‐‐‐‐‐Original Message‐‐‐‐‐ 

From: Meyers, Aaron [mailto:Aaron.Meyers@CooperIndustries.com]  

Sent: Monday, December 19, 2011 6:50 PM

To: Tendulkar, Vijay (SISC); Richard Parker

Cc: Timothy Ballo; Freeman, Jeremiah (CONTR); rick.anderson@faypwc.com;

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; Jim.creevy@nema.org; jrossetti@mlgw.org;

cabolduc@lbl.gov; kcoughlin@lbl.gov; Brian Coffey; richardparkerdc@gmail.com;

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; thomas.patzner@us.schneider‐electric.com;

carlosgsiqueiros@eaton.com; chad.kennedy@schneider‐electric.com; Hyland, Mike;

Caskey, John; Robert Greeson; thomas.patzner@schneider‐electric.com; Kennedy,

Irene (SISC); scott.may@siemens.com; Robert Carmichael; Christopher Lau; Meyers,

Aaron

Subject: RE: LVDT Working Group on Data Center Transformers

Dear Mr. Parker,

Medium‐voltage liquid‐filled transformers are often used in data center

applications and therefore, defining a "Data Center Transformer" as a three‐phase

low‐voltage dry‐type distribution transformer is potentially damaging.  Would it

be possible to either modify the definition to recognize other types of data

center transformers but state that the exemption only applies to the low‐voltage

dry type variety?  Another alternative might be to define it more specifically as

a Low‐Voltage Dry Type Data Center Transformer?  Thoughts?  Comments?

Thanks and Best Regards,

Aaron

‐‐‐‐‐Original Message‐‐‐‐‐ 

From: Tendulkar, Vijay (SISC) [mailto:vijay.tendulkar@onyxpower.com]

Sent: Sunday, December 18, 2011 1:54 PM

To: Richard Parker

Cc: Timothy Ballo; Freeman, Jeremiah (CONTR); 'rick.anderson@faypwc.com';

'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'; 'kcoughlin@lbl.gov';

'brian.coffey@navigant.com'; 'richardparkerdc@gmail.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'; 'thomas.patzner@us.schneider‐electric.com';

'carlosgsiqueiros@eaton.com'; 'chad.kennedy@schneider‐electric.com';

'Hyland, Mike'; 'Caskey, John'; 'Robert Greeson'; 'thomas.patzner@schneider‐

electric.com'; Kennedy, Irene (SISC); 'scott.may@siemens.com';

'Robert.Carmichael@navigant.com'; 'Christopher.Lau@navigant.com'

Subject: LVDT Working Group on Data Center Transformers

Dear Mr. Parker and respected all others,

    I still have problems with E‐Mail and I hope this

communications reaches all of you. Mr. Ballo is kind enough to bail me out of my

E‐Mail problems and help me out with my not so good proficiency in Microsoft Word

editing. Without lot of help from Mr.

Patzner and Mr. Ballo, DCT definition document could not have been finished in

timely manner. I wish, I will get to work every day with young gentlemen like Mr.

Patzner and Mr. Ballo.  Further, the comments raised in the meetings by various

individuals were very helpful in formulating the final documents. On behalf of

DCT subcommittee, I extend my appreciation to all those who participated in the

DCT definition discussions.

    I have checked the intent and the wording of the final

document submitted by Mr. Ballo on December 16th, 2011, and this document as

written meets my approval. I trust that this document developed by the DCT

subcommittee will meet the approval of all those concerned.

    WISH YOU ALL HAPPY HOLIDAYS AND HAPPY, PEACEFUL, HEALTHY AND

BRIGHT NEW YEAR 2012.

   

With Kind Regards,

   
V. B. Tendulkar

  

‐‐‐‐‐Original Message‐‐‐‐‐ 

From: Timothy Ballo [mailto:tballo@earthjustice.org]

Sent: Friday, December 16, 2011 10:09 PM

To: Freeman, Jeremiah (CONTR); 'rick.anderson@faypwc.com'; 'ScottB@LVMetals.com';

'john.caskey@nema.org'; 'jerry.corkran@cooperindustries.com'; 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; 'Aaron.Meyers@CooperIndustries.com';

'Jim.creevy@nema.org'; 'jrossetti@mlgw.org'; 'cabolduc@lbl.gov';

'kcoughlin@lbl.gov'; 'brian.coffey@navigant.com'; 'richardparkerdc@gmail.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'; Tendulkar, Vijay (SISC); 'thomas.patzner@us.schneider‐

electric.com';

'carlosgsiqueiros@eaton.com'; 'chad.kennedy@schneider‐electric.com';

'Hyland, Mike'; 'Caskey, John'; 'Robert Greeson'; 'thomas.patzner@schneider‐

electric.com'; Kennedy, Irene (SISC); 'scott.may@siemens.com';

'Robert.Carmichael@navigant.com'; 'Christopher.Lau@navigant.com'

Subject: LVDT Working Group on Data Center Transformers

All,

Attached is the product of the LVDT work group tasked with coming up with a

regulatory approach for low‐voltage dry‐type transformers intended for use in

data center applications.  Our intent was to identify a set of criteria capable

of distinguishing data center transformers from more typical LVDT units,

recognizing the significant variation that exists even within the universe of

data center transformers.  We settled on three principal criteria: (1) a

nameplate designation; (2) a maximum inrush current limit; and (3) any two other

design attributes from a checklist of potential features.   

The standards recommended are EL0 ‐ retaining the 2010 standard levels as is.
The attached presents a short‐term fix, but a long term solution to better

address these units may need to include an effort to develop a testing protocol

that better reflects the unique loading profiles of data center transformers, so

that a future efficiency standard for these units can better achieve real‐world

energy savings.   

    

Tom Patzner and Vijay Tendulkar deserve the vast majority of the credit/blame for

the content of the attached.  We look forward to discussing the proposed approach

on Tuesday's call.

Thanks.

‐Tim Ballo

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