BS EN 2665-003 is a standard that covers three-pole circuit breakers for aerospace applications to ensure the prevention of electrical failures in aerospace electrical systems.
BS EN 2665-003 specifies the required characteristics for three-pole, temperature compensated circuit breakers, rated currents from 20 A to 50 A, metric thread terminals, for use in aircraft electrical systems, at temperatures between – 55 °C and 90 °C and at a maximum altitude of Z = 15000 m.
BS EN 2665-003 shall be used together with EN 2665-001. These circuit breakers are intended for use in aircraft with electrical supplies in accordance with EN 2282.
BS EN 2665-003 on three-pole circuit breakers for aerospace applications applies to:
Circuit breakers are mechanical devices that interrupt and isolate a circuit when it is overloaded with the current. In many aeroplanes, circuit breakers act as an on/off switch. In aerospace applications, they are designed to prevent too much power from flowing into and overheating a shorted circuit to ensure the safety of systems.
BS EN 2665-003 provides users guidance on required characteristics for circuit breakers, including short-circuit performance, dimensions, mounting, electrical connections, fasteners and mass, enabling you to develop circuit breakers for compatible installations, stable operability and functionality in aerospace applications.
With obedience and compliance to BS EN 2665-003, users can develop and assess three-pole circuit breakers for risk reduction and prevention of hazards in aerospace operations.
EN 2665-003:1999