ISO 8820-1:2014 pdf free
ISO 8820-1:2014 pdf free.Road vehicles一Fuse-links一Definitions and general test requirements
The rated current and rated voltage shall be permanently marked to be externally visible on the fuse-link. In addition, the current rating shall be shown by colour coding as specified in the applicable part of ISO 8820.The manufacturer’s name, trademark, and/or symbol shall be marked on the fuse-link insulator.
Stabilize the test fixture and fuse-link at RT prior to testing. Adjust the power supply to the test current specified in the applicable parts of ISO 8820, then apply this current to the fuse-link. Repeat this procedure for each sample.
The operating time of the fuse-link shall be within the limits given in the applicable parts ISO 8820.After the test, the current through the fuse-link shall not exceed the value specified in the appropriate part of ISO 8820 at the rated voltage.
First, apply a current equivalent in value to the rating of the fuse-link on test until it is temperature-stabilized. Sequentially increase the current in steps of 2,5 % of the fuse-link current rating in intervals untilitis temperature-stabilized. The test ends when the fuse-element melts and the current is interrupted.
After the current step test, the current through the fuse-link shall not exceed the value as specified in the appropriate part of ISO 8820 at the rated voltage. The fuse-link shall be removable from the test fixture by its intended method after returning to RT.
After the test, the current through the fuse-link shall not exceed the value as specified in the appropriate part of ISO 8820 at the rated voltage. In addition, particular attention shall be paid to the following:
一there shall be no permanent arcing;
一ruptures to the external surfaces shall not be visible to the naked eye;
一there shall be no welding together of the contacts or terminals;
一the fuse-link shall be removable in one piece from the test fixture by its intended method.ISO 8820-1 pdf free doanload.
