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MEPS Levels2 X; W/ w$ B* b
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.
/ O% F0 N# j; u' [5 `) i4 TMEPS requirements are shown in Table 1 and Table 2 below:
; m: r- k7 w& U# R [- r3 x G; jTable 1: MEPS required minimum efficiency level, g$ o6 V3 J! S6 x1 l* m
Nameplate Power Output (Pno) Average Efficiency
4 A M* V9 h2 h3 P* V0 to 1 watt ≥ 0.49 x Pno& ~% C8 ?0 l( H) I
> 1 to 49 watts ≥ 0.09Ln(Pno)+0.49, g0 W/ K6 P1 Q0 k9 t" v& j
> 49 to 250 watts ≥ 0.84- j8 ^! M5 H& l- @- E
Where:" S# R4 \+ t' ^/ ?0 I0 O+ \
Pno is the nameplate output power of the Unit Under Test.5 n: P% P1 R) @: b( _
"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.8 b( y( ~+ M5 ~& r' [3 K
Table 2: MEPs required maximum no-load power (Watts)
6 [* Q, t% C* Y, [+ H/ xNameplate Power Output (Pno) No Load Power7 M o* {8 a! l: o
Watts AC-DC No Load Power
1 x1 S! {0 P% {8 lWatts AC-AC
' P, x6 u2 s V1 Q- Z0 to < 10 watts ≤ 0.5 N/A
! {' ?% d" i( S' B/ A, E10 to 250 watts ≤ 0.75 N/A& r5 n( @$ d. F o) _" s
High Efficiency Levels- h7 O2 x2 O* o4 @
Minimum efficiency levels for "High Efficiency Power Supplies", are shown in Table 3 below.# h* b$ O$ m; p3 O* E" Q3 O
Table 3: Efficiency requirements for 'high efficiency' external power supplies
8 X; p1 v# X% ?3 m" k& P, g, Q9 TNameplate Power Output (Pno) Average Efficiency
; _" k9 z/ o) t0 ^) l0 to 1 watt ≥ 0.5 x Pno
. O1 _* K0 l7 u( O" f; N> 1 to 51 watts ≥ 0.09Ln(Pno)+0.5) ?! e j" B8 X
> 51 to 250 watts ≥ 0.85
1 o1 Z6 [* o9 J! J% X3 B7 S9 vWhere:( k2 a! z5 ^7 s4 s
Pno is the nameplate output power of the Unit Under Test., [4 l c# l& m1 V& K: N
"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.. I0 q$ N+ P0 h4 a! x
Table 4: High Efficiency requirements for maximum no-load power (Watts): P, F: q& k. {3 e
Nameplate Power Output (Pno) No Load Power3 V$ b) p, B- @; s% U
Watts i9 s7 o/ l9 _3 Z: p, @* x
0 to ≤ 250 watts ≤ 0.5. s+ t J) D8 m+ J
Energy Performance Mark; `! f- z' t- \% ^$ O& H; @# c ]* Y
The 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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