EN 3774-004:2014

Aerospace series - Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A - Part 004: UNC thread terminals - Product standard

This European Standard 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.

Luft- und Raumfahrt - Schutzschalter, dreipolig, temperaturkompensiert, Nennströme von 1 A bis 25 A - Teil 004: UNC-Klemmengewinde - Produktnorm

Diese Norm legt die Eigenschaften dreipoliger Schutzschalter fest, temperaturkompensiert, für Nennströme von 1 A bis 25 A, zur Verwendung im Bordnetz von Luftfahrzeugen bei Temperaturen zwischen 55 °C und 125 °C für Nennströme  15 A und 55 °C bis 90 °C für Nennströme  15 A und in einer maximalen Höhe von 22 000 Metern.
Diese Schutzschalter werden durch einen Druck-Zugtaster (Aktuator) mit zeitgesteuerter Freiauslösung ge-steuert.
Sie sind bis zum Kurzschlussstrom weiterhin funktionsfähig.

Série aérospatiale - Disjoncteurs tripolaires compensés en température, intensités nominales 1 A à 25 A - Partie 004 : Bornes à filetage UNC - Norme de produit

Aeronavtika - Odklopniki, tripolni, temperaturno kompenzirani, nazivni tok od 1 A do 25 A - 004. del: UNC-navojni priključki - Standard za proizvod

Standard EN 3774-004 določa značilnosti tripolnih odklopnikov, temperaturno kompenziranih, z nazivnim tokom od 1 A do 25 A, ki se uporabljajo v letalskih vezjih pri temperaturi med - 55 °C in 125 °C za nazivne vrednosti ≤ 15 A in od - 55 °C do 90 °C za nazivne vrednosti > 15 A na maks. višini 22 000 m. Ti odklopniki se upravljajo z enim gumbom (sprožilom) vrste potisni-povleci z zakasnjenim proženjem brez sprožila . Delovali bodo do kratkega stika.

General Information

• Status: Withdrawn
• Publication Date: 29-Jul-2014
• Withdrawal Date: 23-Apr-2024
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 2 - Electrical
• Ref Project: SIST EN 3774-004:2014 - Aerospace series - Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A - Part 004: UNC thread terminals - Product standard

Relations

• Replaces: EN 3774-004:1999 - Aerospace series - Circuit breakers, three-pole, temperature compensated, rated currents 2 A to 25 A, switching capacity 65 /n - Part 004: UNC thread terminals - Product standard
• Effective Date: 06-Aug-2014
• Replaced By: EN 3774-004:2024 - Aerospace series - Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A - Part 004: UNC thread terminals - Product standard
• Effective Date: 14-Jul-2021

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2014
1DGRPHãþD
SIST EN 3774-004:2002
$HURQDYWLND2GNORSQLNLWULSROQLWHPSHUDWXUQRNRPSHQ]LUDQLQD]LYQLWRNRG$
GR$GHO81&QDYRMQLSULNOMXþNL6WDQGDUG]DSURL]YRG
Aerospace series - Circuit breakers, three-pole, temperature compensated, rated
currents 1 A to 25 A - Part 004: UNC thread terminals - Product standard
Luft- und Raumfahrt - Schutzschalter, dreipolig, temperaturkompensiert, Nennströme von
1 A bis 25 A - Teil 004: UNC-Klemmengewinde - Produktnorm
Série aérospatiale - Disjoncteurs tripolaires compensés en température, intensités
nominales 1 A à 25 A - Partie 004 : Bornes à filetage UNC - Norme de produit
Ta slovenski standard je istoveten z: EN 3774-004:2014
ICS:
49.060 /HWDOVNDLQYHVROMVND Aerospace electric
HOHNWULþQDRSUHPDLQVLVWHPL equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 3774-004
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2014
ICS 49.060 Supersedes EN 3774-004:1999
English Version
Aerospace series - Circuit breakers, three-pole, temperature
compensated, rated currents 1 A to 25 A - Part 004: UNC thread
terminals - Product standard
Série aérospatiale - Disjoncteurs tripolaires compensés en Luft- und Raumfahrt - Schutzschalter, dreipolig,
température, intensités nominales 1 A à 25 A - Partie 004 : temperaturkompensiert, Nennströme von 1 A bis 25 A - Teil
Bornes à filetage UNC - Norme de produit 004: UNC-Klemmengewinde - Produktnorm
This European Standard was approved by CEN on 12 October 2013.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3774-004:2014 E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Dimensions and mass .5
4.1 Dimensional characteristics .5
4.2 Electrical diagram .6
4.3 Mass .6
4.4 Panel mounting .6
5 Characteristics .6
5.1 Material, surface treatment .6
5.2 Mechanical characteristics .7
5.2.1 Fasteners .7
5.2.2 Recommended tightening torque of attaching nut for installation .7
5.2.3 Recommended tightening torque of connection hardware for installation.7
5.2.4 Resistance to vibrations .7
5.2.5 Resistance to shocks .7
5.2.6 Mechanical endurance .7
5.3 Environment characteristics .7
5.3.1 Humidity .7
5.3.2 Corrosion .7
5.3.3 Contaminating liquids .7
5.3.4 Overvoltage caused by lightning .7
5.4 Electrical characteristics .8
5.4.1 Nominal voltage of operational circuits .8
5.4.2 Voltage drop at Ι and low current .8
n
5.4.3 Minimum and maximum tripping thresholds .8
5.4.4 Overload trip .9
5.4.5 Short-circuit values .9
5.4.6 No-load and load endurance . 10
5.4.7 Dielectric rigidity . 10
5.4.8 Insulation resistance . 10
6 Designation . 11
7 Rated current code . 11
8 Delivery codes . 11
9 Marking . 12
10 Technical specification . 12

Foreword
This document (EN 3774-004:2014) has been prepared by the Aerospace and Defence Industries Association
of Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of ASD,
prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by January 2015, and conflicting national standards shall be withdrawn at
the latest by January 2015.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying an
...