Thomas J Mcnamara

US Patent:

20120182669, Jul 19, 2012

Filed:

Sep 14, 2010

Appl. No.:

13/496699

Inventors:

Robert A. Patten - Deltona FL, US
Robert S. Kambach - Lake Mary FL, US
Thomas P. McNamara - Lake Mary FL, US

Assignee:

ABB Technology AG - Zurich

International Classification:

H02B 1/20
H01F 27/04

US Classification:

361637, 16 21

Abstract:

A rear panel for a draw-out circuit breaker includes a metal plate having a pair of rectangular cutouts. Two bushing blocks are joined together and at least partially extend through the cutouts. Each molded bushing block includes three bushings, each of which carry an electrical conductor that is over-molded therein.

US Patent:

20120194344, Aug 2, 2012

Filed:

Jul 8, 2009

Appl. No.:

13/375995

Inventors:

Thomas P. McNamara - Lake Mary FL, US
Harshavardhan M. Karandikar - Longwood FL, US
Marek Budyn - Krakow, PL
Michael G. Urmson - Bismarck ND, US

Assignee:

ABB Research Ltd - Zurich

International Classification:

G08B 21/18

US Classification:

340584

Abstract:

A method and system is disclosed for monitoring switchgear. The current supplied to the main bus is measured. The current flowing through a plurality of feeder circuits is also measured. The temperature of the main bus at one or more nodes is measured, wherein a node is a connection point between the main bus and each feeder circuit. The current flowing through one of the nodes is determined by subtracting the current flow through each the feeder circuit upstream from the node, from the current supplied by the input circuit. An alarm condition is determined if the temperature at a node exceeds a predetermined temperature value for a given current flow through the node. The alarm condition is thereafter displayed to a switchgear operator.