EN 2794-001:2023

SLOVENSKI STANDARD
01-januar-2024
Aeronavtika - Odklopniki, enopolni, temperaturno kompenzirani, za naznačene
tokove od 20 A do 50 A - 001. del: Tehnična specifikacija
Aerospace series - Circuit breakers, single-pole, temperature compensated, rated
currents 20 A to 50 A - Part 001: Technical specification
Luft- und Raumfahrt - Schutzschalter, einpolig, temperaturkompensiert, Nennströme von
20 A bis 50 A - Teil 001: Technische Lieferbedingungen
Série aérospatiale - Disjoncteurs unipolaires compensés en température, intensités
nominales 20 A à 50 A - Partie 001 : Spécification technique
Ta slovenski standard je istoveten z: EN 2794-001:2023
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
49.060 Letalska in vesoljska Aerospace electric
električna oprema in sistemi equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 2794-001
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2023
EUROPÄISCHE NORM
ICS 49.060 Supersedes EN 2794-001:2014
English Version
Aerospace series - Circuit breakers, single-pole,
temperature compensated, rated currents 20 A to 50 A -
Part 001: Technical specification
Série aérospatiale - Disjoncteurs unipolaires Luft- und Raumfahrt - Schutzschalter, einpolig,
compensés en température, intensités nominales 20 A temperaturkompensiert, Nennströme von 20 A bis 50
à 50 A - Partie 001 : Spécification technique A - Teil 001: Technische Lieferbedingungen
This European Standard was approved by CEN on 23 July 2023.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2794-001:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Description . 4
5 Design . 5
5.1 Materials . 5
5.1.1 Metallic materials . 5
5.1.2 Insulation materials . 5
5.2 Design . 5
5.2.1 Insulating box . 5
5.2.2 Free release mechanism . 5
5.2.3 Attachment . 5
5.2.4 Electrical connection units . 5
5.2.5 Control actuator . 5
5.2.6 Rating inviolability . 6
5.2.7 Leakage lines . 6
5.2.8 Protection against non-release . 6
6 Characteristics . 6
6.1 General characteristics . 6
6.2 Ratings . 6
6.3 Nominal voltage of operational circuits . 6
6.4 Dimensional characteristics . 7
6.5 Recommended panel mounting dimensions . 7
7 Tests . 7
7.1 Mechanical tests . 7
7.2 Environmental tests . 7
7.3 Electrical tests . 13
8 Qualification tests . 15
8.1 Sampling . 15
8.2 Material tests . 19
8.3 Periodic checks for qualification maintenance . 19
9 Quality assurance . 19
10 Marking . 19
11 Delivery conditions . 19
12 Packaging . 20
13 Storage . 20
13.1 Definition . 20
13.2 Storage conditions . 20
13.3 Storage duration . 20
Bibliography . 21

European foreword
This document (EN 2794-001:2023) 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 document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document shall be given the status of a national standard, either by publication of an identical text
or by endorsement, at the latest by May 2024, and conflicting national standards shall be withdrawn at
the latest by May 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 2794-001:2014.
The main changes with respect to the previous edition are as follows:
— prEN 2794-001 (P2), 02/2012 — Editorial revision of this document: g replaced by g-PK for
n
sinusoidal and low frequencies, g replaced by Grms for random.
n
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this document: Austria, Belgium, Bulgaria, Croatia, Cyprus,
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
1 Scope
This document specifies the single-pole temperature compensated circuit breakers rated from 20 A to
50 A and used in aircraft on-board circuits. It describes specific environmental, electrical and
mechanical characteristics and the stringency of tests to be applied according to test methods of
EN 3841-100.
These circuit breakers are intended for use in aircraft with electrical supplies in accordance with
EN 2282 (all categories).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 2083, Aerospace series — Copper or copper alloy conductors for electrical cables — Product standard
EN 2282, Aerospace series — Characteristics of aircraft electrical supplies
EN 2825, Aerospace series — Burning behaviour of non-metallic materials under the influence of
radiating heat and flames — Determination of smoke density
EN 2826, Aerospace series — Burning behaviour of non-metallic materials under the influence of
radiating heat and flames — Determination of gas components in the smoke
EN 3841-*, Aerospace series — Circuit breakers — Test methods
EN 3844-1, Aerospace series — Flammability of non-metallic materials — Part 1: Small burner test,
vertical — Determination of the vertical flame propagation
TR 6083, Aerospace series — Cut-outs for installation of electrical components
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 3841-100 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
4 Description
These circuit breakers are operated by a “push-pull” type single push button (actuator) and with
delayed action “trip-free” tripping. Their function is ensured up to the short-circuit current.

Published as ASD-STAN Standard at the date of publication of this document by AeroSpace and Defence
industries Association of Europe — Standardization (ASD-STAN), https://www.asd-stan.org/.
*
All parts quoted in this document.
2)
Published as ASD-STAN Technical Report at the date of publication of this document. http://www.asd-
stan.org/.
5 Design
5.1 Materials
5.1.1 Metallic materials
All metallic parts shall be resistant to corrosion or finished against corrosion. When dissimilar materials
are in close contact, an adequate protection against corrosion shall be used so that the electromotive
force of the galvanic couple does not exceed 0,25 V.
...