POWER CONVERSION/DISTRIBUTION
Precision Power Center
TECHNICAL DATA MANUAL
Three Phase
15-225 kVA
50 & 60 Hz
Table of Contents
NO-COMPROMISE POWER DISTRIBUTION AT LOWER INSTALLED COST . . . . . . . . . . . . . . . . . . . . . .1
LIEBERT PACKAGED POWER SYSTEM ADVANTAGES COMPARED TO CONVENTIONAL,
BUILT-UP SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .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
Table s
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
i
ii
No-Compromise Power Distribution at Lower Installed Cost
NO-COMPROMISE POWER DISTRIBUTION AT LOWER INSTALLED COST
Liebert Precision Power Centers offer distribution, computer-grade grounding, and monitoring. Unlike conventional 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
Power Panels with Rigid
Conduit Distribution
Input
Circuit
Breaker
Output
Circuit
Breaker
4-wire
208/120V
Isolation Transformer
REPO
Figure 2 Liebert Precision Power Center
Power Panels with Flexible
Interconnecting Cables
Circuit
Breaker
Power J-Box
Figure 3 Liebert Precision Power Center—Top Exit
Top Exit Precision
Power Center
REPO
Control
J-Box
REPO
Circuit
Breaker
1
Liebert Packaged Power System Advantages Compared to Conventional, Built-Up Systems
LIEBERT PACKAGED POWER SYSTEM ADVANTAGES COMPARED TO CONVENTIONAL,
UILT-UP SYSTEMS
B
Desirable Features Conventional Built-Up Systems Liebert Packaged Power System
Proven System
Design
Agency Approved
Factory Tested
Power Quality
Improvement
Computer-Grade
Grounding
Secure Distribution
Circuit Identification
Monitoring
Ease of Installation
Easy System
Expansion
Easy System
Rearrangement
Easy To Move
No. Each site is a one-of-a-kind installation.
“Design” depends on engineer and installer.
Not as a system. Even though listed
components may be used, site-fabricated
distribution is subject to acceptance by local
inspecting authorities.
No. Testing of performance is done at the site,
if at all.
Doubtful. Because of the variables in design
and installation, site-fabricated distribution
does not consistently offer computer-grade
power isolation or ground systems.
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.
Possibly. Only if the entire distribution panel is
dedicated to the computer and the panel is in
the computer room.
Possibly. Circuit number and receptacle
references might be supplied, depending on
the installing electrician and available
information.
Seldom. Some add-on monitoring systems are
available, but monitoring also depends on the
installing electrician and available information.
No. All site-fabricated distribution wiring
becomes part of premises wiring.
No. Conduit installation and wire pulling is timeconsuming, and can hamper operations while
in progress.
No. Site-fabricated distribution cannot be easily
rearranged. Old conduit and wiring must be
removed and new installed.
No. New distribution must be built at the new
site and old conduit and wiring usually must be
removed from the former site.
Yes. Liebert power systems are complete,
proven-design, factory tested to ensure
consistent performance. Designed-in
distribution flexibility accommodates all
installation sites.
Yes. UL listing as a complete system is an
assurance of safety.
Yes. Factory testing the complete system
ensures performance and safety of the system.
Yes. Because packaged power systems have
shielded isolation transformers close to the
load, they offer power line noise attenuation
and controlled grounding.
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.
Yes. Power distribution panel is in the
computer room. Access is limited to authorized
personnel.
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.
Yes. Built-in power parameter monitoring,
alarm, and control capabilities are standard in
packaged power systems.
Yes. A packaged system requires only a single
connection to the premises wiring.
Yes. New cable(s) can be routed quickly with
minimal disruption.
Yes. Even after major equipment
rearrangement, redistributing power from
packaged systems becomes a simple matter of
re-routing the flexible interconnecting cables.
Yes. The package is easily moved with the
computer system to the new site.
