DocumentCode
1347149
Title
Protecting A-C motors with low-voltage air-circuit-breaker series trips
Author
Brightman, F. P. ; McGee, R. R. ; Reifschneider, P. J.
Author_Institution
General Electric Company, in Schenectady, N. Y., Plainville, Conn.; Philadelphia, Pa., respectively
Volume
76
Issue
3
fYear
1957
fDate
7/1/1957 12:00:00 AM
Firstpage
114
Lastpage
119
Abstract
LOW-VOLTAGE air circuit breakers are sometimes used alone as motor starters, since they provide in a single device the various elements of a motor-branch circuit as required by the National Electrical Code. The purpose of this paper is to discuss the effectiveness of the direct-acting series trips used on such breakers as a means of protecting squirrel-cage motors in the event of: 1. Locked or stalled rotor, either during starting or running. 2. Overheating due to prolonged moderate overloads. 3. Short circuits in the motor or in connections to it.
Keywords
Circuit breakers; Delay; Heating; Induction motors; Rotors; Standards; Torque;
fLanguage
English
Journal_Title
American Institute of Electrical Engineers, Part II: Applications and Industry, Transactions of the
Publisher
ieee
ISSN
0097-2185
Type
jour
DOI
10.1109/TAI.1957.6367214
Filename
6367214
Link To Document