liebert Precision Power Center TECHNICAL DATA MANUAL

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