The provisions of the general provisions of IEC 60947-1 are applicable to the specific requirements in this part. Therefore, when using the clauses and sub clauses, tables, diagrams, and appendices in the general rules, they can be represented by referring to 1EC 60947-1, for example, referring to 4.3.4.1 in IEC 60947-1, Table 4 in IEC 60947-1, or Appendix A.1.1 in 1EC 60947-1. Scope and purpose of application. This part of GB/T 14048 is applicable to switch, isolator, isolating switch, and fuse combination devices in distribution circuits and motor circuits with a rated voltage of AC not exceeding 10000 V or DC not exceeding 1500 V. The manufacturer shall specify the type, rating, and characteristics of the fuse according to the relevant standards of the combined fuse. This section does not apply to electrical appliances included in the scope of IEC 60947-2, IEC 60947-4-1, and IEC 60947-5-1: However, if switch and fuse combinations within this section are typically used for starting, connecting, and/or stopping a single motor, they should comply with the additional requirements specified in Appendix A. The requirements for single pole operated three pole switches are included in Appendix C. The auxiliary switches used in electrical appliances within the scope of this section should meet the requirements of IEC 60947-5-1. This section does not include additional requirements for explosion-proof electrical appliances. Note 1: A switch (or isolator) can be referred to as a "rotary switch (or rotary isolator)", "cam switch (or cam isolator)" * knife switch (or knife isolator) ", etc. based on its structure. Note 2: The term "switch" in this section can also refer to electrical appliances called "com mutators" in French, which are used to change the connection between several circuits, especially when one part of the circuit is used to replace another part of the electrical appliance. Note 3: This section is commonly referred to as "electrical appliances" for switches, isolators, isolating switches, and fuse combinations . The purpose of this section is to specify: a) the characteristics of electrical appliances. b) The relevant conditions that electrical appliances should meet: 1) operation and performance under normal usage conditions; 2) Operation and performance under specified abnormal conditions (such as short circuit conditions); 3) Dielectric performance. c) tests that demonstrate compliance with these conditions and the methods used for conducting these tests. d) The data that should be indicated on the electrical appliance or provided by the manufacturer (such as in the product catalog). 1.2 Normative References The following documents are essential for the application of this document. For all dated references, only the dated version applies to this document. The latest version (including all modification orders) of any referenced document without H period is applicable to this document. GB/T 2828.1-2012 Sampling Procedures for Inspection by Attributes - Part 1: Sampling Plans for Batch Inspection Retrieved by Acceptance Quality Limit (AQL) (ISO 2859-1:1999, IDT) GB4824-2013 Industrial, Scientific, and Medical (ISM) Radiation Equipment - Limits and Corona Measurement Methods for Electromagnetic Strong Disturbance Characteristics (CISPR11: