External Power Supplies,
EcoDesign Performance

Various industrialized countries have started to regulate energy usage efficiency for a variety of standard consumer and industrial products. Along with other types of electronic equipment, power adapters have come under scrutiny with respect to energy usage. Below is a synopsis of the various energy performance regulations and standards that have been promulgated over the last few years (for power adapters).


 

MANDATORY COMPLIANCE, with exemption for medical equipment.

 

CEC
(California Energy Commission)
As of July 1st, 2008 external power supplies (power adapters) are required to meet Tier 2 limits. This is equivalent to Efficiency Level 4 (see table 1).

 

DOE
(U.S.A. Department of Energy)

As of July 1st, 2008 external power supplies (power adapters) are required to meet limits called out in EISA2007 (Energy Independence and Security Act). This is equivalent to Efficiency Level 4 (see table 1). The EISA2007 national law supercedes individual state laws.

 

AUSTRALIA / NEW ZEALAND
In order to meet the requirements of regulation AS/NZS 4665, an external power supply must meet the requirements of Efficiency Level 3 (see table 1). This requirement became effective as of Dec 1st, 2008. There is an exception in the Aus/NZ regulation that exempts AC-AC power adapters from needing to meet the no load energy consumption requirement.

 

 

VOLUNTARY COMPLIANCE,

 

 

EPA
(U.S.A. Environmental Protection Agency)

The EPA controls the Energy Star program in the USA. On Nov 1st 2008, the EPA modified the requirements of the Energy Star program when they changed from the V1.1 control document, to the V2.0 control document. The V2.0 document now requires Efficiency Level 5 performance in order to be Energy Star compliant.

 

EC

(European Commission)

The EC has created the document "Code of Conduct on Efficiency of External Power Supplies ", version 3 is to be implemented on Jan 1, 2009. This new version coincides with Efficiency Level 5 (see table 1).

 

EU

(European Union)

The EU Directive 2005/32/EC established a framework from which various ecodesign (energy performance) standards could be promulgated. Eventually, this legislation will require mandatory compliance for all products made in excess of 200000 units annually.

 

CECP
(China Certification Centre for Energy Conservation Product )
Currently China requires voluntary compliance to Efficiency Level 2 requirements (see table 1). China is considering making these requirements mandatory, should voluntary compliance be shown to be inadequate.

 

KEMCO
(Korea Energy Management Corporation)

Sometime in 2010 Korea will require compliance to the “Standby Korea 2010,” program. The External Power Supply category will require less than 0.5W input power, lack of compliance will require application of a rather large octagon shaped yellow label which states the product "fails to meet" energy performance requirements.

 

Table 1,
Minimum Energy Performance Classification
Efficiency
Level
Mark
Performance Requirements
Nameplate Power
Output (Pno)
Required No-Load
Input Power
  Nameplate Power
Output (Pno)
Required Average Active
Efficiency
  Power Factor
I Used if none of the other criteria are met   Not Applicable
II 1 to <=10 W
10 to 250 W
<= 0.75 W
<= 1.0 W
  0 to 1 W
> 1 to 49 W
> 49 to 250 W
>= 0.39 x Pno
>= 0.107 x Ln(Pno) + 0.39
>= 0.82
 
III 0 to < 10 W
10 to 250 W
<= 0.5 W
<= 0.75 W
  0 to 1 W
> 1 to 49 W
> 49 to 250 W
>= 0.49 x Pno
>= 0.090 x Ln(Pno) + 0.49
>= 0.84
 
IV 0 to 250 W <= 0.5 W   0 to 1 W
> 1 to 51 W
> 51 to 250 W
>= 0.50 x Pno
>= 0.090 x Ln(Pno) + 0.50
>= 0.85
 
V 0 to < 50 W


50 to 250 W
<= 0.5 W for ac-ac
<= 0.3 W for ac-dc

<= 0.5 W
  0 to 1 W


> 1 to 49 W


> 49 to 250 W
 
Vo > 6V:  >= 0.480 x Pno + 0.140
Vo <= 6V: <= 0.497 x Pno + 0.067

Vo > 6V:  0.0626 x Ln(Pno) + 0.622
Vo <= 6V: 0.0750 x Ln(Pno) + 0.561

Vo > 6V:          >= 0.87
Vo <= 6V:           <= 0.86
  Power supplies with 100W
or greater input power must
have a true power factor
of 0.90 or greater at 100%
load when tested at
115Vac, 60 Hz.

 

 

 

Table 2,
Jerome Industries Efficiency Level 4 / 5 Product List
Power Conversion Technology Product Description
(webpage link)
Model Series Nominal 12V
Output Power Rating
Available
Output Voltage Range
International
Marking Protocol
Efficiency Level
Misc.
Notes
Switchmode Mini Power
Family
WSC100 10W 5V-36V Efficiency Level 4 or 5
(EISA 2007)
Product availability, now.
WSA400 20W 5V-48V
WSA500 30W 7V-48V
Surge Power
Family
WSL700 36W 5V-48V Efficiency Level 4 or 5
(EISA 2007)
Product availability, now.
WSZ700 60W
Excel
Family
WSL900 40W 12V-48V Efficiency Level 4 or 5
(EISA 2007)
Product availability, now.
WSL400 50W
WSL500 60W
Ultra Family WSZ400 80W 12V-48V Efficiency Level 4
(EISA 2007)
Product availability, now.
WSZ500 90W
WSX400 100W
WSX500 120W
Max Power
Family
WSX600 150W 12V-48V Efficiency Level 4
(EISA 2007)
Product availability, now.
WSX800 180W
Linear Regulated
DC Power Supply
Regulated Linear Technology "R" Series 2.7W 5V-36V Efficiency Level 4
(EISA 2007)
Only very low output power linear regulated models compliant to MEPS requirements.
Unregulated DC
Power Supply
Unregulated Technology "U" Series 1.5W
to
30W
6V-48V Efficiency Level 4
(EISA 2007)
10 different sub-product series available,
in various case sizes
AC-AC,
Transformer
Transformers "T" Series 3VA
to
40VA
6Vac- 27Vac Efficiency Level 5
(EISA 2007)
10 different sub-product series available,
in various case sizes

 

 


MISC. REGULATORY LINKS:

1) The California Energy Commission regulates power adapters thru it's Appliance Regulations office. Information can be found at: www.energy.ca.gov/appliances/index.html

2) The US Department of Energy (DOE) regulates external power supplies based upon the EISA 2007 legislation (Energy Independence and Security Act), which was passed in December 2007. The text of this document is available here: Please see section 301.

3) Australia Link: http://www.energyrating.gov.au/eps2.html

4) EU energy conserving directive Link: http://ec.europa.eu/enterprise/eco_design/directive_2005_32.pdf

 



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