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MEPS Levels, O: I" X! b, r0 }) E& @
Energy performance requirements include the average efficiency (measured at 25%, 50%, 75% and 100% of rated output power) and consumption at no load. To meet MEPS, a power supply must meet or exceed the requirements for average efficiency, and meet or be lower than the no load thresholds, when tested according to AS/NZS 4665.1.
" M( |7 T9 A' M- B& eMEPS requirements are shown in Table 1 and Table 2 below:
6 D4 s9 h# T/ c7 d/ l3 }. W: pTable 1: MEPS required minimum efficiency level
; Q0 Z9 o" B' F5 K: NNameplate Power Output (Pno) Average Efficiency
p; |- G! s( ?& B# C0 to 1 watt ≥ 0.49 x Pno
' B j. i6 p2 W6 u {% `> 1 to 49 watts ≥ 0.09Ln(Pno)+0.494 [+ B5 X2 N1 g/ d2 F* q, Y! @0 k0 e+ e
> 49 to 250 watts ≥ 0.84
+ I1 C( C% S* I2 x+ bWhere:2 R% ~, R/ e9 g) _) l
Pno is the nameplate output power of the Unit Under Test./ } a, L% e' V/ \$ v
"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.+ f4 l% H- K* G9 {. Z! f
Table 2: MEPs required maximum no-load power (Watts)
( R! V: }1 g& @: DNameplate Power Output (Pno) No Load Power0 E/ S+ i1 h6 R( l
Watts AC-DC No Load Power% i+ z' h" t4 b' |8 I* b9 z+ v
Watts AC-AC
/ V- v2 _- [# N, p$ c' g0 to < 10 watts ≤ 0.5 N/A
8 ?; w1 V/ S1 c$ B2 c2 Z; R10 to 250 watts ≤ 0.75 N/A
Z, Q7 K7 n% L8 nHigh Efficiency Levels- p$ h; d9 x4 M
Minimum efficiency levels for "High Efficiency Power Supplies", are shown in Table 3 below.* }! [) {6 Q! L0 f G4 k" t
Table 3: Efficiency requirements for 'high efficiency' external power supplies
W7 R% t1 ~ u/ Q6 x1 |Nameplate Power Output (Pno) Average Efficiency: F4 D: r) H0 n+ z6 [( K3 G9 F7 F
0 to 1 watt ≥ 0.5 x Pno
, p- U& G! W/ X W& _# o> 1 to 51 watts ≥ 0.09Ln(Pno)+0.5 ~$ q4 ?- z& B
> 51 to 250 watts ≥ 0.85 o4 K( v; ^- A& u) x. G6 b* b8 U: |: K
Where:
/ @: a# K# s* O& E: @- C0 GPno is the nameplate output power of the Unit Under Test.
$ m" i6 g. p5 O1 n9 N# t& B. O% K"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.
* I5 e; }* J1 i% R) [5 rTable 4: High Efficiency requirements for maximum no-load power (Watts)
: X( e- B* G8 Y; }& |Nameplate Power Output (Pno) No Load Power- X. J+ u7 w, J, y
Watts( y" K, x/ o$ z8 l: s" @7 P
0 to ≤ 250 watts ≤ 0.5
5 I X) l" h& S* s2 [Energy Performance Mark
, m$ w& J) t/ b# p- J4 vThe energy performance mark is an international initiative to assist regulators monitor compliance with AS/NZS 4665-2005. It will be mandatory from October 2008. |
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