Going over the type of machine will help determine which phase converter will work best. One thing to keep in mind with an American Rotary system is, there is no harm in going with a phase converter for a larger load even if your current load does not require it.
It is better to go bigger now than find out later that you need it. Knowing where you want to place the phase converter will help determine how we tailor the phase converter to your needs. In some cases, the phase converter may need to be portable, you may need it to run multiple machines, or you may need the phase converter to be mounted in a separate location than where the machines will be running. The phase converter can be installed where ever you need it to be.
There are different options available depending on where you need the phase converter set up. The unit comes standard as an indoor unit but there are options to split the converter and have the panel inside and the idler outside, vise versa, or even the complete unit outside.
There are customers who even have the phase converter split even when installed inside. They will place the panel in one spot and the idler in another. This makes it versatile to meet any shop space considerations and environments.
Many people are taken back by the idea of an idler running to manufacture the third leg. They think it will be very loud and distracting in their shop. As this may be the case with some phase converters, that is not the case with an American Rotary Phase Converter.
American Rotary worked with Baldor to design and engineer this custom technology to have an idler that runs very efficiently, quietly, and cool. The VIT generator will operate at less than 60 Db, which is comparable to a box fan running. The idler will also operate at a cooler temperature compared to other phase converters of similar size.
The American Rotary Phase Converter is designed to withstand your typical shop environment. But we also understand that there are shops out there that produce more dirt than normal. American Rotary took that into consideration and we designed our AI-Industrial line. For additional information, see the Global Shipping Program terms and conditions - opens in a new window or tab.
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See the seller's listing for full details. See all condition definitions opens in a new window or tab. United States. Mounting Style:. The Fitch Williams design has been made in a variety of capacities. Obviously, the 5 HP or less is the easiest as the Steveco potential relay has a built-in contactor for the starting capacitor and it is rated 5 HP the General Electric potential relays are rated 3 HP. So, I would suggest taking a F. It is a fact of life that every RPC is necessarily different.
I did look up the Fitch Williams design, and found a couple of others that also gave some good ideas on where to start on determining what size capaciters to use.
Your help was greatly appreciated. I've seen Fitch's slight imbalance suggestion before. Obviously L1 and L2 are differentiated in an RPC design with a start capacitor, but what about in a design which uses a timed pony motor?
In that case, maybe imbalanced doesn't make sense? Originally Posted by metalmagpie. Ok folks, I got a bunch of caps from the surplus store, and my cabinet is almost ready to start putting rverything in place. The question that crossed my mind is: since i will be using run caps at different values to balance the phases, and will be using more than one cap on each phase, do I wire them in series or parallel? Thanks for all of the helpful replies.
I plan on installing everything in the cabinet as soon as the paint is dry. The only time you would wire these in series would be to obtain a higher voltage rating, such as would be required for a volt RPC, in which case you need capacitors rated volts, which is not anywhere near a standard rating volts is usually the maximum. Be aware that if you fry the relay contacts together and the start caps stay online sometimes they will go BOOM, they are not made for continuous duty.
I'm not sure if you could use some kind of solid state relay maybe triggered by the voltage sensing relay or not. When properly set up the normal relay will work great for a long long time, but when you are playing around getting things working you can weld the contacts on the relay together.
For just a RPC just a timer relay might work just fine too, this could be used to actuate a contacter to cut out the start caps Instead of a relay, I am going to be using a drum switch. Rotary Converter? It is a true phase converter and not a modified electric motor as most of our competitors use.
Many of our customers confirm that our rotary converters are the quietest and most trouble-free available. Simplicity of design; uses all soldered connections Keeping the design exceptionally simple reduces the risk of electrical connection failure to almost zero since these are some of the most common causes of failure.
We use only soldered connections with no mechanical electrical connections like spade clips, terminals or screws which can vibrate loose or corrode over time. There are no start capacitors, relays or contactors with connections which can come loose or arc and weld the contacts causing failure of the contactor and the start capacitors, and perhaps even the rotary converter or your equipment.
Because of this we do not have circuit board failures caused by spikes generated by the magnetic contactors as some of our competitors do.
However, some of our competitors emphasize that rotors often fail. This is because they machine standard electric motors, modifying and thereby weakening standard electric motor rotors, which were not originally designed to be used as a phase converter.
Testing before shipment Every converter is performance tested before shipment and assigned a serial number. These records are kept for review if any questions should ever arise about the performance specifications.
Warranty Repairs The most likely warranty repair would be bearings or windings, which are very rare. Failures after that are extremely rare. See MTBF below. We find that within the first 12 months approximately 1 in might have a problem, and usually within a few weeks or months.
After the first 12 months, it might be one or less in 5, over a 30 year period. We continue to hear of our Rotary Converters that have been in service for 25 or 30 years, and which are still working flawlessly. It could go on to do another 25 or 30 years. There is very little to go wrong with the Rotary Converter. Help is also available through the Sizing Assistance page. Just fill out the appropriate form and submit it to us.
You can then run additional motors not heavily loaded and not all started at the same time. A maximum of up to 3 times the HP rating of the Rotary Converter can run at the same time, if not heavily loaded, and not started simultaneously. For example, a 3 horsepower converter could run motors totaling up to 9 horsepower under the specific conditions described here.
See Installation. However, most motors will draw five times their running current during start-up. When used at its maximum HP rating the Rotary Converter cannot deliver the full 5 times starting current to the motor and therefore cannot provide full starting torque.
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