2
Capacities and Configurations
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 distribution 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 panelboards 50-125 kVA, 2 panelboards
3
Figure 5 Top Exit Precision Power Center, 1-2 panelboards
Capacities and Configurations
15-30 kVA, 1 panelboard
Figure 6 Precision Power Center diagram
Shielded
Isolation
Transformer
High
Vol tag e
J-Box
Arrester
Low
Vol tag e
J-Box
Input
Circuit
Breaker
Surge
Monitoring
Control
Remote
Monitoring
System
Single Point
Ground
and
Spike
Suppression
Module
Display
50-225 kVA, 2 panelboards
Main
Circuit
Breaker
Main
Circuit
Breaker
Subfeed
Output
Breaker
Local
Output
Panelboard
Output
Panelboard
4
Standard Features for All Systems
STANDARD FEATURES FOR ALL SYSTEMS
Shielded Isolation Transformer Temperature Sensors Input Circuit Breaker
All Liebert distribution and conditioning systems
incorporate standard features that ensure load protection 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 fullload 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 internal 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-magnetic 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 sensor, local Emergency Power Off switch, and Manual
Restart circuit.
The local Emergency Power Off (EPO) switch is an
illuminated push button, easily accessible for emergency 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 isolates 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 conditioner 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 maximum accessibility to the interior. For safety and
security, any panels that provide access to high voltage require a tool for removal.
Panelboards
One 42-pole panelboard is provided on 15 and
30 kVA Precision Power Centers. Two 42-pole panelboards (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 provided on 150 through 225 kVA Precision Power Centers. (The three-panelboard configuration is not
available on Top Exit units.) Each panelboard is
enclosed for safety and has individual isolated neutral 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 panelboard(s).
Output circuits are protected by single-, two-, or
three-pole thermal-magnetic molded-case branch circuit breakers sized specifically for the load to be
served. (Standard panelboards use plug-in breakers.)
5
ADDITIONAL FEATURES FOR ALL SYSTEMS
Additional Features for All Systems
Flexible Output Cables and Terminations
A flexible output cable
system is available for
Precision Power Centers.
Insulated cable conductors are protected by jacketed, liquid-tight, flexible
steel conduit with an integral copper shielding conductor. Each output cable
is fabricated to the specified length and type of termination 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 equipment 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-panelboard 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 Company.
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 terminals for connecting the
incoming power line and
ground conductors. A
10-foot (3 m) flexible cable
is furnished for connection 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 terminals 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 connection between the junction box and the power conditioning system.
Secondary Class Surge Arrester
A secondary class surge
arrester using high capacity utility-grade metal
oxide resistors is wired to
all three phases of the
input power to shunt voltage surges to building
ground. The arrester is
rated for a maximum
FOW spark-over of 3200 volts with maximum discharge 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.
6
Additional Features for All Systems
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 conditioning systems. If step-down and isolation are not necessary, 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 button 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 provide space for the bottom
entrance/exit of cables in Precision 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-squaremeter plate mounted to (and bonded to) the highvoltage junction box. It reduces the effects of transients on the ground system by providing a capacitive 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
42 poles
Panelboards
Flexible Output Cables and
Terminations
Additional Pole Capacity
Optional Panelboard Types Optional Optional Optional Optional Optional
Subfeed Output Circuit
Breaker
High-Voltage Junction Box
with Flexible Input Cable
Low-Voltage Junction Box
with Flexible Input Cable
Secondary Class Surge
Arrester
Spike Suppression Module Optional Optional Optional Optional Optional
Transformerless System Optional Not available Optional Not available Optional
Remote Emergency Power
Off (REPO) Switch
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
standard
(one 42-pole
panelboard)
Available Available Available Available Available
Optional 84
poles
Not available Not available
Standard Not available Standard Not available Standard
Optional Not available Optional Not available Optional
Optional Optional Optional Optional Optional
Optional Optional Optional Optional Optional
Top Exit
15-30 kVA
42 poles
standard
(one 42-pole
panelboard)
Optional 84
poles
PPC
50-125 kVA
84 poles
standard
(two 42-pole
panelboards)
Optional 126 or
168 poles
Optional
(up to 225 A)
Top Exit
50-150 kVA
84 poles
standard
(two 42-pole
panelboards)
Optional 126
poles
Not available
150-225 kVA
126 poles
standard
(three 42-pole
panelboards)
Optional 168 or
210 poles
Optional
(up to 400 A)
PPC
7
HARMONICS SOLUTIONS
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 distribution 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 currents and are designed to tolerate neutral currents
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 secondary windings that are phase shifted provide cancellation of the load’s non-triplen harmonic currents.
up to 1.73 times full load. When severe levels of harmonic currents are anticipated, several additional
power center features are available.
