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MEP201 Mechanical Engineering Drawing 1 st semester 2005-06

MEP201 Mechanical Engineering Drawing 1 st semester 2005-06. S R Kale Lecture Wiring Drawings. Wiring - Applications. Power to equipment (grid, back-up) - motors, generators, arc welding, furnace, lathe, A/C, Connecting computers or DAS - Power to computers, instruments, …

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MEP201 Mechanical Engineering Drawing 1 st semester 2005-06

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  1. MEP201Mechanical Engineering Drawing1st semester 2005-06 S R Kale Lecture Wiring Drawings

  2. Wiring - Applications • Power to equipment (grid, back-up) - motors, generators, arc welding, furnace, lathe, A/C, • Connecting computers or DAS - • Power to computers, instruments, … • Product wiring (industrial/consumer); –P-control IC engine, CNC lathe, Robot, Injection molding m/c, Aircraft (300 km), Automobile, Washing machine,… • Illumination – Domestic, Laboratory, Factory, Office, • Plant – Power plant, refinery, food processing, paper mill, • Safety - fire Wiring (2005)

  3. Wiring drawings Input information • Schematic, P&I drawings • Equipment G.A. drawings • Layout drawings • Logic for interlocks Wiring outputs • Wiring schematic/diagram • Wiring/Cable routing (to scale, with BoM) Teams of Electrical, I & C, civil, engineers Wiring (2005)

  4. Types of wiring • Power supply and transmission • I & C signal • Telephone • Data cables Wiring (2005)

  5. Wiring - Construction Conductor • Copper and Cu -alloys • Aluminum • Optic fiber Sheath (insulation, protection, mechanical strength) • Plastic, PVC • Armored • Fabric Diameter, single-multi core, strand, bend-radius Wiring (2005)

  6. Wiring  Piping Similar methodology  Schematic  Line diagram  Use G.A. of equipment + layouts  Prepare routing drawing - 3-D or plan-elevation  Provide supports and joints  Get Bill of Materials Wiring (2005)

  7. Types of wiring diagrams • Wiring schematic (One-line diagram) Power connections • Control system diagram • Interlock wiring / Sequence control wiring • Data bus Wiring (2005)

  8. Power Power Supply - available at one location. Power Demand – supply to each equipment. A.C. No. of phases: 1 or 3 Voltage: 240, 415 V; 3.3, 11, 25, 220, 400, 600 kV Frequency: 50 or 60 Hz.; 400 Hz D.C. ± 3, 5, 6, 9, 12, 14, 24 V (cars, computers, TFT, instruments) ± 1500 V, 500 kV (HVDC) Wiring (2005)

  9. Wiring Elements Wires / Cables Devices Switch, Fuse, Meters, Relays, Circuit breakers, … Equipment Consuming: Lamp, T/L, motor, heater, … Production: Generator, battery, SPV, … Transmission: Transformer, converter, … Wiring (2005)

  10. Domestic wiring E L N M Wiring (2005)

  11. Domestic Wiring ARCHITECTURAL DRAWING/LAYOUT Wiring (2005)

  12. Domestic Wiring MCB Wiring (2005)

  13. Industrial wiring 3 phase, 440 V or more, R-Y-B • Circuit breakers • Relays • Motor starters • Switchgear • Cable size • Transformers • CT, VT • Panel with meters Wiring (2005)

  14. Industrial wiring Layouts and routing (similar to piping) • Cable trench • Cable tray • Cable gallery • Towers Wiring (2005)

  15. Industrial wiring Wiring (2005)

  16. Wiring – Haywire • Missing wires mid-way through construction • Long routing of wires – extra cost • Interference with equipment, piping and structure • Wrong type of cables • Not enough space to lay cables or provide bends Wiring (2005)

  17. Summary Output of wiring diagrams: • Cable sizes and lengths • Routing – cable gallery, cable trench designs • Relay room and cabinets • Electrical panels and cabinets • Switchgear • Scope of supply • Detailing for civil and mechanical works Wiring (2005)

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