IEEE C37.41-2008 pdf download IEEE Standard Design Tests for High-Voltage (>1000 V) Fuses, Fuse and Disconnecting Cutouts, Distribution Enclosed Single-Pole Air Switches, Fuse Disconnecting Switches, and Fuse Links and Accessories Used with These Devices
1.2 Purpose
This standard specifies the minimum testing requirements for fuses and related devices. Suchstandardization is needed to ensure uniform minimum product testing for devices within the documentscope. Test areas covered are based on historical experience.
1.3 Background
The distribution and power class expulsion type fuses listed in 1.1 are similar to those now covered inIEC 60282-2. The distribution class expulsion type fuses are similar to the class “A” fuses covered in thedocument, and the power class fuses are similar to their class “B fuses. Some of the current-limiting typefuses listed in l.l are similar to those now covered in IEC 60282-1. However, significant differences existin the testing requirements of IEC and IEEE/ANSI. IEEE fuse standards primarily reflect applicationscommon in North America and in countries that use electrical systems designed using similar principlesIEC standards tend to rely heavily on practices common in Europe. Since lEC testing differences includetesting at different voltages for the same fuse rated voltage, and diferent or no testing for fuses intended foruse in a surrounding temperature above 40 °C. the user is advised to exercise extreme caution if devicesspecified and tested per IEC standards are compared with those specified and tested per lEEE/ANSlstandards. The differences in test requirements may result in devices tested to IEC not being suitable forapplications where devices tested to IEEE/ANSI standards are required, or vice versa.
In the headings and the text of this document, there are some areas where information is included inbrackets ( ]. The information in the brackets is a term used in IEC standards that may be similar to the termused in this document a term that is common in some parts of the world, or a term that has been usedpreviously in IEEE or ANSI standards. Caution is again advised when making comparisons.
1.4 Description of fuse-enclosure packages (FEPs) using expulsion type indoorpower class fuses
Type IE: A fuse mounted in an enclosure with relatively free air circulation within the enclosure(e.g., an expulsion fuse mounted in an enclosure or vault).
Type 2E: A fuse mounted in a container with restricted air flow surrounding the fuse, but withrelatively free air circulation within the enclosure on the outside of the container (e.g., anexpulsion fuse in an enclosure with insulating barriers that form a container that restricts the airflow).
Type 3E: A fuse directly immersed in liquid and mounted in an enclosure with relatively freeiquid circulating around the fuse (e.g., an expulsion fuse in a liquid-filled switchgearenclosure).
IEEE C37.41-2008 pdf download
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