Multiplexed Computer-Controlled Protective System
Abstract
A computer-controlled system is described for protecting a feeder circuit (or power supply) and one or more branch load circuits, each circuit supplied by a power buss fed through current sensors. Each of the source and branch circuits has a current sensor in each positive and negative leg and a set of contacts (circuit interrupters) in each leg. The current sensors feed data to a microcomputer which stores fault-condition information for each separate sensed circuit. The data fed into the computer is compared to the stored information in look-up tables and, when a fault-condition is sensed, the computer sends a fault output signal to the current interrupter associated with the circuit from which the fault signal has come, the fault output signal acting to open the contacts in that circuit and inactivate it. If the fault condition is severe, the source interrupter is activated immediately, the branch circuit interrupter is then opened and the computer then directs the closing of the source interrupter. The branch circuit interrupters, however, are not closed until the fault condition is cleared. The whole operation and sequence of events before, during, and following fault conditions is performed automatically and managed by the computer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 23, 1981
- Accession Number
- ADD008725
Entities
People
- John A. Brandy Jr
Organizations
- United States Department of the Navy