CEC Certification Introduction
CEC certification is implemented by the California Energy Commission (California Energy Commission) on December 30, 2005 by law Appliance Efficiency Regulation (Appliance Efficiency Regulation). The purpose of the regulation is to improve the efficiency of electrical products, save energy, reduce gas emissions and greenhouse effect.
As more and more electronic products appear in our daily lives, "energy conservation" will become an urgent issue for all people in the 21st century. The California Energy Commission (California Energy Commission, CEC) will soon implement a new mandatory standard for the energy efficiency of AC-DC and AC-AC external power supplies on July 1, 2006, when almost all electronic products will be subject to impact.
The standard will cover all the use of external power supply (such as chargers and adapters) products, including cell phones, home wireless phones, portable music players, handheld game consoles, toys, etc., and require these products in standby and use state in a more efficient way to use energy.
This means that after mid-2006, all transformers, external power supplies, adapters, and chargers used in the U.S. and to be sold to the U.S. will have to change their design.
In addition to energy savings, the CEC's new specifications will also have a significant impact on the environment. According to the company, if all California's external power supplies were to comply with the new standards, California would be able to reduce carbon dioxide emissions by more than 360,000 tons per year, an amount equivalent to the annual emissions from 60,000 cars.
The regulation requires that electrical products sold in California must first meet equipment efficiency regulations, which set energy efficiency requirements, measurement methods and phase-in plans for 58 categories of electrical products. According to this regulation, electrical products must be tested by qualified laboratories in accordance with the corresponding U.S. regulations or standards and proven to meet the requirements before they can be sold in the State of California.
Test Methods for CEC Certification
Introduction
CEC is the abbreviation of California Energy Commission, whose responsibility is to make the energy market develop towards healthy competition.
Starting from July 1, 2006, all external power supplies (AC/AC, AC/DC adaptor) exported to the United States of California must meet the California Energy Efficiency Code issued by the California Energy Commission, which is a new energy efficiency code based on the U.S. Energy Star.
Below, we will analyze the specific scope, definition, test, logo and notes of CEC certification.
Scope
The scope of the CEC definition of external power supply is: single-phase voltage input AC/DC or AC/AC external power adapter.
Definition
Here we will introduce some terms in the CEC test standard, such as
(1) Active Mode : Operating mode. Refers to the mode of the power supply in operating condition.
(2) Active Mode Efficiency: Operating mode energy efficiency. Active Mode Efficiency is equal to the ratio of the true output power and the true input power in the operating mode. It is 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. It refers to the input power of the product in the no load mode.
(5) UUT ：It is the abbreviation of UNIT UNDER TEST.
(6) Ambient Temperature ： Ambient temperature. Refers to the ambient temperature of the test.
(7) Power Factor (True): Power factor. Its value is equal to the ratio of true loss power/apparent power.
(8) Total Harmonic Distortion (THD): Total harmonic distortion.
(9) Apparent Power (S): Apparent power. The product of input voltage and input current.
(10) Nameplate Input Voltage: Nameplate input voltage, which refers to the input voltage of the product claimed by the customer on the label.
(11) Nameplate Input Frequency : The frequency of the input voltage claimed by the customer on the nameplate.
(12) Nameplate Output Voltage: The output voltage of the product claimed by the customer on the nameplate.
(13) Nameplate Output Current: The output current of the product as stated by the customer on the nameplate.
Test
(1) Summary:
Test conditioning, unless otherwise specified, is performed in accordance with the following test conditions.
(2) Test instrumentation:
Power measurements must be performed with a calibrated voltameter or power analyzer. The instrument must be calibrated according to IEC 62301 standard, in the test power in 0.5W, the error must be less than or equal to 2%. 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 standard 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 sample must be placed on the test bench without heat conduction for testing. For products used outdoors, if there are additional testing requirements, they must be stated in the report.
(4) Test voltage
According to the standard requirements of IEC 62301, the fluctuation range of the test voltage must not exceed ±1% of the specified test voltage, and ±1% of the specified test frequency. If the nameplate labeled input voltage is wide voltage, the test voltage is 115V/60Hz and 230V/50Hz two cases, if the nameplate labeled single voltage input, the test voltage is one of the two test voltages close to the above.
(5) Judgment of results
California Energy Efficiency Law requires 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)
As of January 1, 2008, all external power supplies exported to California must meet the new average energy efficiency requirements and no-load power requirements in Table TABLE2 (see Table 2)
All tests must take into account 100%, 75%, 50%, and 25% load cases at the nameplate output current (note: the error range of the load here must not exceed ±2%), and record the input power, input current, power factor, output voltage, and THD (total harmonic distortion), respectively, and then follow
Energy efficiency = (output voltage × output current)/input power
The average energy efficiency value and no-load power value obtained from the above tests will be used to determine whether the energy efficiency mark is met in accordance with the limit values of TABLE1 and TABLE2.
