BRITISH STANDARD

Signalling on
low-voltage electrical
installations in the
frequency range 3 kHz
to 148,5 kHz —
Part 4-6: Low voltage decoupling
filters — Phase coupler

The European Standard EN 50065-4-6:2004 has the status of a
British Standard

ICS 31.160; 33.040.30; 97.120

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BS EN
50065-4-6:2004


BS EN 50065-4-6:2004

National foreword
This British Standard is the official English language version of
EN 50065-4-6:2004.
The UK participation in its preparation was entrusted to Technical Committee
PEL/205, Mains signalling, which has the responsibility to:
—

aid enquirers to understand the text;

—

present to the responsible international/European committee any
enquiries on the interpretation, or proposals for change, and keep the
UK interests informed;

—

monitor related international and European developments and
promulgate them in the UK.

A list of organizations represented on this committee can be obtained on
request to its secretary.
Cross-references
The British Standards which implement international or European
publications referred to in this document may be found in the BSI Catalogue
under the section entitled “International Standards Correspondence Index”, or
by using the “Search” facility of the BSI Electronic Catalogue or of British
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Compliance with a British Standard does not of itself confer immunity
from legal obligations.

This British Standard was
published under the authority
of the Standards Policy and
Strategy Committee on
25 November 2004


Summary of pages
This document comprises a front cover, an inside front cover, the EN title page,
pages 2 to 8, an inside back cover and a back cover.
The BSI copyright notice displayed in this document indicates when the
document was last issued.

Amendments issued since publication
Amd. No.
© BSI 25 November 2004

ISBN 0 580 44889 4

Date

Comments


EUROPEAN STANDARD

EN 50065-4-6

NORME EUROPÉENNE
EUROPÄISCHE NORM

July 2004

ICS 31.160; 33.040.30; 97.120

English version


Signalling on low-voltage electrical installations
in the frequency range 3 kHz to 148,5 kHz
Part 4-6: Low voltage decoupling filters –
Phase coupler
Transmission de signaux sur les réseaux
électriques basse tension dans la bande
de fréquences de 3 kHz à 148,5 kHz
Partie 4-6: Filtres basse tension
de découplage –
Coupleur de phase

Signalübertragung auf elektrischen
Niederspannungsnetzen
im Frequenzbereich 3 kHz bis 148,5 kHz
Teil 4-6: NiederspannungsEntkopplungsfilter –
Phasenkoppler

This European Standard was approved by CENELEC on 2004-03-01. 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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.


CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50065-4-6:2004 E


EN 50065-4-6:2004

–2–

Foreword
This European Standard was prepared by SC 205A, Mains communicating systems, of Technical
Committee CENELEC TC 205, Home and Building Electronic Systems (HBES).
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by
CENELEC as EN 50065-4-6 on 2004-03-01.
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)


2005-03-01

latest date by which the national standards conflicting
with the EN have to be withdrawn

(dow)

2007-03-01

EN 50065 consists of several parts, under the general title: Signalling on low-voltage electrical
installations in the frequency range 3 kHz to 148,5 kHz
Part 1

General requirements, frequency bands and electromagnetic disturbances

Part 2-1

Immunity requirements for mains communications equipment and systems
operating in the range of frequencies 95 kHz to 148,5 kHz and intended for use in
residential, commercial and light industrial environments

Part 2-2

Immunity requirements for mains communications equipment and systems
operating in the range of frequencies 95 kHz to 148,5 kHz and intended for use in
industrial environments

Part 2-3

Immunity requirements for mains communications equipment and systems

operating in the range of frequencies 3 kHz to 95 kHz and intended for use by
electricity suppliers and distributors

Part 4-1

Low voltage decoupling filters – Generic specification

Part 4-2 *)

Low voltage decoupling filters – Safety requirements

Part 4-3

Low voltage decoupling filters – Incoming filter

Part 4-4

Low voltage decoupling filters – Impedance filter

Part 4-5

Low voltage decoupling filters – Segmentation filter

Part 4-6

Low voltage decoupling filters – Phase coupler

Part 4-7 *)

Portable low voltage decoupling filters - Safety requirements


Part 7

Equipment impedance
__________

———————
*) This part covers the extended frequency ranges 3 kHz to 148,5 kHz and 1,6 MHz to 30 MHz.


–3–

EN 50065-4-6:2004

Contents
1

Scope ...............................................................................................................................................4

2

Normative references .....................................................................................................................4

3

Definitions .......................................................................................................................................5

4

Classification...................................................................................................................................5


5

4.1

Type 1 (standard type) ...........................................................................................................5

4.2

Type 2 (low leakage type) ......................................................................................................5

Requirements ..................................................................................................................................5
5.1

Marking ...................................................................................................................................5

5.2

Electrical characteristics at mains frequency .........................................................................5

5.3

5.2.1

Over voltage ..............................................................................................................6

5.2.2

Immunity ....................................................................................................................6


5.2.3

Mains frequency leakage current ..............................................................................6

Electrical characteristics at signalling frequency....................................................................7
5.3.1

Operating frequency range ........................................................................................7

5.3.2

Transfer function........................................................................................................7

5.3.3

Impedance .................................................................................................................7

Figure 1 – Mains frequency leakage current test set up ..........................................................................6

Table 1 – Mains frequency leakage current limits ....................................................................................6

Annex A (normative) Special national conditions .....................................................................................8


EN 50065-4-6:2004

1

–4–


Scope

This European Standard applies to phase couplers in a mains communication system for phase to
neutral voltage not exceeding 250 V a.c. and a nominal current not exceeding 125 A, intended for
household and similar fixed installation including residential, commercial and light industrial buildings.
This European Standard applies to phase couplers used to control the coupling of communication
signals between phases or sections of a mains communication system.
A “phase coupler” may be used to achieve coupling between the phases of a multiphase installation,
or to provide bridging of signals around other system components.
The standard defines
−

the requirements to ensure a minimum coupling between the sections, and

−

the requirements to ensure no change on the safety of the electrical installation.

