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Introduction
The CEC certification is an Appliance Efficiency Regulation that was legally implemented by the California Energy Commission on December 30, 2005. The purpose of this regulation is to improve the efficiency of electricity products, save energy, reduce gas emissions and greenhouse effect.
As more and more electronic products appear in daily life, “saving energy” will become an urgent problem that all people must face in the 21st century. The California Energy Commission (CEC) is about to implement a new mandatory standard for energy efficiency of AC-DC and AC-AC external power supplies on July 1, 2006. By then, almost all electronic products will Suffer shocks.
The 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 be used in standby and use. Use energy more efficiently.
This means that after mid-2006, all transformers, external power supplies, adapters, and chargers that are used in the United States and that are destined for the United States must change their designs.
In addition to saving energy, the new CEC regulations will also have a significant impact on environmental protection. According to the company’s statistics, if all California’s external power supplies can comply with the new standards, then California will be able to reduce more than 360,000 tons of CO2 emissions per year, which is equivalent to the annual emissions of 60,000 cars.
This regulation stipulates that when electrical products are sold in California, USA, they must first meet the energy efficiency regulations of the equipment, which specifies the energy efficiency index requirements, measurement methods, and plans for phased implementation of the 58 electrical products. In accordance with the requirements of this regulation, electrical products must be tested by qualified laboratories according to the relevant US regulations or standards, and they must be certified before they can be sold in California.
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CEC certified test method
CEC is the abbreviation of the California Energy Commission. Its responsibilities are to make the energy market develop in the direction of healthy competition.
From July 1, 2006, California where all external power supplies (AC/AC adaptors) are exported to the United States must meet California Energy Efficiency Regulations issued by the California Energy Commission. This California energy efficiency regulation is in the United States. A new energy efficiency regulation developed on the basis of Energy Star.
Below, we analyze the specific scope, definitions, tests, signs, and precautions of CEC certification.
range
The CEC's external power supply is defined as a single-phase voltage input AC/DC or AC/AC external power adapter.
definition
Here, we introduce some of the CEC test standards in terms of
(1) Active Mode: Operation mode. Refers to the mode of operation of the power supply.
(2) Active Mode Efficiency: Energy efficiency in working mode. The energy efficiency of the operating mode is equal to the ratio of the true output power in the operating mode to the true input power. 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 is not connected 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 for 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 power loss/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: The input voltage on the nameplate refers to the input voltage of the product declared by the customer on the label.
(11) Nameplate Input Frequency: The frequency of the customer's declared input voltage on the nameplate.
(12) Nameplate Output Voltage: Customer's nominal product output voltage on the nameplate.
(13) Nameplate Output Current: The nominal product output current of the customer on the nameplate.
test
(1) Summary:
Test regulation, unless otherwise stated, is tested according to the following test conditions.
(2) Test Instruments:
Power measurements must be tested with a calibrated volt-ampere meter or power analyzer. The instrument must be calibrated according to the IEC 62301 standard. 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 power test instrument must have an accuracy of 0.01 W or better. The voltage and current errors must both 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 23°C±5°C, and the sample must be tested on a test bench without heat conduction. . Products for outdoor use, if any additional test 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 shall not exceed ±1% of the specified test voltage and ±1% of the specified test frequency. If the input voltage on the nameplate is wide, the test voltage is 115V/60Hz and 230V/50Hz. If the nameplate indicates a single voltage input, the test voltage is one of the two test voltages.
(5) Result judgment
The California Energy Conservation Law stipulates that starting from July 1, 2006, all external power outlets in California must meet the following average energy efficiency regulations and no-load power requirements (see Table 1).
From January 1, 2008, all external power supplies exported to California must meet the new average energy efficiency regulations and no-load power requirements in the following table TABLE2 (see Table 2).
All tests must take into account the 100%, 75%, 50%, and 25% load conditions of the output current indicated on the nameplate (note: the error range of the load here cannot exceed ±2%), record the input power, Input current, power factor, output voltage, and THD (Total Harmonic Distortion), then follow
Energy efficiency = (output voltage × output current) / input power
To calculate the current energy efficiency value, and then average the energy efficiency values measured under the four load conditions of 100%, 75%, 50%, and 25% to obtain the average energy efficiency value. In addition, the output current must be tested with a load of 0%. The input power value, the average energy efficiency value and the no-load power value obtained from the above test are determined according to the limits of TABLE1 and TABLE2 to determine which energy efficiency label is met.