IEEE Std 837 pdf free download

IEEE Std 837 pdf free download.Qualifying Permanent Connections Used in Substation Grounding.
3. Definitions
For the purposes of this document, the following terms and definitions apply. The IEEE Standards Djctionari’ Online should be consulted for terms not defined in this clause.4
conductor: A metallic substance that allows a current of electricity to pass continuously along it. As used in this standard, a conductor includes cable (wire). rods (electrodes), and metallic structures.
conductor combination: The various conductors that are joined by a connection.
connection: A metallic device of suitable electrical conductance and mechanical strength used to join conductors.
connection thermal capacity: The ability of a connection to withstand the amount of current required to produce a specified temperature on the control conductor without increasing the resistance of the connection beyond that specified in this standard.
control conductor: The conductor that is utilized to measure equivalent changes in temperature. size. etc.. that are occurring in at least one of the conductors joined by the connection under test.
current loop cycle: The combination of conductors and connections that carries the current of the circuit under test.
equalizer: A device to provide equipotential planes for resistance measurements.
grid system: A system consisting of interconnected hare conductors buried in the earth or in concrete to provide a common ground for electrical devices and metallic structures.
permanent connection: A grounding connection that will retain its electrical and mechanical integrity for the design life of’ the conductor within limits established by this standard.
4. Qualification tests
For qualification test sequence, refer to Annex D. Qualifications tests shall be performed for each family of connections, for example: (cable to cable straight connection, tap connection, cross connection). (cable to ground rod connection). (cable to lug connection), and (cable to structure connection).
Qualification tests shall be performed for each style of connection. For example, crimped lug connections and lugs using bolted pressure plates to secure the cable are considered different styles. Therefore, both connectors are required to be tested to qualify the styles. Other examples of different connector design styles include cable to cable and cable-cross design styles. Within a family of connectors. more robust connectors need not be tested. For example. bolted pressure plate lugs using four (4) bolts need not be tested if two (2) bolts lugs have been tested successfully for the same size. Similarly, for a family of connectors tested for 40 AWG Copper or 19’#8 Copper (‘lad Steel (at 900o of fusing test current for the E•W test) smaller sizes may be qualified by passing only the initial resistance tests from 5.3.2.1. For these smaller sizes, no other tests are required. However, connections for larger conductors specified in footnote b of Table 3 shall be tested for each size connection.5.3.2 Resistance criteria The resistance of the connection, calculated per 5.3.2.1 and tested in accordance with Clause 8, Clause 9, 10.1, 10.2, and Clause 11 for the salt spray sequence, and Clause 8, Clause 9, 10.1, 10.3, and Clause 11 for the acid sequence, shall not be greater than the specified values when compared to the initial resistance value. Resistance measurements shall be taken in accordance with 5.3.2.3. The resistance values shall be corrected to 20 °C.
IEEE Std 837  pdf download.