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.
EN 50065-2-1

Signalling on low-voltage electrical installations in the frequency range 3 kHz to
148,5 kHz – Part 2-1: Immunity requirements for mains communications
equipment and systems operating in the range of frequencies 95 kHz to 148,5 kHz

and intended for use in residential, commercial and light industrial environments

EN 50065-2-2

Signalling on low-voltage electrical installations in the frequency range 3 kHz to
148,5 kHz – Part 2-2: Immunity requirements for mains communications
equipment and systems operating in the range of frequencies 95 kHz to 148,5 kHz
and intended for use in industrial environments

EN 50065-2-3

Signalling on low-voltage electrical installations in the frequency range 3 kHz to
148,5 kHz – Part 2-3: Immunity requirements for mains communications
equipment and systems operating in the range of frequencies 3 kHz to 95 kHz and
intended for use by electricity suppliers and distributors

EN 50065-4-1

Signalling on low-voltage electrical installations in the frequency range 3 kHz to
148,5 kHz – Part 4-1: Low voltage decoupling filters – Generic specification

EN 50065-4-2

Signalling on low-voltage electrical installations in the frequency range 3 kHz to
148,5 kHz – Part 4-2: Low voltage decoupling filters – Safety requirements


–5–

3


EN 50065-4-6:2004

Definitions

For the purposes of this document, the terms and definitions given in EN 50065-1, EN 50065-4-1 and
the following apply.
3.1
phase terminal (PT)
connection to a phase conductor of the electrical installation in which the phase coupler is used
3.2
neutral terminal (NT)
connection to a neutral conductor of the electrical installation in which the phase coupler is used (may
or may not be provided)
3.3
mains frequency leakage current
r.m.s. value of any mains frequency current flowing between phase terminals

4

Classification

The classification is made according to the “mains frequency leakage current” of the phase coupler.
The filter shall meet the requirements given in Part 4-2: Low voltage decoupling filters – Safety
requirements.

4.1

Type 1 (standard type)


The coupling may be achieved with suitable capacitors. Due to significant mains frequency leakage
current the use of this type of phase coupler may be limited for safety reasons.

4.2

Type 2 (low leakage type)

The coupling may be achieved using a transformer.

5
5.1

Requirements
Marking

In addition and in accordance with EN 50065-4-2, Clause 8,
−

the operating frequency range fmin to fmax shall be marked, and

−

the attenuation within the frequency range with a 10 Ώ load at the output port shall be marked.

5.2

Electrical characteristics at mains frequency

The filter shall meet the requirements given in Part 4-1: Low voltage decoupling filters – Generic
specification.



EN 50065-4-6:2004

5.2.1

–6–

Over voltage

The phase coupler shall meet the requirements in accordance with EN 50065-4-2, subclause 7.1.5:
−

overvoltage category III for phase couplers used on the consumer network;

−

overvoltage category IV for phase couplers used on the utility network.

5.2.2

Immunity

The phase coupler shall conform to the relevant specification:
−

according to EN 50065-2-1 for phase coupler in residential, commercial and light industrial
environments,

−


according to EN 50065-2-2 for phase coupler in industrial environments,

−

according to EN 50065-2-3 for phase coupler in the utility networks.

5.2.3

Mains frequency leakage current

The mains frequency leakage current, at the nominal voltage, is measured according to Figure 1.
All terminals of the phase coupler are connected to the appropriate voltage, except one phase terminal
that is connected to neutral through a gauge.
LL1

PT1
Phase coupler
PT2

230 V a.c.

A

PT3

NT

Figure 1 – Mains frequency leakage current test set up
NOTE 1 Repeat this measurement for all phase terminals provided by the phase coupler.

NOTE 2 For multiport/multiphase device, each phase port is tested independently.

The mains frequency leakage current of the phase coupler shall not exceed the following limits:
Table 1 – Mains frequency leakage current limits
Type of phase coupler

Mains frequency leakage current
(r.m.s. value)

Type 1

30 mA

Type 2

200 µA


–7–

5.3

EN 50065-4-6:2004

Electrical characteristics at signalling frequency

5.3.1

Operating frequency range


The operating frequency range shall be specified by the manufacturer within the relevant frequency
band:
−

3 kHz to 95 kHz for utility phase couplers,

−

95 kHz to 148,5 kHz for consumer phase couplers.

5.3.2

Transfer function

The maximum attenuation between phase terminals measured according to EN 50065-4-1
subclause 6.2 with 10 Ώ resistive load shall not exceed the value specified by the manufacturer.
5.3.3

Impedance

All active phase terminals are connected with a 10 Ώ resistive load. On one phase, the load is
disconnected and the impedance is measured. The modulus of this impedance shall not be less than
all resistors connected in parallel.


EN 50065-4-6:2004

–8–

Annex A

(normative)
Special national conditions
Special national condition: National characteristic or practice that cannot be changed even over a
long period, e.g. climatic conditions, electrical earthing conditions.
NOTE If it affects harmonization, it forms part of the European Standard.

For the countries in which the relevant special national conditions apply these provisions are
normative, for other countries they are informative.
Clause

Special national condition

5.2.3

Norway
Add a third note:
NOTE 3 The IT power distribution system is widely used, isolated from earth with a voltage limiter and the
neutral not distributed.

__________


blank


BS EN
50065-4-6:2004

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