Power Plant Construction and QA/QC

Sections 4.6 & 4.7 – Busway and Cable Applications

Engineering Technology Engineering Technology DivisionDivision

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Sections 4.6 & 4.7 – Busway and Cable Applications

Overview

• Bus bars – Cu or Al – bolted connections

• Bus Connections – losses

• Bus Size dependent on voltage

• Bus Placement – distance between phases – arcing

• Bus Work – typically enclosed and grounded

• Cable – Cu or Al

• Cable insulation – voltage dependent

• Cable Terminations – bolted lug – pressure, mechanical or solder

• Cable Trays – Routing

• EMI – Power vs. Instrumentation

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Sections 4.6 & 4.7 – Busway and Cable Applications

Buswork and Duct

Losses – HeatNumber of bars – VoltageDistance - Arcing

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Sections 4.6 & 4.7 – Busway and Cable Applications

Buswork Losses – Thermal Imaging

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Sections 4.6 & 4.7 – Busway and Cable Applications

Electrical Cable - Construction

Inconel Jacket

Twisted Wire

Solid Wire

Shielded Cable

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Sections 4.6 & 4.7 – Busway and Cable Applications

Electrical Cable - Insulation

• Asbestos• Thermoplastic/Setting

Compounds• Paper-Laminated• Varnished Cloth• Mineral Insulation

Asbestos

Thermosetting Compounds

Varnished Paper & Cloth

Mineral Insulated

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Sections 4.6 & 4.7 – Busway and Cable Applications

Electrical Cable Trays

Power vs. Instrumentation

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Sections 4.6 & 4.7 – Busway and Cable Applications

Electrical Cable Conduit

Steel PipeFlexible Steel StripPVC Tubing

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Questions?

Sections 4.6 & 4.7 – Busway and Cable Applications