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MEPS Levels' @& D- _/ }: i* J" p
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.& H9 t5 p* x' b: f/ }; G8 X2 t8 n
MEPS requirements are shown in Table 1 and Table 2 below:+ _2 d2 ^0 \* K& K7 U* D& d
Table 1: MEPS required minimum efficiency level
) r0 w7 A" m0 M8 v: M( b9 C* v/ b7 SNameplate Power Output (Pno) Average Efficiency" J6 n% B, O8 Q. C" s- P! f6 i
0 to 1 watt ≥ 0.49 x Pno3 R' ^0 O1 P/ k, k9 {
> 1 to 49 watts ≥ 0.09Ln(Pno)+0.49
2 F9 y% s; T9 o2 R* t> 49 to 250 watts ≥ 0.84
, K8 N# ?0 h0 g# e J6 BWhere:
H! |5 f7 d( ]. PPno is the nameplate output power of the Unit Under Test.
; x. I, M1 L# q2 x" G+ F"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.
8 N* c( C. V2 N: p7 R4 d4 k! H+ iTable 2: MEPs required maximum no-load power (Watts)
/ v: C6 ^* j6 e) dNameplate Power Output (Pno) No Load Power
, }, y# U3 d' }7 Y8 C2 n4 N' t9 iWatts AC-DC No Load Power
3 z4 E Y6 u6 s5 e) Q6 ?% Y* N1 a% v9 [Watts AC-AC; V( R5 b3 \) T* B! r
0 to < 10 watts ≤ 0.5 N/A" O+ |4 V1 t+ }( D" K% n: q+ O
10 to 250 watts ≤ 0.75 N/A0 R. E1 Q* Z; K
High Efficiency Levels5 c* r4 @. a P, G0 H5 n% }
Minimum efficiency levels for "High Efficiency Power Supplies", are shown in Table 3 below." O" K @1 _6 M7 @; D- f3 }
Table 3: Efficiency requirements for 'high efficiency' external power supplies/ Z7 p+ Y( ` t
Nameplate Power Output (Pno) Average Efficiency
. w3 H6 E( H4 s" \4 L0 to 1 watt ≥ 0.5 x Pno; j2 N* ]' p X2 ?7 N5 p
> 1 to 51 watts ≥ 0.09Ln(Pno)+0.5
% ^2 U, ?, H; }> 51 to 250 watts ≥ 0.85
) O/ d, i5 T- ?1 ?Where:, |9 {( M7 k2 r9 V$ X
Pno is the nameplate output power of the Unit Under Test.
5 `# n( ~) [( X- P) i7 x+ [2 L"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.( g" |3 {2 W+ X
Table 4: High Efficiency requirements for maximum no-load power (Watts)
7 l u3 B* p& q" O+ kNameplate Power Output (Pno) No Load Power/ k+ q, C6 S$ e+ d2 g
Watts
; x5 P* N' p$ \5 z: s0 to ≤ 250 watts ≤ 0.5
+ f6 b# B$ M) V7 L" g6 ~Energy Performance Mark& H7 j9 k; I/ `
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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