BSI 21/30439940 DC:2021 Edition

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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

Published By	Publication Date	Number of Pages
BSI	2021	14

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Description

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.

Additional information

Status	Definitive
Pages	14
Publication Date	2021-07-21
Standard Number	21/30439940 DC
Title	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
Identical National Standard Of	prEN 3774-004
Descriptors	Electrical connections, Tri-pole circuit-breakers, Holes, Electric terminals, Seatings, Fixing, Temperature, Circuit-breakers, Nuts, Switchgear, Washers, Mass, Electrical protection equipment, Screws (bolts), Short-circuit currents, Making capacity, Breaking capacity, Testing conditions, Environment (working), Designations, Rated current, Short-circuit current tests, Unified screw threads, Aircraft components, Dimensions, Bolts
Publisher	BSI
Committee	ACE/6
ICS Codes	49.060 - Aerospace electric equipment and systems

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BSI 21/30439940 DC:2021 Edition

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