This chapter of the scope GB/T 19212.1-2016 is replaced by the following content:; This part of GB/T19212 specifies the safety requirements for switch mode power supply devices and transformers used in switch mode power supply devices. Transformers with electronic circuits are also included in this section. Note 1:; Safety requirements include electrical, temperature, and mechanical aspects. This section applies to: a) built-in safety isolation transformers, providing AC or DC SELV.PELV or FELV output voltage or a combination of them in accordance with GB/T 17045 and GB/T 16895.21, and switch type power supply devices used for household and other consumer products, except for products included in GB 8898, IEC 61347 series JIEC 61204-7 and GB 4943.1; b) Switching power supply devices for household and other consumer products with a maximum output voltage not exceeding 1000V AC or 1414V ripple free DC, except for products included in item a), GB8898, IEC61347 series, 1EC6204-7, and GB4943.1: c) This part can be used for transformers used in switching power supply devices; See Appendix BB). The safety requirements contained in this section are applicable to: general purpose separated SMPS corresponding to GB/T 19212.2-- General purpose isolation SMPS corresponding to GB/T 19212.5; General purpose safety isolation SMPS corresponding to GB/T 19212.7; The general purpose self coupling SMPS corresponding to GB/T 19212.14. The corresponding requirements apply to SMPS specific to other parts of the GB/T 19212 series. In addition, the requirements listed in this section also apply. When the two standards do not meet, the stricter standards are preferred. Note 2: Due to the maximum rated power supply voltage of the internal transformer being 1000V, the maximum rated power supply voltage of the switch type power supply may be lower due to the rectification method. This section includes standing or mobile, single-phase or multiphase, air cooled (self cooled or air cooled), independent or matched switch type power supply devices, with a rated power supply voltage not exceeding 1100V AC, a rated power supply frequency not exceeding 500Hz, a rated internal working frequency exceeding 500Hz but not exceeding 100MHz, and a rated output not exceeding 1kVA or 1kW. Dry type transformers with encapsulated or non encapsulated windings are installed. The rated output of the supporting transformer for the switch type power supply device included in Appendix BB of this section shall not exceed: -25 kVA for single-phase transformers; For multiphase transformers, it is 40 kVA. Note 3: Additional requirements are required for higher frequencies, but this section can be used as a guide. The no-load output voltage or rated output voltage of the switch type power supply shall not exceed: when using a separate transformer or autotransformer, it is AC 1000 V or ripple free DC 1415 V; When using an isolation transformer, it should be AC 500 V or ripple free DC 708 V; When using a safety isolation transformer, it should be AC 50V or ripple free DC 120V
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