IEEE Std C37.48.1 pdf free download

IEEE Std C37.48.1 pdf free download.Application, Operation, and Coordination of High- Voltage (>1000 V) Current-Limiting Fuses.
1.2 Purpose
The purpose of this guide is to expand on aspects of the general fuse application guide. IEEE Std C37.48, in areas associated with the application and coordination of high-voltage (>1000 V) current-limiting fuses. This guide is more “tutorial” in nature than IEEE Std C37.48. and includes descriptions as to how different types of fuses work. It was developed to create a better understanding of how most fuse types operate, but with an emphasis on current-limiting fuses after the category “full-range” was added to the existing categories oflbackup and “general-purpose” current-limiting fuses.
1.3 Background
In order to fully understand the behavior of current-limiting fuses and the application relationship between them and other types of fuses which do not significantly limit the first peak of current (hereafter referred to as expulsion and other types of non-current-limiting fuses), a number of references to these “other” types of fuses will be made. It is not the intent of the authors of this guide to claim that any type of fuse is inherently “better” or “worse” than any other. The intent is to present design and operating characteristics of, as well as application guidelines for, current-limiting fuses. However, since such fuses are used on the same system as, and are coordinated with, expulsion and other types of non-current-limiting fuses, some discussion of their design and operating characteristics is also appropriate.
In all cases, it is of particular importance to follow the specific application guidelines published by the manufacturer of any particular device to be used. The manufacturer’s guidelines should always take precedence over the opinions expressed in this guide, which are, of necessity, something of a generalization.
Some of the current-limiting type fuses listed in 1.1 are similar to those now covered in IEC 60282-1. However, differences exist in the testing requirements of IEC, IEEE, and ANSI. IEEE fuse standards primarily reflect applications common in North America and in countries that use electrical systems designed using similar principles. IEC standards tend to rely heavily on practices common in Europe. Since IEC testing differences include testing at different voltages for the same fuse rated voltage, and different or no testing for fuses intended for use in a surrounding temperature above 40 °C, the user is advised to exercise caution if devices specified and tested per EEC standards arc compared with those specified and tested per IEEE and ANSI standards. The differences in test requirements may result in devices tested to EEC not being suitable for applications where devices tested to IEEE and ANSI standards are required, or vice versa.
In the headings and the text of this document, there are some areas where information is included in brackets [ ]. The information in the brackets is a term used in IEC standards that may be similar to the term used in this document, a term that is common in some parts of the world, or a term that has been used previously in IEEE or ANSI standards. Caution is again advised when making comparisons.IEEE Std C37.48.1 pdf download.