Motor starter for 5hp single phase

[yelchevelle]

I have a Quincy 240 that I am putting a magnetic starter on. I have a NOS cutler hammer nema size 1. Says NO A10CG0. I am going to be honest in the fact that I have no idea how the mag starter actually works. This is a 3 phase starter, but I need to wire it up single phase 240 volts. I understand the principle, but not actually what’s going on. For the time being, I want my pressure switch to be wired into it, plus some kind of toggle switch to cut it off when I don’t want it live (so I don’t have to cut off the breaker. Long term, I want to also have the power cut off to it when I turn off the lights so that it only runs when I am in the shop(lights are on). I have seen other threads discussing what I want to do, but I don’t want to let the magic smoke out of any of my electrical components.

 

[nadogail]

I have a Quincy 240 that I am putting a magnetic starter on. I have a NOS cutler hammer nema size 1. Says NO A10CG0. I am going to be honest in the fact that I have no idea how the mag starter actually works. This is a 3 phase starter, but I need to wire it up single phase 240 volts. I understand the principle, but not actually what’s going on. For the time being, I want my pressure switch to be wired into it, plus some kind of toggle switch to cut it off when I don’t want it live (so I don’t have to cut off the breaker. Long term, I want to also have the power cut off to it when I turn off the lights so that it only runs when I am in the shop(lights are on). I have seen other threads discussing what I want to do, but I don’t want to let the magic smoke out of any of my electrical components.

I can come over and have a look at your problem. Are you within a reasonable distance to Coronado?

 

[yelchevelle]

Sorry

I can come over and have a look at your problem. Are you within a reasonable distance to Coronado?

Sorry, unless you live on Coronado dr in Hoover, AL, you are a plane ride away. I got excited, because Coronado drive is really close to me, but I then looked at your profile and saw the CA followed your Coronado.

 

[nadogail]

My apologies for not knowing your location.

 

[yelchevelle]

My apologies for not knowing your location.

No apologies necessary, you were trying to be helpful. I should have included that in my post.

 

[Norcal]

A NEMA size 1 starter is too small for a 5 HP single phase motor, good for 3 HP though, while those Cutler-Hammer Citation starters are my favorite, they are obsolete & have been since around 1994-95. Your going to need a different starter.

 

[CGT80]

What is the amperage of your 5hp motor? They are not all the same. My 5hp baldor pulls as much as a new 7.5hp baldor.

I used a WEG 7.5hp single phase magnetic starter with a variable safety. It covers my 5hp motor and would allow me to upgrade to a new 7.5 if I decided to go bigger, but It may not work on a newer 5hp.

Amazon had many listed last year, but how it looks like Eaton is listed with no information on them and much higher prices, but the housing and internals look the same.

My motor is 28.5 amps with a 1.15 service factor. It can draw up to 32.77 amps and last I checked it was pulling around 27 amps when it shut off. A new motor is around 24 amps name plate.

The one problem I had with the adjustable is figuring out where to set it so it is low enough to protect my motor but not trip with high usage in the middle of a cnc plasma cutting session. I kind of guessed as I don't recall it tripping even on the lower settings. The markings are not that fine, so there is a little guessing.

I didn't want to break the bank on a starter and it seemed easier to use an adjustable unit.

Maybe someone has advice for properly setting that style. Is it super critical?

 

[yelchevelle]

What is the amperage of your 5hp motor? They are not all the same. My 5hp baldor pulls as much as a new 7.5hp baldor.

I used a WEG 7.5hp single phase magnetic starter with a variable safety. It covers my 5hp motor and would allow me to upgrade to a new 7.5 if I decided to go bigger, but It may not work on a newer 5hp.

Amazon had many listed last year, but how it looks like Eaton is listed with no information on them and much higher prices, but the housing and internals look the same.

My motor is 28.5 amps with a 1.15 service factor. It can draw up to 32.77 amps and last I checked it was pulling around 27 amps when it shut off. A new motor is around 24 amps name plate.


Maybe someone has advice for properly setting that style. Is it super critical?

My name plate says it’s pulling 21 amps at 230 volts and 23 amps at 208 volts. My power runs a touch over 240. I thought going by the starters chart and the motor plate that 1044 on the low side were the correct size for the heaters. I have not checked the amps while running. My 3hp says 19 amps at 230 volts. Main reason I am wanting the starter is to keep from having all the power run through my switches. The Quincy has factory unloaders and the motor would probably be fine without a starter.

A NEMA size 1 starter is too small for a 5 HP single phase motor, good for 3 HP though, while those Cutler-Hammer Citation starters are my favorite, they are obsolete & have been since around 1994-95. Your going to need a different starter.

I am asking this because I don’t know, but is the chart and rating on the starter only for 3 phase, because my motor says it is pulling 21-23 amps, and the chart with the starter says it can go all the way up to 27 amps with the correct heaters

Edit: I guess the sfa are 25, so does that mean I need 1045 heaters?

 

[Norcal]

My name plate says it’s pulling 21 amps at 230 volts and 23 amps at 208 volts. My power runs a touch over 240. I thought going by the starters chart and the motor plate that 1044 on the low side were the correct size for the heaters. I have not checked the amps while running. My 3hp says 19 amps at 230 volts. Main reason I am wanting the starter is to keep from having all the power run through my switches. The Quincy has factory unloaders and the motor would probably be fine without a starter.



I am asking this because I don’t know, but is the chart and rating on the starter only for 3 phase, because my motor says it is pulling 21-23 amps, and the chart with the starter says it can go all the way up to 27 amps with the correct heaters

Edit: I guess the sfa are 25, so does that mean I need 1045 heaters?

A size 1 starter is 3 HP single phase at 240V, MAXIMUM the amperes do not matter.

 

[fitter30]

Just power L1 and L2 leave L3 empty. It will still the overload heater installed to work. Heaters need to resized just purchase 2 #1044 L3 doesn't care about the size since it's not protecting anything. If you can used ones don't be afraid to buy them. That starter is old school and very well made compared to what is out there now

 

[Norcal]

Just power L1 and L2 leave L3 empty. It will still the overload heater installed to work. Heaters need to resized just purchase 2 #1044 L3 doesn't care about the size since it's not protecting anything. If you can used ones don't be afraid to buy them. That starter is old school and very well made compared to what is out there now

So a undersized starter is OK?

 

[wyliesdiesels]

Just power L1 and L2 leave L3 empty. It will still the overload heater installed to work. Heaters need to resized just purchase 2 #1044 L3 doesn't care about the size since it's not protecting anything. If you can used ones don't be afraid to buy them. That starter is old school and very well made compared to what is out there now

Bad advice

And if it has phase loss protection then it wont work when leaving one terminal unused...

 

[fitter30]

Bad advice

And if it has phase loss protection then it wont work when leaving one terminal unused...

Doesn't have phase loss just amperage. Wouldn't doubt that starter is 20 years old or more. What is so great about these starters coils, contacts, aux switches and overloads are changeable. Aux switch has n.o. contacts need n.c. Take it apart flip a contact.

 

[Dagny]

run line 2 through the 3rd pole again.

 

[Norcal]

Doesn't have phase loss just amperage. Wouldn't doubt that starter is 20 years old or more. What is so great about these starters coils, the contacts, aux switches and overloads are changeable. Aux switch has n.o. contacts need n.c. Take it apart flip a contact.

Try more, it was discontinued after Eaton bought the distribution & controls div of Westinghouse in the mid 1990's, Not sure if Eaton still supports the Citation starters. The minimum is NEMA size 1 1/2 for 5 HP 1Ø motors.