INSTANTANEOUS OVERVOLTAGE PROTECTION FOR AIRCRAFT A.C. GENERATORS.

Abstract

Overvoltage protection in current use on aircraft a.c. systems incorporates a substantial time delay to avoid unwanted tripping with transient voltage rises due to switching etc. Consequently, on the occurrence of a genuine fault, consuming equipment is subjected to an excessive voltage for a considerable time before the fault is cleared. By making overvoltage protection depend on the direction of the change of alternator excitation current as well as on the voltage level, overvoltage faults may be cleared with no deliberate time delay and with no danger of inadvertent operation due to load switching or fault clearance. The circuit and testing of such a form of overvoltage protection are described. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1965
Accession Number
AD0475133

Entities

People

  • R. F. Sims
  • R. L. A. Mckenzie

Organizations

  • Royal Aircraft Establishment

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircraft Equipment
  • Aircrafts
  • Alternators
  • Clearances
  • Excitation
  • Generators
  • Switching
  • Vehicle Equipment
  • Vehicles

Fields of Study

  • Engineering

Readers

  • Educational Psychology
  • Electrical Engineering
  • Neurological Diseases/Conditions/Disorders