|
MEPS Levels
, D: C* U9 q3 R6 Y$ P0 wEnergy 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.
2 |! G8 L- |8 JMEPS requirements are shown in Table 1 and Table 2 below:+ l( K. z; P9 E( W
Table 1: MEPS required minimum efficiency level
# G( S1 ], W( sNameplate Power Output (Pno) Average Efficiency! T/ `7 `+ _% d* M. @% e, S
0 to 1 watt ≥ 0.49 x Pno
/ p3 |$ H' T0 c. C6 U; l X> 1 to 49 watts ≥ 0.09Ln(Pno)+0.49
& q* B8 a0 A3 O7 I3 i z> 49 to 250 watts ≥ 0.84( b5 a1 [- d' ~ Z# _. K P, x
Where:: Y L. Y6 `6 G$ G) ~
Pno is the nameplate output power of the Unit Under Test.
+ b' |* U7 ?4 I3 f# M"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.
" o5 ?( y2 |& j- ?% `/ x0 ~% I2 xTable 2: MEPs required maximum no-load power (Watts)7 l2 l6 F" H$ O6 k, w. P9 h
Nameplate Power Output (Pno) No Load Power
. F) T* a: M1 B1 ` FWatts AC-DC No Load Power
5 ?. h+ ~9 q& Q; C" lWatts AC-AC, L0 D! J& s% a
0 to < 10 watts ≤ 0.5 N/A) e. M0 D7 L( j: S
10 to 250 watts ≤ 0.75 N/A# G, r x9 u* |# a, q* S" w) s
High Efficiency Levels) ?$ u5 n5 y1 m' ~
Minimum efficiency levels for "High Efficiency Power Supplies", are shown in Table 3 below.% g4 o( o" t! b8 P' P9 J6 |7 s+ @& y9 {
Table 3: Efficiency requirements for 'high efficiency' external power supplies
* |' z8 A8 G* @# n$ } i+ UNameplate Power Output (Pno) Average Efficiency
5 C' n6 V/ P3 Y% h3 t$ y% P0 to 1 watt ≥ 0.5 x Pno
: o& H: V3 i/ U; `( q+ ?" [> 1 to 51 watts ≥ 0.09Ln(Pno)+0.5
0 A$ x+ ~3 L7 o% `9 f> 51 to 250 watts ≥ 0.85' [7 h9 _1 E! ]
Where:9 s# O9 e3 B3 z
Pno is the nameplate output power of the Unit Under Test.5 b+ P/ O% V# o. B+ }
"Ln" refers to the natural logarithm (base e). The algebraic order of operations requires that the natural logarithm calculation be performed first.
7 Y) O1 z- @8 Y7 { ?* [; eTable 4: High Efficiency requirements for maximum no-load power (Watts)$ i8 p7 U# E! M: y+ c* E9 E5 L
Nameplate Power Output (Pno) No Load Power
0 p8 F5 [: G; h0 D4 B5 N f8 {Watts( c! s5 f# G# f* A2 H$ I
0 to ≤ 250 watts ≤ 0.5
- f& q5 y) w) T+ z/ O% yEnergy Performance Mark
8 X8 m6 O; H8 [0 Q {/ 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. |
|