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MEPS Levels7 `. x7 U- W* {
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.
. s# _& H8 s$ a% O4 w* V$ ZMEPS requirements are shown in Table 1 and Table 2 below:1 W: O9 Y- k$ z5 s* q1 W7 Z
Table 1: MEPS required minimum efficiency level
" n( o* K% x1 v" ZNameplate Power Output (Pno) Average Efficiency
* f6 y5 }# H* {9 h+ w0 to 1 watt ≥ 0.49 x Pno( A1 x" N% p) r( H) j/ M5 g
> 1 to 49 watts ≥ 0.09Ln(Pno)+0.497 l7 [& R) L7 X/ m! T* s
> 49 to 250 watts ≥ 0.84
' @1 V2 S2 {/ I0 g' V. hWhere:, z2 w; ]# {6 s1 J& M2 |
Pno is the nameplate output power of the Unit Under Test.$ H$ E1 a6 S7 e$ B) Y
"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.! d9 `) k9 z0 L, _1 _! f s' a
Table 2: MEPs required maximum no-load power (Watts)7 j& M, P+ ], M7 T5 w
Nameplate Power Output (Pno) No Load Power
7 n# s+ j- L- g7 V6 c. q' `" j+ wWatts AC-DC No Load Power$ H# d$ G3 k6 E
Watts AC-AC
) m; U5 C* g+ U7 s# W! e0 to < 10 watts ≤ 0.5 N/A& M' l. W" R& K) b- B
10 to 250 watts ≤ 0.75 N/A
: S6 W9 _' P U) rHigh Efficiency Levels
}5 o5 n+ [8 ]( OMinimum efficiency levels for "High Efficiency Power Supplies", are shown in Table 3 below.
% P) Q/ [! T( R+ i1 t+ U' j6 x" p3 wTable 3: Efficiency requirements for 'high efficiency' external power supplies
8 S% T9 s% G: PNameplate Power Output (Pno) Average Efficiency0 E: |/ O9 d; S! w5 V# x! i. j. P
0 to 1 watt ≥ 0.5 x Pno
( V* M# Y8 U# [8 u2 |) P> 1 to 51 watts ≥ 0.09Ln(Pno)+0.5
' _& N) y3 ^6 P6 n7 _> 51 to 250 watts ≥ 0.85
; i; C; ~0 d( y4 G! OWhere:
& R% f( f$ g9 R( u4 IPno is the nameplate output power of the Unit Under Test.3 q- q- @1 f+ y) M9 R( r* H6 e
"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.3 q# E4 y* w- {) J. z# _6 m1 C Q" l; O
Table 4: High Efficiency requirements for maximum no-load power (Watts)
8 K/ w& g) T) ^ [+ X; n' h9 kNameplate Power Output (Pno) No Load Power
2 j9 P8 y& s' [; y# d7 _% P% qWatts2 [4 {7 u4 z4 ?% W. g
0 to ≤ 250 watts ≤ 0.5# F! K, m' x) m9 G, w' \$ W. d
Energy Performance Mark
L% p# J2 s1 U$ tThe 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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