CONSTRUCTION
Basic UPS Topology On-Line On-Line
Inverter Provides 100% load Provides 100% load
power 100% of time power 100% of time
Converter Provides 100% load Provides 100% load
power to inverter power to inverter
Bypass Switch Solid State Static OPTIONAL Dynamic Liebert has to be
Switch transfers (Relay) Switch severely derated
output between transfers output for the most
inverter and input between inverter commonly used
utility and input utility, electrical
NOT for all services
input/output
electrical services
Isolation Circuits 5 kHz low pass Transformer EPC has increased
filter efficiency and
smaller transients
with smaller,
lighter, and less
expensive hardware
Internal Batteries Included Included
OUTPUT ELECTRICAL RATINGS
Rated power, kVA @ 250 V 6.0 @ 240 V EPC provides much
6.0 @ 120/208 V 5.2 @ 120/208 V more power
Rated power, kW 4 4
Phase rated current, 25 25 @ 240 V
A, rms
Phase rated current, 75 75
A peak
Neutral rated 33, for 2-phase Not applicable EPC can provide
current, A output full power on
2-phase output
Nominal voltages, V Single Phase: 200; Single phase: 220; EPC has universal,
208; 220; 230; 240; 230; 240; with worldwide output
250; modifications Dual voltages, without
Dual Phase: 100/200; Phase: 100/200; field
120/208; 120/240 120/208; 120/240 modifications
Number of phases 1 or 2 1 or 2
Allowed phase 120; 180; 240 120, 180, no
displacements, reference to 240
degrees
Nominal frequencies, 50 or 60 50 or 60
Hz
INPUT FOR ELECTRIC UTILITY
Nominal voltages, V Single Phase: 200; Single Phase, only EPC can be powered
208; 220; 230; 240; 208, 240 from
250; 100/200-120/208 or
Dual Phase: 100/200; 240 V electrical
120/208; 120/240 services. Does not
Same as on the need an extra
output transformer in the
external
maintenance bypass
circuit
Number of phases 1 or 2, Same as 1 EPC in a 2-phase
output circuit can draw
more power from
the same rated
input service
Allowed phase 120; 180; 240 Not applicable
displacements,
degrees
Maximum nominal phase 20 20, cord rated 30 A EPC does not need
current, A rms a higher current
rated electrical
service
Maximum nominal 20 Not applicable EPC does not
neutral current, A require an
rms oversized neutral
conductor
Overcurrent 25 No reference
protection rating, A
Frequency range, Hz 45 - 66 45-65
POWER CONDITIONING PERFORMANCE: Voltages between power carrying
conductors
OVER and UNDER VOLTAGES
Input voltage range 100 - 275 V 170 - 264 V EPC can operate at
the extreme high
and low voltages
required for
worldwide
compatibility
Output voltage +/- 0.3% +/-2% EPC controls to a
regulation finer tolerance
using Digital
Signal Processors
(DSPs)
FREQUENCY DISTURBANCES
Input frequency range +/- 5 to 6 Hz +/- 5Hz
Output frequency Selectable from +/-1 Selectable from
range to 3 Hz +/-0.1 to 5 Hz
Output 1 Hz/sec standard, 1 Hz/sec standard,
synchronization speed programmable programmable
(slew rate)
ELECTRICAL NOISE IMMUNITY
For Input noise 10 VRMS No reference
amplitude and
Input noise frequency 5 kHz - 30 MHz No reference
range
Output noise 0.5 VRMS No reference EPC meets Hewlett
amplitude Packard computer
specifications
In any UPS the attenuation is limited to less than 15 dB between input and output
unshielded power cords in frequency range 450 kHz - 30 MHz
ELECTRICAL SURGE IMMUNITY
Input 0.5 us-100 kHz Output voltage No reference
Ring Wave with change less than 1%
amplitude 6 kV, 0.5 of nominal
kA capacity
Input 1.2/50 us-8/20 Output voltage No reference
us Combination Wave change less than 1%
with amplitude 6 kV of nominal
and 3 kA capacity,
any polarity
Input 5/50 ns Fast Output voltage No reference
Transient Burst with change less than 1%
peak voltage of 4 kV, of nominal
any polarity
Input 10/1000 us Wave Output voltage No reference
with amplitude 780 V change less than 1%
and 3 kA capacity, of nominal
any polarity
Input 5 kHz Ring Wave Output voltage No reference
with amplitude 950 V change less than 1%
and 2 kA capacity of nominal
ELECTROSTATIC DISCHARGE IMMUNITY
Input test voltage 15 Output voltage No reference
kV per IEC 801-2 change less than 1%
of nominal
ELECTROMAGNETIC FIELD IMMUNITY
Field strength 10V/m Output voltage No reference
per IEC 1000-4-3 change less than 1%
of nominal
ELECTRICAL ISOLATION PERFORMANCE: Voltages between power carrying
conductors and ground
ELECTRICAL NOISE IMMUNITY
For Input noise 10 VRMS No reference
amplitude and
Input noise frequency 5 kHz - 30 MHz No reference
range
Output noise 0.5 VRMS No reference EPC meets Hewlett
amplitude Packard computer
specifications
In any UPS the attenuation is limited to less than 15 dB between input and output
unshielded power cords in frequency range 450 kHz - 30 MHz
ELECTRICAL SURGE IMMUNITY: Neutral conductor is grounded at the service
entrance (USA, Canada, etc.)
