Power Efficiencies
In response to changing regulations and customer requirements within the power industry, CUI is continuously looking for new technologies to keep our power product line ahead of the curve. We monitor the latest energy efficiency initiatives, ensuring our power supply products are in compliance and our customers are informed and up-to-date. Below you can review the international efficiency marking protocol for external power supplies and other industry external power regulations.
International Efficiency Marking Protocol for External Power Supplies
| Mark |
Performance Requirements
|
|
|
Nameplate Power Output (Pno)1
|
No- Load Power2
|
Nameplate Power Output (Pno)
|
Average Active Efficiency3
|
Power Factor
|
| III |
0 to < 10 watts
|
≤ 0.5
|
0 to 1 watt
> 1 to 49 watts
> 49 to 250 watts
|
≥ 0.49 x Pno
≥ 0.09 x Ln(Pno)+0.49
≥ 0.84
|
Not applicable
|
|
10 to 250 watts
|
≤ 0.75
|
|
|
|
| IV |
0 to 250 watts
|
≤ 0.5
|
0 to < 1 watt
|
≥ 0.5 x Pno
|
Not applicable
|
|
|
|
1 to 51 watts
|
≥ 0.09 x Ln(Pno)+0.5
|
|
|
|
> 51 to 250 watts
|
≥ 0.85
|
| V |
0 to < 50 watts
|
≤ 0.5 for ac-ac; ≤ 0.3 for ac-dc
|
0 to ≤ 1 watt
|
|
Power supplies with greater than or equal to 100 watts input power must have a true power factor of 0.9 or greater at 100% of rated load when tested at 115 volts @ 60Hz.
|
|
≥ 50 to ≤ 250 watts
|
≤ 0.5
|
> 1 to ≤ 49 watts
|
Standard: ≥ [0.0626 * Ln (Pno)] + 0.622
Low Voltage: ≥ [0.0750 * Ln (Pno)] + 0.561
|
|
|
|
> 49 to 250 watts
|
Standard: ≥ 0.870
Low Voltage: ≥ 0.860
|
External Power Regulations