From: Corkran, Jerry L [mailto:Jerry.Corkran@CooperIndustries.com]  

Sent: Thursday, November 17, 2011 4:08 PM

To: Katie Coughlin; Richard Parker

Cc: rick.anderson@faypwc.com; tballo@earthjustice.org; ScottB@LVMetals.com;

john.caskey@nema.org; Cymbalsky, John; adelaski@standardsASAP.org; Teckman@nwcouncil.org;

gbf1@pge.com; carlos.gaytan@ge.com; rgreeson@federalpacific.com; bruce.r.hirsch@bge.com;

jhodge@howard.com; mhyland@appanet.org; dave.millure@metglas.com; snadel@aceee.org;

wes.patterson@us.abb.com; Eric.Petersen@aksteel.com; Raymond.Polinski@ATImetals.com;

artrosenfeld@gmail.com; srosenstock@eei.org; rroy@nrdc.org; robert.saint@nreca.coop;

chuck.simmons@pgnmail.com; kwinder@mleainc.com; mwaltner@nrdc.org;

jerry.schoen@aksteel.com; Paul.Ryan@hitmet.com; BermanEconomics@gmail.com;

ahofmann@publicpower.org; pkumar@publicpower.org; bsmith@federalpacific.com;

greg.coulter405@gmail.com; jmauer@standardsasap.org; Cohen, Daniel; Meyers, Aaron;

Jim.creevy@nema.org; jrossetti@mlgw.org; cabolduc@lbl.gov; Brian Coffey; Michael Rivest;

gjrosenquist@lbl.gov; Caitlin Johnson; Zhimei Luo; Marchetti, Emily (CONTR); charlied@uus.org;

DYoung@energy‐solution.com; James.Lass@cleco.com; maheshsampat@bellsouth.net;

phopkinson@hvolt.com; Matthew Nardotti; Raba, Jim; Savitz, Maxine (EMAB);

tpetrosino@carolina.rr.com; chris.brown@cogentpowerinc.com; ted.johnstone@cogentpowerinc.com;

frank.guilbault@cogentpowerinc.com; ned.efbrush@gmail.com; dbrender@cda.copper.org;

chad.kennedy@us.schneider‐electric.com; eduardorobles@eaton.com;

vijay.tendulkar@onyxpower.com; thomas.patzner@us.schneider‐electric.com;

carlosgsiqueiros@eaton.com; Trujillo, Antonio

Subject: RE: MVDT shipments

Katie, Richard and the WG,

The following paragraph is incorrect in the assumption listed that the lower core losses  for amorphous

transformers would be expected to have any effect on the temperatures reached inside the

transformers.   Transformers are built to a specified winding rise such as 65 degrees C rise at full load

and typically with an 80 C maximum hot spot temperature.   The manufacturers have the responsibility

to add additional tank cooling and internal coil ducts as needed to limit the temperatures to these

maximum operating temperatures.  For very small transformers where the tank provides excessive

external cooling, the transformers may be cooler due to the slightly fewer watts for the amorphous core

units.   

DOE considered the possibility that more efficient transformers may operate at lower temperatures,

which could alter their retirement function. After reviewing the engineering data, DOE found that more

efficient transformers made with an amorphous core material demonstrate a significant drop in

operating temperatures. Theoretically, lower operating temperatures should lower the degradation rate

of electrical insulation in the transformer and result in fewer failures over time. Amorphous core

technology is relatively recent (within the last couple of decades), however, and the technology can

require larger, bulkier transformers, features that may contribute to more frequent replacements over

the long term. The larger size and weight, for example, can lead to increased failures during storms or

increased replacements because of size or space constraints. DOE did not have enough information to

determine whether such transformers would have longer or shorter lifetimes relative to baseline

transformers and therefore estimated that the transformer lifetime function should be independent of

transformer efficiency.
Regards,

                Jerry Corkran

From: Katie Coughlin [mailto:kcoughlin@lbl.gov]  

Sent: Thursday, November 17, 2011 2:29 PM

To: Richard Parker

Cc: rick.anderson@faypwc.com; tballo@earthjustice.org; ScottB@LVMetals.com;

john.caskey@nema.org; Corkran, Jerry L; Cymbalsky, John; adelaski@standardsASAP.org;

Teckman@nwcouncil.org; gbf1@pge.com; carlos.gaytan@ge.com; rgreeson@federalpacific.com;

bruce.r.hirsch@bge.com; jhodge@howard.com; mhyland@appanet.org; dave.millure@metglas.com;

snadel@aceee.org; wes.patterson@us.abb.com; Eric.Petersen@aksteel.com;

Raymond.Polinski@ATImetals.com; artrosenfeld@gmail.com; srosenstock@eei.org; rroy@nrdc.org;

robert.saint@nreca.coop; chuck.simmons@pgnmail.com; kwinder@mleainc.com; mwaltner@nrdc.org;

jerry.schoen@aksteel.com; Paul.Ryan@hitmet.com; BermanEconomics@gmail.com;

ahofmann@publicpower.org; pkumar@publicpower.org; bsmith@federalpacific.com;

greg.coulter405@gmail.com; jmauer@standardsasap.org; Cohen, Daniel; Meyers, Aaron;

Jim.creevy@nema.org; jrossetti@mlgw.org; cabolduc@lbl.gov; brian.coffey@navigant.com;

mrivest@navigant.com; gjrosenquist@lbl.gov; caitlin.johnson@navigant.com;

zhimei.luo@navigant.com; Marchetti, Emily (CONTR); charlied@uus.org; DYoung@energy‐solution.com;

James.Lass@cleco.com; maheshsampat@bellsouth.net; phopkinson@hvolt.com;

matthew.nardotti@navigant.com; Raba, Jim; Savitz, Maxine (EMAB); tpetrosino@carolina.rr.com;

chris.brown@cogentpowerinc.com; ted.johnstone@cogentpowerinc.com;

frank.guilbault@cogentpowerinc.com; ned.efbrush@gmail.com; dbrender@cda.copper.org;

chad.kennedy@us.schneider‐electric.com; eduardorobles@eaton.com;

vijay.tendulkar@onyxpower.com; thomas.patzner@us.schneider‐electric.com;

carlosgsiqueiros@eaton.com

Subject: MVDT shipments

Hello all,

The draft Chapter 9 of the TSD, with shipments data from 2009, is attached. The table we looked at

today is table 9.3.3 on page 7.

regards,

Katie

On Thu, Nov 10, 2011 at 7:05 AM, Freeman, Jeremiah (CONTR) <Jeremiah.Freeman@ee.doe.gov>

wrote:

When: Thursday, November 17, 2011 1:00 PM‐5:00 PM (GMT‐05:00) Eastern Time (US & Canada).

Where: Webinar and Phone

  

Note: The GMT offset above does not reflect daylight saving time adjustments.

  

*~*~*~*~*~*~*~*~*~*

  

Dear Colleagues,

  

This event is to save the time slot on your calendar based on our discussion at yesterday's meeting.

Later today further information will be sent regarding the registration information for our November 17

and November 21 webinars. After registering you will get the link for the webinar and a toll free

number.
  

Please call with questions or concerns.  

  

Very Respectfully,

Jeremiah Freeman

202‐431‐4243 (cell)

202‐586‐1867 (office)