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UltraLITE Model ELU (1.5kW to 14kW)


Meeting the NFPA 101 and NFPA 111 standards, the "UltraLITE Model ELU" is considered "Life Safety Equipment". It is also UL 924 listed as "Emergency Lighting Equipment", providing the required 90 minutes of emergency backup power, and is 100% compatible with all lighting applications and life safety systems. The Model ELU provides uninterrupted, regulated, continuous sinewave output for use with "normally on" lighting fixtures and exit lamps, as well as standby output for use with "normally off" emergency lighting fixtures. It is also generator-compatible. The Model ELU's voltage regulation and performance characteristics make it an advantageous choice over competing lighting inverters.

Whether fed from the AC power source or even while in battery mode, the ELU has a peak overload capability up to 1400% to accommodate inrush current from LED fixtures!

Available in 1.5kW to 14kW single phase sizes, the "UltraLITE" Model ELU is ideal for schools, arenas, subways, parking structures, hospitals, airport terminals, and many other similar applications.

Now Seismic-Rated!
The “UltraLITE Model ELU” has been shake-table tested and meets seismic standards which satisfy applicable portions of the California Building Code (CBC 2016) and the International Building Code (IBC 2015). The verification testing required is recognized and accepted throughout the U.S. and many other countries.
"Learn more about our seismic testing and certification!"

Single Phase Sizes: 1.5kW, 2.2kW, 3.0kW, 3.5kW, 4.2kW, 5.0kW, 6.0kW, 7.0kW, 7.5kW, 8.5kW, 10kW, 12.5kW, 13.5kW, 14kW

Learn more about the “NFPA 101 Life Safety Code”, UL 924 listings, on-line and standby off-line lighting inverter topologies, as well as how our inverters meet (and can exceed!) NFPA 101 … read our "Egress Lighting Solutions" brochure! And for our Canadian customers (including specifying engineers, lighting designers, and distributors), read our CSA / NBCC compliance addendum, which supports the selection and application of our emergency lighting inverters in Canada!

Features & Benefits
Technical Specs

General Specifications

Guide Specifications

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Features & Benefits

  • Listed UL 924 “Emergency Lighting Equipment” and “Auxiliary Lighting and Power Equipment”
  • Listed C-UL to CSA C22.2 No. 141-15 “Emergency Lighting Equipment”
  • Uninterrupted, regulated, continuous sinewave output for use with "normally on" lighting fixtures and exit lamps, HID compatible
  • Standby output for use with "normally off" emergency lighting fixtures
  • Delivers highly filtered and spike free power to emergency lighting fixtures and "Life Safety Devices"
  • True online double conversion topology provides conditioned, regulated power and 100% reliability to emergency lighting loads
  • System approved for 42k AIC source
  • Standard internal make before break bypass switch
  • Fuzzy Ranging provides added security during deep brownout conditions as low as -40% of the nominal voltage, without battery consumption
  • High-speed static bypass
  • Front access distribution, with lockable drop-down panel door
  • Generator-compatible
  • NEMA1 Enclosure
  • Optional zone sensing
  • Optional control device override (wall switch, occupancy sensor, dimmer, etc.)
  • Optional CB trip indicator alarm / light
  • Field modifiable distribution
  • Dual output voltage configurations: 120V & 277V, 120V & 208V, 120V & 240V, 120V & 347V
  • Optional NetMinder Ethernet/MODBUS/BACnet adapter for remote monitoring

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Technical Specs

  • Input Operating Voltage Range: +12%, -30% typical, load-dependent, without battery usage; +12%, -15% at full load
  • Input Frequency: 60 Hz, +/- 2%
  • Input Current Harmonic Distortion: < 5% THD
  • Output Sine Wave Voltage: Typical 3% output THD with linear load
  • Output Regulation: Typically better than +/- 2%
  • Output Circuit Breaker Pole Spaces Available: 20 pole without trip indicator alarm / 10 pole with trip indicator alarm
  • Overload: Up to 125% for 30 cycles, 150% for 4 cycles when fed from the AC power source, or on battery (without use of static bypass)
  • LED Inrush Rating: Peak overload capability of 1400% (models up to 10kW) and 1100% (models 12.5kW – 14kW) to accommodate inrush current from LED fixtures - (without the use of static bypass)
  • Standard Unit Operating Temperature 0°C to 40°C
  • C-UL listed to CSA C22.2 No. 141-15 Emergency Lighting Equipment at 20° C to 30° C
  • Inverter Efficiency: 90% typical
  • Audible Noise: < 50dB

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  • Schools / Universities / Dormitories
  • Security / Public Address Systems
  • Arenas / Stadiums
  • Subways / Mass Transit
  • Parking Structures / Garages
  • Hospitals / Clinics
  • Shopping Malls
  • Banks / Financial Institutions
  • Airport Terminals
  • Casinos / Resorts
  • Hotels / Motels
  • Apartment Buildings
  • Prisons

  • What are centralized lighting inverters and why use them?

