1. Scope of Application
This guiding technical document specifies the general requirements for reliability verification testing of plastic case circuit breakers (hereinafter referred to as plastic case circuit breakers). This guiding technical document specifies the reliability testing methods for molded case circuit breakers that comply with GB 14048,2-2008, AC 50 Hz (60 Hz), rated voltage not exceeding 1000 V, and rated current 250A and below. This guiding technical document is applicable to the verification test plan and test procedure of molded case circuit breakers, as well as to the reliability testing of products. This guiding technical document can serve as a guiding document for manufacturers of molded case circuit breakers to conduct product reliability tests. The reliability test of molded case circuit breakers with a rated current of more than 250 A can be conducted according to this guiding technical document. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 2900.13--2008 Electrotechnical Terminology - Credibility and Service Quality GB/T 2900.18-2008 Electrotechnical Terminology - Low Voltage Electrical Appliances GB/T 5080 (All Parts) Equipment Reliability Testing GB 14048.1-2012 Low Voltage Switchgear and Control Equipment Part 1: General GB 14048.2-2008 Low Voltage Switchgear and Control Equipment Part 2: Circuit Breakers GB/T 17626.2-2006 Electromagnetic Compatibility Testing and Measurement Techniques, Electrostatic Discharge Immunity Testing GB/T 17626,3-2006 Electromagnetic Compatibility, Testing and Measurement Techniques, Radio Frequency Electromagnetic Field Radiation Immunity Testing GB/T 17626.4-2008 Electromagnetic Compatibility, Testing and Measurement Techniques, Electrical Fast Transient Pulse Group Immunity Test GB/T 17626.5-2008 Electromagnetic Compatibility, Testing and Measurement Techniques Surge (Impact> Immunity Test GB/T 17626.6-2008 Electromagnetic Compatibility, Testing and Measurement Techniques, Conducted Disturbance Immunity Induced by RF Fields 3 Terms and Definitions, Symbols 3.1 Terms and Definitions GB/T 2900.13. GB/T 2900.18, GB/T 5080 (All Parts), GB 14048.1, GB 14048.2, and the following terms and definitions apply to this document. 3.1.1 Success rate The probability of a product completing a specified function under specified conditions or successfully testing under specified conditions. 3.1.2 Failure rate The probability of a product's failure occurring per unit time after working to time t
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