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Substation Station bus Design

Substation Station bus Design

Substation Station bus Design

Was wondering is anyone had any sources for determining the short cct capability of an existing substation bus design.  It was originally designed through a consultant who went through another contractor and somehow any pertinent information on the bus design was never submitted (or was lost in the documentation process).  In any case, I know what the sht cct levels will be on the busswork but I what I do not know is how to go about calculating the capability of the existing bus to withstand the forces generated during a short cct condition or what things in particular (like stn post insulators) limit that capability.  The sht cct level will be going up in the next few years by about 30% of what once once assumed the ultimate so I want to ensure that the old desing will be adequate.  Any hints, tips or references would be much appreciated.

RE: Substation Station bus Design

Try the Standard Handbook for Electrical Engineers, by Fink & Beatty, 13th edition - section 17 para 26 for some guidance.  

RE: Substation Station bus Design

Try the OLD " Rural Substation Design Book ", I can e-mail you the location in the WEB.

RE: Substation Station bus Design

Suggestion: The more officical documentation could include industry standards, e.g.
1. NEMA BU-1 Busways
2. NEMA BU-1.1 General Instruction for Proper Handling, Installation, Operation, and Maintenance of Busways Rated 600 Volts or Less
3. UL Std 857 Electric Busways and Associated Fittings
4. ANSI/IEEE C37.20 Switchgear Assemblies Including Metal-Enclosed Bus
5. ANSI/IEEE C37.23 IEEE Standard for Metal-Enclosed Bus and Calculating Losses in Isolated-Phase Bus
6. ANSI/NFPA 70 National Electrical Code

RE: Substation Station bus Design

See the references posted for "Calculate Electric bars" posted 12/2. The ITE publication provides all the information needed to  determine the short circuit bracing for existing bus structures. The publication is excellent.

RE: Substation Station bus Design

Try IEEE 605-1998, Guide for Design of Substation Rigid Bus Structures, or Aluminum Electrical Conductor Handbook Chapter 13 covers Bus Conductor Design.

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