Selecting an appropriate Galvanic Isolator and installing it is a simple process. The device is installed in series in the safety grounding conductor on the boat, usually near the main shore power panel. Please see the schematic below for more detail.

Typical Product Selection

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. In order to select the best product for your vessel you must know the size of the shore power service on your boat and choose the Galvanic Isolator accordingly. In some cases, one unit can be used for dual shore power services (such as the GI-50/60A devices, which can be used for dual 30A shore power services.

Fail-Safe Plus and Fail-Safe MAX

DEI offers two versions of the GI-30A and GI-50/60A products, designated by Fail-Safe Plus (FSP) and Fail-Safe MAX (FSM). Fail-Safe Plus models meet the requirements of ABYC A-28 for fail-safe galvanic isolators, while the Fail-Safe MAX versions offer even more robust performance. Fail-Safe MAX products have fault current ratings so high, that the ground wire would melt before the product will fail. The choice between these two models can be made at the customer's discretion.

If assistance is required to determine whether these ratings are adequate for your application, contact Farwest for assistance, or visit our Alternate Product Selection page.