Westinghouse type MW overloads

[Flex]

Im looking for a chart for the older Westinghouse type MW Thermal overload relays. Cant seem to find anything here or on the internet. I was curious if maybe someone here might be able to help.

 

[Jraef]

Im looking for a chart for the older Westinghouse type MW Thermal overload relays. Cant seem to find anything here or on the internet. I was curious if maybe someone here might be able to help.

That portion of Westinghouse went to Cutler Hammer, did you try asking them?

But better yet, chuck that old relic and put in a new stand alone solid state overload relay.

 

[templdl]

You left a lot of key information in you inquiry. But, as someone who formally worked for Westinghouse I would "Assume" that you are refering to a theremal overlaod that would be used in a MV "AMPGARD" starter. Contact Eaton

Remember that the OLR is driven by CTs of eith the ratio must be taken into consideration.

 

[templdl]

This is the product that I though you may be refering to onpage 19: url]http://www.eaton.com/ecm/groups/public/@pub/@electrical/documents/content/rp48j01te.pdf[/url]

I warked for Westinghouse for 13 years and never heard of an MW overload and simply assumed that you made a typo intending to type MV for medium voltage which I then interpreted to mean that the OLR was from am AMPGARD medium voltage motor starter.

I had dealt with all sortsd of Westinghouse stuff over the years and I may still have a lot of vintage instruction leaflets in my file which I have no idea as to my I am saving them.

 

[Jraef]

You left a lot of key information in you inquiry. But, as someone who formally worked for Westinghouse I would "Assume" that you are refering to a theremal overlaod that would be used in a MV "AMPGARD" starter. Contact Eaton

Remember that the OLR is driven by CTs of eith the ratio must be taken into consideration.

No, the Type MW were a really old NEMA starter OL, from the days when they had separate 1 pole OLRs on the starter and even back far enough to when there would only be 2 OLRs on a 3 phase starter (which was outlawed in 1978). In my opinion they are way too old to keep fussing with and likely illegal now anyway. They can be used if grandfathered in, but if you move something and get it inspected, an inspector will red tag that old style anyway. Better to just modernize it now.

 

[norcal]

No, the Type MW were a really old NEMA starter OL, from the days when they had separate 1 pole OLRs on the starter and even back far enough to when there would only be 2 OLRs on a 3 phase starter (which was outlawed in 1978). In my opinion they are way too old to keep fussing with and likely illegal now anyway. They can be used if grandfathered in, but if you move something and get it inspected, an inspector will red tag that old style anyway. Better to just modernize it now.

The 1971 NEC disallowed 2 O/L's on a 3? system

 

[templdl]

Now you have my curiosity up. I'm going to have to dig in my old files as I can?t remember running across them.

 

[templdl]

You had to do it. Attached is a copy of IL 2346-7, Tyle MW Watchman Thermal Overload Relay Instructions.
I also have copies of the MW-21, MW-31, MW-41and MW-II.
This mseries appears to be from about 1955-1959.
Don't you think that this should be worth a good bottle of scotch? LOL

 

[Jraef]

You had to do it. Attached is a copy of IL 2346-7, Tyle MW Watchman Thermal Overload Relay Instructions.
I also have copies of the MW-21, MW-31, MW-41and MW-II.
This mseries appears to be from about 1955-1959.
Don't you think that this should be worth a good bottle of scotch? LOL

I am impressed. I used to keep a lot of my old stuff in a shed outside that I had used as an office for years. My wife and daughter decided I was in danger of being a "horder" after watching those stupid reality TV shows and they purged most of my old catalogs and data sheets one weekend when I was on the road. I have yet to forgive them for that.

 

[Jraef]

The 1971 NEC disallowed 2 O/L's on a 3? system

Thanks, I wasn't exactly sure of the code change year. I was an apprentice in 1978 and my first industrial job was changing out a bunch of old A-B starters that had two OLs to ones with three in an MCC that was being moved to a different section of a US Steel plant, because of the "new" code change. I guess "new" was a relative term for them. Or maybe California didn't adopt the 1971 code for a few years, it's still like that now with about a 3 year lag.

 

[templdl]

I agree with the hording issue. One gets caught up with destroying the documents vs if I do I have no idea where there would be any other copies if I did. Then again, unless someone on the rare occassion comes up with a question such as with the MW they are worthless anyway. My old document may take up 2 file drawers at most but it's fun to surprise someone with a copy of an old document. To be truthfull, I had pulled all of my old files and put them in a cardboard box to be discarded earlier this year and thats where I dug this one out of. I just hadn't gotten around to hauling them up from the basement to putting them out for recycling.
You start out in your younger days keeping stuff because it's good stuff and usable. Then you come to realize when you are older that there isn't that much time left in your life to find time to use it anyway if even want to.

 

[ATSman]

GETTING OLDER

GETTING OLDER

I agree with the hording issue. One gets caught up with destroying the documents vs if I do I have no idea where there would be any other copies if I did. Then again, unless someone on the rare occassion comes up with a question such as with the MW they are worthless anyway. My old document may take up 2 file drawers at most but it's fun to surprise someone with a copy of an old document. To be truthfull, I had pulled all of my old files and put them in a cardboard box to be discarded earlier this year and thats where I dug this one out of. I just hadn't gotten around to hauling them up from the basement to putting them out for recycling.
You start out in your younger days keeping stuff because it's good stuff and usable. Then you come to realize when you are older that there isn't that much time left in your life to find time to use it anyway if even want to.

Templdl
Why not donate them to your local library?
I can relate to this and am also guilty of hoarding my W I.L.'s I collected in the 70's as a field engineer.
Reading your post has made me realize just how old I am and how short the time I have left.
Hell, now I am really depressed!!!!

 

[Flex]

i cant believe you had that. i had all but given up and even forgotten about this thread...that is so helpful. thank you very much

 

[Jraef]

I had fully intended to one day scan in most of my old white papers and articles from old magazines, when I had the time, which seems to be never. Oh wel...

 

[mull982]

The 1971 NEC disallowed 2 O/L's on a 3? system

I curious why did this requirment from 2 to 3 o/l's change?