3-phase boat-single phase dock? Atlas system.

An Atlas system (or A/Sea) isn't cheap...if the dock belongs to the boss, why not have the electric company run 3-phase out to the dock...will wind up being a lot cheaper if it's the only place you'll need the conversion.

"Atlas supplies, to the yachting community, solid-state frequency converters from its ShorPOWER product line as a means of achieving clean and reliable onboard power from a dockside connection -- anywhere in the world. This conditioning of dockside marina power can be done without any type of power interruption. With a ShorPOWER installed on your yacht, if you choose correctly, you'll never again be concerned about whether the dockside power is 50 Hz or 60 Hz. It won’t matter if the available dockside voltage is 208 volts, 240 volts, 380 volts, 480 volts, single-phase or three-phase. That's because the ShorPOWER frequency converter product line offers automatic conversion of any dockside power source, anywhere in the world, into power tailored to your yacht's specific electrical requirements."

There are basically two questions.

Which system is installed? (And does it work?)
-> Atlas makes quite a few different systems. The guess in this thread is that it's a ShorPOWER system. There are several, each has it's own requirements starting with basic things like input voltage range, number of input phases and power requirements.
It is necessary to find out what the installed system can do, for example some of the large ones require 3 phase input.

Can the single phase line supply enough power?
-> Depends on the installed system. May lead to power usage restrictions. Which may be acceptable or not.

I would guess that, even though the Atlas system will work with your single phase power supply, there won't be enough amperage to run the boat.

I had a 3-phase 408v line run to my boss' dock, and I think it ran about $15-$20k through FPL (I assume you're in Daytona). The real kicker is that FPL won't treat it as a residential service and charges us commercial rates. We average $100/day on a 145'.

Hi,

Whatever single phase current supply you can get will need to be divided by 3 to get your phase current.

If you have a 100a single phase setup you will get approx 30 amp per phase.

If you vessel needs 100A 3ph and you can supply 300a Single phase you should be ok mathematically just not sure about the hardware for a single phase connection like that

Sorry- that should have said 480v

??

The boat requires a certain amount of power. If the shore power plug can handle 100A at 120VAC single phase it can supply about 12kW. That same amount of power can be delivered by slightly more than 18A by a 480V 3 phase supply.

If the supply can provide 480V 3 phase you can get about 98kW through that plug at 100A.

The above figures are based on a .8 power factor.

And for the record, you don't add the current of each leg in a 3 phase circuit. What goes up one leg goes down the other two in a balanced circuit.

Why would there be a pissing contest, this is just math and physics, not opinion.

If the shore power supply is 220V single phase then just double the power that is available from that 100A single phase source. You have about 24kW instead of 12kW for the same current as the 110V source.

If you get your phases wrong your motors turn backwards, nothing more nothing less.

I'm glad I came across this thread, I plan on putting in an Atlas system into the new build, but I am a complete Moron when it comes to electrical systems. Although I intend on acquiring some level of knowledge during the build, I would like to install a seamless system that would regulate amps and sine waves from shore power,(which Atlas does) but also automatically kick on the generators when required, and also start the other gen set to allow better energy management.....does such a system exist?

I'm hoping all of you along with Captholli will weigh in on this.

Be careful who you ask about what.

The folks at Atlas will be very happy to provide you with reliable information. You might want to take a run up to their office and have a chat. It will be well worth your time.

Thanks, I will. I actually sat next to the President of Atlas at the Bimini Boatyard after walking the docks at the Ft. Lauderdale boat show a few years ago, and bought him a couple of drinks. I have his card somewhere, and fully intend on paying them a visit.