GB 20943-2013 Minimum allowable values of energy efficiency and evaluating values of energy conservation for single voltage external AC-DC and AC-AC power supplies
This standard specifies the minimum allowable values of energy efficiency, evaluating values of energy conservation, test method and inspection rules for external power supply (hereinafter referred to as product) which converts the AC voltage to fixed single low pressure DC (not greater than 36V) or low pressure AC (not greater than 36V) output voltage under the conditions of 220V and 50Hz power supply.
This standard is applicable to the product with rated output power not larger than 250W.
This standard is not applicable to DC-DC power supply and products for special purpose such as powering industrial equipment, medical device and etc.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative documents (including any amendments) applies.
GB 4706.18-2005 Safety of Household and Similar Electrical Appliances - Particular Requirements for Battery Chargers
3 Terminologies and Definitions
For the purpose of this standard, the following terminologies and definitions apply.
3.1
Single voltage external AC-DC power supply
Products provided with the following characteristics:
a) Convert AC network voltage to DC low voltage;
b) Only provide one fixed DC output voltage each time;
c) Used with electricity load;
