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Models
750VA
1050VA
1425VA
1800VA
2250VA
1.7kVA
Part Number
0520-0750U
0520-1050U
0520-1425U
0520-1800U
0520-2250U
LI1.7KX
Capacity (VA/Watts)

750/450

1050/670

1425/950

1800/1260

2250/1600

1700/1275

Dimensions
inches
mm
HxWxD


7x5.5x14.4
178x140x365


9x6.8x17.9
227x172x454


13.25x7.7x20.2
336x194x511


17.25x8x20
440x205x510

Weight
lbs
kg


31
14


44
20

50
23

81
37

122
55.3
Input Connection

NEMA 5-15P

NEMA 5-20P
NEMA L5-30P
see below¼
Output Connection
quantity
type



(4) 
NEMA 5-15R



(6)
NEMA 5-15R

(4) NEMA 5-15R
(6) NEMA 5-20R

(2) NEMA 5-15R
(2) NEMA 5-20R
(1) NEMA L5-30R



see below¾

Typical Runtime
full load
half load
(minutes)


8
20


8
22


8
22


8.5
24


5
17


13
40
Operation
Nominal Input Voltage 120 VAC Sincle-Phase (110 and 128 volts options, user-selectable) 120 VAC
Input Voltage Range (for on-line operation)

96 to 146 VAC nominal (up to 90 to 156 VAC, user-selectable)

92 to 136 VAC nominal 

Operating Frequency (on-line)

50/60Hz ± 5Hz, autosensing

Nominal Output Voltage

120VAC single phase (110 and 128 volt options, user-selectable)

 120VAC single phase

Output Voltage Regulation
(on line)

± 10% of nominal (at factory default setting)

Overload Capacity

110% ±8%

Transfer Time

Within CBMA limits, undetected by modern computer loads

On-Battery Voltage

120VAC ± 7%

120 to 127 VAC

Operating Frequency

50/60Hz ± 5Hz, autosensing

Output Voltage Waveform

Sine wave

Output Protection

Automatic current and overvolt protection

Input Protection

Circuit Breaker

Fuse

Recharge Time (with half load)

3 hours to 95%

7 to 12 hours to 85% 

Lightning & Surge Protection

Tested to ANSI/IEEE C62.41 categories A & B

Efficiency

>95% on-line

Safety Certification

UL1778, cUL; tested to the electrical requirements of UL 1449

UL1778, cUL

EMI Compliance

FCC Class B

FCC Class A

Communications

BestDockô slot„

RS-232 serial port DB-9„

Testing Standards ANSI/IEEE C62.41 (1991); National Bureau of Standards FIPS-PUB-94;
IEC 801-2, 801-3, 801-4, 801-5
Indicators Buck/Boost status, Battery status, Load level,
Battery discharge level, Alarms (shutdown, battery test fail)
Audible Alarms Battery discharge, Low battery, Overload,
Battery replacement needed, UPS fault
Environmental
Operating Temperature

0† to 40† (32† to 104†F)

Storage Temperature

-15† to 50†C (5† to 122†F)

Relative Humidity

0-95% non-condensing

Audible Noise at One Meter

<40 dbA at 1 meter (<50 dBA for 1800VA and 2250VA units)

38-44dB depending on model

Altitude 3,000m (10,000 ft.) without derating
All specifications subject to change without notice.
¼ LI1.7KFX has (4) NEMA 5-15R, (2) NEMA 5-20R.  LI 1.7KGX has (4) NEMA 5-15R, (2) CSA NEMA 5-20R.
¾ LI1.7KX models runtimes based on one battery pack.
DB9 female for RS-232 communications and contact closure.

Fortress Runtimes for Typical Applications in Minutes
Load (VA) 50 100 200 300 400 500 600 750 900 1050 1250 1425 1600 1750 2200
0520-2250U 330 150 95 68 51 41 34 28 24 19 16 13 10.5 9 5
0520-1800U 330 150 95 68 51 41 34 28 24 19 16 13 10.5 9 -
0520-1425U 235 155 89 58 42 33 27 20 15 12 9 8 - - -
0520-1050U 184 140 63 39 29 23 18 12 10 8 - - - - -
0520-0750U 110 72 40 26 19 14 11 8 - - - - - - -

 

   

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Bomara Associates Phone: 800.5BOMARA (800.526.6272) Phone: 978.452.2299 Fax: 978.452.1169 3 Courthouse Lane, Chelmsford, MA 01824 USA
email: bobr@bomara.com      web: www.bomara.com
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