From: Richard Parker [mailto:richardparkerdc@gmail.com]

Sent: Saturday, December 17, 2011 11:40 AM

To: Timothy Ballo

Cc: Freeman, Jeremiah (CONTR); rick.anderson@faypwc.com; ScottB@LVMetals.com; john.caskey@nema.org; jerry.corkran@c ooperindustries.com; Cymbalsky, John; adelaski@standardsASAP.org; Teckman@nwcounc il.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.pa tterson@us.abb.com; Eric.Petersen@aksteel.com; Raymond.Polinski@ATImetals.com; artrosenfeld@g mail.com; srosenstock@ee i.org; rroy@nrdc.org; robert.saint@nreca.coop; chuck.simmons@pgnmail.c om; 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@s tandardsasap.org; Cohen, Daniel; Aaron.Meyers@CooperIndustries.com; Jim.creevy@ne ma.org; jrossetti@mlgw.org; cabolduc@lbl.gov; kcoughlin@lbl.gov; Brian Coffey; Michael Rivest; gj rosenquist@lbl.gov; Caitlin Johnson; Zhimei Luo; Marchetti, Emily (CONTR); charlied@uus.org; DYo ung@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; chad.kennedy@schneider-e lectric.com; Hyland, Mike; Caskey, John; Robert Greeson; thomas.patzner@schneider-electric.com; irenek@onyxpower.com; scott.may@siemens.com; Robert Carmichael; Christopher Lau Subject: Re: LVDT Working Group on Data Center Transformers

Thanks to Tim, Tom and Vijay for their good work on this. I look forward to reviewing the draft and discussing it on the call on Tuesday.

All best,

Richard

On Sat, Dec 17, 2011 at 1:09 AM, Timothy Ballo < tballo@earthjustice.org > wrote: All,

Attached is the product of the LVDT work gr oup 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 signif icant variation that ex ists even within the

universe of data center transformers. We settle d 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 - reta ining 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 refl ects the unique loading profiles of data center tran sformers, so that a future efficiency standard for these units can better achieve real-world energy savings.Tom Patzner and Vijay Tendulkar deserve the vast ma jority of the credit/blame for the content of

the attached. We look forward to discussi ng the proposed approach on Tuesday's call.

Thanks.

-Tim Ballo