With K-Factor
Features Comparison Basic System
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
Transformer
With Multi-Winding
Transformer
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 connecting 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 provides 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
8
System Monitoring
The monitor panel also provides warning of out-ofspec conditions through audible alarm and displayed
alarm messages. All alarmed conditions are retained
in a non-volatile memory until reset. Alarm thresholds 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 conditions to a Liebert SiteScan central monitoring system.
An isolated RS-232 ASCII communication port is provided for communication to other monitoring systems.
Remote Monitoring Systems
SiteScan
SiteScan is an on-line center for monitoring and controlling all support systems in a large data processing installation. SiteScan provides early warning
alarms and total site management data. A softwarebased system using a microcomputer as the central
processing center, SiteScan is programmable, menudriven, and upgradeable.
Basic Temperature Monitoring Panel
The Transformer Overtemperature alarm indicator
is a part of the 180°C transformer temperature sensing circuit. This configuration is optional on all units.
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 flexibility 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 realtime 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 computer-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 virtually obsolescence-proof configuration.
9
Physical/Electrical Data
PHYSICAL/ELECTRICAL DATA
Table 2 Electrical and mechanical characteristics, 60 Hz
Total
Output
Input
Size, kVA
15 kVA
(with transformer)
(without transformer) 208/120V 208/120V PRC015 300 (136) 42 42 60
30 kVA
(with transformer)
(without transformer) 208/120V 208/120V PRC030 300 (136) 42 83 110
50 kVA
(with transformer)
(without transformer) 208/120V 208/120V PRC050 400 (175) 84 139 175
75 kVA
(with
transformer)
(without transformer) 208/120V 208/120V PRC075 400 (175) 84 208 300
100 kVA
(with transformer)
(without transformer) 208/120V 208/120V PRC100 450 (200) 84 277 350
125 kVA
(with transformer)
(without transformer) 208/120V 208/120V PRC125 450 (200) 84 347 450
150 kVA
(with transformer)
(without transformer) 208/120V 208/120V PRC150 700 (320) 126 416 600
200 kVA
(with transformer)
225 kVA
(with transformer)
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.
Volts
600V
480V
208V
600V
480V
208V
600V
480V
208V
600V
480V
208V
600V
480V
208V
600V
480V
208V
600V
480V
208V
600V
480V
600V
480V
Output
Volts
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
Model
Number
PPB015C
PPA015C
PPC015C
PPB030C
PPA030C
PPC030C
PP8050C
PPA050C
PPC050C
PPB075C
PPA075C
PPC075C
PPB100C
PPA100C
PPC100C
PPB125C
PPA125C
PPC125C
PPB150C
PPA150C
PPC150C
PPB200C
PPA200C
PPB225C
PPA225C
Weight
lbs (kg)
550 (250)
550 (250)
550 (250)
700 (320)
700 (320)
700 (320)
850 (380)
850 (380)
850 (380)
1050 (470)
1050 (470)
1050 (470)
1275 (580)
1275 (580)
1275 (580)
1450 (660)
1450 (660)
1450 (660)
1750 (790)
1750 (790)
1750 (790)
2100 (950)
2100 (950)
2250 (1020)
2250 (1020)
Poles
(Standard)
42
42
42
42
42
42
84
84
84
84
84
84
84
84
84
84
84
84
126
126
126
126
126
126
126
Input
Full
Load
Amps
15
19
43
30
38
87
50
63
145
74
93
215
99
124
286
124
155
358
148
185
427
197
247
222
278
Main
Input
Circuit
Breaker
20
25
60
40
50
110
70
80
200
100
125
300
125
175
400
175
200
450
200
250
600
250
350
300
350
Dimensions
W x D x H
inches (mm)
20 x 32 x 68
(508 x 813 x 1727)
20 x 32 x 68
(508 x 813 x 1727)
32 x 32 x 68
(813 x 813 x 1727)
32 x 32 x 68
(813 x 813 x 1727)
32 x 32 x 68
(813 x 813 x 1727)
32 x 32 x 68
(813 x 813 x 1727)
44 x 32 x 68
(1118 x 813 x 1727)
44 x 32 x 68
(1118 x 813 x 1727)
44 x 32 x 68
(1118 x 813 x 1727)
Standard main input circuit breaker interrupting ratings are as follows. Other ratings available on request.
