Emerson Liebert PPC 15-30 kVA Instruction manual

POWER CONVERSION/DISTRIBUTION
Precision Power Center
TECHNICAL DATA MANUAL
Three Phase
15-225 kVA
50 & 60 Hz

i
Table of Contents
NO-COMPROMISE POWER DISTRIBUTION AT LOWER INSTALLED COST . . . . . . . . . . . . . . . . . . . . . .1
LIEBERT PACKAGED POWER SYSTEM ADVANTAGES COMPARED TO CONVENTIONAL,
BUILT-UPSYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
CAPACITIES AND CONFIGURATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
STANDARD FEATURES FOR ALL SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Panelboards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
ADDITIONAL FEATURES FOR ALL SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
HARMONICS SOLUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
SYSTEM MONITORING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Power Monitor Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Remote Monitoring Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PHYSICAL/ELECTRICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
HEAT OUTPUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
SYSTEM SIZING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
SERVICE ACCESS AND CLEARANCE REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Figures
Figure 1 Conventional built-up system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2 Liebert Precision Power Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 3 Liebert Precision Power Center—Top Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 4 Precision Power Center, 1-4 panelboards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 5 Top Exit Precision Power Center, 1-2 panelboards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 6 Precision Power Center diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 7 Dimensions, clearances, 1 panelboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 8 Dimensions, clearances, 2 panelboards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 9 Dimensions, clearances, 3 panelboards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 10 Dimensions, clearances, 4 panelboards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 11 Dimensions, clearances, Top Exit unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Tables
Table 1 Features available by model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 2 Electrical and mechanical characteristics, 60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 3 Electrical and mechanical characteristics, 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 4 Electrical and mechanical characteristics, Top Exit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 5 Heat output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

ii

No-Compromise Power Distribution at Lower Installed Cost
1
NO-COMPROMISE POWER DISTRIBUTION AT LOWER INSTALLED COST
Liebert Precision Power Centers offer distribution, computer-grade grounding, and monitoring. Unlike con-
ventional built-up systems, these Liebert packaged power systems provide easy low-cost installation, simple
relocation, security, proven design and performance, electrical isolation, and effective noise suppression.
Figure 1 Conventional built-up system
Figure 2 Liebert Precision Power Center
Figure 3 Liebert Precision Power Center—Top Exit
Input
Circuit
Breaker
Output
Circuit
Breaker
Isolation Transformer
4-wire
208/120V
Power Panels with Rigid
Conduit Distribution
REPO
Circuit
Breaker
REPO
Power Panels with Flexible
Interconnecting Cables
Control
J-Box
Power J-Box
Circuit
Breaker
REPO
Top Exit Precision
Power Center

Liebert Packaged Power System Advantages Compared to Conventional, Built-Up Systems
2
LIEBERT PACKAGED POWER SYSTEM ADVANTAGES COMPARED TO CONVENTIONAL,
BUILT-UPSYSTEMS
Desirable Features Conventional Built-Up Systems Liebert Packaged Power System
Proven System
Design
No. Each site is a one-of-a-kind installation.
“Design” depends on engineer and installer.
Yes. Liebert power systems are complete,
proven-design, factory tested to ensure
consistent performance. Designed-in
distribution flexibility accommodates all
installation sites.
Agency Approved
Not as a system. Even though listed
components may be used, site-fabricated
distribution is subject to acceptance by local
inspecting authorities.
Yes. UL listing as a complete system is an
assurance of safety.
Factory Tested No. Testing of performance is done at the site,
if at all.
Yes. Factory testing the complete system
ensures performance and safety of the system.
Power Quality
Improvement
Doubtful. Because of the variables in design
and installation, site-fabricated distribution
does not consistently offer computer-grade
power isolation or ground systems.
Yes. Because packaged power systems have
shielded isolation transformers close to the
load, they offer power line noise attenuation
and controlled grounding.
Computer-Grade
Grounding
Difficult. Since site-fabricated distribution
seldom includes an isolation transformer in the
computer room, a local single point ground
system that minimizes common mode
disturbances is difficult to establish.
Yes. The packaged power system with
isolation transformer automatically establishes
a local single-point ground for the critical load.
The power grounding point is the same as the
computer system grounding point, minimizing
common mode disturbances.
Secure Distribution
Possibly. Only if the entire distribution panel is
dedicated to the computer and the panel is in
the computer room.
Yes. Power distribution panel is in the
computer room. Access is limited to authorized
personnel.
Circuit Identification
Possibly. Circuit number and receptacle
references might be supplied, depending on
the installing electrician and available
information.
Yes. Identification tags adjacent to each circuit
breaker provide circuit identification and
description of load served. Each cable is
tagged with circuit number and cable length.
Monitoring
Seldom. Some add-on monitoring systems are
available, but monitoring also depends on the
installing electrician and available information.
Yes. Built-in power parameter monitoring,
alarm, and control capabilities are standard in
packaged power systems.
Ease of Installation No. All site-fabricated distribution wiring
becomes part of premises wiring.
Yes. A packaged system requires only a single
connection to the premises wiring.
Easy System
Expansion
No. Conduit installation and wire pulling is time-
consuming, and can hamper operations while
in progress.
Yes. New cable(s) can be routed quickly with
minimal disruption.
Easy System
Rearrangement
No. Site-fabricated distribution cannot be easily
rearranged. Old conduit and wiring must be
removed and new installed.
Yes. Even after major equipment
rearrangement, redistributing power from
packaged systems becomes a simple matter of
re-routing the flexible interconnecting cables.
Easy To Move
No. New distribution must be built at the new
site and old conduit and wiring usually must be
removed from the former site.
Yes. The package is easily moved with the
computer system to the new site.

