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LTN Series UPS (700VA - 2.1kVA)
Description
The LTN Series is a UPS designed for harsh environment and outdoor applications. The LTN is available in a NEMA2 rating for indoor harsh enviroment conditions and NEMA 3R & NEMA 3RX configurations for outdoor applications. The LTN Series provides conditioned, regulated, no-break power to loads in high and low temperatures as well as harsh outdoor environments where it is difficult to place a UPS.

Sizes: 700VA, 850VA, 1.0kVA, 1.2kVA, 1.4kVA, 1.6kVA, 1.8kVA, 2.1kVA - Single Phase



Features & Benefits
Technical Specs
Applications
FAQ
General Specifications

Guide Specifications

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Features & Benefits

  • Uninterrupted, regulated, continous sinewave output for use with "normally on" lighting fixtures and exit lamps
  • Standard NEMA 2 Configuration
  • Optional NEMA 3R & 3RX Stainless Steel Configurations
  • Broad Operating Temperature Range
  • Wall, Pole and Floor Mounted Configurations
  • Front Access Design
  • Optional Output Circuit breakers
  • Generator Compatible
  • Insulated, Powder Coated Enclosure (NEMA3R)
  • No-Break Transfer to Battery Power
  • Fuzzy Battery Logic Improves Battery Life


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Technical Specs

  • Standard NEMA2 Unit Operating Temperature: 0°C to +40°C
  • Optional NEMA 3R & 3RX Units Operating Temperature: -35°C to 50°C
  • Input Operating Voltage Range: +10%, -40% typical, load dependent, without battery usage
  • Output Line Voltage Regulation: +/- 3%
  • Output Load Regulation:+/- 3%
  • Overload Rating: 125% for 10 seconds, 1000% for 3 Cycles
  • Output Sinewave Voltage: Maximum 3% Harmonic Distortion, any single harmonic
  • Common Mode Noise Attenuation: 120dB
  • Transverse Mode Noise Attenuation: 70dB
  • Total system MTBF: 100,000 Hours
  • 89% Efficiency
  • Isolation: Galvanic


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Applications

  • Indoor and Outdoor Security Systems
  • Security Cameras Surveillance Systems
  • Parking Structures / Garages / Tollgates
  • Traffic Signals
  • Mass Transit
  • Industrial / Automated Process Control
  • Pump Stations
  • Water Treatment Facilities
  • Irrigation Systems
  • Transmission Repeaters
  • SCADA Systems
  • Cell Phone Towers


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FAQ

  • Can the LTN operate in high temperature, wind, rain, sleet and snowy conditions?

    • Yes. The LTN is available in a full outdoor rated UPS system able to withstand virtually all outdoor conditions. The LTN is designed and insulated in such a manner not to allow the weather elements to impede the operation of the UPS.



  • How does the LTN correct for bad power?

    • The ferro-resonant transformer remains in the power circuit 100% of the time. Since the transformer is designed to pass only 60 cycles, the power distortion of other frequencies will not be present in the output. The LTN corrects for bad input voltage waveforms with distortion levels as high as 40%. Most standby UPS units will not tolerate over 7% distortion, causing them to switch to battery backup. The LTN preserves the battery power for outages only.



  • Can the LTN be mounted to a wall or a pole?

    • Yes. Available on the LTN are mounting brackets for either wall mounted or pole mounted applications.



  • How does the LTN regulate voltage?

    • The LTN incorporates a highly efficient ferro-resonant transformer that produces a steady output voltage over a wide range of input voltages. Even in severe brownout conditions, the LTN delivers regulated voltage to within +/-3% without using battery power.



  • What level of TVSS protection is offered by the LTN?

    • Typical TVSS protection consists of one or two small metal oxide varistors (MOV) with ratings of typically 6,000 amps. These ratings lead most to believe that these devices will actually handle 6000 amps. This is only half of the truth. Most TVSS devices have a maximum current rating, but these ratings are only for a very short period of time; in most cases 160 microseconds or less. So if a TVSS device rated for 6000A, and a high voltage spike occurs (very common), which lasts for more than 1/10th of a cycle (also very common), the TVSS unit will burn up and thus the equipment connected to it may become damaged. In addition, the TVSS unit will also need replacing. This results in unnecessary time and money, wasted! There are also so many other drawbacks regarding TVSS i.e. life expectancy, reliability, durability, nuisance failures etc. In contrast, the LTN protects the load with 15 pounds or more of pure transformer steel. The transformer absorbs the high energy transients for a much longer duration thus leaving the load solidly protected. Plus the LTN attenuates transients of a much higher magnitude than TVSS. In addition, it also replenishes the energy where notching and reverse spiking occur.



  • How does the LTN correct for improper site wiring?

    • Site wiring, configurations and power quality can be an unknown. There may be voltage variations, ground current that causes disruptive operation (unsolvable with TVSS), mixed grounds and other site problems that cause system malfunctions. In many cases neutral and ground are bonded in secondary distribution panels when they shouldn't be. This produces a secondary path for return current. Also, failed filter components, typically shorted capacitors placed neutral to ground within electronic equipment, produce situations that cause a portion of the neutral current to follow the ground path. In both cases a portion of the intended neutral current flows through the ground system; producing what is referred to as a "noisy ground". The LTN's ferro-resonant power purification transformer generates the equivalent of a new power source dedicated to the load. It creates a new clean ground reference and establishes a central ground point for all loads. The new ground assures that the equipment connected to it have a new clean ground reference reducing or in many cases eliminating unwanted ground noise caused by improper site wiring.



  • Does the LTN do anything to correct for load generated harmonics?

    • Yes. The LTN's ferro-resonant transformer acts as a band pass filter, allowing only 60 cycles to pass. Load generated noise and harmonics are trapped in the output of the LTN, preventing the unwanted harmonics from reaching the input power source. Standby UPSs simply don't do anything for harmonics; you live with the results.



  • Does the LTN preserve the battery life in harsh temperature conditions more than other UPS's?

    • Yes. With Fuzzy Battery Logic, the LTN can maintain normal operation down to -40% of the input voltage, thus conserving battery use. The LTN also maintains a stable operating temperature within the cabinet so that the battery life lasts longer than other outdoor units.