IEEE 693-2005 pdf free.IEEE Recommended Practice for Seismic Design of Substations.
This recommended practice provides minimum requirements for the seismic design of substations, excluding Class I E equipment for nuclear power generation stations. Seismic qualification of electrical equipment and its support is emphasized.
1.2 Scope
The recommended practice contains recommendations for the seismic design of substation buildings, structures, and equipment.
1.3 Purpose
This recommended practice is for new substations and planned additions or improvements to existing substations. It is not intended that existing substations must be retrofitted to these recommended practices.
For instruction on how to include this recommended practice in specifications, refer to 5.2.
IEEE Std 693 is designed as an integrated set of requirements for the seismic qualification of electrical power equipment. Users should use IEEE Std 693 as a whole. Do not modify or remove any requirement, except as allowed herein.
If any part of this recommended practice is removed, not met, or reduced, then neither the user nor the manufacturer may claim the equipment is in compliance with IEEE Std 693 and should not attach the seismic identification plate to the equipment. The user is strongly urged not to modify any of the requirements herein, including increasing or adding to the requirements.
The most important goal of this recommended practice is to provide a single standard set of design recommendations for seismic qualification of each equipment type. Design recommendations consist of seismic criteria, qualification methods and levels, structural capacities, performance requirements for equipment operation, installation methods, and documentation. The intent of a uniform and consistent seismic qualification procedure is to reduce the cost for qualification of substation equipment, because the manufacturers can qualify their equipment once for each qualification level and eliminate specialized testing. It should also improve earthquake performance by establishing clear performance criteria that take into account the dynamic characteristics of substation equipment.
Three qualification levels are defined. They are low, moderate, and high. The user should determine the desired qualification level when purchasing the equipment. See Clause 8.
This recommended practice is divided into 8 (‘lauses (Clause I through Clause 8) and 22 Annexes (Annex A through Annex V). Clauses contain general seismic design requirements. Annex C through Annex P contain equipment-specific seismic design requirements and are located after the clauses. If the type of equipment to be qualified is not specifically addressed in Annex C through Annex P, the seismic design requirements of Annex B may be used, if applicable.
Annexes are titled normative or informative. Normative annexes are official parts of this recommended practice. Informative annexes include information only and are not an official part of this recommended practice.
The following references are recommended for seismic design of substation structures, foundations, and anchorage:
Buildings: International Building Code (113C), Mexican Code (MDOC/CFE), Uniform Building Code (UBC), or National Building Code of Canada (NBCC).
— Anchorage design: American Society of Civil Engineers (ASCE) Substation Structure Design Guide.
NOTE —Anchorage design requirements are found in the ASCE Substation Structure Design (Iuide. Anchorage requirements for equipment qualification are provided in this recommended practice.
— Foundation Design: International Building Code (IBC). Uniform Building Code (UBC), Mexican Code MDOC/CFE, NBCC, or Canadian Foundation Engineering Manual [B6].
— Structures: Strain Bus Structures, A-Frames, racks, box structures, rigid bus supports, and all other such substation structures. ASCE Substation Structure Design Guide.IEEE 693 pdf download.