Introduction to CEC certification

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 electricity products, save energy, reduce gas emissions and greenhouse effect.  

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

The standard will cover all products using external power supplies (such as chargers and adapters), including mobile phones, home wireless phones, portable music players, handheld game machines, toys, etc., and require these products to use energy more efficiently in standby and use conditions.  

This means that after mid-2006, all transformers, external power supplies, adapters, chargers used in the United States and to be sold in the United States must be designed differently.  

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 could reduce carbon dioxide emissions by more than 360000 tons a year, equivalent to 60000 cars per year.  

The regulation stipulates that electrical products must first meet the equipment energy efficiency regulations when they are sold in California, USA. the regulation specifies energy efficiency index requirements, measurement methods and phased implementation plan for 58 categories of electrical products. According to the requirements of the regulation, 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 of the United States after proving that they meet the requirements.

CEC certification test methods:

1. Introduction

CEC is the abbreviation of California Energy Commission. Its responsibility is to make the energy market develop towards the direction of benign competition.  

Since July 1, 2006, all external power (AC / AC, AC / DC adaptor) exported to California must meet the California energy efficiency regulations issued by the California Energy Commission. This California energy efficiency regulation is a new energy efficiency regulation developed on the basis of energy star of the United States.

2. Scope

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

3. Definition

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

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

(2) active mode efficiency: working mode energy efficiency. The energy efficiency of the working mode is equal to the ratio of the real output power and the real input power in the working 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. Refers to the input power of the product in no-load mode.  

(5) UUT: it is the abbreviation of unit under test.  

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 power loss to apparent power.  

Total harmonic distortion (THD): total harmonic distortion.  

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

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

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

(12) nameplate output voltage: the nominal output voltage of the product on the name plate.  

⒀ nameplate output current: the nominal output current of the product on the name plate.  

4. Testing

(1) Summary:  

Test adjustment, unless otherwise specified, is conducted according to the following test conditions.  

(2) testing instrument:  

The power measurement must be performed with a calibrated volt ampere meter or power analyzer. The instrument must be calibrated according to 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 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 samples must be tested on the test bench without heat conduction. For products used outdoors, if there are additional test requirements, they must be stated in the report.  

(4) test voltage  

According to IEC 62301, the fluctuation range of 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 name plate is wide voltage, the test voltage is 115V / 60Hz and 230V / 50Hz. If the input voltage is single voltage input, the test voltage is one of the close to the above two test voltages.  

(5) result judgment