CEC certification is the appliance efficiency regulation implemented by California Energy Commission on December 30, 2005. The purpose of the regulation is to improve the efficiency of electric products, save energy, reduce gas emissions and greenhouse effect.

With more and more electronic products appearing in daily life, "saving energy" will become an urgent problem that everyone must face in the 21st century. On July 1, 2006, the California Energy Commission (CEC) will implement a new mandatory standard for the energy efficiency of AC-DC and AC-AC external power supply. At that time, almost all electronic products will be impacted.

The standard will cover all products using external power supply (such as chargers and adapters), including mobile phones, home wireless phones, portable music players, handheld game consoles, toys, etc., and require these products to use energy in a more efficient way in standby and use state.

This means that after the middle of 2006, all transformers, external power supplies, adapters and chargers used in the United States and sold to the United States must be changed in design.

In addition to saving energy, CEC's new regulations will also have a significant impact on environmental protection. According to the company, if all California's external power supplies comply with the new standards, California will be able to reduce more than 360000 tons of carbon dioxide emissions per year, equivalent to 60000 cars per year.

According to the regulation, electrical products must first meet the equipment energy efficiency regulations when they are sold in California, the regulation specifies the energy efficiency index requirements, measurement methods and phased implementation plans for 58 types of electrical products. According to the regulations, electrical products must be tested by qualified laboratories according to the corresponding regulations or standards of the United States, and can be sold in California only after they are proved to meet the requirements.

Range

The definition range of CEC's external power supply is: AC / DC of single-phase voltage input or external power adapter of AC / AC.

Definition

Here, we will introduce some terms in CEC test standards, such as

(1) active mode: operation mode. Refers to the mode in which the power supply is operating.

(2) active mode efficiency: working mode energy efficiency. Working mode energy efficiency is equal to the ratio of real output power and real input power in working mode. Usually expressed as a percentage.

(3) no load: no load mode. It refers to the mode when the product is connected to the input voltage but not to the load.

(4) no load power: no load power. Refers to the input power of the product in no-load mode.

(5) UUT: abbreviation of unit under test.

(6) ambient temperature: ambient temperature. Refers to the ambient temperature tested at that time.

(7) power factor (true): power factor. Its value is equal to the ratio of real loss power to apparent power.

(8) total harmonic distortion (THD): total harmonic distortion.

(9) apparent power (s): apparent power. The product of the input voltage and the input current.

(10) nameplate input voltage: nameplate input voltage refers to the input voltage of the product declared by the customer on the label.

(11) nameplate input frequency: the frequency of the input voltage declared by the customer on the nameplate.

(12) nameplate output voltage: the customer's nominal product output voltage on the nameplate.

⒀ nameplate output current: the customer's nominal product output current on the nameplate.

test

(1) Summary:

Test conditioning, unless otherwise specified, is carried out in accordance with the following test conditions.

(2) test

Instrument: the power measurement must be carried out with a calibrated volt ampere meter or power analyzer. The instrument must be calibrated according to IEC 62301. When the test power is 0.5W, the error must be less than or equal to 2%. When the test power is less than 0.5W, the error must be less than 0.01W.  The accuracy of the power test instrument must be 0.01W or better. The test voltage and current error must be less than or equal to 2%.

(3) test room

According to the requirements of IEC 62301, the air flow in the test room must be 0.5m/s or less, the ambient temperature must be controlled within the range of 23 ℃± 5 ℃, and the samples must be placed on the test bench without heat conduction. If there are additional test requirements for products used outdoors, they must be described in the report.

(4) test voltage

According to IEC 62301, the fluctuation range of the test voltage shall not exceed ± 1% of the specified test voltage and ± 1% of the specified test frequency. If the input voltage marked on the nameplate is wide voltage, the test voltage is 115V / 60Hz and 230V / 50Hz. If the nameplate is marked with single voltage input, the test voltage is one of the close two test voltages.

(5) result judgment

California energy efficiency law stipulates that from July 1, 2006, all external power supplies exported to California must meet the average energy efficiency regulations and no-load power requirements in the following table (see Table 1)

Since January 1, 2008, all external power supplies exported to California must meet the new average energy efficiency regulations and no-load power requirements in Table 2 below (see Table 2)

All tests must take into account 100%, 75%, 50% and 25% of the output current indicated on the nameplate (Note: the error range of the load here cannot exceed ± 2%), respectively record its input power, input current, power factor, output voltage, and thd (total harmonic distortion), and then

Energy efficiency = (output voltage × output current) / input power

To calculate the current energy efficiency value,