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immediate downloadReleased: 2021-07-21
21/30439940 DC
BS EN 3774-004. Aerospace series. Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A Part 004. UNC thread terminals. Product standard
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Standard number: | 21/30439940 DC |
Pages: | 14 |
Released: | 2021-07-21 |
Status: | Draft for Comment |
DESCRIPTION
21/30439940 DC
This standard 21/30439940 DC BS EN 3774-004. Aerospace series. Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A is classified in these ICS categories:
- 49.060 Aerospace electric equipment and systems
This document specifies the characteristics of three-pole circuit breakers, temperature compensated with a rated current from 1 A to 25 A, used in aircraft on-board circuits at a temperature between −55 °C and 125 °C for ratings ≤ 15 A and −55 °C to 90 °C for ratings > 15 A and at an altitude of 22 000 m max.
These circuit breakers are operated by a push-pull type single pushbutton (actuator), with delayed action “trip-free” tripping.
They will continue to function up to the short-circuit current.