  • A centralized lighting inverter is an electronic system that converts DC battery power to standard AC voltages to provide back-up for lighting systems during a power outage. Centralized lighting inverters provide a single point source of power for all emergency lighting and exit signs. This source provides for a controlled logical wiring scheme and results in a single point for monthly and annual testing.

  • Is the UltraLITE Model ELU a fast transfer lighting inverter system?

  • The answer is NO...it's better! Fast transfer systems do experience a break in power. The Model ELU has an online, double conversion topology, which means that the inverter is always on. If there is a loss of power, the inverter will draw energy from the batteries instead of the normal AC input source, with no break in the power. Thus, the Model ELU exceeds the performance of all fast transfer systems.

  • Does the UltraLITE Model ELU preserve battery life?

  • YES! The more a battery is discharged, the shorter the life. The Model ELU incorporates Fuzzy Ranging into its design. Fuzzy Ranging is a feature that adjusts the switch to battery point based upon the percentage of load. Under lighter loads, the switch to battery point can be as low as -40% of the nominal voltage. Most other inverters will switch to battery at around -15% of the input voltage. So in the event of a brownout condition, the Model ELU will still maintain regulated power to the lights, without switching to battery back up. This results in the extended life of the batteries, which reduces the cost of maintenance.

  • Does the UltraLITE Model ELU have a transfer time, and if so, is it important?

  • The Model ELU DOES NOT have a transfer time because of its online, double conversion topology. Transfer time is the time it takes to recognize and deliver emergency power. The transfer time of any standby or "fast transfer" inverter results in a momentary interruption or break in output voltage. For many applications, this is simply not desirable. A zero transfer time insures that there is no interruption of power to the lighting fixtures. This is a very important factor with HID and high pressure sodium lighting. Lighting control systems and alarm circuits may also need a no break type system because of the circuit power requirements.

  • Does the UltraLITE Model ELU extend the life of lighting fixtures?

  • YES! The Model ELU insures clean, regulated and isolated power to all lighting fixtures, protecting them from adverse electrical conditions that could damage the fixtures or shorten lamp life. This protection improves the overall performance and reliability of emergency lighting fixtures and the life safety system.

  • Is the UltraLITE Model ELU capable of operating both normally off and normally on lighting fixtures?

  • YES! Available on the Model ELU is a Normally On and optional Off output bus. Both outputs may be configured with branch circuit breakers, allowing for an easy and less expensive installation.

  • What are the benefits associated with supplying conditioned power and regulated voltage to emergency lighting fixtures?

  • The UltraLITE Model ELU supplies conditioned power and regulated voltage for HID and high pressure sodium lighting, as well as electronic ballasts and LED lighting, resulting in: Voltage sag and surge protection. Longer wire runs without upsizing the wire because the regulated voltage source minimizes voltage drop. Less-frequent replacement of ballasts, lamps, and LED lighting fixtures in particular! Facility egress lumens are maintained 100% (will not diminish) over the full 90 minutes of emergency power.

  • Can the UltraLITE Model ELU support different types of lighting at different voltages simultaneously?

  • YES! If emergency power must be supplied at two different nominal voltages (i.e. 120 VAC and 277 VAC) to power the designated emergency lighting fixtures, the Model ELU can be configured to satisfy this requirement. The Model ELU can supply both voltages simultaneously, without the need of external transformers. This capability applies to both normally on and normally off fixtures. Output distribution breakers can be provided to support any available voltage configuration. Dual voltage combinations include: 208/120V, 240/120V, 277/120V, 347/120V

  • Is the UltraLITE Model ELU NFPA 101 compliant?

  • YES! The Model ELU is compatible with NFPA 101, "Periodic Testing of Emergency Lighting Equipment".

  • Is the UltraLITE Model ELU compatible with HID and high pressure sodium lighting?

  • YES! The Model ELU is a true no-break lighting inverter system, 100% compatible with HID and HPS fixtures. Stand-by inverters produce up to a 1/2 cycle of power interruption, causing HID lighting to extinguish. Once this occurs, it will typically take the lamp 10 minutes or so to regain full illumination.