From: Dhiru Patel [mailto:dpatel@hammondpowersolutions.com]

Sent: Thursday, December 22, 2011 2:09 PM

To: Richard Parker

Cc: Brian Coffey; Thomas Patzner

Subject: RE: MVDT Scaling

Hi Richard,

Thank you for forwarding the draft MVDT scaling methodology. I am pleased that this draft addresses

real life issue for less than 300 kVA transformers. We can meet the listed losses in this document using

M3 steel.

Further to our discussion on LVDT

, we designed the full range of 3 phase kVA and here is our findings.

 We can meet CSL 4 from 30 kVA to 500 kVA, using M4 material and cost increases are

reasonable.

 We can meet CSL4 for 15, and 600to 1000 kVA using M3 material. We had tough time even after

using M3 and material costs were doubled compared to base efficiency level. If we drop this to

CSL3 for 15 kVA and 600

‐ 1000kVA, costs were again in line.

 In conclusion, for LVDT, we would be OK if negotiating team proposed CSL4 from 30kVA to 600

kVA and CSL3 for 15 kVA & from 601 kVA to 1000 kVA.

I hope this helps.

Dhiru Patel, M.Sc., P. Eng.

Director of Engineering

Hammond Power Solutions Inc.

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

Sent: December 21, 2011 4:26 PM

To: Dhiru Patel

Cc: Brian Coffey; Thomas Patzner

Subject: Fwd: MVDT Scaling



### Dhiru,

It was a pleasure talking with you just now. Here is the promised write-up of the proposed

scaling approach for MVDT. You should feel free to contact Brian Coffey directly with

questions or concerns.

On low voltage, I am also ccing Tom Patzner at Sc hneider who I think will be able to give you

his approach to scaling in the LVDT space with any technical explanation that you would need.

All best,

Richard Parker

Facilitator

### ---------- Forwarded message ----------

From: Brian Coffey < brian.coffey@navigant.com >

Date: Wed, Dec 21, 2011 at 3:27 PM

Subject: MVDT Scaling

To: John Cymbalsky < john.cymbalsky@ee.doe.gov >, Richard Parker

< richardparkerdc@gmail.com >, Wes Patterson < wes.patterson@us.abb.com >, Rob Greeson

< rgreeson@federalpacific.com >, Bob Smith < bsmith@federalpacific.com >, Eric Petersen

< Eric.Petersen@aksteel.com >

Cc: Michael Rivest < mrivest@navigant.com >, Christopher Bolduc < cabolduc@lbl.gov >,

Matthew Nardotti < matthew.nardotti@navigant.com >

Team,

I’ve attached a draft write-up of the last Friday’s MVDT scali ng discussion, as I’ve remembered

it. Once we have reviewed and edited this draf t, we can distribute to the committee at-large.

Have I omitted any email addresses from the call?

Best,

Brian

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