Off topic...Phase 3 converter
- Thread starter 1shot
- Start date
We use an 11 HP Roto Phase to power are 3 phase machines.
A bit much for your application though, One mill we picked
up had a very small converter box installed but just could'nt
meet the power draw demand when cutting heavy in back gear.
The mill in my avatar is the one that smoked that box. Is the
grinder set for 240v or 480v ??
A bit much for your application though, One mill we picked
up had a very small converter box installed but just could'nt
meet the power draw demand when cutting heavy in back gear.
The mill in my avatar is the one that smoked that box. Is the
grinder set for 240v or 480v ??
Last edited:
jghoghunter
Gold $$ Contributor
My suggestion is look for a local reputable shop close by. Ask them if they can build you one. They can usually be built for 2/3 or less the cost of commercial bought ones. We have six of them between three commercial grade cabinet shops all of them built by the same guy haven't had a lick of trouble with any of them. The cost was much less compared to commercial bought ones. Just another avenue to look for.
I'm guessing your meat grinder is going to be less than three hp. You can check the badge and see if it' is 220V. It should be unless it is a giant industrial size. You can get a decent VFD pretty reasonable. Installing it will be another thing if you aren't familiar with (electronomy). You can also contact someone like WNY or Anderson and get a reasonable RPC and wire it to a poly phase circuit and power more than just that one machine. If you are going to use a static converter you might consider getting a substantially larger one. They do not have the output requirements for full power loads, 1/1
ckaberna
Gold $$ Contributor
I bought an American rotary 5hp about 10 yrs ago and have had no issues. The cost wasn’t too bad im thinking $500-600 shipped to the house. I installed myself so no cost there. I have it wired to lathe, mill, drlll press, grinder & a bandsaw. If there is a possibility of getting other 3P equipment I strongly recommend a rotary.
butchlambert
Site $$ Sponsor
Pictured is a VFD. I would check EBay or Amazon for a VFD. Rotaries are much larger physically and noisy. I have 2 rotaries and 2 VFDs in my shop and the rotaries and air compressor are located outside my shop.
urbanrifleman
Site $$ Sponsor
For my Logan 5 hp lathe I bought the unit from Grizzly and it works perfectly.
Dusty Stevens
Shiner
Ebay, static converter. The one preacher showed is on there for $135 or best offer
wkdickinson
Gold $$ Contributor
I bought a cheap Chinese VFD off eBay about 3 years ago for a 2"X72" belt grinder I was building. The motor on it is a 2 hp 3-phase inverter type. I paid about $85 for the VFD and it has worked flawlessly. In the spring of 2020 I rebuilt a 1950's era Rockwell drill press and changed the motor from a 3/4 hp single-phase to a 1 hp 3-phase. I bought the VFD for this one from Amazon. It is from the same manufacturer as the one off eBay, but a different model and was about the same cost. It also works great and gives REALLY nice added functionality to the drill press.
I've read many warning on various forums about buying these cheap Chinese built VFD, especially about the poor documentation. My experience doesn't support that. I agree the documentation leaves a lot to be desired, but if you have some electrical knowledge it's not hard to figure out, at least for simple programing. However, if I was trying to earn a living using these tools, I would have opted for a name brand.
urbanrifleman
Site $$ Sponsor
Grizzly G5843 - Static Phase Converter - 3 to 7 HP - Grizzly Industrial, Inc.
Using patented solid-state starting relays, these Autogen Static Phase Converters allow you to operate moderate 3-phase loads on a single-phase circuit. Provides instant reversing and full-time 3-wire power on motors operated at 70% continuous HP or 90% intermittent-duty (15 minutes or less with...
www.grizzly.com
I am pretty sure this is made in Missouri.
1shot
Gold $$ Contributor
I know that the grinder unit is a 3 phase, 7.5 HP, 208V unit. I am the dumbest person on the block when it comes to electricity. I know that it can kill you, and I know how to pay my bill, that's about the extent of it. Fortunately, I know a good electrician, but he doesn't know much about which converter is best suited to my needs, and that is where I need help. I will try and answer some of your questions below. Do
Q
o you want to vary the speed or just have 3 phase?
A: I just want 3 phase that runs the grinder a full power.
Q: Static or VFD?
A: I have no clue, but it does look like the static converter either doesn't handle what I have, or does so at 70% which isn't desirable to me.
So, it looks like either a VFD or a rotary are my options.
Lloyd
Q
o you want to vary the speed or just have 3 phase?A: I just want 3 phase that runs the grinder a full power.
Q: Static or VFD?
A: I have no clue, but it does look like the static converter either doesn't handle what I have, or does so at 70% which isn't desirable to me.
So, it looks like either a VFD or a rotary are my options.
Lloyd
itchyTF
Gold $$ Contributor
Try calling American Rotary and see what they say. Obviously they will be biased toward RPCs but wouldn't hurt to get some info. Mine is an AD5 which cost me around $600 at the time.
If you're not electronically or computer inclined programming a vfd might be frustrating. Most of the stuff probably wouldn't need programming plus customer service might help telling what you would need to do.
Does your motor have a 240v option?
If you're not electronically or computer inclined programming a vfd might be frustrating. Most of the stuff probably wouldn't need programming plus customer service might help telling what you would need to do.
Does your motor have a 240v option?
Dusty Stevens
Shiner
Being a 7.5hp unit id go with a rotary. 3hp is my max personally on single phase converted without a rotary
Upgrades & Donations
This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.