Boats, DC, Galvanic Corrosion, Marine -

Galvanic corrosion is caused by an electric current that enters a boat via the shore power earth wire and returns back to shore via the water. These galvanic currents can cause corrosion to the boat’s underwater metals, like the hull, propeller, shaft and so on. Galvanic current is a DC current and is caused by the natural voltage difference between metals. If a boat with a metal hull is near the shore, a natural voltage difference of 0.1 - 1 Vdc exists between the hull and the water. Galvanic corrosion can be prevented by anodes, galvanic isolators or isolation transformers.

Read more

DC, Fuse, Sizing -

DC Fuses and how to size them.What is a Fuse?A fuse is an electrical safety device. It protects an electrical circuit against high currents. The fuse is placed in the supply cable to an electrical device. As soon as current flows through the fuse that is higher than its current rating, for a certain amount of time, the fuse will blow. Once the fuse has blown, no more current will flow into the circuit.Higher than expected current situations can occur when...

Read more