Capacities and Configurations
3
CAPACITIES AND CONFIGURATIONS
Liebert packaged power systems provide isolation, monitoring control, conditioning, and local single-point
ground to ensure computer-grade power.
With sizes ranging from 15 kVA to 225 kVA in a wide variety of configurations, the Liebert packaged distribu-
tion and conditioning systems can meet the requirements of almost any application.
Figure 4 Precision Power Center, 1-4 panelboards
15-30 kVA, 1 panelboard 50-225 kVA, 4 panelboards
50-225 kVA, 3 panelboards50-125 kVA, 2 panelboards

Capacities and Configurations
4
Figure 5 Top Exit Precision Power Center, 1-2 panelboards
Figure 6 Precision Power Center diagram
15-30 kVA, 1 panelboard 50-225 kVA, 2 panelboards
High
Voltage
J-Box
Low
Voltage
J-Box
Surge
Arrester
Input
Circuit
Breaker
Remote
Monitoring
System
Monitoring
and
Control
Single Point
Ground
Spike
Suppression
Module
Local
Display
Subfeed
Output
Breaker
Main
Circuit
Breaker
Main
Circuit
Breaker
Output
Panelboard
Output
Panelboard
Shielded
Isolation
Transformer

Standard Features for All Systems
5
STANDARD FEATURES FOR ALL SYSTEMS
All Liebert distribution and conditioning systems
incorporate standard features that ensure load pro-
tection and simplify maintenance.
Precision Power Centers use quality, dry type,
shielded isolation transformers for noise reduction
up to 120 dB, with harmonic voltage distortion of
0.5 percent. Depending on kVA capacity, output
impedance is between 3 and 5.5 percent, while full-
load efficiency is between 96.5 and 98 percent.
The transformer has temperature sensors in the
windings to provide an alarm if internal temperature
exceeds 180°C. It will shut down the system if inter-
nal temperature exceeds 200°C. Full Class H 220°C
transformer insulation and all copper windings are
used for long life and efficient operation.
A main input circuit breaker provides either manual
control, or automatic shutdown of the system in the
event of an overcurrent condition. The breaker is
sized for 125 percent of the system input full load
amperes. In addition to manual and thermal-mag-
netic trip, the input breaker can be tripped by an
electrically actuated shunt trip mechanism. As a
standard feature, the shunt trip of the input circuit
breaker is activated by the 200°C temperature sen-
sor, local Emergency Power Off switch, and Manual
Restart circuit.
The local Emergency Power Off (EPO) switch is an
illuminated push button, easily accessible for emer-
gency shutdown, but fully guarded by a hinged cover
to prevent accidental operation.
The manual restart circuit shunt-trips the main
input breaker whenever input power fails. This iso-
lates the system from repetitive power applications
during fault-clearing operations by the utility, and
allows an orderly restart of the system when normal
power returns.
The manual restart circuit can be disabled by the
manual restart select switch. The auto position of the
switch defeats manual restart, and allows the condi-
tioner to automatically restart when power returns.
Auto restart is useful for unattended remote sites
where the load can automatically restart, and in
those applications where the manual restart function
is provided elsewhere in the system.
The low-voltage shunt trip circuit also allows system
shutdown by external relays, Remote Emergency
Power Off (REPO) switches, or other remote devices.
A double-pole, double-throw (dpdt) building interface
relay is powered by a 24 VDC supply from the output
of the unit. Energized whenever the system is on, the
relay drops out if the output voltage disappears. The
relay can be used for remote alarming of system
shutdown, or shutdown interface with additional
loads such as environmental control units.
Power conditioner system components are housed in
a welded steel frame with removable panels for max-
imum accessibility to the interior. For safety and
security, any panels that provide access to high volt-
age require a tool for removal.
Panelboards
One 42-pole panelboard is provided on 15 and
30 kVA Precision Power Centers. Two 42-pole panel-
boards (for a total of 84 poles) are provided on 50
through 125 kVA Precision Power Centers. Three
42-pole panelboards (for a total of 126 poles) are pro-
vided on 150 through 225 kVA Precision Power Cen-
ters. (The three-panelboard configuration is not
available on Top Exit units.) Each panelboard is
enclosed for safety and has individual isolated neu-
tral and safety ground busbars.
Each panelboard is protected by a main circuit
breaker, which also allows manual shutdown of the
entire panelboard without affecting the other panel-
board(s).
Output circuits are protected by single-, two-, or
three-pole thermal-magnetic molded-case branch cir-
cuit breakers sized specifically for the load to be
served. (Standard panelboards use plug-in breakers.)
Shielded Isolation Transformer Temperature Sensors Input Circuit Breaker

