CONSTRUCTION
Basic UPS Topology On-Line Stand-By with EPC does not need
Ferroresonant derating like Best
Voltage Regulator for a)
instantaneous
overloads; b)
non-linear loads;
c) capacitive
loads; d)
inductive loads or
special narrow
frequency bands
for backup
generators
Inverter Provides 100% load Provides 100% load
power 100% of time power only during
backup
Converter Provides 100% load Provides power only
power to inverter to charge the
battery
Bypass Switch Solid State Static No automatic bypass
Switch transfers switch
output between
inverter and input
utility
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 in a
separate cabinet
OUTPUT ELECTRICAL RATINGS
Rated power, kVA 6.25 @ 250 V 7.0
Rated power, kW 4 5
Phase rated current, 25 29 @ 240 V
A, rms
Phase rated current, 75 No reference
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 with EPC has universal,
208; 220; 230; 240; transformer taps at worldwide output
250; 120; 208, 240 voltages
Dual Phase: 100/200;
120/208; 120/240
Number of phases 1 or 2 1 EPC has universal,
worldwide output
phase
configurations
Allowed phase 120; 180; 240 Not applicable
displacements,
degrees
Nominal frequencies, 50 or 60 60
Hz
INPUT FOR ELECTRIC UTILITY
Nominal voltages, V Single Phase: 200; Single Phase, 120; 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 35 -65 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 57-63 EPC is compatible
with backup
generator service
POWER CONDITIONING PERFORMANCE: Voltages between power carrying
conductors
OVER and UNDER VOLTAGES
Input voltage range 100 - 275 V 192 - 276 V @ 240 V EPC can operate at
nominal the extreme of low
voltages required
for worldwide
compatibility
Output voltage +/- 0.3% +/- 3% EPC controls to a
regulation finer tolerance
using Digital
Signal Processors
(DSPs)
FREQUENCY DISTURBANCES
Input frequency range +/- 5 to 6 Hz +/- 3Hz
Output frequency Selectable from +/-1 Same as input BEST does not
range to 3 Hz regulate frequency
on the output
Output 1 Hz/sec standard Unavailable
synchronization speed
(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 Output voltage EPC has better
us Combination Wave change less than 1% change less than 2% surge immunity
with amplitude 6 kV of nominal 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
reserve time at full
load, min
Internal battery 20 33
reserve time at half
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% No reference 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% No reference EPC does not
nominal reserve time require a separate
for optional battery charger
sets, hours
Maximum recharge 5 5
current for user
battery, A
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 No reference EPC does not need
derating for
capacitive loads
Inductive-Resistive From +0 to 1 No reference EPC does not need
derating for
inductive loads
Non-linear load crest ANY 2.7 to 3.5
factor
PERFORMANCE
Output voltage total 5 Distortions are EPC does not need
harmonic distortion very large any derating for
(THD) at 100% non-linear loads
non-linear load with
Crest Factor 3, %
Output voltage THD at 3 5
100% linear load, %
Peak voltage 2 No reference
regulation for 100%
non-linear loads, %
Transient voltage +/- 8 % No reference, but
amplitude under 100% very large
load change
Settling time of 10 msec No reference
voltage transient
under 100% load
change
Overload handling Solid State Static None
circuit Bypass Switch
Overload capacity Limited only by the 125% for 10 min, EPC has the
input circuit 150% surge highest possible
breaker in the overload
electric power line capability
Transfer time from Less than 1 millisec Not applicable
the inverter to the
input AC source
Transfer time from Less than 1 millisec Not applicable
the input AC source
to the inverter
Laser printer on/off On inverter, without Severe output
handling method using Static Bypass voltage sag
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 No reference, but EPC does not need
full load, % large higher current
capacity input
electrical service
Input power factor Over 0.99 No reference, but Toshiba's power
low factor data
contradict input
current THD data
Startup inrush 25 % of nominal No reference, but EPC does not need
current large oversized
electrical service
INSTALLATION PARAMETERS
HxWxD in inches (mm) 28 (711) x 8.25 36.5 (930) x 19 Space saving
(210) x 24 (610) (485) x 32 (815) -
and the same for
batteries
Weight in lbs (Kg) 225 (102) 578 (274) EPC's lower weight
reduces shipping
costs and floor
loading
Operating temperature 0 - 40 0 - 40
range, Cº
Maximum operating 95%, non-condensing 95%, non-condensing
humidity
Maximum altitude 10,000 (3,000) 10,000 (3,000 BEST needs
without derating, ft operating
(m) temperature
derating 1 deg.
Per 1,000 ft.
Efficiency at full 92 90 in Stand-By mode
load, %
Heat generation at 1,250 (365) 1,896 (556) EPC dissipates
full load, BTU/h less heat
(Watts)
Cooling method Forced air Forced air
Audible noise under 55 52
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 No reference
connections
Grounding Single grounding Single grounding
requirements conductor conductor
Maintenance bypass External two pole Internal BEST's UPS
switch requirements make-before-break break-before-make requires
switch between two additional
pairs of input and isolation
output phase transformer for
conductors 120 V output
circuits to use an
external
maintenance bypass
switch
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 Vacuum Fluorescent
backlit LCD display,
remaining time to
shutdown
LOAD COMPUTER INTERFACES
Interface connectors One DB-9 with full Connector for
duplex RS-232 RS-232
communications and
contact closure
capabilities
Compatibility All software and None, uses EPC allows use of
hardware products proprietary BEST's the most
compatible with software comprehensive line
Systems Enhancement of interface
Corporation products for LANs
standards
RS-232 protocol Compatible with Custom MIB Uses the largest
draft UPS Management MIB available
Information Base
(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 Verified by BEST
Subpart J, Class A
American National Certified by UL Not clear
Standard IEEE definition
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: BEST's specification sheets Model FE7KVA and EPC's tentative specifications for 2.5 to 15 kVA DSP UPS products