Introduction

Card Set Information

Author:
mike9111
ID:
208690
Filename:
Introduction
Updated:
2013-03-21 04:25:32
Tags:
motor starters
Folders:

Description:
motor starters
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  1. What factors must a motor starter allow for?
    • -Ease of starting and stopping by operator
    • -Prevention of automatic restarting after power failure, if unexpected restarting might cause injury to the operator
    • -Automatic overload protection for motors exceeding 370W rating
    • -Phase failure or reversal of phase rotation protection, if this is liable to cause injury or damage
    • -Provision for the remote starting and stopping of a motor, should this be required
  2. When controlling a motors speed, across what range of conditions should the controller operate?
    Full load and no load conditions
  3. Two ways speed control can be achieved for Universal single phase motors are?
    • -Tapped field winding
    • -Continuously rated variable resistance
  4. Two ways speed control can be achieved for three phase motors are?
    • -Frequency
    • -Pairs of poles

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