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
10
Physical/Electrical Data
Table 3 Electrical and mechanical characteristics, 50 Hz
Total
Output
Size, kVA
Input
Volts
Output
Volts
Model
Number
Weight
lbs (kg)
Poles
(Standard)
15kVA
(with transformer)
(without transformer)
415V
400V
380V
415/240V
380/220V
415/240V
400/230V
380/220V
415/240V
380/220V
PPG015G
PPU015U
PPF015F
PRG015
PRF015
600 (275)
600 (275)
600 (275)
300 (136)
300 (136)
42
42
42
42
42
30 kVA
(with transformer)
(without transformer)
415V
400V
380V
415/240V
380/220V
415/240V
400/230V
380/220V
415/240V
380/220V
PPG030G
PPU030U
PPF030F
PRG030
PRF030
775 (350)
775 (350)
775 (350)
300 (136)
300 (136)
42
42
42
42
42
50 kVA
(with transformer)
(without transformer)
415V
400V
380V
415/240V
380/220V
415/240V
400/230V
380/220V
415/240V
380/220V
PPG050G
PPU050U
PPF050F
PRGO50
PRF050
925 (420)
925 (420)
925 (420)
400 (175)
400 (175)
84
84
84
84
84
75 kVA
(with transformer)
(without transformer)
415V
400V
380V
415/240V
380/220V
415/240V
400/230V
380/220V
415/240V
380/220V
PPG075G
PPU075U
PPF075F
PRG075
PRF075
1150 (520)
1150 (520)
1150 (520)
400 (175)
400 (175)
84
84
84
84
84
100 kVA
(with transformer)
(without transformer)
415V
400V
380V
415/240V
380/220V
415/240V
400/230V
380/220V
415/240V
280/220V
PPG100G
PPU100U
PPF100F
PRG100
PRF100
1400 (630)
1400 (630)
1400 (630)
450 (200)
450 (200)
84
84
84
84
84
125 kVA
(with transformer)
(without transformer)
415V
400V
380V
415/240V
380/220V
415/240V
400/230V
380/220V
415/240V
380/220V
PPG125G
PPU125U
PPF125F
PRG125
PRF125
1575 (710)
1575 (710)
1575 (710)
450 (200)
450 (200)
84
84
84
84
84
150 kVA
(with transformer)
(without transformer)
415V
400V
380V
415/240V
380/220V
415/240V
400/230V
380/220V
415/240V
380/220V
PPG150G
PPU150U
PPF150F
PRG150
PRF150
1900 (860)
1900 (860)
1900 (860)
700 (320)
700 (320)
126
126
126
126
126
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
225 kVA
(with transformer)
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.
415V
400V
380V
415/240V
400/230V
380/220V
PPG225G
PPU225U
PPF225F
2450 (1110)
2450 (1110)
2450 (1110)
126
126
126
Input
Full
Load
Amps
22
23
24
21
23
43
45
47
42
46
72
75
79
70
76
108
112
117
104
114
143
149
157
139
152
179
186
196
174
190
214
223
234
209
228
285
297
312
321
334
351
Main
Input
Circuit
Breaker
30
30
30
30
30
60
60
60
60
60
100
100
100
90
100
150
150
150
150
150
200
200
200
175
200
225
250
250
225
250
300
300
300
300
300
400
400
400
450
450
450
Dimensions
W x D xH
inches (mm)
20 x 32 x 68
(508 x 813 x 1727)
20 x 32 x 68
(508 x 813 x 1727)
32 x 32 x 68
(813 x 813 x 1727)
32 x 32 x 68
(813 x 813 x 1727)
32 x 32 x 68
(813 x 813 x 1727)
32 x 32 x 68
(813 x 813 x 1727)
44 x 32 x 68
(1118 x 813 x 1727)
44 x 32 x 68
(1118 x 813 x 1727)
44 x 32 x 68
(1118 x 813 x 1727)
Standard main input circuit breaker interrupting ratings (rated symmetrical ultimate breaking capacity per
IEC 947-2) are as follows. Other ratings available upon request.
INPUT OPD 380-415V
Up to 110 Amps 15 kA
125 to 600 Amps 25 kA
11
Heat Output
Table 4 Electrical and mechanical characteristics, Top Exit
Total
Input
Size, kVA
15 kVA
30 kVA
50 kVA
75 kVA
100 kVA
125 kVA
150 kVA
200 kVA
225 kVA
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.
Volts
600V
480V
208V
600V
480V
208V
600V
480V
208V
600V
480V
208V
600V
480V
208V
600V
480V
208V
600V
480V
208V
600V
480V
600V
480V
Output
Volts
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
208/120V
Model
Number
PPB015C
PPA015C
PPC015C
PPB030C
PPA030C
PPC030C
PP8050C
PPA050C
PPC050C
PPB075C
PPA075C
PPC075C
PPB100C
PPA100C
PPC100C
PPB125C
PPA125C
PPC125C
PPB150C
PPA150C
PPC150C
PPB200C
PPA200C
PPB225C
PPA225C
Weight
lbs (kg)
600 (272)
600 (272)
600 (272)
750 (340)
750 (340)
750 (340)
900 (408)
900 (408)
900 (408)
1100 (499)
1100 (499)
1100 (499)
1325 (601)
1325 (601)
1325 (601)
1500 (680)
1500 (680)
1500 (680)
1750 (794)
1750 (794)
1750 (794)
2100 (958)
2100 (958)
2250 (1021)
2250 (1021)
Output
Poles
(Standard)
42
42
42
42
42
42
84
84
84
84
84
84
84
84
84
84
84
84
84
84
84
84
84
84
84
Input
Full
Load
Amps
15
19
43
30
38
87
50
63
145
74
93
215
99
124
286
124
155
358
148
185
427
197
247
222
278
Main
Input
Circuit
Breaker
20
25
60
40
50
110
70
80
200
100
125
300
125
175
400
175
200
450
200
250
600
250
350
200
250
Dimensions
W x D x H
inches (mm)
32 x 32 x 68
(813 x 813 x 1727)
32 x 32 x 68
(813 x 813 x 1727)
44 x 32 x 68
(1118 x 813 x 1727)
44 x 32 x 68
(1118 x 813 x 1727)
44 x 32 x 68
(1118 x 813 x 1727)
44 x 32 x 68
(1118 x 813 x 1727)
44 x 32 x 68
(1118 x 813 x 1727)
44 x 32 x 68
(1118 x 813 x 1727)
44 x 32 x 68
(1118 x 813 x 1727)
Standard main input circuit breaker interrupting ratings are as follows. Other ratings available on request.
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
HEAT OUTPUT
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)
Environmental Characteristics
Temperature, operating: 0°C to +40°C
Temperature, storage: 55°C to + 85°C
Relative humidity: 0% to 95% (non-condensing)
12
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:
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)
1. Power profile of equipment. (This is the most
reliable base from which to estimate present
kVA loading.)
For three-phase systems:
V A 1.73()⋅⋅
kVA
---------------------
=
kVA 1000⋅
-----------------
A
=
V1.73()⋅
1000
System Sizing
Growth Requirements
The power center should be sized to anticipate
growth. Growth rates associated with data processing 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 system 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.
For single-phase equipment:
VA⋅
kVA
A
--------
=
kVA 1000⋅
-----------------
=
1000
V
2. Kilowatts (kW) and Power Factor (pf).
kW
kVA
-----
=
pf
(If pf is not given, assume 0.8.)
