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CEC certification

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Introduction to CEC Certification

CEC certification is an electrical energy efficiency regulation implemented by the California Energy Commission on December 30, 2005. The purpose of implementing this regulation is to improve the efficiency of electricity products, save energy, reduce gas emissions and greenhouse effects.

With more and more electronic products appearing in daily life, "energy conservation" will become an urgent problem that everyone must face in the 21st century. The California Energy Commission (CEC) is about to implement new mandatory standards for the energy efficiency of AC-DC and AC-AC external power supplies on July 1, 2006, which will impact almost all electronic products.

This standard will cover all products that use external power supplies (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 more efficiently in both standby and use states.

This means that after mid-2006, all transformers, external power supplies, adapters, and chargers used in the United States and intended for sale in the United States must undergo design changes.

In addition to energy conservation, CEC's new regulations will also have a significant impact on environmental protection. According to the company's statistics, if all external power supplies in California can comply with the new standards, California will be able to reduce carbon dioxide emissions by over 360000 tons per year, which is equivalent to the annual emissions of 60000 cars.

This regulation stipulates that electrical products must first comply with equipment energy efficiency regulations when sold in California, USA. This regulation specifies energy efficiency index requirements, measurement methods, and phased implementation plans for 58 categories of electrical products. According to this regulation, electrical products must be tested by a qualified laboratory in accordance with relevant regulations or standards in the United States before being sold in California.

 
Testing methods for CEC certification

ntroduction

CEC is the abbreviation for the California Energy Commission in the United States, which is responsible for driving the energy market towards healthy competition.

Since July 1, 2006, all external power supplies (AC/AC, AC/DC adapter) exported to California must meet the California Energy Efficiency Regulations issued by the California Energy Commission, which is a new energy efficiency regulation developed on the basis of Energy Star.

Below, let's analyze the specific scope, definition, testing, labeling, and precautions of CEC certification.

Range

The definition of CEC external power supply is as follows: AC/DC with single-phase voltage input or AC/AC external power adapter.
definition
Here, we will introduce some CEC test standards in terms such as:
(1) Active Mode: Operating mode. Refers to the mode in which the power supply is under operating conditions.
(2) Active Mode Efficiency: Working mode energy efficiency. Active mode efficiency is equal to the ratio of true output power to true input power in active mode. Usually expressed as a percentage.
(3) No Load: No-load mode. Refers to the mode in which the product is connected to the input voltage but not the load.
(4) No Load Power: No-load power. Refers to the input power of the product in no-load mode.
(5) UUT: is the 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 true lost 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, which 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 output voltage of the product specified by the customer on the nameplate.
(13) Nameplate Output Current: The output current of the customer's nominal product on the nameplate.
Test
(1) Overview:
Test adjustments, unless otherwise stated, are tested according to the following test conditions.
(2) Test Instruments:
Power measurements must be performed with a calibrated voltammeter or power analyzer. The instrument must be calibrated according to the standard of IEC 62301, and the error must be less than or equal to 0% when the test power is 5.2W. When the test power is less than 0.5W, the error must be less than 0.01W. The accuracy of the instrument for power testing must be 0.01W or better. Both the voltage and current tested must have an error of 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°C ±5°C, and the sample must be tested on a laboratory bench without heat conduction. Products used outdoors, if there are additional testing requirements, must be stated in the report.
(4) Test voltage
According to the standard requirements of IEC 62301, the fluctuation range of the test voltage cannot exceed ±1% of the specified test voltage and ±1% of the specified test frequency. If the input voltage of the nameplate is a wide voltage, the test voltage is 115V/60Hz and 230V/50Hz, if the nameplate is marked with a single voltage input, the test voltage is one of the above two test voltages close.
(5) Result judgment
The California Energy Efficiency Act stipulates that as of July 2006, 7, all external power supplies exported to California, USA, must meet the average energy efficiency requirements and no-load power requirements in the following table (see Table 1)
From January 2008, 1, all external power supplies exported to California, USA, must meet the new average efficiency regulations and no-load power requirements in Table 1 below (see Table 2)
All tests must take into account the load of 100%, 75%, 50%, 25% of the output current indicated on the nameplate (note: the error range of the load here cannot exceed ±2%), record its input power, input current, power factor, output voltage, and THD (total harmonic distortion) respectively, and then follow suit
Efficiency = (Output Voltage×Output Current) / Input Power
To calculate the current energy efficiency value, and then average the energy efficiency value measured under the four load conditions of 100%, 75%, 50%, 25% to obtain the average energy efficiency value, in addition, it is also necessary to test the input power value of the load with an output current of 0%, and the average energy efficiency value and no-load power value obtained by the above test are in accordance with the limit value requirements of TABLE1 and TABLE2 to determine which energy efficiency mark is met.


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