ISO 8820-5-2015 pdf free.Road vehicles – Fuse-links – Part 5: Fuse-links with axial terminals (Strip fuse-links) Types SF 30 and SF 51 and test fixtures.
This part of ISO 8820 specifies fuse-links with axial terminals (Strip fuse-links) Type SF 30 and SF 51 and test fixtures for fuses in road vehicles. It establishes, for these fuse-link types, the rated current, test procedures, performance requirements. and dimensions.
This part of ISO 8820 is applicable to fuse-links with a rated voltage of 32 V, a current rating of 30 A to
500 A, and a breaking capacity of 2 000 A intended for use in the electrical system of road vehicles with
a nominal voltage of 12 V and/or 24 V.
This part of ISO 8820 is intended to be used in conjunction with ISO 8820-1 and with ISO 8820-2. The numbering of its Clauses corresponds to that of ISO 8820-1, whose requirements are applicable except where modified by requirements particular to this part of ISO 8820.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4017, Fasteners — Hexagon head screws — Product gradesA and B
ISO 4032, Hexagon regular nuts (style 1) — Product grades A and B
ISO 7089, Plain washers — Normal series — Product grade A
ISO 8820-1, Road vehicles — Fuse-links — Part 1: Definitions and general test requirements
ISO 8820-2, Road vehicles — Fuse-links — Part 2: User guidelines
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8820-1 apply.
4 Marking, labelling, and colour coding
The requirements given in Table 1 and ISO 8820-1 shall apply.
5 Tests and requirements
5.1 General
5.1.1 General test conditions
In addition to carrying out the test procedures in accordance with Iso 8820-1, the following criteria shall apply:
— tests shall he performed following the test sequences in Table 2:
— the test fixtures for electrical tests shall be designed in accordance with Figure 4 to Figure 7. The connection resistance shall be a maximum of 1,0 mci for SF 30 fuse-links and a maximum of 0,35 mci for SF 51 fuse-links to ensure the proper function of the test fixture;
— terminals shall have a suitable finish which will ensure corrosion protection and shall have satisfactory mechanical and electrical properties.
Fuse-link type SF 30 with a rated current of 150 A…200 A and fuse-link type SF 51 with a rated current of 300 A … 500 A shall only be used for short circuit protection and have to be tested with a cable, the insulation of which will withstand the test without deterioration.ISO 8820-5 pdf free download.
Tags: Road vehicles
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