motor starter question

[Cord]

I have a single phase 220v motor that I need a starter for. I'd like to have the starter be controlled by a remote switch. At this time I'm not certain if the switch will be momentary or latching. I'd also like the starter to have a disconnect built in so I can kill the power allowing me to work on the machine safely. Per the motor tag it will pull 20.5 amps, so I believe I'll need a 3 phase starter that is rated for 35+ amps. I'm on a budget so I'd like to buy a used starter off of ebay, but I'm not sure what I'm looking for - there are too many options.

The motor has a thermal reset built into it, so does this mean I can bypass the starter heaters?

This one is available locally, would it work? Motor Disconnect Starter - general for sale - by owner

 

[MossRoad]

Why do you need a 3 phase starter for a single phase motor? Just curious as to the use. Thanks.

 

[ch1ch2]

Why do you need a 3 phase starter for a single phase motor? Just curious as to the use. Thanks.

That is my thought too.
How did you jump from 220v to 3 ph.

 

[rodnok]

I have a single phase 220v motor that I need a starter for. I'd like to have the starter be controlled by a remote switch. At this time I'm not certain if the switch will be momentary or latching. I'd also like the starter to have a disconnect built in so I can kill the power allowing me to work on the machine safely. Per the motor tag it will pull 20.5 amps, so I believe I'll need a 3 phase starter that is rated for 35+ amps. I'm on a budget so I'd like to buy a used starter off of ebay, but I'm not sure what I'm looking for - there are too many options.

The motor has a thermal reset built into it, so does this mean I can bypass the starter heaters?

This one is available locally, would it work? Motor Disconnect Starter - general for sale - by owner

Just from reading your query I can tell you do not have the knowledge to do this yourself. Save yourself some headaches and possibly some severe injury by hiring a licensed electrician to do this job.

 

[Stimw]

I have been controlling a 5 hp single phase 240 volt 23 amp 2 stage compressor with a 30 amp breaker for over 30 years.
No motor starter in the circuit.
Have used compressor for hours daily in my business until I retired a year and a half ago.
I used compressor today to blow off Zero-turn mower after cutting grass.

 

[jaxs]

I think he's talking about an inductive pick up relay coupled with capacitor for hard start. Same principle as capacitors commonly used on electric motors except this configuration drop's out when motor amps drop after starting. Deffinatly should have a pro hook it up.

 

[LouNY]

I have a single phase 220v motor that I need a starter for. I'd like to have the starter be controlled by a remote switch. At this time I'm not certain if the switch will be momentary or latching. I'd also like the starter to have a disconnect built in so I can kill the power allowing me to work on the machine safely. Per the motor tag it will pull 20.5 amps, so I believe I'll need a 3 phase starter that is rated for 35+ amps. I'm on a budget so I'd like to buy a used starter off of ebay, but I'm not sure what I'm looking for - there are too many options.

The motor has a thermal reset built into it, so does this mean I can bypass the starter heaters?

This one is available locally, would it work? Motor Disconnect Starter - general for sale - by owner

It will work, and as far as using either a momentary or maintained switch to control this I'll agree with the other poster that you may want some professional assistance on your project.

 

[mbohuntr]

You definitely need an electrician... Yes you can use a 3 phase starter, but why cobble something together. The HEATERS you describe are the thermal overload components in a motor starter bucket. No you are using a piece of this, and that to save some bucks, and not understanding much of it.. Bad combination.

Always use the breaker to safely work on it, and do a meter live dead live check before touching the wires.

A starter uses either a magnetic coil, or solid state circuitry to close when you push the button. Inside the starter, there is a switch we call an (Aux)illary switch that simply means it closes when the motor starts and creates a "seal-in" to latch the motor on. When you push the "off" button, you monentarily cut the power to the switch, opening it up.

Bottom line, GET AN ELECTRICIAN to put a push button rocker switch, or disconnect switch in line and call it good.

https://2.bp.blogspot.com/-w7qCggwb...wiring+with+contactor+and+circuit+breaker.JPG

http://ecatalog.hubbell-wiring.com/ProductInformation/ProductThumbnails/1000x1000/3A/HBLDS6.jpg

 

[LouNY]

The nice thing about using a starter such as the one linked to is the mechanical disconnect which can be padlocked in the off position, which is more secure then turning a breaker off. Also even though it's rare I have had multi-pole breakers hang a leg and stop 220 volt applications but leaving one leg of 110 on the system, makes for a sudden awakening when working on it.
Breaker lock-outs are available but I expect that very few individuals have them and even fewer use them.

 

[mbohuntr]

The nice thing about using a starter such as the one linked to is the mechanical disconnect which can be padlocked in the off position, which is more secure then turning a breaker off. Also even though it's rare I have had multi-pole breakers hang a leg and stop 220 volt applications but leaving one leg of 110 on the system, makes for a sudden awakening when working on it.
Breaker lock-outs are available but I expect that very few individuals have them and even fewer use them.

We see breakers with a hot leg frequently.. some loads simply do not get their breakers cycled like they should. I always check it dead anyway, it's a habit I like to keep..