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• Products   30 Amp GI   50/60 Amp GI   100 Amp GI   200 Amp GI  • Product Selection • Resources • Catalog • Contact         Products   Products Overview  Overview All DEI Galvanic Isolators (GI) are fail-safe, solid-state DC isolation/ AC coupling devices with ratings and characteristics that significantly exceed those of all known galvanic isolators designed for marine applications. The proven fail-safe construction assures that the galvanic isolator never compromises the integrity of the grounding conductor, even in the unlikely case of the product failing. ABYC Certified In the marine industry, the criteria for galvanic isolators is defined by the American Boat and Yacht Council (ABYC) recommended standard A-28, which has recently been revised. This standard has a publication date of July 2008 and an effective date of July 2009. Due to recommendations to the A-28 galvanic isolator standards committee concerning the need to retain safety grounding under all conditions, as required by the U.S. National Electric Code for all similar applications outside of A-28, this standard now makes provision for fail-safe galvanic isolators. To be considered "fail-safe," an independent laboratory must confirm that the isolator will either remain fully functional or remain a permanent, effective grounding path if it fails when subject to the maximum current rating. Per the new A-28 standard, galvanic isolators meeting the fail-safe requirement will not require a monitoring system since the integrity of the grounding wire will not be compromised should the isolator fail. All galvanic isolators not meeting the fail-safe criteria will still require a monitoring system to alert the boat owner that their grounding system may be compromised. Fail-Safe Plus and Fail-Safe Max Technology DEI offers a Fail-Safe Plus (FSP) or Fail-Safe Max (FSM) model for each rating except for the 100A and 200A models for which only the Fail Safe Max model is offered.  Fail-Safe Plus models not only meet the fail-safe test criteria in the new A-28, but also have considerably higher fault current ratings than are required and have very substantial lightning current current ratings, which are not even required by A-28; hence, the "Plus" designation unique to DEI. Fail-Safe Max models provide even higher AC fault ratings than Fail-Safe Plus models and will still be fully functional when tested to the A-28 fail-safe fault criteria, thereby providing the ultimate in performance; hence, the "Max" designation.  The FSM models will fail in the safe mode, at a level in excess of the A-28 fail-safe definition - a point at which the grounding conductor would have previously failed.     Features and Characteristics • Features and Characteristics • Fail-safe construction featuring Fail-Safe Plus™ and Fail-Safe Max™ technology • Certified to ABYC A-28 July 2008 publication • Highest AC fault current ratings available • Ignition protected • Maintenance-free solid-state design • Rated for high levels of lightning current • Isolation to 1.1V galvanic potential difference • Very low DC leakage current allowed   Click here for more info!