SIST EN 50065-4-4:2004

Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz -- Part 4-4: Low voltage decoupling filter - Impedance filter

This standard applies to impedance filters 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 standard also applies to "plug-in filters".
These filters (see Figure 1) are used to set a suitable impedance, in the nominal frequency range of the mains signalling system, at any point of the low voltage mains network where a low impedance equipment is connected, in order to allow reliable operation of mains signalling system.
These impedance filters can be used either in utility or consumer networks. They may also be used in conjunction with incoming filters and segmentation filters.

Signalübertragung auf elektrischen Niederspannungsnetzen im Frequenzbereich 3 kHz bis 148,5 kHz -- Teil 4-4: Niederspannungs-Entkopplungsfilter - Impedanzfilter

Diese Norm gilt für Impedanzfilter in einem System zur Signalübertragung auf elektrischen Niederspannungsnetzen, dered Spannung zwischen Phase und Neutralleiter 250 V ~ nicht überschreitet und deren Nennstrom 125 A nicht überschreiter und die für die Verwendung im Haushalt oder vergleichbaren ortsfesten Installationen vorgesehen sind, einschließlich Wohn- und Gewerbebauten. Diese Norm gilt ebenso für Zwischenstecker-Filter.
Solche Filter (siehe Bild 1) werden verwendet um in dem Nenn-Frequenzbereich eines Informationsübertragungssystems eine geeignete Impedanz an Punkten des elektrischen Neiderspannungsnetzes zu erzielen, an denen ein niederohmiges Gerät angeschlossen ist. Dadurch soll ein zuverlässiger Betrieb des Informationensübertragungssystems sichergestellt werden.
Die Filter können sowohl im Niederspannungsnetz des Energieversorgers als auch verbraucherseitig eingesetzt werden. Sie können auch in Verbindung mit Eingangsfiltern und Trennfiltern verwendet werden.

Transmission de signaux sur les réseaux électriques basse tension dans la bande de fréquences de 3 kHz à 148,5 kHz -- Partie 4-4: Filtres basse tension de découplage - Filtre d'impédance

Cette norme s’applique aux filtres d’impédance dans un système de communication sur le réseau électrique ayant une tension entre phase et neutre qui ne dépasse pas 250 V en courant alternatif et un courant nominal ne dépassant pas 125 A, destinés à des installations fixes domestiques et analogues, y compris les bâtiments résidentiels, commerciaux et de l'industrie légère. Cette norme s’applique également aux filtres "enfichables".
Ces filtres (voir Figure 1) sont utilisés pour obtenir l’impédance souhaitée, dans la gamme de fréquences nominale du système de communication sur le réseau électrique, en tout point du réseau où un équipement à faible impédance est connecté, de façon à permettre un fonctionnement fiable du système de communication sur le réseau électrique.
Ces filtres d’impédance peuvent être utilisés aussi bien dans les réseaux des distributeurs d’énergie que dans ceux des consommateurs. Ils peuvent aussi être utilisés associés à des filtres de branchement et des filtres de segmentation.

Signalizacija po nizkonapetostnih električnih napeljavah v frekvenčnem območju od 3 kHz do 148,5 kHz – 4-4. del: Nizkonapetostni ločilni filtri – Impedančni filter

General Information

• Status: Published
• Publication Date: 29-Feb-2004
• ICS: 31.160 - Electric filters
• ICS: 33.040.30 - Switching and signalling systems
• Technical Committee: KIN - Mains communicating systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Mar-2004
• Due Date: 01-Mar-2004
• Completion Date: 01-Mar-2004
• Ref Project: EN 50065-4-4:2003 - Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz - Part 4-4: Low voltage decoupling filter - Impedance filter

Relations

• Revised: SIST EN 50065-4-4:2023 - Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz Part 4-4: Low voltage decoupling filter - Impedance filter
• Effective Date: 14-May-2019

Overview

SIST EN 50065-4-4:2004 is a European standard developed by CLC that specifies requirements for impedance filters used in low-voltage electrical installations. These low voltage decoupling filters operate within the frequency range of 3 kHz to 148.5 kHz and are essential components in mains communication systems. Designed primarily for phase to neutral voltages not exceeding 250 V a.c. and nominal currents up to 125 A, this standard targets household and similar fixed installations. This includes residential, commercial, and light industrial buildings.