Additional Features for All Systems
6
ADDITIONAL FEATURES FOR ALL SYSTEMS
Flexible Output Cables and Terminations
A flexible output cable
system is available for
Precision Power Centers.
Insulated cable conduc-
tors are protected by jack-
eted, liquid-tight, flexible
steel conduit with an inte-
gral copper shielding con-
ductor. Each output cable
is fabricated to the specified length and type of ter-
mination to match the equipment it will be connected
to. “Add-on” UL listed cables for field installation are
also available.
Terminations include receptacles to match equip-
ment plugs and conduit termination fittings with
conductor pigtails for hard wire connection.
Additional Pole Capacity
Additional panelboard pole capacity is available for
all power distribution units.
An additional 42-pole panelboard can be added to the
Precision Power Center for a total of 84 poles.
The Precision Power Center can have three 42-pole
panelboards for a total of 126 poles. (The three-pan-
elboard configuration is not available on Top Exit
units.) For additional poles, distribution side sections
can be added. Each side section provides another
42-pole panelboard.
Optional Panelboard Types
Branch circuit panelboards that accept bolt-in circuit
breakers are optional, as are panelboards for plug-in
or bolt-in breakers manufactured by Square-D Com-
pany.
Subfeed Output Circuit Breaker
A subfeed output circuit
breaker, powered ahead of
the output panelboards, is
available on the Precision
Power Center to feed a
remote distribution unit,
panelboards, or other
loads. Multiple Subfeed
Output Breakers are
available upon request.
High-Voltage Junction
Box With Flexible Input
Cable
The high-voltage junction
box can be installed under
a raised floor system. The
junction box contains ter-
minals for connecting the
incoming power line and
ground conductors. A
10-foot (3 m) flexible cable
is furnished for connec-
tion between the junction
box and the power conditioning system.
Low-Voltage Junction Box With Flexible Input
Cable
The low-voltage junction box
can be installed under a
raised floor. It contains ter-
minals for connection of all
building interface alarms or
controls, and all Remote
Emergency Power Off
switches. A 10-foot (3-meter)
flexible control cable for the
system is furnished for con-
nection between the junc-
tion box and the power conditioning system.
Secondary Class Surge Arrester
A secondary class surge
arrester using high capac-
ity utility-grade metal
oxide resistors is wired to
all three phases of the
input power to shunt volt-
age surges to building
ground. The arrester is
rated for a maximum
FOW spark-over of 3200 volts with maximum dis-
charge voltage of 2.2 kV at 1500 amperes, assuming
a standard 8 x 20 microsecond waveform. The surge
arrester provides protection against high voltage
surges that can cause insulation or wiring failures.