3. Ampere specifications for the electrical
service feeding the site:
V A 1.73()⋅⋅
kVA
---------------------
=
1000
(for three-phase systems)
4. BTU/hr or Kcal/hr specifications:
kW
BTU hr()⁄
----------------
=
3413
kVA
=
kW
-----
=
pf
kcal hr()⁄
---------------
860
(If pf is not known, assume 0.8.)
After the present kVA requirement has been determined, the anticipated growth and the special characteristics of the load must be considered.
13
SERVICE ACCESS AND CLEARANCE REQUIREMENTS
Precision Power Centers are designed for easy servicing. Access areas and minimum clearances of each
are described below.
Precision Power Center - 15-225 kVA sizes
Recommended minimum service clearances for Precision 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
18" *
(457mm)
68"
(1727mm)
Service Access and Clearance Requirements
32"
(813mm)
32"
(813mm)
20"
(507mm)
32"
(813mm)
18" *
(457mm)
68"
(1727mm)
42" **
(1067 mm)
* 16For units with transformer
** Required in front of unit plus
on one other side or in back
*** For bottom cable exit
6" ***
(152 mm)
6" ***
(152mm)
42" **
(1067mm)
14
Figure 9 Dimensions, clearances, 3 panelboards
Service Access and Clearance Requirements
18" (457mm)
For units with
transformer
68"
(1727 mm)
32"
(813mm)
44"
(1118mm)
42" (1067 mm)
Required in front of
unit plus on one other
side or in back
15
6" (152mm)
For bottom cable exit
Figure 10 Dimensions, clearances, 4 panelboards
Service Access and Clearance Requirements
62"
(1575mm)
18" (457mm)
For units with transformer
Note: Units are 32"
(813mm) deep
68"
(1727 mm)
42" (1067 mm)
Required in front of unit plus
on one other side or in back
16
6" (152mm)
For bottom cable exit
Figure 11 Dimensions, clearances, Top Exit unit
44" (1118mm) for
2 panelboards
32" (813mm) for
1 panelboard
or
Service Access and Clearance Requirements
32"
(813mm)
68"
(1727 mm)
42" (1067 mm)
Required in front of unit plus
on one other side or in back
Allow 36" (914 mm) minimum
clearance on both sides or in
rear for cooling air flow
17
Service Access and Clearance Requirements
18
POWER CONVERSION/DISTRIBUTION
Precision Power Center
TECHNICAL DATA MANUAL
The Company Behind the Products
With over a million installations around the globe,
Liebert is the world leader in computer protection
systems. Since its founding in 1965, Liebert has
developed a complete range of support and
protection systems for sensitive electronics:
• Environmental systems—close-control air
conditioning from 1 to 60 tons
• Power conditioning and UPS with power
ranges from 300 VA to more than 1000 kVA
• Integrated systems that provide both
environmental and power protection in a
single, flexible package
• Monitoring and control—from systems of any
size or location, on-site or remote
• Service and support through more than 100
service centers around the world and a 24/7
Customer Response Center
While every precaution has been taken to ensure
the accuracy and completeness of this literature,
Liebert Corporation assumes no responsibility and
disclaims all liability for damages resulting from
use of this information or for any errors or
omissions.
© 2002 Liebert Corporation
All rights reserved throughout the world.
Specifications subject to change without notice.
® Liebert and the Liebert logo are registered
trademarks of Liebert Corporation. All names
referred to are trademarks or registered
trademarks of their respective owners.
Technical Support
United States
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
Single-Phase UPS
800-222-5877
Outside the United States
614-841-6598
3-Phase UPS
800-543-2378
Environmental Control
800-543-2778
Italy
Via Leonardo Da Vinci 8
Zona Industriale Tognana
35028 Piove Di Sacco (PD)
+39 049 9719 111
FAX: +39 049 5841 257
Asia
23F, Allied Kajima Bldg.
138 Gloucester Road
Wanchai
Hong Kong
+852 2 572 2201
FAX: +852 2 831 0114
Web Site
www.liebert.com
SL-20045 (6/02)
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