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MEPS Levels6 {! B9 m1 N/ m, y7 B& Y8 h
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.
9 X" @& U$ C! D$ K8 {MEPS requirements are shown in Table 1 and Table 2 below:
' ], ^! `) D+ [3 ^Table 1: MEPS required minimum efficiency level
# T6 K$ F F9 \' }* @Nameplate Power Output (Pno) Average Efficiency
3 @0 |) Z" `3 [- ?5 ?+ g+ D0 to 1 watt ≥ 0.49 x Pno- \8 \% Y/ I+ I" ^2 s5 i/ {; Y& G
> 1 to 49 watts ≥ 0.09Ln(Pno)+0.49
7 S% b0 F5 K& \ h% }> 49 to 250 watts ≥ 0.84
: b$ t& b* ~1 r9 Y' C, k' BWhere:
' t0 o* F" T; F; i4 d. K6 [Pno is the nameplate output power of the Unit Under Test.
s0 B3 P/ @3 U& Z9 d* O u5 {"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.3 O1 [8 V; B+ g, I- R5 O
Table 2: MEPs required maximum no-load power (Watts)
8 u; p" a, Y) t/ LNameplate Power Output (Pno) No Load Power
1 k5 [# C- i, x( kWatts AC-DC No Load Power% p& S4 W5 M1 m l: P
Watts AC-AC% q4 P, X3 k4 g' J& [) w
0 to < 10 watts ≤ 0.5 N/A
% `$ U4 k3 W: s! w' I8 V5 b7 `. @10 to 250 watts ≤ 0.75 N/A
$ r8 `; o+ b3 |, g- zHigh Efficiency Levels; y# j3 l8 y; ^! d! ^
Minimum efficiency levels for "High Efficiency Power Supplies", are shown in Table 3 below.
1 c5 l6 C2 M: [2 a+ V* z2 QTable 3: Efficiency requirements for 'high efficiency' external power supplies. C ^8 e0 J% x; G7 y s
Nameplate Power Output (Pno) Average Efficiency7 ?" S! `# v) X# a
0 to 1 watt ≥ 0.5 x Pno
/ a3 s& Z2 x/ w) A. `3 p> 1 to 51 watts ≥ 0.09Ln(Pno)+0.50 f* ~2 R6 ^2 F e0 s
> 51 to 250 watts ≥ 0.85
3 Y& L! r& I( l$ ^: MWhere: M( x' R9 L4 ^, z$ m" C
Pno is the nameplate output power of the Unit Under Test.
9 F6 Z+ Y1 e, a9 Q% m"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.
4 E1 m. M! N4 W8 l% N; ]Table 4: High Efficiency requirements for maximum no-load power (Watts)
4 M& G6 Q# W8 S" U- R* cNameplate Power Output (Pno) No Load Power
" m* l8 y0 y4 Z" k1 @5 dWatts
" {* L1 `* [5 y! G; A0 to ≤ 250 watts ≤ 0.5* m. ?2 }1 w3 O! l
Energy Performance Mark& z7 w' e/ R7 R- r
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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