Additional Features for All Systems
7
Spike Suppression Module
The spike suppression module consists of AC filter
capacitors and dynamic peak limiting devices with a
response time of less than 1 nanosecond. Normal mode
high frequency noise is attenuated, while high-speed,
high-energy transients are limited to a safe level.
Transformerless System
(Not Available on Top Exit Units)
The Precision Power Center can be supplied without
a transformer for use with separate power condition-
ing systems. If step-down and isolation are not neces-
sary, transformerless systems provide the packaged
power system advantages of security, distribution,
monitoring, and upgrade flexibility.
Remote Emergency Power Off (REPO) Switch
Pressing the REPO push but-
ton activates the shunt trip
mechanism of the main input
circuit breaker, shutting down
the system.
The illuminated and fully
guarded REPO button is
mounted in a wall box. The
assembly includes 50 feet
(15.2m) of 3-conductor cable for
wiring to the unit. Additional
lengths of cable are available.
Floor Pedestals
In rooms without a raised
floor, the floor pedestals pro-
vide space for the bottom
entrance/exit of cables in Pre-
cision Power Center. The
height of the floor pedestals is
customer-specified. Standard
floor pedestal height range is
adjustable from 8.6 to 13.25 in. (218 to 336 mm).
Other available ranges: 6 to 8.5 in. (152 to 216 mm),
and 13.5 to 18 in. (343 to 457 mm). Non-raised floor
applications for the Precision Power Center are not
CSA approved.
Transient Suppression Plate
The transient suppression plate is a one-square-
meter plate mounted to (and bonded to) the high-
voltage junction box. It reduces the effects of tran-
sients on the ground system by providing a capaci-
tive coupling to building steel.
Phase Rotation Meter
The phase rotation meter is a hand-held instrument
with clip-on leads for connecting to the circuit under
test. The meter shows the circuit phase rotation in
“ABC” or “BAC” sequence.
The phase rotation meter can verify rotation
sequence of any circuit up to 600 volts.
Table 1 Features available by model
PPC
15-30 kVA
Top Exit
15-30 kVA
PPC
50-125 kVA
Top Exit
50-150 kVA
PPC
150-225 kVA
Panelboards
42 poles
standard
(one 42-pole
panelboard)
42 poles
standard
(one 42-pole
panelboard)
84 poles
standard
(two 42-pole
panelboards)
84 poles
standard
(two 42-pole
panelboards)
126 poles
standard
(three 42-pole
panelboards)
Flexible Output Cables and
Terminations Available Available Available Available Available
Additional Pole Capacity Optional 84
poles
Optional 84
poles
Optional 126 or
168 poles
Optional 126
poles
Optional 168 or
210 poles
Optional Panelboard Types Optional Optional Optional Optional Optional
Subfeed Output Circuit
Breaker Not available Not available Optional (up to 225 A) Not available Optional (up to 400 A)
High-Voltage Junction Box
with Flexible Input Cable Standard Not available Standard Not available Standard
Low-Voltage Junction Box
with Flexible Input Cable Optional Not available Optional Not available Optional
Secondary Class Surge
Arrester Optional Optional Optional Optional Optional
Spike Suppression Module Optional Optional Optional Optional Optional
Transformerless System Optional Not available Optional Not available Optional
Remote Emergency Power
Off (REPO) Switch Optional Optional Optional Optional Optional
K-20 Transformer Optional Optional Optional Optional Optional
Multi-Winding Transformer Optional Optional Optional Optional Optional
Floor Pedestals Optional Not available Optional Not available Optional
Transient Suppression Plate Optional Not available Optional Not available Optional

Harmonics Solutions
8
HARMONICS SOLUTIONS
Solutions to Harmonics Problems
Precision Power Centers are available with several
harmonic solution options, along with the standard
product features, to provide flexible power distribu-
tion for today’s nonlinear loads.
The basic Precision Power Center is designed to
accommodate moderate levels of harmonic currents.
All Precision Power Center isolation transformers
provide cancellation of the load triplen harmonic cur-
rents and are designed to tolerate neutral currents
up to 1.73 times full load. When severe levels of har-
monic currents are anticipated, several additional
power center features are available.
K-Factor Transformers
Shielded isolation transformers with a K-20 rating
are specially designed to minimize the heating
effects of the load’s harmonic currents and to tolerate
full harmonic loading without overheating.
Multi-Winding Transformers
Shielded isolation transformers with multiple sec-
ondary windings that are phase shifted provide can-
cellation of the load’s non-triplen harmonic currents.
SYSTEM MONITORING
Monitoring systems for Liebert power conditioners range from temperature sensing to multiple-parameter
monitoring with remote display and printout.
All units are equipped with a guarded and illuminated Local Emergency Power Off switch; provisions for con-
necting Remote Emergency Power Off switch; selectable auto or manual restart feature, to allow an orderly
system restart after a power failure; a summary alarm contact; and a building interface relay.
Power Monitor Panel
True RMS techniques are used to provide accurate
measurements of Precision Power Center operation,
while the high visibility Liquid Crystal Display pro-
vides clear reporting. The microprocessor-based
power monitoring system continuously monitors and
sequentially displays the following parameters:
• Input voltages, line-to-line for each phase
• Output voltages, line-to-line and line-to-neutral
for each phase
• Output currents for each phase, including neutral
and ground currents
• Output voltage THD for each phase
• Output current THD, K-factor and crest factor for
each phase
• Output power including kVA, KW, KW-hours,
power factor, percent load and output frequency
Features Comparison Basic System
With K-Factor
Transformer
With Multi-Winding
Transformer
Designed for nonlinear loads X X X
Neutral sized for greater than 1.73X FLA X X X
Available with multiple outputs for mainframe computers X X X
Reduces harmonic current distortion X X X
Improves harmonic power factor X X X
Cancels triplen (3rd, 9th, 15th, etc.) harmonics X X X
Tolerates higher levels of harmonic currents X X
Cancels non-triplen (5th, 7th, etc.) harmonics X

