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MEPS Levels6 U- U" ^5 } {& ^' ]3 w' t
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.% @% Z; h( O6 T6 @) Y
MEPS requirements are shown in Table 1 and Table 2 below:! f+ W# y4 S$ a
Table 1: MEPS required minimum efficiency level( K8 j+ g a+ C& a8 r
Nameplate Power Output (Pno) Average Efficiency
1 a4 q$ ]; r8 N0 to 1 watt ≥ 0.49 x Pno
; R5 B9 d- n0 I> 1 to 49 watts ≥ 0.09Ln(Pno)+0.49
5 \% x- J, u! q1 I `+ i> 49 to 250 watts ≥ 0.84/ N! O# X- g! S: [1 u
Where:( |, b1 Y B* ~! m- V
Pno is the nameplate output power of the Unit Under Test.; M. D o" {# Z/ \2 Y! \
"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.
. D1 k9 w( Y1 |Table 2: MEPs required maximum no-load power (Watts)
4 I" L# q9 q" S9 iNameplate Power Output (Pno) No Load Power' ?2 x3 z, y% i$ t. P; \
Watts AC-DC No Load Power
0 {: b/ p- x4 g# \/ W; LWatts AC-AC
0 B0 l6 V; F- V; K0 to < 10 watts ≤ 0.5 N/A" g& a* F( B& X# ~
10 to 250 watts ≤ 0.75 N/A8 a2 a$ Q+ `# R O9 W4 r# b
High Efficiency Levels
& O% d/ Z* p1 P% c7 n1 q% ~. S( Y" ZMinimum efficiency levels for "High Efficiency Power Supplies", are shown in Table 3 below.# @6 l9 z0 c3 Q, f b* \
Table 3: Efficiency requirements for 'high efficiency' external power supplies
4 [0 r# o1 y! u- h$ v% ?6 f yNameplate Power Output (Pno) Average Efficiency
) F/ g3 E8 }9 Z, L, d3 t0 to 1 watt ≥ 0.5 x Pno
( ?$ M! e _* o; g1 T> 1 to 51 watts ≥ 0.09Ln(Pno)+0.5
4 O3 D3 N) s1 z3 X# g' W> 51 to 250 watts ≥ 0.85! ~+ O" E( n8 Z8 f* c9 r1 R
Where:/ S& { r5 o& [( t' n2 c
Pno is the nameplate output power of the Unit Under Test.
* R* C6 t0 [. }% W, k2 y; u1 T"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.& Y% O6 @5 d; n
Table 4: High Efficiency requirements for maximum no-load power (Watts)4 z6 L. o6 f* p1 i; s+ V- T/ G
Nameplate Power Output (Pno) No Load Power- n3 O1 ^7 f) d! @/ _9 o
Watts) F( E6 T0 I' u# g
0 to ≤ 250 watts ≤ 0.5
$ D9 }- H' }8 |/ \- _Energy Performance Mark
7 o/ [5 N% r# W1 M% D, DThe 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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