) centers
750A ground busbar with two sets of 3/8 - 16 studs on 1-3/4" (44mm) centers
Table 8 Low-voltage (control) junction box dimensions, typical
Width, inches (mm) 8 (203)
Length, inches (mm) 10 (254)
Height, inches (mm) 4 (102)
Table 9 Main input (power) junction box dimensions, typical
Unit kVa
Input Voltage
208-240V 380-415V 480-600V
15-100 kVA, L x W x H, inches (mm) 27 x 14 x 6 (686 x 356 x (152)
125-150 kVA, L x W x H, inches (mm) 35 x 22 x 6
(889 x 559 x 152) 27 x 14 x 6 (686 x 356 x (152)
200 kVA, L x W x H, inches (mm) N/A 27 x 14 x 6 (686 x 356 x (152)
225 kVA, L x W x H, inches (mm) N/A 35 x 22 x 6
(889 x 559 x 152)
27 x 14 x 6
(686 x 356 x (152)
300 kVA, L x W x H, inches (mm) N/A 35 x 22 x 6 (889 x 559 x 152)

Installation Instructions
15
Figure 10 Low voltage control junction box connections, typical
Figure 11 Main input junction box connections, typical
1.3.3 System Grounding
The performance and safety of any power conditioning system depend on proper grounding.
Figure 12 shows the typical grounding arrangements for the Liebert FPC.
Equipment Grounding
Equipment grounding is primarily for safety. Correct implementation of grounding also enhances
equipment performance. All power feeders must include equipment grounding means as required by
the NEC and local codes.
An insulated ground conductor is recommended to be run in each feeder conduit. Ground conductors
must be at least the minimum size per NEC Table 250-66. Larger wire sizes may be used for
increased system performance.
If the input power feeder conduit is used as a grounding conductor, adequate electrical continuity
must be maintained at all conduit connections.
!CAUTION
Using isolating bushings in a metal conduit run can be a safety hazard and is not
recommended.
1 2 3 4 5 6 10 11 127 8 9 13 14 15 16 17 18 19 20 21
Building
Interface
Relay
Factory-supplied
low-voltage control cable
A
B
C
N
G
Customer input
power connection
3-phase, 3-wire + GND
for units with transformer
3-phase, 4-wire + GND
for units without transformer
Factory-supplied
input power cable
assemby
NOTE: Parallel cables
are used on units with
higher -ampacity
Neutral busbar and wire
furnished on units
without transformer

Installation Instructions
16
Signal Reference Grid
If the unit is used to supply power to a computer room or area that is equipped with a signal reference
grid or a grounded raised-floor stringer system, a grounding conductor should be connected from the
system ground bus to the grid or floor system. This conductor should be stranded or braided #8 AWG
or larger, and as short as practical. Less than 3 ft. (1m) is recommended.
1.3.4 Grounding Electrode Conductor for FPCs With Transformer
Required by code - The Liebert FPC with transformer must be grounded according to the safety
practices of NEC 250-26. A local grounding electrode conductor is recommended in addition to the
equipment safety ground which is normally run with the input power conductors. (See Figures 5
through 8.)
As shown in Figure 12, the grounding electrode conductor is run from the unit to the nearest effec-
tively grounded location (listed in order of preference):
• Building steel
• Metal water pipe
• Other made grounding electrode
The grounding electrode conductor’s size is based on the secondary circuit conductors. Table 10
shows the minimum recommended grounding electrode conductor according to the NEC
(Table 250-66).
Recommended methods for running the grounding electrode conductor (arranged by preference for
system performance; as acceptable by local and other applicable codes):
• Outside of conduit (where not subject to damage)
• Inside non-metallic conduit
• Inside non-ferrous conduit
• Inside ferrous conduit, bonded to the ferrous conduit at both ends, as acceptable by local and other
applicable codes
Table 10 Minimum grounding electrode conductor size (AWG)
kVA
Output Voltage
208V 380V 415V
15 8 8 8
30 8 8 8
50 4 8 8
75 2 6 6
100 0 4 4
125 0 2 2
150 00 2 2
200 00 0 0
225 00 0 0
300 00 0 0
AWG wire size based on 75°C copper conductors