10 CFR 431.196 - Energy conservation standards and their effective dates.

Beta! The text on the eCFR tab represents the unofficial eCFR text at ecfr.gov.
§ 431.196 Energy conservation standards and their effective dates.

(a) Low-Voltage Dry-Type Distribution Transformers.

(1) The efficiency of a low-voltage, dry-type distribution transformer manufactured on or after January 1, 2007, but before January 1, 2016, shall be no less than that required for the applicable kVA rating in the table below. Low-voltage dry-type distribution transformers with kVA ratings not appearing in the table shall have their minimum efficiency level determined by linear interpolation of the kVA and efficiency values immediately above and below that kVA rating.

Single-phase Three-phase
kVA % kVA %
15 97.7 15 97.0
25 98.0 30 97.5
37.5 98.2 45 97.7
50 98.3 75 98.0
75 98.5 112.5 98.2
100 98.6 150 98.3
167 98.7 225 98.5
250 98.8 300 98.6
333 98.9 500 98.7
750 98.8
1000 98.9

Note: All efficiency values are at 35 percent of nameplate-rated load, determined according to the DOE Test Method for Measuring the Energy Consumption of Distribution Transformers under Appendix A to Subpart K of 10 CFR part 431.

(2) The efficiency of a low-voltage dry-type distribution transformer manufactured on or after January 1, 2016, shall be no less than that required for their kVA rating in the table below. Low-voltage dry-type distribution transformers with kVA ratings not appearing in the table shall have their minimum efficiency level determined by linear interpolation of the kVA and efficiency values immediately above and below that kVA rating.

Single-phase Three-phase
kVA Efficiency
(%)
kVA Efficiency
(%)
15 97.70 15 97.89
25 98.00 30 98.23
37.5 98.20 45 98.40
50 98.30 75 98.60
75 98.50 112.5 98.74
100 98.60 150 98.83
167 98.70 225 98.94
250 98.80 300 99.02
333 98.90 500 99.14
750 99.23
1000 99.28

Note: All efficiency values are at 35 percent of nameplate-rated load, determined according to the DOE Test Method for Measuring the Energy Consumption of Distribution Transformers under Appendix A to Subpart K of 10 CFR part 431.

(b) Liquid-Immersed Distribution Transformers.

(1) The efficiency of a liquid-immersed distribution transformer manufactured on or after January 1, 2010, but before January 1, 2016, shall be no less than that required for their kVA rating in the table below. Liquid-immersed distribution transformers with kVA ratings not appearing in the table shall have their minimum efficiency level determined by linear interpolation of the kVA and efficiency values immediately above and below that kVA rating.

Single-phase Three-phase
kVA Efficiency
(%)
kVA Efficiency
(%)
10 98.62 15 98.36
15 98.76 30 98.62
25 98.91 45 98.76
37.5 99.01 75 98.91
50 99.08 112.5 99.01
75 99.17 150 99.08
100 99.23 225 99.17
167 99.25 300 99.23
250 99.32 500 99.25
333 99.36 750 99.32
500 99.42 1000 99.36
667 99.46 1500 99.42
833 99.49 2000 99.46
2500 99.49

Note: All efficiency values are at 50 percent of nameplate-rated load, determined according to the DOE Test - Procedure, Appendix A to Subpart K of 10 CFR part 431.

(2) The efficiency of a liquid-immersed distribution transformer manufactured on or after January 1, 2016, shall be no less than that required for their kVA rating in the table below. Liquid-immersed distribution transformers with kVA ratings not appearing in the table shall have their minimum efficiency level determined by linear interpolation of the kVA and efficiency values immediately above and below that kVA rating.

Single-phase Three-phase
kVA Efficiency
(%)
kVA Efficiency
(%)
10 98.70 15 98.65
15 98.82 30 98.83
25 98.95 45 98.92
37.5 99.05 75 99.03
50 99.11 112.5 99.11
75 99.19 150 99.16
100 99.25 225 99.23
167 99.33 300 99.27
250 99.39 500 99.35
333 99.43 750 99.40
500 99.49 1000 99.43
667 99.52 1500 99.48
833 99.55 2000 99.51
2500 99.53

Note: All efficiency values are at 50 percent of nameplate-rated load, determined according to the DOE Test Method for Measuring the Energy Consumption of Distribution Transformers under Appendix A to Subpart K of 10 CFR part 431.

