GB/Z 22074-2008 (English Version) PDF

Standard No.: GB/Z 22074-2008
Language: Chinese, Available in English version
Release Date: 2008
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Status: Be replaced 2016-11
Replace By: GB/Z 22074-2016
Latest: GB/Z 22074-2016

Scope: This guiding technical document specifies the general requirements for reliability tests of plastic case circuit breakers (referred to as molded case circuit breakers). This guiding technical document is applicable to molded case circuit breakers conforming to GB 14048.2-2001, AC 50Hz (60Hz), rated voltage not exceeding 1000V, rated current 250A and below. In addition to verification test plans and test procedures, this guiding technical document is also applicable to product reliability testing. This guiding technical document can be used as a guiding document for molded case circuit breaker manufacturers to conduct product reliability tests. The reliability test of the molded case circuit breaker with rated current above 250A can refer to this standard.

GB/Z 22074-2008 Referenced Document

GB 14048.1-2006 Low-voltage switchgear and controlgear. Part 1: General rules
GB 14048.2-2001 Low-voltage switchgear and controlgear Low-voltage circuit breakers
GB/T 2900.18-2008 Electrotechnical terminology.Low voltage apparatus
GB/T 3187-1994 Reliability and maintainability terms
GB/T 5080.1 Reliability testing.Part 1:Test conditions and statistical test principles*， 2012-11-05 Update
GB/T 5080.2 Reliability testing.Part 2:Design of test cycles*， 2012-11-05 Update
GB/T 5080.4 Equipment reliability testing--Procedure for point estimates and confidence intervals from reliability determination tests(Exponential distribution)
GB/T 5080.5 Equipment reliability testing--Compliance test plans for success ratio
GB/T 5080.6 Equipment reliability testing--Tests for the validity of a constant failure rate assumption
GB/T 5080.7 Equipment reliability testing--Compliance test plans for failure rate and mean time between failures assuming constant failure rate