System Monitoring
9
The monitor panel also provides warning of out-of-
spec conditions through audible alarm and displayed
alarm messages. All alarmed conditions are retained
in a non-volatile memory until reset. Alarm thresh-
olds are adjustable, to meet individual site needs.
Alarmed conditions include:
• Output overvoltage
• Output undervoltage
• Output voltage THD
• Output overcurrent
• Neutral overcurrent
• Ground overcurrent
• Transformer overtemperature
• Frequency deviation
• Phase sequence error
• Phase loss
• Five customer-specified alarm conditions
For additional application flexibility, the following
alarms can be configured to shut down the Precision
Power Center-output over/under voltage; phase
sequence error; phase loss; ground overcurrent.
Through a two-conductor communications cable, the
system can communicate alarms and monitored condi-
tions to a Liebert SiteScan central monitoring system.
An isolated RS-232 ASCII communication port is pro-
vided for communication to other monitoring systems.
Basic Temperature Monitoring Panel
The Transformer Overtemperature alarm indicator
is a part of the 180°C transformer temperature sens-
ing circuit. This configuration is optional on all units.
Remote Monitoring Systems
SiteScan
SiteScan is an on-line center for monitoring and con-
trolling all support systems in a large data process-
ing installation. SiteScan provides early warning
alarms and total site management data. A software-
based system using a microcomputer as the central
processing center, SiteScan is programmable, menu-
driven, and upgradeable.
Four primary site management programs are built
into SiteScan:
•Alarm functions provide instant warning of
potential problems. A seven level selection of
options for response to each alarm offers total flexi-
bility in designing a custom-tailored alarm system.
•Control functions allow critical setpoints and
sensitivities to be adjusted by remote control for
dynamic, single-point site management. Password
access preserves site security.
•Status functions provide complete information
on all computer support systems, including real-
time status of all monitored parameters and any
alarm conditions.
•History functions offer database management
capabilities. These functions track, store and
graphically display crucial data and trends for site
management activities such as capacity analysis,
growth predictions, and energy management.
SiteScan makes full use of all features of its com-
puter-based central processor, including RS-232
communications and other output ports and
unlimited expansion via multiplexers. For critical
data processing facilities, the SiteScan system
offers total site management capability in a virtu-
ally obsolescence-proof configuration.

Physical/Electrical Data
10
PHYSICAL/ELECTRICAL DATA
Standard main input circuit breaker interrupting ratings are as follows. Other ratings available on request.
Table 2 Electrical and mechanical characteristics, 60 Hz
Size, kVA
Input
Volts
Output
Volts
Model
Number
Weight
lbs (kg)
Total
Output
Poles
(Standard)
Input
Full
Load
Amps
Main
Input
Circuit
Breaker
Dimensions
W x D x H
inches (mm)
15 kVA
(with transformer)
600V
480V
208V
208/120V
208/120V
208/120V
PPB015C
PPA015C
PPC015C
550 (250)
550 (250)
550 (250)
42
42
42
15
19
43
20
25
60
20 x 32 x 68
(508 x 813 x 1727)
(without transformer) 208/120V 208/120V PRC015 300 (136) 42 42 60
30 kVA
(with transformer)
600V
480V
208V
208/120V
208/120V
208/120V
PPB030C
PPA030C
PPC030C
700 (320)
700 (320)
700 (320)
42
42
42
30
38
87
40
50
110
20 x 32 x 68
(508 x 813 x 1727)
(without transformer) 208/120V 208/120V PRC030 300 (136) 42 83 110
50 kVA
(with transformer)
600V
480V
208V
208/120V
208/120V
208/120V
PP8050C
PPA050C
PPC050C
850 (380)
850 (380)
850 (380)
84
84
84
50
63
145
70
80
200
32 x 32 x 68
(813 x 813 x 1727)
(without transformer) 208/120V 208/120V PRC050 400 (175) 84 139 175
75 kVA
(with
transformer)
600V
480V
208V
208/120V
208/120V
208/120V
PPB075C
PPA075C
PPC075C
1050 (470)
1050 (470)
1050 (470)
84
84
84
74
93
215
100
125
300
32 x 32 x 68
(813 x 813 x 1727)
(without transformer) 208/120V 208/120V PRC075 400 (175) 84 208 300
100 kVA
(with transformer)
600V
480V
208V
208/120V
208/120V
208/120V
PPB100C
PPA100C
PPC100C
1275 (580)
1275 (580)
1275 (580)
84
84
84
99
124
286
125
175
400
32 x 32 x 68
(813 x 813 x 1727)
(without transformer) 208/120V 208/120V PRC100 450 (200) 84 277 350
125 kVA
(with transformer)
600V
480V
208V
208/120V
208/120V
208/120V
PPB125C
PPA125C
PPC125C
1450 (660)
1450 (660)
1450 (660)
84
84
84
124
155
358
175
200
450
32 x 32 x 68
(813 x 813 x 1727)
(without transformer) 208/120V 208/120V PRC125 450 (200) 84 347 450
150 kVA
(with transformer)
600V
480V
208V
208/120V
208/120V
208/120V
PPB150C
PPA150C
PPC150C
1750 (790)
1750 (790)
1750 (790)
126
126
126
148
185
427
200
250
600
44 x 32 x 68
(1118 x 813 x 1727)
(without transformer) 208/120V 208/120V PRC150 700 (320) 126 416 600
200 kVA
(with transformer) 600V
480V
208/120V
208/120V
PPB200C
PPA200C
2100 (950)
2100 (950)
126
126
197
247
250
350
44 x 32 x 68
(1118 x 813 x 1727)
225 kVA
(with transformer) 600V
480V
208/120V
208/120V
PPB225C
PPA225C
2250 (1020)
2250 (1020)
126
126
222
278
300
350
44 x 32 x 68
(1118 x 813 x 1727)
NOTES
1. All input and output ratings are three-phase.
2. Consult factory for voltages and applications not shown.
3. For extra panelboard option: 84 pole models are 32" (813 mm) wide; 126 pole models are 44" (1118 mm) wide; and 168 pole models are
62" (1575 mm) wide.
Input OPD 208V 480V 600V
Up to 250 Amps 65 kA 35 kA 22 kA
300 to 600 Amps 65 kA 35 kA 25 kA