(c) Medium-Voltage Dry-Type Distribution Transformers.

(1) The efficiency of a medium-voltage dry-type distribution transformer manufactured on or after January 1, 2010, but before January 1, 2016, shall be no less than that required for their kVA and BIL rating in the table below. Medium-voltage dry-type distribution transformers with kVA ratings not appearing in the table shall have their minimum efficiency level determined by linear interpolation of the kVA and efficiency values immediately above and below that kVA rating.

Single-phase Three-phase
kVA BIL* kVA BIL
20-45 kV 46-95 kV ≥96 kV 20-45 kV 46-95 kV ≥96 kV
Efficiency
(%)
Efficiency
(%)
Efficiency
(%)
Efficiency
(%)
Efficiency
(%)
Efficiency
(%)
15 98.10 97.86 15 97.50 97.18
25 98.33 98.12 30 97.90 97.63
37.5 98.49 98.30 45 98.10 97.86
50 98.60 98.42 75 98.33 98.12
75 98.73 98.57 98.53 112.5 98.49 98.30
100 98.82 98.67 98.63 150 98.60 98.42
167 98.96 98.83 98.80 225 98.73 98.57 98.53
250 99.07 98.95 98.91 300 98.82 98.67 98.63
333 99.14 99.03 98.99 500 98.96 98.83 98.80
500 99.22 99.12 99.09 750 99.07 98.95 98.91
667 99.27 99.18 99.15 1000 99.14 99.03 98.99
833 99.31 99.23 99.20 1500 99.22 99.12 99.09
2000 99.27 99.18 99.15
2500 99.31 99.23 99.20

* BIL means basic impulse insulation level.

Note: All efficiency values are at 50 percent of nameplate rated load, determined according to the DOE Test Method for Measuring the Energy Consumption of Distribution Transformers under Appendix A to Subpart K of 10 CFR part 431.

(2) The efficiency of a medium- voltage dry-type distribution transformer manufactured on or after January 1, 2016, shall be no less than that required for their kVA and BIL rating in the table below. Medium-voltage dry-type distribution transformers with kVA ratings not appearing in the table shall have their minimum efficiency level determined by linear interpolation of the kVA and efficiency values immediately above and below that kVA rating.

Single-phase Three-phase
kVA BIL* kVA BIL
20-45 kV 46-95 kV ≥96 kV 20-45 kV 46-95 kV ≥96 kV
Efficiency
(%)
Efficiency
(%)
Efficiency
(%)
Efficiency
(%)
Efficiency
(%)
Efficiency
(%)
15 98.10 97.86 15 97.50 97.18
25 98.33 98.12 30 97.90 97.63
37.5 98.49 98.30 45 98.10 97.86
50 98.60 98.42 75 98.33 98.13
75 98.73 98.57 98.53 112.5 98.52 98.36
100 98.82 98.67 98.63 150 98.65 98.51
167 98.96 98.83 98.80 225 98.82 98.69 98.57
250 99.07 98.95 98.91 300 98.93 98.81 98.69
333 99.14 99.03 98.99 500 99.09 98.99 98.89
500 99.22 99.12 99.09 750 99.21 99.12 99.02
667 99.27 99.18 99.15 1000 99.28 99.20 99.11
833 99.31 99.23 99.20 1500 99.37 99.30 99.21
2000 99.43 99.36 99.28
2500 99.47 99.41 99.33

* BIL means basic impulse insulation level.

Note: All efficiency values are at 50 percent of nameplate rated load, determined according to the DOE Test Method for Measuring the Energy Consumption of Distribution Transformers under Appendix A to Subpart K of 10 CFR part 431.

(d) Mining Distribution Transformers. [Reserved]

[78 FR 23433, Apr. 18, 2013]

Title 10 published on 2015-01-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 10 CFR Part 431 after this date.

  • 2015-12-09; vol. 80 # 236 - Wednesday, December 9, 2015
    1. 80 FR 76355 - Energy Conservation Program: Energy Conservation Standards for High-Intensity Discharge Lamps
      GPO FDSys XML | Text
      DEPARTMENT OF ENERGY, Office of Energy Efficiency and Renewable Energy
      Final determination.
      This final determination is effective December 9, 2015.
      10 CFR Part 431