Dual 8-card Shelf HVI Cabinet

The Teleline Isolator Dual 8-card Shelf HVI Cabinet Assembly, Model 751956/15 provides a safe, reliable, cost effective solution for isolating wireline communication circuits entering sites susceptible to high-voltage influences due to Ground Potential Rise (GPR) caused by lightning and/or power faults.

The Teleline Isolator offers 70kV peak, 50kVrms protection on each communication circuit, while permitting continuous communications before, during, and after a GPR event.

Product Number CLEI Code Description Download Documents
751956/15   Dual 8-card Shelf HVI Cabinet Installation Guide

Dual 8-card Shelf HVI Cabinet


This HVI Cabinet assembly provides high voltage isolation for thirty-two (32) cable pairs entering a site and features the following:

  • IEEE 487 compliant
  • Teleline Isolator 8-card Shelf, Model 751109/15, certified to Safety Standard 60950, equipped to provide integrated Span Power for ADTRAN Total Reach®, HDSL and T1 circuits when used with Span Power equipped Teleline Isolator plug-in modules
  • NEMA 4X rated non-metallic cabinet is equipped with:
    • Internal fan, with particle filter, for cooling and maintaining a positive interior pressure to minimize dust infiltration
    • Humidity sensor, thermostat and heat strip to maintain a controlled internal environment
    • AC utility power outlets
  • Entire assembly comes pre-wired to ensure dielectric separation of station and remote ground potential components, ensuring a safe and IEEE compliant installation
  • Equipment mounted on a ¾ inch (2 cm) thick plywood backboard with fire-proof paint:
    • Plywood backboard coated with fire-proof paint
    • Remote Ground Potential region designated in bright red
    • Station Ground Potential region designated in white
  • Station-side terminal block equipped with balanced, solid-state secondary protector modules
  • Connections to dedicated incoming communication cable (Remote Ground Potential) made via wire-wrap to ADC® high voltage isolation modules with looping jacks providing 20kV of isolation
    • Additional isolation jacks for circuit polarity reversal and circuit looping are provided for trouble-shooting
  • Dedicated incoming cable protected by pre-installed 15kV lightning arrestor
  • HVI assembly provided with:

Note: * For integrated Span Power applications, use power supply 751318MC or 751319MC


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