Physical/Electrical Data
11
Standard main input circuit breaker interrupting ratings (rated symmetrical ultimate breaking capacity per
IEC 947-2) are as follows. Other ratings available upon request.
Table 3 Electrical and mechanical characteristics, 50 Hz
Size, kVA
Input
Volts
Output
Volts
Model
Number
Weight
lbs (kg)
Total
Output
Poles
(Standard)
Input
Full
Load
Amps
Main
Input
Circuit
Breaker
Dimensions
W x D xH
inches (mm)
15kVA
(with transformer)
415V
400V
380V
415/240V
400/230V
380/220V
PPG015G
PPU015U
PPF015F
600 (275)
600 (275)
600 (275)
42
42
42
22
23
24
30
30
30 20 x 32 x 68
(508 x 813 x 1727)
(without transformer) 415/240V
380/220V
415/240V
380/220V
PRG015
PRF015
300 (136)
300 (136)
42
42
21
23
30
30
30 kVA
(with transformer)
415V
400V
380V
415/240V
400/230V
380/220V
PPG030G
PPU030U
PPF030F
775 (350)
775 (350)
775 (350)
42
42
42
43
45
47
60
60
60 20 x 32 x 68
(508 x 813 x 1727)
(without transformer) 415/240V
380/220V
415/240V
380/220V
PRG030
PRF030
300 (136)
300 (136)
42
42
42
46
60
60
50 kVA
(with transformer)
415V
400V
380V
415/240V
400/230V
380/220V
PPG050G
PPU050U
PPF050F
925 (420)
925 (420)
925 (420)
84
84
84
72
75
79
100
100
100 32 x 32 x 68
(813 x 813 x 1727)
(without transformer) 415/240V
380/220V
415/240V
380/220V
PRGO50
PRF050
400 (175)
400 (175)
84
84
70
76
90
100
75 kVA
(with transformer)
415V
400V
380V
415/240V
400/230V
380/220V
PPG075G
PPU075U
PPF075F
1150 (520)
1150 (520)
1150 (520)
84
84
84
108
112
117
150
150
150 32 x 32 x 68
(813 x 813 x 1727)
(without transformer) 415/240V
380/220V
415/240V
380/220V
PRG075
PRF075
400 (175)
400 (175)
84
84
104
114
150
150
100 kVA
(with transformer)
415V
400V
380V
415/240V
400/230V
380/220V
PPG100G
PPU100U
PPF100F
1400 (630)
1400 (630)
1400 (630)
84
84
84
143
149
157
200
200
200 32 x 32 x 68
(813 x 813 x 1727)
(without transformer) 415/240V
380/220V
415/240V
280/220V
PRG100
PRF100
450 (200)
450 (200)
84
84
139
152
175
200
125 kVA
(with transformer)
415V
400V
380V
415/240V
400/230V
380/220V
PPG125G
PPU125U
PPF125F
1575 (710)
1575 (710)
1575 (710)
84
84
84
179
186
196
225
250
250 32 x 32 x 68
(813 x 813 x 1727)
(without transformer) 415/240V
380/220V
415/240V
380/220V
PRG125
PRF125
450 (200)
450 (200)
84
84
174
190
225
250
150 kVA
(with transformer)
415V
400V
380V
415/240V
400/230V
380/220V
PPG150G
PPU150U
PPF150F
1900 (860)
1900 (860)
1900 (860)
126
126
126
214
223
234
300
300
300 44 x 32 x 68
(1118 x 813 x 1727)
(without transformer) 415/240V
380/220V
415/240V
380/220V
PRG150
PRF150
700 (320)
700 (320)
126
126
209
228
300
300
200 kVA
(with transformer)
415V
400V
380V
415/240V
400/230V
380/220V
PRG200G
PPU200U
PPF200F
2300 (1045)
2300 (1045)
2300 (1045)
126
126
126
285
297
312
400
400
400
44 x 32 x 68
(1118 x 813 x 1727)
225 kVA
(with transformer)
415V
400V
380V
415/240V
400/230V
380/220V
PPG225G
PPU225U
PPF225F
2450 (1110)
2450 (1110)
2450 (1110)
126
126
126
321
334
351
450
450
450
44 x 32 x 68
(1118 x 813 x 1727)
NOTES
1. All input and output ratings are three-phase.
2. Consult Factory for voltages and applications not shown.
3. For extra panelboard option: 84 pole models are 32" (813 mm) wide; 126 pole models are 44" (1118 mm) wide; and 168 pole models are
62" (1575 mm) wide.
INPUT OPD 380-415V
Up to 110 Amps 15 kA
125 to 600 Amps 25 kA

