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GB/T 31465.1-2015: Road vehicles -- Fuse-link -- Part 1: Definitions and general test requirements Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 31465.1-2015: Road vehicles -- Fuse-link -- Part 1: Definitions and general test requirements---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/GBT31465.1-2015NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.040.10 T 36 Road Vehicles - Fuse-link - Part 1: Definitions and General Test Requirements (ISO 8820-1:2008, MOD) ISSUED ON: MAY 15, 2015 IMPLEMENTED ON: DECEMBER 1, 2015 Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People’s Republic of China. Table of ContentsForeword ... 3 1 Scope ... 5 2 Normative References ... 5 3 Terms and Definitions ... 6 4 Markings, Labels and Color Codes ... 7 5 Tests and Requirements ... 7 6 Dimensions ... 15ForewordGB/T 31465 Road Vehicles - Fuse-links includes the following 7 parts: ---Part 1: Definitions and General Test Requirements; ---Part 2: Users Guide; ---Part 3: Fuse-link with Blade Type; ---Part 4: Fuse-links with Female Contacts and Bolt-in Contacts; ---Part 5: Fuse-links with Axial Terminals (strip fuse-links); ---Part 6: Fuse-links with Bolt-in Contacts with High Voltage; ---Part 7: Fuse-links with Shortened Tabs. This is the first part of GB/T 31465. This Part was drafted in accordance with the rules in GB/T 1.1-2009. The amendment of this Part adopts the Redrafting Law; the formulation of this Part adopts ISO 8820-1: 2008 Road Vehicles - Fuse-links - Part 1: Definitions and General Test Requirements. In comparison with ISO 8820-1: 2008, the technical differences and the causes for these differences are as follows: ---In terms of Chapter 2, this Part has made some adjustments with technical differences: international standards that have been transformed into or that are being transformed into Chinese standards are modified into Chinese standards. Please refer to Chapter 2; ---In 5.3.3 in the previous context, Figure 1 is not mentioned. Figure 1 is added to this Part. ---In 5.4.3.1.1 in the previous context, t and Figure 2 do not match. In this Part, t is modified into T; ---In order to maintain consistency in context description in the standard, “after test, fuse-link shall receive rated operating time test in accordance with 5.5” in 5.4.3.2.1 is transferred to the requirements in 5.4.3.2.2; ---In order to make it convenient for operation, the requirement of test time error is added to 5.1.1. Road Vehicles - Fuse-link - Part 1: Definitions and General Test Requirements1 ScopeThis Part specifies the terms and general test requirements of fuse link. This Part is applicable to fuse link for road vehicles. This Part is not applicable to accessory sheathing products for vehicle fuse links.2 Normative ReferencesThe following documents are indispensable to the application of this document. In terms of references with a specific date, only versions with a specific date are applicable to this document. In terms of references without a specific date, the latest versions (including all the modification lists) are applicable to this document. GB/T 2423.53 Environmental Testing for Electric and Electronic Products - Part 2: Test Methods - Test Xb: Abrasion of Markings and Letterings Caused by Rubbing of Fingers and Hands (GB/T 2423.53-2005, IEC 60068-2-70: 1995, IDT) GB/T 25085 Road Vehicles - 60 V and 600 V Single-core Cables (GB/T 25085-2010, ISO 6722: 2006, IDT) GB/T 28046.3 Road Vehicles - Environmental Conditions and Testing for Electrical and Electronic Equipment - Part 3: Mechanical Loads (GB/T 28046.3-2011, ISO 16750-3: 2007, MOD) GB/T 28046.5 Road Vehicles - Environmental Conditions and Testing for Electrical and Electronic Equipment - Part 5: Chemical Loads (GB/T 28046.5-2013, ISO 16750-5: 2010, MOD) GB/T 31465.2-2015 Road Vehicles - Fuse-link - Part 2: Users Guide GB/T 31465.3-2015 Road Vehicles - Fuse-link - Part 3: Fuse-link with Blade Type GB/T 31465.4-2015 Road Vehicles - Fuse-link - Part 4: Fuse-links with Female Contacts and Bolt-in Contacts GB/T 31465.5-2015 Road Vehicles - Fuse-link - Part 5: Fuse-links with Axial Terminals NOTE: continuous operating current is lower than the rated current. 3.3 Rated Voltage UR Rated voltage refers to the maximum supply voltage that is applicable to fuse-links. 3.4 Voltage Drop Ud Voltage drop refers to the voltage value which is measured under the stipulated current and at the appointed measuring points. 