Catalog
Number
Notes
FEATURES & SPECIFICATIONS
INTENDED USE — An off-line AC power system for the emergency operation of LED HID, incandescent
and fluorescent emergency lighting loads that provides full light output for 1-1/2 hours of operation.
CONSTRUCTION — Inverter: Solid-state, pulse width modulated inverter, utilizing IGBT technology. Offline uninterruptible system has 2-millisecond transfer time. 4800 to 50000 VA output ratings available.
Sinusoidal output waveform has <3% maximum Total Harmonic Distortion for linear load. Operating
efficiency is 97% at full load.
Input: 120/208V or 277/480V, 3-phase, 4-wire input.
Protection: Input circuit breaker standard.
Synchronizing slew rate is 1 Hz per second nominal. Harmonic distortion <10%.
65KAIC (amp input current) rating.
Output: 120/208V or 277/480V, 3-phase, 4-wire output.
Output frequency is 60Hz and is ±0.05Hz during emergency mode.
Load power factor is 0.5 lag to 0.5 lead.
Cabinet: Free-standing NEMA Type 1.
Custom manufactured. 14 gauge steel cabinet with hinged lockable doors.
Modular design enables versatile installation.
Stackable cabinets on 4800-16700VA.
Cooling: Forced air during emergency mode.
Conduit entry through 2” knockouts on top or left side.
Automatic low battery disconnect; automatic restart upon utility return.
Extended run times available.
Fuse and fuse/circuit breaker above 2400VA.
Charger: Microprocessor controlled for various battery types and temperature compensating (recharge
per UL924 spec).
Overload capacity to 100% continuous rating, is 115% for five minutes to 125% for 12-line cycle. Lowvoltage battery disconnect, short-circuit proof, current-limiting, fused battery circuit, reverse polarity,
brownout protection standard.
Self-Diagnostics: Programmable self-diagnostic testing for five minutes monthly and 90 minutes
annually.
Microprocessor controlled 2 x 20 character display with touch pad (4 x 4) controls, functions and data logging.
LCD displays input voltage, output voltage, battery voltage, battery current, output current, output VA,
temperature and inverter wattage.
Five LED indicators display utility present, battery power, battery charging, system ready and fault.
Standard RS232 diagnostic interface.
Manual maintenance bypass switch is standard.
ORDERING INFORMATION
EAC 3FT
3-PHASE
FAST-TRANSFER AC POWER SYSTEM
Alarm functions: One audible alarm will indicate high/low battery charger fault, near low battery, low
battery, load reduction fault, output overload, high/low AC input volts, high ambient temperature,
inverter fault, output fault and optional circuit breaker trip.
Battery: Available with maintenance-free, sealed lead-calcium or lead-calcium batteries with 20-year
life.
Discharge cycle of 90 minutes at full load with fully charged batteries.
Standard 24-hour battery recharge.
LISTINGS — UL listed. Meets UL 924, NFPA 101, NFPA 70, NEC and OSHA.
WARRANTY — One-year full warranty within the 48 contiguous states on system electronics. Battery warranty details listed on back. System must be installed within 180 days of
battery shipment or warranty will be void. Two-year warranty on systems electronics available with purchase of FSP (factory start-up program). Complete warranty terms located at
www.acuitybrands.com/CustomerResources/Terms_and_conditions.aspx
Actual performance may differ as a result of end-user environment and application.
Note: Specifications subject to change without notice.
Example: EAC 3FT 6000 208 OB2 DFC
Lead times will vary depending on options selected. Consult with your sales representative.
