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MEPS Levels, ~; Z+ b$ A9 E% E |* s, C
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.
* [; L0 R0 C8 f" T z( dMEPS requirements are shown in Table 1 and Table 2 below:9 v/ w( P! _8 F4 ^5 O9 V( }* ]2 D
Table 1: MEPS required minimum efficiency level$ K3 k3 K: ~0 z) i" r* g
Nameplate Power Output (Pno) Average Efficiency/ \: u$ ?2 o. I3 O- K9 j$ _/ x
0 to 1 watt ≥ 0.49 x Pno
: ^% C+ V/ B+ u8 w+ }> 1 to 49 watts ≥ 0.09Ln(Pno)+0.498 b' t7 ~/ U! Q3 y% l
> 49 to 250 watts ≥ 0.84
1 B9 T( D$ j8 z) |4 s& F7 }$ ^Where:
0 S3 S6 ~! o1 U+ s% ?Pno is the nameplate output power of the Unit Under Test.! h7 ?! n. j. m% G( Q& {9 l7 i
"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.9 F2 D) r+ W- j6 V v$ _! ^8 w j
Table 2: MEPs required maximum no-load power (Watts)9 W" O6 G! M) `
Nameplate Power Output (Pno) No Load Power0 j. W- Q' V% r7 U: g j$ z* T+ D! {( m
Watts AC-DC No Load Power
1 d" h" Z( k7 p0 [- V/ n1 q& w; n0 @$ mWatts AC-AC4 a* P. g3 c1 F3 A9 m S1 M# Q4 a% ~/ a6 s
0 to < 10 watts ≤ 0.5 N/A) |% F4 l7 j+ j8 V9 c v! ^- t
10 to 250 watts ≤ 0.75 N/A- u6 A: [$ i6 q; s" c
High Efficiency Levels
/ L1 z- {; n1 {" `0 _6 ~5 P b3 UMinimum efficiency levels for "High Efficiency Power Supplies", are shown in Table 3 below.
+ t% T- u( r9 o% e" W( a _+ z3 CTable 3: Efficiency requirements for 'high efficiency' external power supplies* w+ C7 b- F3 c+ e9 h3 Z9 \
Nameplate Power Output (Pno) Average Efficiency3 m6 ^& V1 p; c: q. b) F! F
0 to 1 watt ≥ 0.5 x Pno/ _* P" g9 d( Z" t
> 1 to 51 watts ≥ 0.09Ln(Pno)+0.5$ y; k0 U, z9 j: S8 N6 g
> 51 to 250 watts ≥ 0.85' w6 Z+ o& u( m4 H7 z
Where:: [+ S! C) n. H
Pno is the nameplate output power of the Unit Under Test.
1 p8 O0 T2 f# ~1 F" P"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.
. i. Y0 U$ ~8 _* J8 ITable 4: High Efficiency requirements for maximum no-load power (Watts)+ @+ x/ V9 M. I }& ?
Nameplate Power Output (Pno) No Load Power4 c: q1 K, h! ?4 U# \) a/ c' u
Watts9 ~- h7 h1 E) h0 q! A7 U
0 to ≤ 250 watts ≤ 0.5
! [. i1 l( W) O$ g5 q7 {* eEnergy Performance Mark
, Y6 ?6 X/ b; OThe 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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