Input 0.5 us-100 kHz Output voltage No reference
Ring Wave with change less than 1%
amplitude 3 kV, 0.1 of nominal
kA capacity
ELECTRICAL SURGE IMMUNITY: Neutral conductor is NOT grounded at the service
entrance
Input 0.5 us-100 kHz Output voltage No reference
Ring Wave with change less than 1%
amplitude 3 kV, 0.5 of nominal
kA capacity
Input 1.2/50 us-8/20 Output voltage No reference
us Combination Wave change 30 V peak,
with amplitude 6 kV 0.6 V/usec
and 3 kA capacity at
270 degrees
BATTERY BACKUP PERFORMANCE
Transient output Output voltage No reference
voltage amplitude change less than 1%
during transfer from of nominal
input AC source to
the battery, AC to
DC, %
Duration of output None No reference
voltage transient, AC
to DC, in
milliseconds
Transient output Output voltage No reference
voltage amplitude change less than 1%
during transfer from of nominal
the battery to the
input source, DC to
AC, %
Duration of output None No reference
voltage transient, DC
to AC, in
milliseconds
Internal battery 7-12 10 Under the same
reserve time at full conditions
load, min
Internal battery 20 - 30 25 Under the same
reserve time at half conditions
load, min
Number of optional 2 No reference EPC provides
battery sets extended backup
times for long
power failures
Connector for a user Standard No reference
supplied battery
Recharge time for an 2 hrs. to 100% 2 hrs to 95% EPC's fast
internal battery to recharge makes
nominal reserve time, available backup
hours for multiple power
failures in short
time frames
Recharge time to 2.5 hrs. to 100% Not available EPC does not
nominal reserve time require a separate
for optional battery charger
sets, hours
Maximum recharge 5 No reference EPC's high current
current for user makes recharge
battery, A faster
Float voltage None No reference Absence of float
voltage extends
battery life by
1-2 years
LOAD INTERACTION PERFORMANCE
LOADS Linear load power
factor range:
Capacitive-Resistive From -0 to 1 -.5 to 1 EPC does not need
derating for
capacitive loads
Inductive-Resistive From +0 to 1 +0.5 to 1 EPC does not need
derating for
inductive loads
Non-linear load crest ANY 3
factor
PERFORMANCE
Output voltage total 5 5
harmonic distortion
(THD) at 100%
non-linear load with
Crest Factor 3, %
Output voltage THD at 3 3
100% linear load, %
Peak voltage 2 No reference
regulation for 100%
non-linear loads, %
Transient voltage +/- 8 % +/-5 %
amplitude under 100%
load change
Settling time of 10 msec 50 msec
voltage transient
under 100% load
change
Overload handling Solid State Static Relay transfer Liebert will drop
circuit Bypass Switch sensitive loads
during transfers
because of relay
power interruption
Overload capacity Limited only by the 125% for 10 min, EPC has the
input circuit 250% for 12 cycles highest possible
breaker in the overload
electric power line capability
Transfer time from Less than 1 millisec 4 millisec for Liebert's UPS has
the inverter to the overloads and more the same transfer
input AC source for faults time as Standby
UPS (SPS)
Transfer time from Less than 1 millisec 4 millisec for Liebert's UPS has
the input AC source overloads and more the same transfer
to the inverter for faults time as Standby
UPS (SPS)
Laser printer on/off On inverter, without
handling method using Static Bypass
Switch
Default power To the input power No reference Output voltage
connection of the line by normally Mean Time Between
load closed contacts Failures is over
100 years
INPUT UTILITY LINE INTERACTION PERFORMANCE
Input current THD at 5 5
full load, %
Input power factor Over 0.99 0.98 Liebert's power
factor data
contradict input
current THD data
Startup inrush 25 % of nominal 150% for 3 cycles EPC does not need
current oversized
electrical service
INSTALLATION PARAMETERS
HxWxD in inches (mm) 28 (711) x 8.25 29 (737) x 9 (229) Liebert will not
(210) x 24 (610) x 27 (686) slide under the
desk
Weight in lbs (Kg) 225 (101.8) 270 (123)
Operating temperature 0 - 40 0 - 40
range, Cº
Maximum operating 95%, non-condensing 95 %,
humidity non-condensing
Maximum altitude 10,000 (3,000) 4,000 (1,000) EPC will operate
without derating, ft without derating
(m) in the mountains
Efficiency at full 92 85 EPC provides lower
load, % load on air
conditioning,
lower operating
cost
Heat generation at 1,250 (365) 2,411 (750) EPC dissipates a
full load, BTU/h half of heat
