NEMA Contactors and Starters - Tri-State Electrical Supply
NEMA Contactors and Starters - Tri-State Electrical Supply
NEMA Contactors and Starters - Tri-State Electrical Supply
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<strong>NEMA</strong> <strong>Contactors</strong> <strong>and</strong> <strong>Starters</strong><br />
A200 Series<br />
33.2<br />
Type FT Fast <strong>Tri</strong>p, Class 10<br />
Contents<br />
Description<br />
Page<br />
<strong>Contactors</strong>—Non-Reversing <strong>and</strong> Reversing . . . . . . . . . . . . . 64<br />
<strong>Starters</strong>—Non-Reversing <strong>and</strong> Reversing . . . . . . . . . . . . . . . 70<br />
Relays—Thermal <strong>and</strong> Fast <strong>Tri</strong>p . . . . . . . . . . . . . . . . . . . . . . . 91<br />
Thermal Type B, Class 20, Manual Reset. . . . . . . . . . . . . . . 93<br />
Thermal Type A, Class 20, Auto/Manual Reset . . . . . . . . . . 96<br />
Type FT Fast <strong>Tri</strong>p, Class 10<br />
Product Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100<br />
Technical Data <strong>and</strong> Specifications . . . . . . . . . . . . . . . . . . 100<br />
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101<br />
Heater Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102<br />
Relays—Current Sensing Protective . . . . . . . . . . . . . . . . . . 104<br />
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Type FT Fast <strong>Tri</strong>p, Class 10<br />
Application Description<br />
The Type FT overload relay is<br />
designed to protect special<br />
purpose motors having<br />
restricted thermal <strong>and</strong> locked<br />
rotor capabilities. Using<br />
modern block type, bimetallic<br />
design, this relay will provide<br />
Class 10 operation in singleor<br />
three-phase applications.<br />
Operation<br />
The Type FT overload relay is<br />
a bimetallic actuated device.<br />
The bimetal elements are<br />
operated directly from line<br />
current, thus separate<br />
calibrating heater elements<br />
are not utilized. The overload<br />
relay may be wired directly in<br />
the motor circuit, or throughcurrent<br />
transformers on<br />
applications larger than 150A.<br />
As the bimetals are heated by<br />
motor current flow, a<br />
deflection force is produced.<br />
Upon a sustained level of<br />
abnormal current flow, the<br />
deflection becomes great<br />
enough to open the snap<br />
action output contact.<br />
Features<br />
● Class 10—600V design<br />
● Inverse time delay trip<br />
● Color coded reset rod—<br />
green<br />
● Alarm contact factory<br />
available<br />
● Field selectable manual/<br />
auto reset<br />
● Adjustable trip rating<br />
±20%<br />
● Ambient compensation<br />
included<br />
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Control Products Catalog CA08102001E—August 2010 www.eaton.com 99
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