### Rosenstock. Steven From: Sent: bounce-380121-53822@ls.eei.org on behalf of Rosenstock, Steven [SRosenstock@eei.org] Friday, October 19, 2007 12:27 PM 

### To: Subject: Electric Light & Power to the National Electric Code Quick summary of transformer rule FYI and use. I also did a table showing the new values. If you are interested, please let me know (it is too large to send over the list serve). Steve EEl has reviewed the final rule on efficiency standards, and we wanted to provide you with a quick summary. Attached is a document with 2 tables, showing the efficiency levels that DOE analyzed during the NOPR process (1-6) and the values that DOE selected for the final rule. Liquid-Filled, Single-Phase Transformers For units rated**~** 10 kVA and**~** 100 kVA, DOE decided on Level**4~** (values between Levels 4 and 5). Many of the values are closer to Level 5 than Level 4. DOE chose Level 4 efficiency for units rated at 167 kV 

### A. For units rated**~** 250 kVA and**~** 833 kVA, DOE decided on Level**2~** (values between Levels 2 and 3). Liquid-Filled, Three-Phase Transformers For units rated**~** 15 kVA and**~** 300 kVA, DOE decided on Level 2 . For units rated at 500 kVA, DOE chose Level 1**~** (a value between Levels 1 and 2). For units rated at 750 kVA, DOE chose**Level3~** (a value between Levels 3 and 4, but just slightly above Level 3). For units rated**~** 1000 kVA and**~** 2500 kVA, DOE chose Level 3 . One of the reasons that DOE chose these levels was the manufacturers requesting an efficiency "match" between singlephase and three-phase units (e .g., 15 kVA single-phase and 45 kVA three-phase). As you will see from the tables, the efficiency values for single-phase units and the three-phase units that are 3 times larger in terms of kVA ratings are the same . The new standards go into effect on January 1, 2010. We hope this summary has been helpful. 

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1

### Table EA.3 Trial Standard Levels for PC 1 Distribution Transformers

- NOPI<. Product Class 1 Liquid-Immersed , Medium-Voltage, Single-Phase Transformers TSL 0 1 2 3 4 5 Design kVA Ave . Min. TP 1 1/30fDiff 2/3 of Diff Min Max Energy Line Bas e Base between between LCC Savings with Cas e C ase TP 1 and T P 1 and No Change Ef

f. Ef f. MinLCC MinLCC inLCC 10 98.42 97 .77 98.4 98.40 98.44 98.48 98 . 69 15 98.57 97.99 98.6 98 .56 98 .59 98 . 63 98 . 82 DL2 25 98 .74 98.23 98.7 98.73 98 .76 98 .79 98 .96 37 .5 98 . 86 98.40 98.8 98 . 85 98.88 98 . 91 99.06 DLl 50 98 .97 98 .56 98 .9 98.90 98 .90 99.04 99.19 75 99 .04 98.66 99 .0 99 .04 99.06 99.08 99 .21 100 99 . 11 98 . 75 99 .0 99.10 99 . 12 99 . 14 99.26 167 99 .22 98.90 99.1 99.21 99 .23 99 .25 99 . 35 250 99 .24 98 . 89 99 .2 99 .26 99 . 36 99.45 99.69 333 99.29 98 .97 99 .2 99 . 31 99.40 99.49 99 . 71 DL3 500 99 . 36 99 .07 99 . 3 99 . 38 99.46 99.54 99 .74 667 99.40 99 . 13 99.4 99.42 99 .50 99.57 99 .76 833 99.44 99.l8 99.4 99.45 99 .52 99.60 99 .77

EA-6 6 Max Energy Savings 99.32 99 . 39 99.46 99.51 99 . 59 99.59 99 . 62 99.66 99.70 99.72 99.75 99 .77 99 . 78 

## Cf

# ff)?L. 

# 9'8,76 <1 

# g. q / qq , ol 

# 91 .

# /; 7

B qq . /7 

# qq, 23 q1. 

# 2> 11, 

# "32- 11.36 qq.y.-'2- 

# qq. 1fb 91 , 

# Y-1

### Table EA.4 Trial Standard Levels for PC 2 Distribution Transformers -/\1

# oflre Product Class 2 Liquid

-Immersed, Medium-Voltage, Three-Phase Transformers TSL 0 1 2 3 4 5 Design kVA Ave. Min . TP 1 1I30fDiff 2/3 of Diff Min Max Energy Line Base Base between between LCC Savings with Case Case TP 1 and TP 1 and No Change Eff. Eff, Min LCC MinLCC inLCC 15 98.06 97.19 98.1 98.36 98.68 98 .68 99.25 30 98.37 97.64 98.4 98.62 98.89 98.89 99.37 45 98.53 97.87 98.6 98.76 99.00 99.00 99.43 75 98.70 98.12 98.7 98.91 99.12 99.12 99.50 112.5 98.83 98.30 98.8 99.01 99.20 99.20 99.55 DL4 150 98.91 98.42 98.9 99.08 99.26 99.26 99.58 225 99.02 98 .57 99.0 99.17 99.33 99.33 99.62 300 99.08 98.67 99.0 99.23 99.38 99.38 99 .65 500 99.19 98.83 99.1 99.32 99.45 99.45 99.69 750 99.24 98 .97 99.2 99.24 99.31 99.37 99.66 

### lOOO 99.29 99 .04 99.2 99.29 99.36 99.41 99.68 DL5 1500 99.36 99.13 99.3 99 .36 99.42 99.47 99 .71 2000 99.40 99.19 99.4 99.40 99.46 99.51 99.73 2500 99.44 99.23 99.4 99.44 99.49 99.53 99.74

EA-7 6 Max Energy Savings 99 .31 99.42 99.47 99.54 99.58 99.61 99.65 99.67 99 .71 99.66 99 .68 99.71 99.73 99.74 

# f)oe 

# rlNAL 

# «.. UL-e



# qg, 36 qF},b2 

# Q8,76 9 

# fJ. q J 

# qq,o/ 1Q · oB Q1,/7 

# <[1,13 CfCfi 

# 25 Cfet. ] 2- 

# Q1 . 3b**qcy~** 

## ifL 

# q'j. lfb 

# 19. Y-Cf

### and medium

-voltage , dry-type transfonners. a 

### Tables EA.1 and EA.2 summarize the proposed standard levels for the liquid-immersed and medium-voltage, dry-type transfonners . T 

### bl EA 1 P

a e , 

### roposed St d d L I f, 

### L' 'd I an ar eve s or IqUl

- 

### mmersedD't 'b 

### f T IS rI U Ion 

### rans ormers Single-Phase Proposed Efficiency Level Three-Phase Proposed Efficiency Level TSL2 TSL2 PC 1 PC2 kVA Efficiency

# .h /Vo,IJ1<. (%) f)Cf:. 

### kVA Ef fi ciency

## ~ 1-/0;;1<- (%) 

# Pot; 10 98.40/Qf), 

## b2. 15 98.36/q'aJ6 

## 15 98 . 56/ q 

# 6'.76 30 98.62/1$,62 25 98 . 73 / 

## Cf'd, GfI 

## 45 98.76

# /qe, 76 37.5 98.85 /9Q,0/ 

## 75 98.91 /98/11 

## 50 98.90/0/9,08 

## 112.5 99.01 /91. III 

## 75 99.04 /QrJ7 

## 150 99.08 /Cf'J. 

## (/8 100 99.10/'fq, 

# 'l3 225 99. 17 /crr, 

## 17 167 99.21/ 

## '1'1',25 300 99 .23/ e 

## Ff, 

## l] 250 99.26 /'1Q,12 

## 500 99 . 32/Qr, 2)' 

## 333 99.3 1/Q,36 

## 750 99 .24/QQ,'32 

## 500 99.38 /rJr, CfL 

## 1000 99.29 /tfCf,ft 

## 667 99.42/99'. 

# Y-6 1500 99.36 /qCj.**y.~** 

## 833 99.45 / 

# q9. 1f'f 2000 99.40 /tf9, 

# 'It 2500 99.44/Qq·H Note : All effiCIency values are at 50% of nameplate rated load, determmed accordmg to the DOE test procedure .

a Because the Energy Policy Act of2005 established energy conservation standards for low-voltage, dry-type distribution transformers, the Department has removed this type oftransformer from the NOPR stage of its analysis . EA-3