Old motor efficiency data 5

[SarahJane]

Hoping someone can help me.
I am looking at payback periods on some old motors ranging from 15 – 50 years old, I want to know where to find the efficiency of old motors on line, the oldest record I could find was 1982 which is fine for the younger motors, but does not help me much with the really old ones. I would appreciate any links or information that may help me.

 

[TD2K]

http://webbooks.net/freestuff/motor_selection.pdf

Page 21 has some data but not broken down into motor Hp ranges.


Have you asked the motor suppliers? I would suspect while it might not be something they publish because of low demand they should have something to provide to you.

 

[SarahJane]

Thanks for the info printing now

 

[SarahJane]

Still open to other info if anyone has some

 

[ScusaMe]

Check with USDOE (Department of Energy)

and

NEMA (National Electrical Manufacturers Association)

GOOGLE .....

/'ScusaMe

 

[electricpete]

As Scusame mentioned, US DOE compiled software called motormaster which is supposed to have a lot of motor data in it. I don't know how far back out goes, but I'd check there.



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(2B)+(2B)' ?

 

[purplepete]

I have some old Crompton (UK) and Simpson (Australia) early motor catalogues boxed up in my garage. Let me know if you want me to look for them I can scan and post. But, they are for 415 Volt squirrel cage 50 Hz machines.

 

[SarahJane]

PurplePete, that sounds great!!! what year are they do you know? I am hoping to get info from the 60's and 70s

 

[purplepete]

I'll dig it out and let you know and/or scan and post it up for you.

 

[purplepete]

SarahJane, I've dredged the files and come up with performance data on a limited number of motors only (I must have had more of a clean-out than I remembered):
Three data sheets are from a Simpson-Pope Motors (Australia) range tabled in about 1981 but originally put together in 1976. Apologies to the guys if I've breached copyright or other.
The Australian Standard AS1359:1974 applied at that time for motor performance (incl efficiency).

An AEI Engineering(UK and Australia) motor brochure/specification sheet from about 1964 shows only that the performance complied with BS2613 (British standard).
Several of their catalogues say the same thing you see on the attached AEI motor brochure (it's the first page only of a several in the catalogues)
This was the way many motor catalogues presented their performance data in the 1960s, 70s and 80s.

If you are comparing motors to evaluate replacement NPV's it is probably safe to work using the engineering standards for efficiency as they applied at the time of motor manufacture.
I've done it a few times in the past, most successful is the replacement of a failed motor with a modern high- (or higher-) efficiency motor. That's where a contingency plan should be in place and a ready source of replacement motors.
I've uploaded 4 files. If it's crashed I'll have another go.

 

[purplepete]

Sorry, here's another

 

[purplepete]

And another

 

[purplepete]

And the last

 

[SarahJane]

Thanks so much Purple Pete these are great!!!