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12 comments
Active Contributor

Join Date: Oct 2009
Posts: 10

KNAN, KNAF,ONAN, ONAF

10/15/2009 11:51 PM

Dear Sir / Madam,

Good day!

1. What is meaning of KNAN and the purpose?

2. What is meaning of KNAF and the purpose?

3. What is meaning of ONAN and the purpose?

4. What is meaning of ONAF and the purpose?

Thanks,

Philip

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Guru
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#1

Re: KNAN, KNAF,ONAN, ONAF

10/16/2009 12:07 AM

Sorry.

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Anonymous Poster
#7
In reply to #1

Re: KNAN, KNAF,ONAN, ONAF

10/17/2009 2:40 PM

You are one special type of clown lynlynch

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Anonymous Poster
#2

Re: KNAN, KNAF,ONAN, ONAF

10/16/2009 9:13 AM

Check this

http://www.vtcindia.com/Downloads/Comparative%20Study%20of%20IEC%2076%20and%20C57%20rev%2001.pdf

and

http://www.usbr.gov/power/data/fist/fist3_30/fist3_30.pdf Page 5

These are the nearest I could find (except from my standards as well as the handbooks, none I can paste here)

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Active Contributor

Join Date: Jul 2009
Posts: 17
#6
In reply to #2

Re: KNAN, KNAF,ONAN, ONAF

10/17/2009 9:12 AM

ONAN Refer to cooling of a transformer where the oil in the tank circulates by natural process and air on outside for cooling is circulates by natural process. Oil Natural Air Natural

ONAF Refers to coolling of a transformer where oil in tank is circulated by natural process and air is circulated by a fan which is forced cooling, Oil Natural Air Forced

I am not familiar with KNAN/KNAF

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8
Anonymous Poster
#3

Re: KNAN, KNAF,ONAN, ONAF

10/16/2009 9:23 AM

First letter - main cooling medium (in contact with the windings)

O = mineral or synthetic oil, flash point < 3000C

K = do with Flash point > 3000C

L = do with unmeasurable flash point

Second: Circulation method of media 1

F = Forced,

N = natural

D= Forced, Through a cooler

Third - External Cooling media

A= Air, W= Water

Fourth- Circulation of (3)

F= Forced,

N= natural.

So KNAN = Cooling fluid(liquid) with flash point > 300 degree, natural circulation in the tank, the tank is cooled by naturally circulating air ie kept in open ambient (not cooled by fans etc)

For more details you must refer to IEEE 57 12 00

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Anonymous Poster
#11
In reply to #3

Re: KNAN, KNAF,ONAN, ONAF

05/18/2010 2:10 AM

Thanx for info!!

:D

Daham

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#4

Re: KNAN, KNAF,ONAN, ONAF

10/16/2009 10:42 PM

Dear Sir / Madam,

Good day!

1. KNAN: Kick Nose And Nuts. If you really want to hurt someone.

2. KNAF: Keep Nose At Fart. If you're a sadist who wants to suffocate someone.

3. ONAN: Only Nose And Nuts. If you don't want to hurt someone too badly.

4. ONAF: Only Nose At Fart. Similar to KNAF, only to someone with a really big nose.

You're welcome,

Lord Vader

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Anonymous Poster
#5
In reply to #4

Re: KNAN, KNAF,ONAN, ONAF

10/16/2009 11:40 PM

LMAO - nice to see someone with a sense of humour out there!!!

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Anonymous Poster
#9
In reply to #5

Re: KNAN, KNAF,ONAN, ONAF

10/19/2009 7:12 AM

Humor at the 5th grade level... Sounds like told by an old engineer who worked for too long in an union environment...

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#10
In reply to #9

Re: KNAN, KNAF,ONAN, ONAF

10/19/2009 12:43 PM

That's where you got me all wrong. I'm a young man actually. The reason for the toilet humor is because I have to work with stuff like sewage and human wastes all the time, so in due time I developed a shitty sense of humor.

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Associate

Join Date: Feb 2009
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#8

Re: KNAN, KNAF,ONAN, ONAF

10/18/2009 5:58 PM

The K is for mostly the new Natural ester type fluids with a flash point of greater than 300C. These fluids are relatively new & are often vegetable based dielectric fluids. These fluids are very biodegradable & are the way of the future. They are often used in high fire risk situations - gets rid of the old PCB oils & silicon fluids etc.

You can get more details about their charateristics & methods of testing them in IEEE, IEC & ASTM standards

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Anonymous Poster
#12
In reply to #8

Re: KNAN, KNAF,ONAN, ONAF

01/12/2011 7:04 AM

Look for Midel!

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Users who posted comments:

Anonymous Poster (7); DVader1000 (2); georgesturge@nl.rogers.co (1); KRW43 (1); lyn (1)

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