Citation
(2007), "Remote control circuit breaker for aircraft electrical systems", Aircraft Engineering and Aerospace Technology, Vol. 79 No. 5. https://doi.org/10.1108/aeat.2007.12779ead.014
Publisher
:Emerald Group Publishing Limited
Copyright © 2007, Emerald Group Publishing Limited
Remote control circuit breaker for aircraft electrical systems
Remote control circuit breaker for aircraft electrical systems
E-T-A Circuit Breakers has introduced the E-T-A 4930, a new remotely controlled, single pole circuit breaker (RCCB) approved to MIL-PRF-83383 for the protection of aircraft electrical systems and other high performance applications. Low-current remote switching is achieved through the use of a conventional, manually operated aircraft-style thermal circuit breaker such as E-T-A types 4120 or 483: thus, the 4930 can be placed close to the system it is protecting and wiring harnesses and hence weight can be significantly reduced.
The E-T-A 4930 utilises an integral bi- stable linear motor to switch the contacts. Its On/Off status will synchronise with the 4120/483 circuit breaker, matching the status of that controlling circuit breaker. If power is applied to a de-energised 4930, it will adopt the same switching status as the control circuit breaker; and if the RCCB trips in the event of a load circuit fault, the control circuit breaker will trip, thus providing a visual indication of the fault. In the event of a short circuit, the switching circuits of the RCCB will not cycle between On and Off.
The new E-T-A 4930 Remote Control Circuit Breaker is available in a range of current ratings from 5 to 100A and can be supplied with or without auxiliary contacts which can provide external signalling. It is temperature compensated: it features a bi-metal actuator which trips the mechanism within a specified time under overcurrent conditions.
Details available from: E-T-A Circuit Breakers Ltd, Tel: +44 (0)1296 420336, Fax: +44 (0) 1296 488497, E-mail: info@e-t-a.co.uk