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MEPS Levels" N7 H+ g6 y9 g' J/ W3 i& i9 \ ]
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.
6 P1 F. Y3 d7 j5 _: n9 _$ F3 ^MEPS requirements are shown in Table 1 and Table 2 below:9 L8 M/ [4 I/ d+ E* \$ s0 ?% ^
Table 1: MEPS required minimum efficiency level$ s% F- A' @1 p8 w. W4 Y# q7 G/ f8 b
Nameplate Power Output (Pno) Average Efficiency* ]5 o. n5 C% x: V( c& l8 A n
0 to 1 watt ≥ 0.49 x Pno7 B4 z# i( T: B2 R( q9 i- w0 L3 U
> 1 to 49 watts ≥ 0.09Ln(Pno)+0.49! b/ \4 r4 L- D& y- _3 D' v7 Y
> 49 to 250 watts ≥ 0.84
6 p# E2 j3 B1 i0 O$ G; [ G& BWhere:9 f) |: Z/ K! @' {+ t) g# T
Pno is the nameplate output power of the Unit Under Test.
( g' A# n- k+ [" Q8 b' _/ \- z"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.* R. x2 D* P: T5 e" n* U6 R" ]# `
Table 2: MEPs required maximum no-load power (Watts)
/ v: N- H, }; D' }Nameplate Power Output (Pno) No Load Power$ }7 p1 @. t; F) h6 [$ X
Watts AC-DC No Load Power3 k1 L+ ^. V& H3 c1 D
Watts AC-AC. {0 R: C- b7 _, J% N" s7 W
0 to < 10 watts ≤ 0.5 N/A, w. q+ I) }) ]( H5 D6 t5 k2 ?
10 to 250 watts ≤ 0.75 N/A
! u+ _" v# R. fHigh Efficiency Levels
+ v) c: [" X0 V: }$ cMinimum efficiency levels for "High Efficiency Power Supplies", are shown in Table 3 below.7 Z9 j1 t- S9 M* d( H+ c
Table 3: Efficiency requirements for 'high efficiency' external power supplies6 ]0 p3 S6 J( N; V& `: B
Nameplate Power Output (Pno) Average Efficiency) U; |" A2 n4 B
0 to 1 watt ≥ 0.5 x Pno6 e2 _1 h3 I s- [! G
> 1 to 51 watts ≥ 0.09Ln(Pno)+0.5
0 I& z$ ^4 K; P3 o5 l> 51 to 250 watts ≥ 0.85* X m7 S2 [# t* c: J
Where:
! V. H8 H2 ?4 g6 ~1 H# a8 WPno is the nameplate output power of the Unit Under Test.
. x: Q& ^1 }6 ^- l"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.
$ O. u) Q( C! j* o: jTable 4: High Efficiency requirements for maximum no-load power (Watts): l" ]# A6 f, e B+ M# U
Nameplate Power Output (Pno) No Load Power
$ f! {/ w. @$ N; o9 \) jWatts
! R8 ?6 n' M2 }0 u% z1 C2 t! j0 to ≤ 250 watts ≤ 0.5" z8 f# ~0 h. @0 v$ c$ h+ h5 U2 N
Energy Performance Mark
3 w" I, b. ?7 X' w/ ]+ QThe 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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