Heat Output
12
Standard main input circuit breaker interrupting ratings are as follows. Other ratings available on request.
HEAT OUTPUT
Environmental Characteristics
Table 4 Electrical and mechanical characteristics, Top Exit
Size, kVA
Input
Volts
Output
Volts
Model
Number
Weight
lbs (kg)
Total
Output
Poles
(Standard)
Input
Full
Load
Amps
Main
Input
Circuit
Breaker
Dimensions
W x D x H
inches (mm)
15 kVA
600V
480V
208V
208/120V
208/120V
208/120V
PPB015C
PPA015C
PPC015C
600 (272)
600 (272)
600 (272)
42
42
42
15
19
43
20
25
60
32 x 32 x 68
(813 x 813 x 1727)
30 kVA
600V
480V
208V
208/120V
208/120V
208/120V
PPB030C
PPA030C
PPC030C
750 (340)
750 (340)
750 (340)
42
42
42
30
38
87
40
50
110
32 x 32 x 68
(813 x 813 x 1727)
50 kVA
600V
480V
208V
208/120V
208/120V
208/120V
PP8050C
PPA050C
PPC050C
900 (408)
900 (408)
900 (408)
84
84
84
50
63
145
70
80
200
44 x 32 x 68
(1118 x 813 x 1727)
75 kVA
600V
480V
208V
208/120V
208/120V
208/120V
PPB075C
PPA075C
PPC075C
1100 (499)
1100 (499)
1100 (499)
84
84
84
74
93
215
100
125
300
44 x 32 x 68
(1118 x 813 x 1727)
100 kVA
600V
480V
208V
208/120V
208/120V
208/120V
PPB100C
PPA100C
PPC100C
1325 (601)
1325 (601)
1325 (601)
84
84
84
99
124
286
125
175
400
44 x 32 x 68
(1118 x 813 x 1727)
125 kVA
600V
480V
208V
208/120V
208/120V
208/120V
PPB125C
PPA125C
PPC125C
1500 (680)
1500 (680)
1500 (680)
84
84
84
124
155
358
175
200
450
44 x 32 x 68
(1118 x 813 x 1727)
150 kVA
600V
480V
208V
208/120V
208/120V
208/120V
PPB150C
PPA150C
PPC150C
1750 (794)
1750 (794)
1750 (794)
84
84
84
148
185
427
200
250
600
44 x 32 x 68
(1118 x 813 x 1727)
200 kVA 600V
480V
208/120V
208/120V
PPB200C
PPA200C
2100 (958)
2100 (958)
84
84
197
247
250
350
44 x 32 x 68
(1118 x 813 x 1727)
225 kVA 600V
480V
208/120V
208/120V
PPB225C
PPA225C
2250 (1021)
2250 (1021)
84
84
222
278
200
250
44 x 32 x 68
(1118 x 813 x 1727)
NOTES
1. All input and output ratings are three-phase.
2. Consult factory for voltages and applications not shown.
3. For extra panelboard option: 84 pole models are 44" (1118 mm) wide; and 126 pole models are 62" (1575 mm) wide.
Input OPD 208V 480V 600V
Up to 250 Amps 65 kA 35 kA 22 kA
300 to 600 Amps 65 kA 35 kA 25 kA
Table 5 Heat output
kVA 1/2 Load BTU/hr (kW) 3/4 Load BTU/hr (kW) Full Load BTU/hr (kW)
15 1300 (.38) 1900 (.57) 2500 (.73)
30 2200 (.64) 3400 (1.00) 4600 (1.35)
50 3100 (.91) 4650 (1.36) 6200 (1.82)
75 4100 (1.20) 6150 (1.80) 8150 (2.39)
100 5050 (1.48) 7700 (2.26) 9900 (2.90)
125 5800 (1.70) 8700 (2.55) 11500 (3.37)
150 6300 (1.85) 9400 (2.75) 12500 (3.66)
200 7700 (2.26) 11500 (3.37) 15500 (4.54)
225 7800 (2.29) 11800 (3.46) 15800 (4.63)
Temperature, operating: 0°C to +40°C
Temperature, storage: 55°C to + 85°C
Relative humidity: 0% to 95% (non-condensing)

