IEEE C37.42-2009 pdf free

IEEE C37.42-2009 pdf free.IEEE Standard Specifications for High-Voltage (> 1000 V) Expulsion-Type Distribution-Class Fuses,Fuse and Disconnecting Cutouts Fuse Disconnecting Switches, and Fuse Links, and Accessories Used with 1 These Devices.
Standard specifications for the devices covered by this document are necessary to ensure consistent development and application of these devices by manufacturers and users of these devices.
1.3 Background
The fuses and fuse cutouts listed in 1.1 are the same as those covered in IEC 6O282-2. The open and enclosed types of “distribution” class t’uses and fuse cutouts are the same as the class “A” fuses and fuse cutouts covered in that document. However, several minor ditkrences exist in the testing requirements of 1EC and IEEFJANSI. IEEE fuse standards reflect, primarily, applications common in North America and in countries that use electrical systems designed using principles similar to those used in North America. IEC standards tend to rely heavily on practices common in Europc. The difkrcnccs in test requirements may result in devices tested to IF.C that do not meet the requirements of the IF.EE.ANSI standards, or vice versa.
in the headings and the text of this document there will be some areas where information is included in brackets [ J. The information in the brackets is a term used in IEC standards that may be similar to the term we are using, a term that is common in some parts of the world, or is a term that has been used previously in ANSI and IEEE standards. Caution is again advised when making comparisons
1.4 Other devices covered by this standard
This standard may also be used for distribution-class devices, which are not of expulsion type or current- limiting type, wherein the circuit current stops flowing at the circuits’ natural current zero, and the environment within the device prevents the restart of current after the current zero. The manufacturer and the user should agree on any specifications or tests performed for these devices.
2. Normative references
The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies.IEEE C37.42 pdf download.