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Electrical Power. J. Mitchell for AE-210. What Does Electrical Power Do?. Provides Energy for Buildings Usually all except Heating. How is that Power Used?. User’s Equipment Computers Machinery etc. Lighting Major Equipment Emergency. Review of Basics.

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electrical power

Electrical Power

J. Mitchell for AE-210

what does electrical power do
What Does Electrical Power Do?
  • Provides Energy for Buildings
    • Usually all except Heating
how is that power used
How is that Power Used?
  • User’s Equipment
    • Computers
    • Machinery etc.
  • Lighting
  • Major Equipment
  • Emergency
review of basics
Review of Basics
  • Power (P) is a constant = Volts * Amps (V*A)
  • Lost power = Current2 * Resistance (I2*R)
    • Therefore making current as small as possible reduces lost power
  • Can Transform Power
    • When Increase Voltage, Decrease Current
    • Therefore long distance at very high voltages
distribution of power
Distribution of Power
  • Power companies make far from where we need it
  • Transform it to high AC Voltage to reduce current so little lost in transmission
    • Typically 230,000 Volts or higher
    • Must have big separation between wires – therefore the transmission lines we see.
  • “Step” it down as gets to end user
    • Transformers we see at substations on Poles etc.
transformers
Transformers

Rated in KVA – Kilo-Volt Amperes

This is a 1000KVA Transformer

substation
Substation
  • Consists of
    • Fuse
    • Meters
    • Transformer
    • Switches / Panels
    • Conduits Leading out
distribution runs in buildings
Distribution Runs In Buildings
  • Chases – Vertical shafts allowing runs
  • Bus Duct - allows exposed wires
  • Conduit & EMT -
distribution panels in buildings
Distribution Panels in Buildings
  • Contain Circuit Breakers