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GB 24849-2017: Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Household and Similar Microwave Ovens Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB 24849: Historical versions
Similar standardsGB 24849-2017: Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Household and Similar Microwave Ovens---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB24849-2017 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.010 F 01 Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Household and Similar Microwave Ovens Issued on. MAY 31, 2017 Implemented on. JUNE 1, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of the People's Republic of China. Table of ContentsForeword... 3 1 Application Scope... 5 2 Normative References... 5 3 Terms and Definitions... 5 4 Energy Efficiency Grades... 7 5 Technical Requirements... 8 6 Test Methods... 8 7 Inspection Rules... 8 Annex A (Normative) Test Method for Efficiency for Microwave Ovens... 9 Annex B (Normative) Test Method for Energy Consumption for Grill-function 12 Annex C (Normative) Test Method for Off-mode and Standby-mode Power of Microwave Ovens... 15ForewordThis Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB 24849-2010, Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Household and Similar Microwave Ovens. Compared with GB 24849-2010, the major changes are as follows, in addition to editorial changes. -- the definition of efficiency for microwave ovens is added (see 3.1); -- the off mode (see 3.4; 3.5 of edition 2010) and standby mode (see 3.5; 3.4 of edition 2010) are redefined; -- the basic requirements are deleted (4.1 of edition 2010); -- the definition of and requirements for “evaluating values of energy conservation” are deleted (3.2 and 4.7 of edition 2010); -- the calculation formula of microwave ovens is moved to the text part (Article 4; A.2.2 of edition 2010); -- the energy efficiency grades are adjusted from 5 energy efficiency grades in the original standard to 3 energy efficiency grades (see 4.1; 4.2 of edition 2010); -- the expression of heating time t in the calculation formula of efficiency for microwave ovens (see 4.2) and the determination method for heating time (see A.2.1) are explained; -- the method for the determination of the geometrical centre of the chamber of microwave ovens is added (see B.3); -- the test methods for the off-mode power and standby-mode power are modified (see Annex C; Annex C of edition 2010). This Standard was proposed by the National Development and Reform Commission Resource Saving and Environmental Protection Department and the Ministry of Industry and Information Technology Energy Saving and Comprehensive Utilization Department. This Standard shall be under the jurisdiction of the National Standardization Technical Committee on Energy Base and Management (SAC/TC 20). The drafting organizations of this Standard. China National Institute of Standardization, Guangdong Midea Kitchen Appliances Manufacturing Co., Ltd., China Household Electric Appliance Research Institute, China Standard Certification (Beijing) Co., Ltd., Ningbo Fotile Kitchen Ware Co., Ltd., Hangzhou Robam Electrical Appliances Co., Ltd., Guangdong Glanz Group Co., Ltd., Panasonic Appliances Microwave Oven (Shanghai) Co., Ltd., Whirlpool (China) Co., Ltd., Vkan Certification and Testing Co., Ltd., China Quality Certification Centre South China Laboratory, Shanghai Institute of Quality Inspection and Technical Research. The main drafters of this Standard. Liu Wei, Luan Chun, Ye Jilin, Li Xufei, Cai Zhijun, Wang Geng, Bi Chongqiang, Wang Pan, Shao Guangda, Cheng Jianhong, Wu Nengwang, Peng Yanyan, He Tingting, Fu Yuanhua, Ruan Huaping, Ouyang Ruolin, Shen Yajun, Zhang Lei, Du Xin, Huang Zhicheng, Jin Danmei. The previous edition of the standard replaced by this Standard is as follows. -- GB 24849-2010. Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Household and Similar Microwave Ovens1 Application ScopeThis Standard specifies the minimum allowable values of energy efficiency, efficiency grades, test methods and inspection rules for household and similar microwave ovens (hereinafter referred to as microwave ovens). This Standard applies to microwave ovens of maximum rated input power 2 500 W and below, including combination microwave ovens, which heat materials and foods in the chamber with the electromagnetic energy of ISM frequency band, 2450 MHz, and resistive electrical heating elements. This Standard does not apply to commercial microwave ovens, industrial microwave ovens and microwave ovens with range hoods. NOTE ISM frequency band is the electromagnetic frequency range which was decided by the International Telecommunications Union (ITU) and adopted in the standard numbered CISPR 11.The standard was developed by the International Special Committee on Radio Interference (CISPR).2 Normative ReferencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced documents (including all amendments) applies to this Standard. GB 4706.21, Household and Similar Electrical Appliances – Safety – Particular Requirements for Microwave Ovens Including Combination Microwave Ovens GB/T 18800, Household Microwave Oven – Methods for Measuring Performance3 Terms and DefinitionsFor the purposes of this document, the following terms and definitions and those defined in GB 4706.21, GB/T 18800 and IEC 62301 apply. 3.1 efficiency for microwave ovens The ratio of the effective output energy to the input energy of microwave ovens, expressed in %. 3.2 minimum allowable values of energy efficiency for microwave ovens The minimum allowable values of energy efficiency of microwave ovens under the testing conditions specified in this Standard, provided that the standby power, off power and maximum allowable values of energy consumption for grill-function are met. 3.3 maximum allowable values of energy consumption for grill-function The maximum allowable values of energy consumption for the grill function of microwave ovens under the testing conditions specified in this Standard, in W·h. 3.4 off mode The mode in which microwave ovens are connected to power supply but do not provide any standby or main functions. The indicator lamps only used to indicate microwave ovens are also in the off mode.4 Energy Efficiency Grades4.1 Energy efficiency grades of microwave ovens The energy efficiency grades of microwave ovens include 3 grades (see Table 1); grade 1 provides the maximum energy efficiency. 4.2 Calculation method for efficiency of microwave ovens The efficiency of microwave ovens is calculated in accordance with Formula (1).5 Technical RequirementsThe minimum allowable values of energy efficiency for microwave ovens are of energy efficiency grade 3 specified in Table 1.6 Test MethodsThe test conditions and methods for the determination of the efficiency values of microwave ovens are as specified in Annex A.7 Inspection RulesThe samples for the type inspection of efficiency are 3 sets for each batch, including 2 sets for test and 1 set as standby.Annex A(Normative) Test Method for Efficiency for Microwave Ovens A.1 Test conditions A.1.1 Test environment The test shall be conducted in a site. there is no forced-convection air; the environmental temperature is 20°C ± 5°C; the relative humidity is 45% ~ 75%. A.1.2 Test power supply The microwave ovens to be tested are powered at the voltage 220 × (1 ± 1%) V and the frequency 50 × (1 ± 1%) Hz; the total harmonic distortion shall not be greater than 5%. A.1.3 Measuring apparatus When water temperature is measured, the accuracy of the temperature measuring system used shall be ± 0.5°C within the temperature range of 0°C ~ 50°C. A.1.4 Arrangement of microwave ovens to be tested The microwave ovens to be tested shall be placed on a horizontal platform of plywood, which is about 20 mm in thickness and coated with matt black paint. A.2 Test method A.2.1 Microwave output power During the measurement, pour water into a glass container as the load with the initial water temperature lower than the environmental temperature; use the microwave ovens to heat to approximately the environmental temperature. The step shall ensure the minimum effects on the heat loss and heat capacity of the container. Therefore, consideration shall be given to correction factor. In a word, the step requires accurate measurement of water temperature. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB 24849-2017 be delivered?Answer: The full copy PDF of English version of GB 24849-2017 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB 24849-2017_English with my colleagues?Answer: Yes. The purchased PDF of GB 24849-2017_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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