ROBERT H LECHNER
Engineers in Southampton, PA
License number
Pennsylvania PE024809E
Category
Engineers
Type
Professional Engineer
Address
Address
Southampton, PA 18966
Organization information
See more information about ROBERT H LECHNER at bizstanding.comRobert H Lechner Consult Eng
1360 Ml Crk Rd, Southampton, PA 18966
Industry:
Business Consulting Services
Principal:
Robert Lechner (Principal)
Professional information
Voltage Sensing And Load Measuring Automatic Reclosing System For D-C Circuit Breakers
US Patent:
4232232, Nov 4, 1980
Filed:
Jan 22, 1979
Appl. No.:
6/005190
Inventors:
James P. DeLacy - Havertown PA
Robert H. Lechner - Southampton PA
Robert H. Lechner - Southampton PA
Assignee:
Gould Inc. - Rolling Meadows IL
International Classification:
H02H 1100
US Classification:
307139
Abstract:
A reclosing system for d-c feeder breakers in transit systems employing cars using a chopper type of regulated power is disclosed. The circuit includes voltage-sensing and load-measuring circuits which determine that there is no short circuit on the respective feeder line before the circuit breaker can be closed. The system operates in two sequential modes. The first is a voltage-sensing mode which, upon sensing a voltage on the feeder circuit greater than some given magnitude, will cause the closing of the feeder breaker. If this voltage is not sensed during the voltage-sensing mode, the circuit automatically goes into a load-measuring mode wherein a current is injected into the feeder circuit and the voltage drop caused by the injected current is monitored. If a sufficiently high voltage is produced, which indicates that the feeder circuit is free of a fault, the feeder breaker is closed.