Module Twelve - Mechanical Construction Methods and Materials - NCCER Substation Slides

100001797016261 32 views 62 slides May 02, 2024

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About This Presentation

Module Twelve - Mechanical Construction Methods and Materials - NCCER Substation Slides

Size: 15.83 MB

Language: en

Added: May 02, 2024

Slides: 62 pages

Slide Content

Mechanical Construction Methods and Materials Module Twelve – 82205-12

Objectives Upon completion of this module, you will be able to do the following: Identify the types and materials of steel structures. Identify types of fasteners and torque methods and values. Identify types of bus and connectors. Identify the types of bus supports.

Performance Tasks Under the supervision of the instructor, you should be able to do the following : Properly torque fasteners.

Figure 1 — Transmission substation by Oconee Nuclear Generating Station

Figure 2 — Subtransmission and distribution substations

Figure 3 — Construction work high above ground

Figure 4 — Caution and danger signs

Figure 5 — Substation structures

Figure 6 — Detail B of connection with stiffener plates

Figure 7 — Section from erection drawing

Figure 8 — Typical distribution substation support structure

Figure 9 — Steel lattice structure

Figure 10 — Box truss supports

Figure 11 — A-frame dead-end structure

Figure 12 — H-shaped dead-end structure

Figure 13 — Polygonal A-frame structure

Figure 14 — A-frame of angle iron and lattice construction

Figure 15 — Lightning mast tip

Figure 16 — Polygonal lightning mast

Figure 17 — Insulators

Figure 18 — Support insulators

Figure 19 — Suspension insulator

Figure 20 — Suspension insulator bells

Figure 21 — Lightning arresters

Figure 22 — 115kV ground switch

Figure 23 — One phase of a gang-operated transmission line switch

Figure 24 — Circuit breakers

Figure 25 — Threaded fasteners

Figure 26 — Screw thread designations

Figure 27 — Thread types

Figure 28 — Grade markings for steel bolts and screws

Figure 29 — Bolt markings for A325 bolts

Figure 30 — A325 hex nuts

Figure 31 — Type 3 washers

Figure 32 — Proper tightening sequence

Figure 33 — Safety-wired fasteners

Table 1 — Bolt Chart Information

Figure 34 — Torque value charts

Figure 35 — Beam-type torque wrench

Figure 36 — Click-type torque wrench

Figure 37 — Digital torque wrench

Figure 38 — Torque multiplier

Figure 39 — Installation of tension control bolts

Feature — Intelligent Bolts

Figure 40 — Bolt load indicator installation methods

Table 2 — Gap Measurement

Figure 41 — Amount of gap before and after turning

Figure 42 — Belleville washer

Figure 43 — Fastener elastic and plastic ranges

Figure 44 — Torque angle gauge

Figure 45 — Torque angle gauge in use

Figure 46 — Rigid busbar

Figure 47 — Tubular aluminum busbar

Figure 48 — SF 6 bus

Figure 49 — Aluminum strain bus conductor

Figure 50 — Tubular bus compression fittings

Figure 51 — Bolted terminal connections

Figure 52 — Dead-end clamp

Figure 53 — Aluminum compression connection

Figure 54 — Welding busbar fittings

Supplemental Art

Course Map

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