"World's recognized authority in power treatment"

LT Series (700VA - 2.1kVA)

The LT Series is a single phase, seamless transfer, uninterruptible power supply. This product provides premium power to various types of loads, including industrial and information technology. The overall function of the LT is to take polluted, fluctuating, and erratic electrical power and purify it or replace it (as in a blackout), with well-regulated, clean, computer-grade power.

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

Features & Benefits
Technical Specs

General Specifications

Guide Specifications

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Features & Benefits

  • Steady, regulated voltage to +/- 3% provides proven performance and extends the life of your equipment.
  • Highest level performance sinewave output matches your system's requirements.
  • 100% power conditioning.
  • No-break, continuous power provides seamless transfer to back-up power, and prevents data loss.
  • Field-expandable power ratings, and optional extended battery runtimes.
  • Built-in, computer-grade, power purifying isolation transformer protects the load from even the most-damaging power disturbances.
  • User-friendly status and diagnostic indicators.
  • Optional NetMinder Ethernet/MODBUS adapter for network monitoring.

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Technical Specs

  • Voltage Regulation: +/- 3%
  • Load Regulation: Typically better than +/- 3%
  • Overload Capability: 125% for 10 min
  • Surge Capability: 150% of rated output
  • Input Operating Range: +10 to -40% (typical)
  • Input Current THD: < 5%
  • K-Factor: 30 or better
  • Operating Temperature: 0°C to 40°C
  • Common Mode Noise Attenuation: 120dB
  • Transverse Mode (Line) Noise Attenuation: 70dB
  • Spike Attenuation: 3000:1
  • Crest Factor: 3.5:1

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  • Networking
  • High-Performance Workstations
  • Voice Mail / Information Technology
  • Communication Closets
  • Transmission Repeaters
  • Supervisory Control and Data Acquisition (SCADA) Systems
  • Distributed Control Systems (DCS)
  • Critical Instrumentation
  • Point-of-Sale Computers

  • Is the LT a standby UPS?

  • No. The LT uses seamless transfer, ferroresonant technology to secure optimum performance. Unlike standby systems that do nothing until power fails; the LT conditions, regulates, and filters the power 100% of the time. The load receives a steady, spike-free, sinewave voltage, regardless of whether the incoming power is in or out of acceptable range.

  • How does the LT regulate voltage?

  • The LT 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 LT delivers regulated voltage to within +/-3% without using battery power.

  • How does the LT correct for bad power?

  • The ferroresonant transformer remains in the power circuit 100% of the time. Since the transformer is designed to pass only 60Hz (50 cycles also available, if required), the power distortion of other frequencies will not be present in the output. The LT corrects for bad input voltage waveforms with distortion levels as high as 40%. Most standby UPS units will not tolerate over 7% distortion, and they switch to battery backup. The LT preserves the battery power for outages only.

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

  • The limited protection that a standby UPS offers is from its TVSS circuit. The typical TVSS protection is no more than a couple of "dime" to "nickel-sized" metal oxide varistors (MOV), with ratings of typically 6000 amps; leading one to believe that these devices will handle 6000 amps. In contrast, the LT protects the load with 15+ pounds of pure transformer steel. The transformer absorbs the high-energy transients, leaving the load solidly protected; and also replenishes the energy where notching and reverse spiking occur.

  • Does the LT improve the operation of equipment connected to it?

  • Yes. The output filter circuit removes unwanted frequencies generated by non-linear loads. This phenomena lowers the high load current demand and improves the power factor. The load draws less current and produces much less heat; increasing its efficiency and extending its life.

  • How is it that the LT corrects for ground noise, when other UPS's of similar VA sizes do not?

  • The LT uses a high-level isolation, ferroresonant transformer for power conditioning. Only an isolation transformer removes common mode noise (the noise generated on the ground lead). Most other UPS's use an auto transformer for some voltage correction functions, and ignore the need for common mode noise attenuation.

  • How does the LT correct for improper site wiring?

  • Site wiring is always an unknown. There may be voltage variations, ground current that causes disruptive operation (unsolvable with TVSS), mixed grounds, etc. The LT's ferroresonant 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 the data spike attenuation networks are at the most optimal location (the shortest lead length to ground).

  • How does the LT provide superior isolation, compared to typical units of the same size?

  • Most standby UPS systems just pass the incoming power directly to load without any regulation, power conditioning, and/or isolation. The LT uses a special ferroresonant isolation transformer for power purification and isolation. The LT isolates power, even when operating on battery.

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

  • Yes. The LT's ferroresonant transformer acts as a band pass filter, allowing only 60 cycles to pass (50 cycles also available, if required). Load-generated noise and harmonics are trapped in the output of the LT, preventing the unwanted harmonics from reaching the input power source. Standby UPS's simply don't correct for harmonics.