SIST EN 2812:2019
(Main)Aerospace series - Stripping of electric cables
Aerospace series - Stripping of electric cables
This document specifies the conditions for stripping and inspection of stripping tools and the stripped
ends of electric cables for aerospace applications.
Various stripping processes exist. The choice of a process depends upon the properties of the particular
cables to be stripped and/or on the specific requirements for the end product to be achieved.
The processes specified today in this document are:
a) manual stripping;
b) mechanical stripping;
c) laser stripping;
d) thermal stripping.
Luft- und Raumfahrt - Abisolieren von elektrischen Leitungen
Dieses Dokument legt die Bedingungen für das Abisolieren und die Überprüfung der Abisolierwerkzeuge und der abisolierten Enden von elektrischen Leitungen zur Verwendung in der Luft und Raumfahrt fest.
Es gibt verschiedene Abisolierverfahren. Die Wahl des Verfahrens hängt von den Eigenschaften der einzel-nen abzuisolierenden Leitungen ab und/oder von den besonderen Anforderungen, die vom Enderzeugnis zu erfüllen sind.
Die gegenwärtig in diesem Dokument festgelegten Verfahren sind:
a) manuelles Abisolieren;
b) mechanisches Abisolieren;
c) Laser-Abisolieren;
d) thermisches Abisolieren.
Série aérospatiale - Dénudages des câbles électriques
Le présent document spécifie les conditions de dénudage et d'inspection des outils de dénudage et les extrémités des câbles électriques dénudés pour application aérospatiale.
Il existe plusieurs procédés de dénudage. Le choix du procédé est en fonction des propriétés particulières des câbles à dénuder et/ou des exigences spécifiques du produit une fois terminé.
Aujourd'hui, les procédés spécifiés dans le présent document sont :
a) dénudage manuel ;
b) dénudage mécanique ;
c) dénudage laser ;
d) dénudage thermique.
Aeronavtika - Odstranjevanje izolacije pri električnih kablih
Ta dokument določa pogoje za odstranjevanje izolacije ter pregled orodij za odstranjevanje in koncev električnih kablov brez izolacije za uporabo v aeronavtiki.
Obstajajo različni načini odstranjevanja izolacije. Izbira postopka je odvisna od lastnosti posameznega kabla, pri katerem se odstrani izolacija, in/ali posebnih zahtev, ki jih mora izpolnjevati končni izdelek.
Postopki, ki so danes določeni v tem dokumentu:
a) ročno odstranjevanje izolacije;
b) mehanično odstranjevanje izolacije;
c) lasersko odstranjevanje izolacije;
d) termično odstranjevanje izolacije.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 2812:2019
01-september-2019
Nadomešča:
SIST EN 2812:2009
Aeronavtika - Odstranjevanje izolacije pri električnih kablih
Aerospace series - Stripping of electric cables
Luft- und Raumfahrt - Abisolieren von elektrischen Leitungen
Série aérospatiale - Dénudages des câbles électriques
Ta slovenski standard je istoveten z: EN 2812:2019
ICS:
29.060.20 Kabli Cables
49.060 Letalska in vesoljska Aerospace electric
električna oprema in sistemi equipment and systems
SIST EN 2812:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 2812:2019
---------------------- Page: 2 ----------------------
SIST EN 2812:2019
EN 2812
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2019
EUROPÄISCHE NORM
ICS 49.060 Supersedes EN 2812:2009
English Version
Aerospace series - Stripping of electric cables
Série aérospatiale - Dénudages des câbles électriques Luft- und Raumfahrt - Abisolieren von elektrischen
Leitungen
This European Standard was approved by CEN on 8 January 2018.
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, Turkey 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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2812:2019 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 2812:2019
EN 2812:2019 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Stripping processes and associated tools. 5
5 Identification, inspection and calibration. 7
6 Qualification. 9
7 Health, safety and environmental aspects . 11
Annex A (normative) Defects illustrations . 13
Annex B (informative) Mechanical stripping . 17
Annex C (informative) Laser stripping . 18
Annex D (informative) Thermal stripping . 19
2
---------------------- Page: 4 ----------------------
SIST EN 2812:2019
EN 2812:2019 (E)
European foreword
This document (EN 2812:2019) 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 December 2019, and conflicting national standards shall
be withdrawn at the latest by December 2019.
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 2812:2009.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: 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, Turkey and the United
Kingdom.
3
---------------------- Page: 5 ----------------------
SIST EN 2812:2019
EN 2812:2019 (E)
1 Scope
This document specifies the conditions for stripping and inspection of stripping tools and the stripped
ends of electric cables for aerospace applications.
Various stripping processes exist. The choice of a process depends upon the properties of the particular
cables to be stripped and/or on the specific requirements for the end product to be achieved.
The processes specified today in this document are:
a) manual stripping;
b) mechanical stripping;
c) laser stripping;
d) thermal stripping.
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 3475-701, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 701: Strippability
and adherence of insulation to the conductor
EN 3719, Aerospace series — Aluminium or aluminium alloy conductors for electrical cables — Product
standard
EN 4434, Aerospace series — Copper or copper alloy lightweight conductors for electrical cables — Product
standard (Normal and tight tolerances)
EN 4651, Aerospace series — Copper-clad aluminium alloy conductors for electrical cables — Product
standard
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4
---------------------- Page: 6 ----------------------
SIST EN 2812:2019
EN 2812:2019 (E)
4 Stripping processes and associated tools
4.1 General recommendations
Precise definition of tools to use on a particular wire or cable standard is under the responsibility of the
user.
It is particularly important to know from which ASD Product Norm conductors are coming (for examples:
EN 2083, EN 3719, EN 4434, EN 4651) for the mechanical stripping process.
Availability of a common tool able to strip different gauges or cable sizes is recommended.
If tools are designed for particular applications, differentiation by colours is recommended.
Size and weight of tools has to be appropriate for the envisaged use.
When it is essential to control the length of insulation to be removed an adjustable abutment must be
part of the tool.
4.2 Manual stripping
4.2.1 Use
The use of this process must be strictly limited to insulations and jackets of the cables for which other
methods are impractical. Nevertheless, with thermal stripping and the arrival of small laser machines,
this manual practice must be progressively eliminated for aerospace use and stay permissible only for
small batches.
4.2.2 Application
Manual stripping by scalpel, razor blade or other cutting tool is carried out on cables over 5 mm²
cross-section, sheaths of shielded cables, fire-resistant cables and coaxial cables, unless another stripping
process is specified.
4.3 Mechanical stripping
4.3.1 Use
This process is generally the most used in particular for single wires. Various power tools are also
adapted to strip round cables, such as single wire screened jacketed and coaxial, and flat cables.
The simplicity of manual pliers makes these tools ideal for work in the field.
For illustration, see Annex B (informative).
4.3.2 Stripping with manual tools
The blades of tools can have different profiles and dimensions. Various assembly shapes are now
available.
A blade can have several marked cavities of different sizes. When the tool is closed, the edges of the blades
shall be in the same plane and form a cutting circumference whose diameter is greater than the maximum
diameter of the conductor of the cable to be stripped. Blades must be replaced as pairs.
5
---------------------- Page: 7 ----------------------
SIST EN 2812:2019
EN 2812:2019 (E)
The manual stripping tools with V shaped cutting blades or shearing type blades are forbidden
(see Figure 1 and Figure 2).
Figure 1 — V shaped cutting blades Figure 2 — Shearing type blades
4.3.3 Stripping with power tools
These tools use blades with the same general characteristics as those defined in 4.3.2.
Particular care is necessary during the use of rotating blades, and their depth shall be adjustable to adapt
the cutting diameter to the need.
4.4 Laser stripping
4.4.1 Use
Laser wire stripping can be carried out on wires and cables of any gauge and on jackets. This process is
particularly suitable for use in applications where damage of any sort to the conductor or the screen is
unacceptable and when the external geometry of the cable to strip is incompatible with mechanical
processes.
More specifically, laser wire stripping is recommended:
1) To process single core wires where the batch to batch variation in conductor diameter exceeds
the tight cutting tolerances compatible with mechanical stripping tools
2) To process the jackets of multi-core shielded cables having a non-circular cross section
3) To provide operator-independent high stripping quality with a high level of repeatability.
For illustration, see Annex C (informative).
4.4.2 Application
Two technologies are currently available: Carbon Dioxide (CO ) laser technology and blue-violet
2
semiconductor lasers technology. Other laser types may be applicable for certain applications.
Low power RF excited CO laser and CW (continuous wave) laser types are recommended. In this context
2
“low power” typically means < 30 Watts average power.
The system shall be designed to guarantee that the laser beam cannot cause damage to the plated metallic
conductor or shield at any time.
Beam power and displacement speed shall be adjustable to be able to cut properly all various types of
insulation and shapes.
6
---------------------- Page: 8 ----------------------
SIST EN 2812:2019
EN 2812:2019 (E)
4.5 Thermal stripping
4.5.1 Use
Thermal wire stripping can be carried out on wires and cables of any gauge and on jackets. This process
is particularly suitable when the external geometry of the cable to strip is incompatible with mechanical
process and when the size of tooling equipment investment must be limited. This process may not be
suitable for all types of insulation or in particular environmental conditions such as where flammable
vapours may be present.
For illustration, see Annex D (informative).
4.5.2 Application
Generally the tool is in two parts, a generator to control the required temperature and a hand unit.
The hand unit can be equipped with various shapes of blades.
5 Identification, inspection and calibration
5.1 Manual stripping tools
5.1.1 Identification
An identification number marked on the main body is recommended in order to facilitate the follow-up
of the inspection of the cutting blade.
5.1.2 Inspection
The inspection of cutting area is carried out visually at regular intervals.
The inspection shall be completed by inspection of samples of stripped cable ends, see 6.3.1.
5.2 Mechanical stripping tools
5.2.1 Identification
An identification number shall be permanently marked on the main body of the tool and on the blade.
In addition, each stripping tool shall have an individual inspection sheet including:
its identification number;
date of first commissioning;
dates of successive inspections;
dates of rectification or repair;
numbers of associated blades.
5.2.2 Inspection
The inspection of blades is carried out with the aid of measuring gauges, shadowgraph, calipers or other
means permitting confirmation that the cavities are in accordance with the dimensions specified.
7
---------------------- Page: 9 ----------------------
SIST EN 2812:2019
EN 2812:2019 (E)
The inspection shall be completed by checking the mechanical condition of the manual tool or power tool
and by stripping tests, followed by inspection of samples of stripped cable ends, see 6.3.2.
For the routine inspection of production tools, the gauging of blades may be omitted, provided double
stripping is used for the inspection of stripped cable ends.
Stripping tools shall be inspected at least every 90 days.
If a worn blade requires replacement, the complete blade assembly shall always be replaced together.
5.2.3 Calibration
Some particular tools, for coaxial cables for example, may require calibration to obtain the necessary
diameter to strip.
5.3 Laser stripping tools
5.3.1 Identification
An identification number shall be permanently marked on the main bo
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.