If you do not want a motor to re- start when power is lost, then is
If you do not want a motor to re- start when power is lost, then is
If you do not want a motor to re- start when power is lost, then is
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Protecting Large<br />
Horse<strong>power</strong> Mo<strong>to</strong>rs (2 of 3)<br />
• Cur<strong>re</strong>nt<br />
transformers<br />
used <strong>to</strong> <strong>re</strong>duce<br />
overload heater<br />
cur<strong>re</strong>nt<br />
Protecting Large<br />
Horse<strong>power</strong> Mo<strong>to</strong>rs (3 of 3)<br />
• The Cur<strong>re</strong>nt<br />
transformers<br />
provide the<br />
cur<strong>re</strong>nt for the<br />
OL Heaters.<br />
Remote Reset (Larger Mo<strong>to</strong>rs) C.T. Example<br />
Short-Term Memory Test:<br />
What <strong>do</strong>es an Overload <strong>do</strong>?<br />
1) In th<strong>is</strong> case, <strong>If</strong> the FLC of the <strong>mo<strong>to</strong>r</strong> <strong>is</strong><br />
100A, what would the OLs see at FLC?<br />
2) What would the Typical OL Setting be?<br />
What a<strong>re</strong> the 2 sections of an<br />
Overload?<br />
3/3/2013<br />
8
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