Magnetic Starter

[leeko]

Hi all,I have a 2hp 220v GE motor with an FLA of 11.5a at 220v, and a NEMA size 0 single phase Furnas magnetic starter (cat number 16cc104408a) that I believe is appropriate. I was hoping to ask a couple questions for my own education. Most likely, I'll hire someone to wire this up for me but I do like to try to understand this as much as possible first. Please bear with me!

I haven't found much info on this model starter online.*@#$

- the heater chart on the enclosure is for non-compensated standard trip relays, but the relay sticker says "non-ambient compensated". Do I need a different chart to figure out the correct size of heater? (If anyone can point me in the right direction, much appreciated!)

- the part of the starter that surrounds the coil is loose and slides back and forth about 1/2". I believe this is normal, and this forms the mechanical portion of the switch (actuated by the coil/magnet). But, I need to verify this as I haven't used a mag starter before!*@#$

- the labels on the terminal block are a little funky. There is an L2, but I don't see an L1. Next to L2, the label looks like "1L1". Is this L1?

- Also, there is a wire running from L2 to one side of the overload relay. I thought L2 should be input?*@#$

- It looks like the coil is currently wired for 220v based on the diagram on it. But, there is an unlabeled terminal (bottom center on the terminal block) that's wired into one side of the relay, and a red wire coming from "V" that currently doesn't go anywhere.

Thanks in advance,

Lee

Heater chart - wrong one for this relay?

Coil label reads: 110-220V 50-60 cycles D50833-91 Coil

Thanks, Lee

 

[wyliesdiesels]

Yes, the contactor assembly should have some free play. This is normal.

The wire running to the overload relay is correct. The other end of the overload relay should go to the other side of the coil so that if the heaters overload, then they will open the coil and thus shut the motor off!!

I wont be of much help for this specific starter as i dont know this model.

 

[Charles (in GA)]

What are you using this motor for? and does it have a thermal overload button on the end frame of it?

If it has the overload button, I really don't see a lot of reason for even using the starter. 2 hp is small enough that most pressure switches, and other kinds of switches, will be able to handle the current with no problem. If the motor does not have a thermal overload button built into it, then the starter may be needed.

If you do use the starter, do you have the correct heater? The E49 heater installed is not sufficient for the motor. You would need a E53 heater to properly protect the motor. With the E49 it is possible you will experience nuisance trips of the heater, depending on the normal operating amps of the motor.

Charles

 

[leeko]

Hi Charles,

The motor is on a metal lathe, and does not have a thermal overload.

You are correct that the e49 heater is insufficient - in my original post, I had asked about whether I should use a different heater chart for the compensated relay. The chart inside the starter cover is for non-compensated relays, but the sticker on the relay says compensated. That being said, the Siemens/furnas documentation I've found suggests a red reset switch (which I have) means I can use the non-compensated heater chart.... confusing.

Lee

 

[Charles (in GA)]

Hard day at work, sorry I missed your original info on the heater when I read it the first time.

That is a very old starter unit. Did anyone notice the text on the label inside the cover? "When in urgent need of heaters, contact your local dealer, if not available wire collect (15 words or less) meaning, a Western Union telegram to FURNAS ELECTRIC COMPANY, BATAVIA, ILLINOIS. Heaters will be sent free of transportation charge, air parcel post, special delivery."

Of course no zip codes and not even the earlier zone codes the PO used. This is probably early 1950's or earlier. I'll bet that a bunch of the younger members of this board have never even heard of a collect telephone call, let alone a collect charge telegram. The 15 words or less statement is of course because the telegram cost was determined in part by the word count.

Charles

 

[Norcal]

It's 1960's vintage & obsolete that predates the Innova 45 starter. I prefer to scrap them as old electrical equipment is not like fine wine, it does not get better w/ age.


I do like the Furnas/Siemens ESP 100 starters, since my favorite starters are obsolete. (Cutler-Hammer, Citation)

 

[leeko]

Got it figured out, running nicely now. Thanks for the help

Lee

 

[wyliesdiesels]

Good job!!!