3.5 Breaking Capacity IB Breaking capacity refers to the current value that fuse-link can normally fuse under stipulated conditions and rated voltage. 3.6 Time Constant Time constant refers to the time that a physical quantity takes to rise from 0 to 1-1/e (for example, 63.2%), and ultimately reach a stable state. Under the stable state, the numerical value is not time t, but 1-e-kt. 3.7 Operating Time Operating time refers to the time, starting from imposing overcurrent, till the current drops to below the appointed value.4 Markings, Labels and Color CodesOn the surface of fuse-links, rated current and voltage shall be clearly and permanently marked. The rated current shall also be represented in the color codes stipulated in other parts of this series of standards. On fuse-link’s insulator, the manufacturer’s name, trademark and code shall be marked.5 Tests and Requirements5.1 Overview 5.1.1 General test conditions If there are no other stipulations, all tests shall be conducted under room temperature If mechanical load test is requested, the demand-side and the supply-side shall negotiate and select test items of GB/T 28046.3. 5.4.2.2 Requirements After the mechanical load test, fuse-link shall comply with the stipulated rated operating time provided in corresponding parts in this series of standards. 5.4.3 Climate load 5.4.3.1 Temperature/humidity cycle 5.4.3.1.1 Test Fuse-link shall receive the temperature/humidity cycle test stipulated in Figure 2. The test steps are as follows: a) Maintain sample under standard environmental conditions for 4 h. b) Within 0.5 h, under the relative humidity of 95% ~ 99%, raise T to (55 ± 2) °C. c) At (55 ± 2) °C and the relative humidity of 95% ~ 99%, maintain for 10 h. d) Within 2.5 h, decrease T to (-40 ± 2) °C (do not control humidity). e) At (-40 ± 2) °C, maintain for 2 h (do not control humidity). f) Within 1.5 h, raise T from (-40 ± 2) °C to (120 ± 2) °C (do not control humidity). g) At (120 ± 2) °C, maintain for 2 h (do not control humidity). h) It is allowed to return to room temperature (do not control humidity) within 1.5 h. 24 h shall be considered as a cycle. After a cycle finishes, the test may be interrupted. During the interruption, test samples shall be preserved under the standard environmental conditions. The condition of the interruption shall be recorded in test report. 5.4.3.1.2 Requirements After at least 10 cycles, the fuse-link shall comply with the requirement of rated operating time provided in corresponding parts of this series of standards and shall be intact. link, use 5 N of force to wipe it for 5 times. Please refer to GB/T 2423.53. 5.4.4.3 Requirements After the test, the marking of the fuse-link shall be distinct and durable. Color code shall be easily recognizable. 5.5 Rated Operating Time 5.5.1 Objective The objective is to examine fuse-link’s operating characteristics when the circuit is overloaded. 5.5.2 Test Before the test, under room temperature conditions, properly install the test fixture and the fuse-link. Then, adjust the power, so that the current would reach the stipulated test current in corresponding parts in this series of standards. Conduct power-on test on the fuse-link. Repeat this process on each sample. 5.5.3 Requirements Fuse-link’s operating time shall be within the stipulated limit value in corresponding parts in this series of standards. After the test, the current that passes through the fuse- link shall not exceed the current value under the stipulated rated voltage in corresponding parts in this series of standards. 5.6 Current Gradient 5.6.1 Objective The objective is to evaluate fuse-link’s resistance to long-term heat emission under low overload conditions. 5.6.2 Test Firstly, provide the fuse-link’s rated current, till the temperature becomes stable. Then, at the gradient of 2.5% rated value, raise the current, till the temperature becomes stable. When fuse-element fuses and the current is interrupted, end the test. 5.6.3 Requirements Through the current gradient test, under the stipulated rated voltage in corresponding parts in this series of standards, the current that passes through the fuse-link sample shall not exceed the stipulated value. At room temperature, through methods that comply with the design intentions, the test sample shall be able to be removed from the test fixture. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. |
