Electric Motor Control

10th Edition
Publisher: CENGAGE L
ISBN: 9781133702818



Electric Motor Control

10th Edition
Publisher: CENGAGE L
ISBN: 9781133702818
Chapter 7, Problem 9SQ
Textbook Problem

What is optoisolation?

To determine

Define optoisolation.

Explanation of Solution


Solid-state relays are sealed against moisture and dirt. In these relays, line voltage is isolated from input or control voltage, so that electrical noise and voltage spikes are prevented from transmitting into the control section. Solid-state relays are used to control AC or DC loads.

In solid-state relay, two methods that are used to the input to control the relay operation are as follows:

  1. 1. Reed relay.
  2. 2. Optoisolation.

In the optoisolation method, the light-emitting diode (LED) and photo-sensitive components are used to control the relay...

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