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Does anyone know if another company sells Economy Fuse & Manufacturing's product line? Looks like they may have been a part of Federal Pacific Electric at one time. Thanks

My firm has been asking ABB for assistance in applying this relay for several years with very little luck. We have heard the same thing from switchgear manufacturers about poor support. However, one of their application engineers came by a few months ago and we will probably install on the...

Delta-X Research http://www.deltaxresearch.com/ and Hartford Steam Boiler http://www.hsb.com/products.asp?id=94 may be helpful.

Here is a presentation made an the Fall 2005 transformer committee meeting: http://www.transformerscommittee.org/info/f05-presentations.htm

I recently went to one of SKM's training sessions and found it very useful. Like you, I have been using their products for a while, so all of the material they covered was not new. However, you will probably pick up a few things that will allow you to do your job more quickly or give you more...

To get an overview of what some utilities are doing, go to http://www.pes-psrc.org/i/ Click on the "Published Reports" link then scroll down to the Working Group Report "Results of the 2002 Distribution Protection Survey".

Waukesha also offers transformer courses.

Here are several others: http://www.acsatlanta.com/ http://www.novatechweb.com/ http://www.survalent.com/ http://www.valquest.com/

It would depend on the relay. Many microprocessor based relays operate only on the fundamental component of the current.

There is not consensus on the level of furans that indicate a transformer is at the end of its useful life. I have seen values quoted from 100 ppb to 4000 ppb. When trying to make comparisons, it is important to know if the paper insulation is thermally upgraded (typical in North America) or...

Looking back at a Federal Pacific catalog, they became North American in 1987. I guess Waukesha would be the contact now.

The 1981 version of the loading guide has the following assumed characteristics(rise above ambient) at rated load for a 65C transformer: OA FA FA Hottest-spot 80C 80C 80C Top-oil 55C 50C 45C Values would vary for each transformers specific...

There is a paper from the Petroleum and Chemical Industry Conference that may be useful: "Do you want to put all your 'Relay Eggs' in one Basket?" Paper No. PCIC-98-22 You can purchase it through IEEE Explore.

I have looked at this issue some and asked a similar question in one of the other forums. Some possible mitigation methods other than lubricants are: Galling resistant Stainless Steels are available. Use of a torque wrench to prevent over-tightening. Silver plating. One manufacturer suggests...

In addition ANSI/IEEE Std 242 "IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power System" or the Buff Book could be helpful

IEEE Std 141 "IEEE Recommended Practice for Electric Power Distribution for Industrial Plants" or the Red Book provides some guidance, but is not specific to the process industry.

Beckwith and GE are possible resources

S. D. Myers has a pretty good book that covers oil testing and other topics related to transformer maintenance. Go to the bookstore at: http://www.sdmyers.com/new_site/

This standard busbar referenced is good. Another standard you should review if you are specifying a grounding transformer is: ANSI/IEEE Std 32 IEEE Standard Requirements, Terminology, and Test Procedure for Neutral Grounding Devices. A good application reference, with examples, is...

That is the way it appears. 11.5.2.1 includes equations to correct for currents other than rated.