IEEE Std 1071:2019 pdf free download – IEEE Application Guide for an Engineered Restoration Program forFailed Transmission Structures
3.1 Introduction
To perform the safe installation of the engineered transmission restoration structure the installer should haveknowledge of the particular structure design and the intended use, as well as the manufacturer ‘s recommendedprocedures. The installer should be aware of the different structure components, strength requirements, guyingrequirement, anchoring requirements, as well as any limitation of the components that may be used for theparticular installation.Utilities and/or asset owners may identify an engineered transmission restorationstructure(ETRS) design that could facilitate the restoration of numerous structure designs. One examplecould be the use of single pole steel to use on a particular single-pole wood line and the same poles couldalso be used to restore a downed H-frame two-pole structure.An ETRS can have many different structuredesigns depending on the need of the owner utility. The engineered restoration structure (ERS) design hasmany components that are stacked and bolted together to meet the specific needs; the installer should be awareof the intended use of the structure prior to installation.The design engineer and the installer should determineall loads to be applied to the structure in order to help ensure the structure can hold these loads.
4.2 Structure drawings
Prior to any actual emergency, the utilities should evaluate the transmission system to determine lines thatmight require an ETRS program. The utility should consider previous failure scenarios and other uniquescenarios that could jeopardize the system. A thorough understanding of design requirements for the specificscenarios identified should be documented in an emergency response plan with engineering drawings for theETRS that could be used to restore the line.Acceptable wind and weight spans for a given structure height andconductor can be shown on the drawings.
In addition, drawings of pre-designed, standardized insulator and hardware assemblies for each voltage levelwill reduce confusion and improve response to an actual emergency.
5. Training
5.1 Field training
One key to a successful restoration program is to help ensure everyone involved understands the work to beperformed.A formal and periodic training program that allows hands-on experience fortrainees on the differentcomponents of theETRS, as well as how to erect the structure, will help ensure that when the need to use thestructure does arise that the confusion is at a minimum. The training should involve the structure diagramsand the anchoring diagrams. The company safety procedure as they relate to the structure installation shouldbe followed during the training procedure.Recommendations and procedures provided by the restorationstructure supplier should be followed provided they are consistent with installer ‘s safety 29 procedures. Thetraining program should also discuss the handling, hauling,and storage procedures for the restoration structureto help prevent damage to the structure(s).
Videos of the training should be taken to help in classroom refresher courses prior to the next training.
Following each training exercise, the installer ‘s ficld crews should re-evaluate restoration plans through apost-event evaluation, in order to make adjustments and or improvements.