Transcription of Overload Relays Catalog - Steven Engineering
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Overload Relays Catalog - Steven Engineering
Overload Relays and Thermal Unit Selection Class 9065 CONTENTSD escriptionPage General Information .. 2-10 Application Data .. 11-14 Approximate Dimensions and Weights .. 15-17 Thermal Unit Selection .. 18-42 1998 Square D All Rights Reserved 2 5/98 INTRODUCTION Overload Relays are intended to protect motors, controllers, and branch-circuit conductors against excessive heating due to prolonged motor overcurrents up to and including locked rotor currents. Protection of the motor and the other branch-circuit components from higher currents, due to short circuits or grounds, is a function of the branch-circuit fuses, circuit breakers, or motor short-circuit motors make up a large percentage of power system loads. Market demands for reduced downtime and increased productivity have compelled the motor control industry to evaluate motor protection technology continuously.
© 1998 Square D All Rights Reserved 2 5/98 INTRODUCTION Overload relays are intended to protect motors, controllers, and branch-circuit conductors against
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