EAC
3FT
Family
EAC
Type
Battery type
Emergency AC
power system
(blank)
LC20
10-year lead
calcium
20-year lead
calcium
System type
3FT
3-phase fast
transfer
VA rating
4800
6000
8000
10000
12500
16700
24000
33000
40000
50000
Voltage1
Input/Output
208 120-208/
120-208
480 277-480/
277-480
Output circuit breaker2
(blank)
OB1
OB2
OB3
OB4
OB5
OB6
OB7
OB8
OB9
0B10
OB11
0B12
None
Options
(blank)
None
Battery
12HR
12-hour battery recharge
Supervisory
RMP
Remote meter panel
XMBYP
External maintenance bypass switch
Miscellaneous
FSP
Factory start-up program
DFC
Form “C” contacts
OTA
Output trip alarm
NOFF
Normally OFF output circuit3
MODEM
External modem for RS232
SEISMIC
Zone 4 4
Notes
1 Consult factory for other voltage requirements. Special voltages may affect the weight, size and number of cabinets.
2 Standard 20-amp, normally ON unless otherwise specified.
3 Normally off load cannot exceed 20% of total VA rating with any combination of HID loads.
4 2006 Seismic IBC ASCE 7-05 occupancy category 3 sight class D qualification.
EMERGENCYEAC-3FT
EAC 3FT 3-Phase Fast Transfer AC Power System
SPECIFICATIONS
CONSTRUCTION
Information provided is for lead-calcium batteries only.1
Output Max. input Max. input Battery
rating AC 120/208V AC 277/480V voltage Battery Heat loss
(VA)
(Amps)
(Amps)
(VDC)1 (Amps) (BTU/HR)
Inverter cab. dim.
width, height, depth
(in/cm)(in/cm)(in/cm)2
Battery cab. dim.
width, height, depth
(in/cm)(in/cm)(in/cm)2,3
Number
of battery
cabinets2,3
Inverter
weight
(lbs/kgs)
Battery weight
with cabinets
(lbs/kgs)
Non reflect.
aud. noise
dBa @ 6 ft.
45
4800
17
7
144
39
245
30/77 47/120 25/64
30/77 47/120 25/64
1
535/243
1098/499
6000
21
9
180
39
300
30/77 47/120 25/64
30/77 47/120 25/64
1
535/243
1320/600
45
8000
28
12
240
39
400
30/77 47/120 25/64
30/77 47/120 25/64
1
535/243
1712/778
45
10000
35
15
144
81
500
30/77 47/120 25/64
30/77 47/120 25/64
2
639/290
2196/997
45
12500
43
19
180
81
660
30/77 47/120 25/64
30/77 47/120 25/64
2
639/290
2640/1198
45
16700
58
25
240
81
840
30/77 47/120 25/64
30/77 47/120 25/64
2
639/290
3424/1554
45
24000
84
36
240
117
1200
44/112 72/183 31/79
48/122 72/183 31/79
1
1250/567
5140/2332
45
33000
115
50
240
160
1500
44/112 72/183 31/79
48/122 72/183 31/79
2
1250/567
7380/3348
45
40000
139
60
240
194
1980
44/112 72/183 31/79
48/122 72/183 31/79
2
1450/658
8700/3947
45
50000
174
75
240
243
2520
44/112 72/183 31/79
48/122 72/183 31/79
2
1450/658
10520/4772
45
Relative system cost
Expected life +
Maintenance
Optimum ambient
temperature range (F)
Full
Sealed lead calcium
1.0
10 years
None
32° – 90°
1 year
9 years
Sealed lead calcium, 20-year long life (LC20)
1.3
20 years
None
32° – 90°
1 year
19 years
Notes
1 Consult factory for lead-calcium and 20-year (LC20) battery information.
2 Special voltages may effect the weight, size and number of cabinet.
3 Battery cabinets should be located to the right side of main cabinet.
BATTERY COMPARISON
Type
Warranty
Pro rata
+ Under normal operating conditions
SYSTEM DIAGRAM
Maintenance Bypass Line
Utility
Power
Line
Transformer
(4)
Battery
Charger
(1)
Battery
(2)
Inverter
(3)
Bypass
Switch
(5)
AC No-Break
Power Output
LEGEND
Normal Flow
Battery Back-up
EAC-3FT
EMERGENCY: One Lithonia Way, Conyers, GA 30012 Phone: 800-334-8694 Fax: 770-981-814 www.AcuityBrands.com © 2003-2016 Acuity Brands Lighting, Inc. All rights reserved. Rev. 05/31/16