Stray ($29.99) is a puzzle-adventure game with platforming elements that delivers an utterly charming protagonist, set within a quirky and fascinating setting. All while playing an adorable bundle of fur trapped in a quirky robot-populated undercity, unraveling the mystery behind the disappearance of mankind. Climb to places you were never intended to reach. Visit their website and blog for info and articles on marine electrical systems, projects and more: your feline fantasies! Knock coffee mugs off the table. If your boat is in saltwater, you must have some kind of protection for your onboard electrical and electronic systems, at the very least, install a fail-safe galvanic isolator on your AC shore power system.Ībout the author: Jeff Cote is the owner of Pacific Yacht Systems, a full service shop delivering marine electrical and navigation solutions for recreational boats. Isolation Transformers block all DC voltage preventing stray current corrosion and reverse shorepower polarity, They don't always survive breaker trips and active monitors are required to meet ABYC standards. Galvanic Isolators only protect up to 1.2 VDC and there are possibilities it could be higher which will allow corrosion to take place even though you have a galvanic isolator properly installed. A popular brand among boatbuilders is Charles Industries. In the future, we will see light weight, low cost power conversion systems coming to market that comply with all the safety requirements of the existing heavy and expensive isolation transformers. Recent changes to ABYC E-11 AC and DC Electrical Systems for Boats now permit the use of high frequency transformers allowing manufacturers to build smaller and lighter transformers for pleasure craft. A typical 120V/30A transformer can weight almost 100 pounds while a typical 240V/50A unit almost 300 pounds. They are also made of significant amounts of iron and copper, both of which are not light materials. However, when it comes to corrosion, Isolation Transformers block all DC voltage differences and also address reverse polarity issues. Specific isolation transformers can raise the shore voltage to deal with voltage drop and can be used to adapt the vessel’s internal power system voltage to a higher or lower shore power supply. There is no downside to an isolation transformer besides weight, space, and cost. Typically, Isolation Transformers are common with production boats that have a lot of underwater metals to protect and the builder can afford both the weight, space, and the cost of the unit. We recommend the Promariner Prosafe Available in 30 or 50 amp models. A failed isolator will no longer protect against corrosion, but will keep the critical AC fail-safe intact. A “fail-safe” galvanic isolator is slightly more expensive but comes with the assurance that if something goes wrong with the isolator, it is designed to always maintain the grounding connection. Losing an AC safety ground is a very serious safety concern to boaters and should always avoided. Older galvanic isolators and non-“fail-safe” isolators typically disconnect the AC ground when they fail, again removing the AC safety protection. It is important to use “fail-safe” galvanic isolators. A while back, the American Boat and Yacht Council (ABYC) stipulated that Galvanic Isolators include a monitor. The device will block up to 1.2 VDC potential between shore power ground and boat/ ground. In the past, these units would have to be tested manually so you could never be certain that they were working. It breaks the corrosion current path and isolates your boat, preventing some sources of corrosion, while keeping the safety grounding connected. This will block all low voltage DC current from flowing in the shore power safety ground wire. The most common method is to install a Galvanic Isolator to the shore power safety ground (e.g. Isolation Transformers are far more expensive and very heavy but rarely fail. Galvanic Isolators are inexpensive and simple to install but could fail thus requiring regular checking. There are two choices, a Galvanic Isolator or an Isolation Transformer, so what is the difference? To protect against the damaging effects of galvanic corrosion between your boat, your neighbor’s boat and the marina, you require some method of “isolating” your boat. If you are in a saltwater marina and have shore power on your boat to charge your batteries, then this Hotwire is for you. Protecting Your Vessel from Stray Current Corrosion
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