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Motor protection and control tips, procedures

  • May 2005
  • Number of views: 645
  • Article rating: No rating

Richard Hughes (deceased)
Pump & Motor Works, Inc.

This series of four articles covers many schemes of motor protection and control.

Topics covered include:

  • Time delay fuses
    • Fuse selection
    • Over-current protection
    • Avoiding fuse overloads
  • Circuit breakers
    • Inputs to electronic protection relays
    • Feeding, protecting a motor starter
    • Common features
  • Motor starters
    • How motor starters operate
    • Light, medium or heavy duty
    • Momentary start button
    • Wye series start, parralel run
    • Variety of controls
  • IEEE and ANSI power system device numbers
  • Dashpot type overload relay
  • Thermal overload relay
  • Current transformer
  • Compact relays
  • Restoring balanced voltage
  • Transient voltages
  • Surge capacitor, surge arrestor

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