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MEPS Levels
& e# P2 q) C. P7 iEnergy 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.
: ], _! |* ]( i8 O! U* A9 z1 gMEPS requirements are shown in Table 1 and Table 2 below:9 I0 R9 f: Z. m$ l8 n8 U \* y
Table 1: MEPS required minimum efficiency level( B5 w. f, L/ t* g
Nameplate Power Output (Pno) Average Efficiency( [5 y1 ^) N5 }/ ]2 v
0 to 1 watt ≥ 0.49 x Pno
f* F. N$ W/ P# z> 1 to 49 watts ≥ 0.09Ln(Pno)+0.49; ~% e7 G0 J# i$ t& _2 J
> 49 to 250 watts ≥ 0.84& L, r. S6 T% H ~9 O/ ~- l
Where:
3 k: h# v8 A/ j4 I' o# y! S0 l4 @Pno is the nameplate output power of the Unit Under Test.
& A0 w) e5 S: C+ u/ ~0 {. \"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.
% N$ Z u# C0 ^5 V, UTable 2: MEPs required maximum no-load power (Watts)
$ Y/ P, u8 q$ G6 i/ F' s% Z2 z8 D- @Nameplate Power Output (Pno) No Load Power& j; ^' h! A U0 \9 B
Watts AC-DC No Load Power& f' P4 U2 Q/ [* b0 V
Watts AC-AC
/ {$ L; M- e* Q- J+ P0 to < 10 watts ≤ 0.5 N/A: y3 _3 \: A) P. K6 w
10 to 250 watts ≤ 0.75 N/A
! k3 r/ r4 k a0 CHigh Efficiency Levels
* y# M* y# B0 s0 z% G& DMinimum efficiency levels for "High Efficiency Power Supplies", are shown in Table 3 below.
; p9 X F/ A8 p" f# ]2 ^8 e, h& r# ]Table 3: Efficiency requirements for 'high efficiency' external power supplies! L! C6 J3 J$ d9 O; Y1 ^2 j/ p
Nameplate Power Output (Pno) Average Efficiency
6 Z; H1 e* b7 R& n; b0 K4 \ _1 w0 to 1 watt ≥ 0.5 x Pno, L7 h/ E' }! ^" @! f' ~! i* {4 \
> 1 to 51 watts ≥ 0.09Ln(Pno)+0.5/ i& R% x& g' r5 D) h6 _: J: |
> 51 to 250 watts ≥ 0.85
s: P/ l+ E: QWhere:
) P, N) j8 c) a( C7 q: }Pno is the nameplate output power of the Unit Under Test.
, a& y7 [) E, k3 L* g) B2 @3 }"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.
( S2 d' M- g( q+ Z( t# `Table 4: High Efficiency requirements for maximum no-load power (Watts)- ?% ^: f' D# C% D
Nameplate Power Output (Pno) No Load Power
* W/ _& ~8 q4 W- xWatts
0 _% M) V3 q, g c+ [0 to ≤ 250 watts ≤ 0.54 U# p6 p% a! q' K- l
Energy Performance Mark
: X" [4 s3 X$ bThe 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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