(Watts)
Cooling method Forced air Forced air
Audible noise under 55 55
full load, at 1m
distance, dB
Location of input On the FRONT On the BACK EPC products are
power ON/OFF control convenient to
operate
Input connections Field wiring Field wiring
terminals terminals
Output connections Field wiring Field wiring
terminals terminals
External battery 6-pin AMP connector Not available
connections
Grounding Separate grounding Separate grounding
requirements conductor conductor
Maintenance bypass External two pole Internal, not for Liebert's UPS
switch requirements make-before-break all electrical requires
switch between two services additional
pairs of input and isolation
output phase transformer for
conductors electrical
services not
available with an
internal bypass
Remote Emergency Normally open Available EPC's low voltage
Power Off Switch contact for 12 V, 10 with reference to
ma signal from UPS, ground provides
referenced to ground for low cost
wiring
DISPLAY Multifunctional Multifunctional LCD
backlit LCD display, display
remaining time to
shutdown
LOAD COMPUTER INTERFACES
Interface connectors One DB-9 with full Multiple EPC has simplicity
duplex RS-232
communications and
contact closure
capabilities
Compatibility All software and None, uses EPC allows use of
hardware products proprietary the most
compatible with Liebert's software comprehensive line
Systems Enhancement of interface
Corporation products for LANs
standards
RS-232 protocol Compatible with Custom, OPTIONAL EPC uses the
draft UPS Management largest MIB
Information Base available
(MIB) per RFC 1628
by SNMP Research,
Inc.
REGULATORY COMPLIANCE
SAFETY
USA UL 1778, Certified by UL Certified by UL
Uninterruptible Power
Supply Equipment
CANADA CAN/CSA-C22.2 Certified by UL Certified by UL
No. 107.1-M91
Commercial and
Industrial Power
Supplies
International CEI/IEC Certified by UL, CB No
950, Safety of report available
Information
Technology Equipment,
Including Electrical
Business Equipment
CENELEC European Certified by UL, CB No
Standard EN 50 091-1, report available
Uninterruptible Power
Systems, Part 1,
General and Safety
Requirements
PERFORMANCE STANDARDS
International IEC Certified by UL, CB No
146-4, Semiconductor report available
Converters
CENELEC European Certified by UL, CB No
Standard EN 50 report available
091-3-1,
Uninterruptible Power
Systems, Part 3-1,
General Performance
Requirements
International IEC 555 Certified by UL No
and European Standard
EN 60 555 -2,
Disturbances in
Supply Systems Caused
by Household
Appliances and
Similar Equipment,
Part 2: Harmonics
ELECTROMAGNETIC COMPATIBILITY STANDARDS
USA FCC, Part 15, Certified by UL Yes
Subpart J, Class A
American National Certified by UL No reference
Standard IEEE
C62.41-1991 (option
under UL 1449 -
Transient Voltage
Surge Suppressers)
IEEE Recommended
Practice on Surge
Voltages in
Low-Voltage AC Power
Circuits
CENELEC European Certified by UL No
Standard EN 50 091-2,
Uninterruptible Power
Systems, Part 2, EMC
Requirements
International IEC Certified by UL that No
801-2, under the most
Electromagnetic severe specified
Compatibility for Level 4 condition,
Industrial-Process NORMAL performance
Measurement and occurs within the
Control Equipment. specification limits
Part 2: Electrostatic
Discharge
Requirements
International CEI / Certified by UL that No
IEC 1000-4-3 (former under the most
IEC 801-3), and EN severe specified
50140, Level 3 condition,
Electromagnetic NORMAL performance
Compatibility; Basic occurs within the
Immunity Standard; specification limits
Radiated,
Radio-Frequency
Electromagnetic
Field; Immunity Test
International CEI / Certified by UL that No
IEC 801-4, under the most
Electromagnetic severe specified
Compatibility for Level 4 condition,
Industrial-Process NORMAL performance
Measurement and occurs within the
Control Equipment. specification limits
Part 4: Electrical
Fast Transient /
Burst Requirements
International IEC Certified by UL that No
801-5 (and CEI), under the most
Electromagnetic severe specified
Compatibility for Level 4 condition,
Industrial-Process NORMAL performance
Measurement and occurs within the
Control Equipment. specification limits
Part 5: Surge
Immunity Requirements
Sources: Liebert's specifications and EPC's tentative specifications for 2.5 to 15 kVA DSP UPS products