Accession Number : AD0695649

Title :   TRANSIENT TRIPPING OF DC CIRCUIT BREAKER POWER SUPPLY PP-2953B/U.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : Dudley,William L. ; Cannon,Melvin E.

Report Date : AUG 1969

Pagination or Media Count : 20

Abstract : Field tests and depot tests of Radio Terminal Set AN/GRC-163 and Radio Set AN/VRC-47 indicate that the DC circuit breaker on Power Supply PP-2953B/U opens when these systems are run on high power. Cause of the problem is identified by analysis of dynamic system performance. System deficiency is corrected by changing to a breaker with a higher trip current rating and longer delay time. Attendant design changes to the voltage control circuitry to protect the solid-state devices against destructive overload conditions are described. A modification has been devised to make the PP-2953B/U compatible with the AN/GRC-163 and AN/VRC-47 systems. The modification can be quickly and satisfactorily implemented by depot retrofit of existing power supply items. (Author)

Descriptors :   (*CIRCUIT BREAKERS, *RADIO EQUIPMENT), POWER SUPPLIES, FAILURE, TRANSIENTS, COMPATIBILITY, PERFORMANCE(ENGINEERING)

Subject Categories : Electrical and Electronic Equipment
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE