EN 50525-2-51:2011

SLOVENSKI STANDARD
01-september-2011
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Electric cables - Low voltage energy cables of rated voltages up to and including 450/750
V (U0/U) - Part 2-51: Cables for general applications - Oil resistant control cables with
thermoplastic PVC insulation
Kabel und Leitungen - Starkstromleitungen mit Nennspannungen bis 450/750 V (U0/U) -
Teil 2-51: Starkstromleitungen für allgemeine Anwendungen - Ölbeständige
Steuerleitungen mit thermoplastischer PVC-Isolierung
Câbles électriques - Câbles d’énergie basse tension de tension assignée au plus égale à
450/750 V (U0/U) - Partie 2-51: Câbles pour applications générales - Câbles de contrôle
résistants à l’huile, isolés en PVC thermoplastique
Ta slovenski standard je istoveten z: EN 50525-2-51:2011
ICS:
29.060.20 Kabli Cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50525-2-51
NORME EUROPÉENNE
May 2011
EUROPÄISCHE NORM
ICS 29.060.20 Supersedes HD 21.13 S1:1995 + A1:2001

English version
Electric cables -
Low voltage energy cables of rated voltages up to and including 450/750 V
(U /U) -
Part 2-51: Cables for general applications -
Oil resistant control cables with thermoplastic PVC insulation

Câbles électriques -  Kabel und Leitungen -
Câbles d’énergie basse tension de tension Starkstromleitungen mit Nennspannungen
assignée au plus égale à 450/750 V bis 450/750 V (U /U) -
(U /U) -
Teil 2-51: Starkstromleitungen für
Partie 2-51: Câbles pour applications allgemeine Anwendungen -
générales - Ölbeständige Steuerleitungen mit
Câbles de contrôle résistants à l’huile, thermoplastischer PVC-Isolierung
isolés en PVC thermoplastique
This European Standard was approved by CENELEC on 2011-01-17. CENELEC 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 Central Secretariat or to any CENELEC 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 CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50525-2-51:2011 E
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 20, Electric
cables.
The text of the draft was submitted to the formal vote and was approved by CENELEC as
EN 50525-2-51 on 2011-01-17.
This document, which is one of a multipart series, supersedes HD 21.13 S1:1995 + A1:2001.

Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any
or all such patent rights.
The following dates were fixed:

– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2012-01-17

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-01-17

__________
- 3 - EN 50525-2-51:2011
Contents
Page
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 General purpose cables . 5
4.1 Control cables – H05VV5-F . 5
4.2 Screened control cables – H05VVC4V5-K . 6
Annex A (normative) Tests for cables to EN 50525-2-51 . 8
Annex B (normative) General data . 9
Annex C (normative) Dimensional calculations for cables with a non-preferred number
of cores . 13
C.1 Inner sheath . 13
C.2 Screen . 13
C.3 Sheath . 13
Annex D (normative) Requirements for compatibility test . 15
D.1 Test conditions . 15
D.2 Requirements . 15
Bibliography . 16
Tables
Table A.1 . 8
Table B.1 – Unscreened cables . 9
Table B.2 – Screened cables . 11
Table D.1 . 15

1 Scope
This European Standard applies to oil resistant polyvinyl chloride insulated and sheathed
flexible cables. Screened and non-screened types are included.
The cables are of rated voltages U /U 300/500 V.
The cables are intended for the interconnection of manufacturing machines.
The maximum conductor operating temperature for the cables in this standard is 70 °C.
NOTE HD 516 contains extensive guidance on the safe use of cables in this standard.
This EN 50525-2-51 should be read in conjunction with EN 50525-1, which specifies general
requirements.
2 Normative references
The following referenced documents are indispensable for the application 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.
NOTE One or more references to the standards below are in respect of a specific sub-division of that standard,
for instance a clause, a table, a class or a type. Cross-references to these standards are undated and, at all times,
the latest version applies.
EN 50363-3 Insulating, sheathing and covering materials for low voltage energy
cables – Part 3: PVC insulating compounds
EN 50363-4-1 Insulating, sheathing and covering materials for low voltage energy
cables – Part 4-1: PVC sheathing compounds
EN 50395 Electrical test methods for low voltage energy cables
EN 50396 Non electrical test methods for low voltage energy cables
EN 50525-1 Electric cables – Low voltage energy cables of rated voltages up to and
including 450/750 V (U /U) – Part 1: General requirements
EN 60228 Conductors of insulated cables (IEC 60228)
EN 60332-1-2 Tests on electric and optical fibre cables under fire conditions –
Part 1-2: Test for vertical flame propagation for a single insulated wire
or cable – Procedure for 1 kW pre-mixed flame (IEC 60332-1-2)
EN 60811-1-2 Insulating and sheathing materials of electric and optical cables –
Common test methods – Part 1-2: General application – Thermal
ageing methods (IEC 60811-1-2)
EN 60811-1-4 Insulating and sheathing materials of electric and optical cables –
Common test methods – Part 1-4: General application – Tests at low
temperature (IEC 60811-1-4)
HD 308 Identification of cores in cables and flexible cords
IEC 60502-1 2004 Power cables with extruded insulation and their accessories for rated
voltages from 1 kV (U = 1,2 kV) up to 30 kV (U = 36 kV) – Part 1:
m m
Cables for rated voltages of 1 kV (U = 1,2 kV) and 3 kV (U = 3,6 kV)
m m
- 5 - EN 50525-2-51:2011
3 Terms and definitions
For the purposes of this document the terms and definitions given in Clause 3 of EN 50525-1
apply.
4 General purpose cables
4.1 Control cables – H05VV5-F
4.1.1 Construction
4.1.1.1 Conductor
The conductor shall be class 5, according to EN 60228.
4.1.1.2 Sizes of cable
2 2
The sizes of cable shall be 0,5 mm to 2,5 mm .
The number of conductors shall be from 2 up to 60.
NOTE The preferred number of conductors is one of the following: 2, 3, 4, 5, 6, 7, 12, 18, 27, 36, 48 and 60.
4.1.1.3 Insulation
The insulation shall be polyvinyl chloride compound of Type TI 2 to EN 50363-3.
4.1.1.4 Assembly
The cables shall be assembled as follows:
The cores shall be twisted together, if necessary in several concentric layers.
A tape may be applied over each layer. It may cover the cores partly or fully.
For two core cables, the space between the cores shall be filled either by separate fillers or
by the sheath filling the interstices.
A centre-core is not permitted.
NOTE A centre-filler of suitable material may be applied.
Assemblies with three or more cores shall have one core coloured green-and-yellow.
4.1.1.5 Core identification
For cables with up to and including five cores, identification shall either be as for cables with
more than five cores, or by colours in accordance with HD 308.
For cables with more than five cores, the identification shall be in accordance with Annex D
of EN 50525-1.
4.1.1.6 Sheath
The sheath shall be polyvinyl chloride compound of Type TM 5 to EN 50363-4-1.
It is permitted for the sheath to fill the spaces between the cores, thus forming a filling.

4.1.1.7 Marking
The cable shall be marked with the CENELEC code H05VV5-F. The marking shall comply
with Clause 6 of EN 50525-1.
4.1.2 Requirements
Each cable shall comply with the appropriate requirements given in EN 50525-1, and the
particular requirements of this Part.
Testing shall be in accordance with Annex A, and the relevant tests indicated in column 6.
The dimensions of the cables shall conform to Table B.1 for the relevant size.
NOTE For cables with a non-preferred number of cores, see Annex C.
The requirements to be met for the compatibility test shall be as given in Annex D.
4.2 Screened control cables – H05VVC4V5-K
4.2.1 Construction
4.2.1.1 Conductor
The conductor shall be class 5, according to EN 60228.
4.2.1.2 Sizes of cable
2 2
The sizes of cable shall be 0,5 mm to 2,5 mm .
The number of conductors shall be from 2 up to 60.
NOTE The preferred number of conductors is one of the following: 2, 3, 4, 5, 6, 7, 12, 18, 27, 36, 48 and 60.
4.2.1.3 Insulation
The insulation shall be polyvinyl chloride compound of Type TI 2 to EN 50363-3.
4.2.1.4 Assembly
The cables shall be assembled as follows:
The cores shall be twisted together, if necessary in several concentric layers.
A tape may be applied over each layer. It may cover the cores partly or fully.
For two core cables, the space between the cores shall be filled either by separate fillers or
by the inner sheath filling the interstices.
A centre-core is not permitted.
NOTE A centre-filler of suitable material may be app
...