Frequently Asked Questions
What model Galvanic Isolator do I need?
DEI Isolators are typically applied using an industry standard method of matching the device to the steady-state current rating of the shore power service. DEI Isolators are offered in 30A, 50/60A, and 100A ratings. For dual 30A services, one 50/60A DEI Galvanic Isolator can be used in place of two 30A units. For a more detailed method of sizing your Galvanic Isolator, please visit our Product Selection Guide.
What does the term "fail-safe" mean?
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 capability of the grounding conductor for a given galvanic isolator current rating. This provides guaranteed safety grounding, even when the product is failed, thus the "fail-safe" designation.
What is the difference between Fail-Safe Plus and Fail-Safe MAX?
All DEI GIs are categorized as either Fail-Safe Plus® (FSP) or Fail-Safe Max® (FSM). Fail-Safe Plus models not only meet the fail-safe test criteria in the proposed revision to A-28, but also have considerably higher fault current ratings than are required and have substantial lightning current current ratings, which are not required by A-28; hence, the "Plus" designation unique to DEI.
Fail-Safe Max models provide even higher performance than Fail-Safe Plus models in that they have all of the "Plus" ratings and will still meet all other requirements of A-28 after being subject to the fail-safe test criteria, thereby providing the ultimate in performance and safety grounding; hence, the "Max" designation.
Do DEI products meet ABYC A-28 standards for Galvanic Isolators?
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. 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 Electrical Code for all similar applications outside of A-28, the new revision of this standard now makes provision for fail-safe galvanic isolators, which guarantees the isoloat will never compromise the ground. DEI Galvanic Isolators have been tested to meet or exceed all requirements of the revised ABYC A-28 for fail-safe galvanic isolators.
Do DEI Galvanic Isolators need a monitoring system?
No. According to the revised ABYC A-28, any isolator meeting the fail-safe criteria will not require a monitor. Isolators not meeting the fail-safe requirement in the revised ABYC A-28 will still require a monitor.
Since DEI Galvanic Isolators are tested to meet and exceed all ABYC A-28 standards, monitoring is not required.
How do I register on the DEI website?
Registration is quick and easy and will allow you full access to all DEI product data and technical information. You can register by visiting our registration page and filling out the form. Upon completing the registration form, you will be sent a confirmation email, which will contain a link used to activate your registration. After you've activated your registration, you can log in using the login feature located on the upper right hand corner of each page on the DEI website.
What do I do if I've forgotten my username and password?
At the login page there is an option to have your credentials sent to the email address that you registered with. Click on that link for further instructions.
Additionally, you may contact the DEI office directly and request your username and password.
What do I do if I don't find what I'm looking for on the DEI website?
Please feel free to send your request to us through our Contact Page, or by contacting us directly.
Can I purchase DEI products online?
No. Unfortunately, due to the technical nature of our products, we are not able to offer online shopping at this time. If you'd like to purchase DEI products, please contact our office directly.
How can I purchase DEI products?
DEI products are available for numerous industry distributors throughout the world. Please feel free to contact DEI at any time for distributor information or to purchase directly.
What do I do if I'm having trouble downloading product literature off of the DEI website?
In order to download literature from the dei website, you must be a registered user, and be logged into your account. If you are having trouble downloading, please be sure that you are logged in.
Additionally, our literature is all available in .pdf format. In order to open these documents, you will need Adobe Reader installed on your computer. Adobe Reader is available free of charge from Adobe products, and can be downloaded by clicking on the following button.
If you are still experiencing problems, please contact the DEI office for
assistance, and to request that the literature be mailed to you.
