Vacuum contactor retrofit of a low-voltage power circuit breaker

Conference · Sun Dec 31 00:00:00 EST 1995

OSTI ID:397864

Fischer, J D ^[1]

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1. Air Products and Chemicals, Inc., Allentown, PA (United States)

Due to a misapplication of low-voltage power circuit breakers on high-cycling motor-starting services, the electrically operated mechanisms failed due to the large number of spring-charging, closing and opening cycles. Various options for correcting the problem were evaluated, and a vacuum contactor retrofit of the circuit breaker was selected for some of them. The vacuum starter units are electrically and mechanically interchangeable with the power circuit breakers. The paper discusses the design considerations and operating differences resulting from the technology conversion. It also discusses the differences in rating, function, and application.

• OSTI ID: 397864
• Report Number(s): CONF-9505342-; ISBN 0-7803-2480-3; TRN: IM9649%%72
• Resource Relation: Conference: 1995 IEEE industrial and commercial power systems technical conference, San Antonio, TX (United States), 7-11 May 1995; Other Information: PBD: 1995; Related Information: Is Part Of 1995 IEEE industrial and commercial power systems technical conference; PB: 225 p.
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
CIRCUIT BREAKERS
ELECTRIC CONTACTS
RETROFITTING
POWER DISTRIBUTION SYSTEMS
INDUSTRIAL PLANTS