System Sizing
13
SYSTEM SIZING
Sizing a power center to meet present and future
needs is a fundamental requirement.
Present Requirements
Estimating the present system size in kilovolt
amperes (kVA) is done in a number of ways. Typical
sources include computer site planning manuals,
equipment nameplate data, and electrical service
data. kVA requirements are estimated using any of
the following formulas:
1. Power profile of equipment. (This is the most
reliable base from which to estimate present
kVA loading.)
For three-phase systems:
For single-phase equipment:
2. Kilowatts (kW) and Power Factor (pf).
(If pf is not given, assume 0.8.)
3. Ampere specifications for the electrical
service feeding the site:
(for three-phase systems)
4. BTU/hr or Kcal/hr specifications:
(If pf is not known, assume 0.8.)
After the present kVA requirement has been deter-
mined, the anticipated growth and the special char-
acteristics of the load must be considered.
Growth Requirements
The power center should be sized to anticipate
growth. Growth rates associated with data process-
ing centers double power requirements in a short
time. Therefore it is reasonable to size the system for
twice the present kVA load. Even in a minimum
growth environment, the power center should be
sized for 125% of the estimated kVA load.
Special Load Characteristics
For special load characteristics, factory application
engineers should be consulted for recommended sys-
tem sizing.
System Grounding Considerations
The grounding of any power conditioning system is
critical to its performance. The National Electrical
Code provides for a safe electrical system. The
ground path required by the NEC for safety should
be enhanced or improved for system performance,
never defeated or eliminated. For detailed system
grounding considerations, refer to the Precision
Power Center Installation Operation and
Mainenance Manual.
V = volts pf = power factor
A = amperes • = “multiplied by”
kVA = kilovolt-amperes BTU/hr = British Ther-
mal Units per hour (heat
output)
kW = kilowatts Kcal/hr = kilocalories per
hour (heat output)
kVA V A 1.73()⋅⋅
1000
---------------------
=
AkVA 1000⋅
V1.73()⋅
-----------------
=
kVA VA⋅
1000
--------
=
AkVA 1000⋅
V
-----------------
=
kVA kW
pf
-----
=
kVA V A 1.73()⋅⋅
1000
---------------------
=
kVA kW
pf
-----
=
kW BTU hr()⁄
3413
----------------
=kcal hr()⁄
860
---------------
=

Service Access and Clearance Requirements
14
SERVICE ACCESS AND CLEARANCE REQUIREMENTS
Precision Power Centers are designed for easy servic-
ing. Access areas and minimum clearances of each
are described below.
Precision Power Center - 15-225 kVA sizes
Recommended minimum service clearances for Preci-
sion Power Centers should be at the front and one
other side, or rear. Service clearance extends 42 in.
(1067 mm) from the unit in accordance with the
National Electrical Code. If bottom cable exit is
desired, there must be at least 6" (143 mm) clearance
at the bottom of the unit.
(NOTE: If bottom cable exit or distribution cables are
used, the unit must be installed on a raised floor or
floor pedestals must be provided. Non-raised floor
applications are not CSA approved.)
Units with a transformer require 18" (427 mm) above
the unit for cooling airflow.
Figure 7 Dimensions, clearances, 1 panelboard
Figure 8 Dimensions, clearances, 2 panelboards
6" ***
(152mm) 42" **
(1067mm)
68"
(1727mm)
20"
(507mm) 32"
(813mm) 18" *
(457mm)
6" ***
(152 mm)
18" *
(457mm)
32"
(813mm)
* 16For units with transformer
** Required in front of unit plus
on one other side or in back
*** For bottom cable exit
32"
(813mm)
68"
(1727mm)
42" **
(1067 mm)

Service Access and Clearance Requirements
15
Figure 9 Dimensions, clearances, 3 panelboards
18" (457mm)
For units with
transformer
6" (152mm)
For bottom cable exit
68"
(1727 mm)
42" (1067 mm)
Required in front of
unit plus on one other
side or in back
32"
(813mm)
44"
(1118mm)

Service Access and Clearance Requirements
16
Figure 10 Dimensions, clearances, 4 panelboards
18" (457mm)
For units with transformer
6" (152mm)
For bottom cable exit
68"
(1727 mm)
42" (1067 mm)
Required in front of unit plus
on one other side or in back
Note: Units are 32"
(813mm) deep
62"
(1575mm)