Impedance filters defined by this standard are critical for ensuring reliable communication signals over low-voltage mains networks by providing suitable impedance at connection points, particularly where low impedance equipment is present. Both utility and consumer network applications are covered, allowing use in a wide variety of electrical distribution environments.

Key Topics

• Scope and Applications
  Applies to impedance filters in mains communication systems for low-voltage installations with nominal voltages up to 250 V a.c. and currents up to 125 A. Suitable for residential, commercial, and light industrial installations. Also covers "plug-in filters" used to maintain impedance consistency.

• Electrical Characteristics

  • Compliance with generic specifications and safety requirements found in related parts EN 50065-4-1 and EN 50065-4-2
  • Overvoltage withstand capability classified as Category III for consumer networks and Category IV for utility networks
  • Electromagnetic compatibility (EMC) requirements matching respective EN 50065-2-x standards for consumer and utility environments

• Impedance and Frequency Range

  • Designed to operate in the frequency range of 3 kHz to 95 kHz for utility networks and 95 kHz to 148.5 kHz for consumer networks
  • Minimum impedance modulus of 10 Ω at the network port within the operating frequency range
  • No impedance set requirements at the equipment port, enabling optimal function for different equipment types

• Filter Configuration

  • Two essential ports: network port connected to the mains communication network and equipment port connected to low impedance equipment or network
  • Symmetrical design allowed where distinction between ports is not necessary
  • Compatibility with incoming filters and segmentation filters to support system segmentation and noise reduction

• Safety and Compliance

  • Meets safety and EMC requirements as per related EN 50065 series parts
  • Designed to operate safely in controlled low-voltage environments without compromising network communication

Applications

SIST EN 50065-4-4:2004 impedance filters are integral to mains communication systems in buildings and facility installations, enabling technologies such as:

• Power line communication (PLC) systems for smart metering and home automation
• Signal transmission over existing electrical wiring without interference from low impedance loads
• Segmentation of electrical networks to improve signal quality in complex installations
• Integration into both utility and consumer electrical distribution systems for seamless communication
• Use in plug-in filter devices to enhance existing infrastructure without extensive rewiring

These filters ensure reliable signalling by providing consistent impedance behavior, thus enabling stable communication required for modern electronic systems in residential and light industrial settings.

Related Standards

SIST EN 50065-4-4:2004 is part of the broader EN 50065 series concerning signalling on low-voltage electrical installations. Closely related standards include:

• EN 50065-1: General requirements, frequency bands, and electromagnetic disturbances
• EN 50065-2-1 to 2-3: Immunity requirements for mains communication equipment in various environments (residential, industrial, utility)
• EN 50065-4-1: Generic specifications for low voltage decoupling filters
• EN 50065-4-2: Safety requirements for low voltage decoupling filters
• EN 50065-4-3: Specifications for incoming filters used in utility side networks
• EN 50065-4-5: Segmentation filters for electrical network signalling
• EN 50065-4-6: Phase couplers for network phase bridging

Adhering to these complementary standards ensures a comprehensive, interoperable approach to low voltage mains signalling and communication quality.

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SIST EN 50065-4-4:2004 plays a vital role in establishing reliable low-voltage mains communication by standardizing impedance filter performance, safety, and compatibility. Its application facilitates robust power line communication solutions across residential, commercial, and light industrial electrical networks.

Standards Content (Sample)

STANDARDSignalizacija po nizkonapetostnih električnih napeljavah v frekvenčnem območju od 3 kHz do 148,5 kHz – 4-4. del: Nizkonapetostni ločilni filtri – Impedančni filterSignalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz - Part 4-4: Low voltage decoupling filter - Impedance filter©
Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljenoReferenčna številkaSIST EN 50065-4-4:2004(en)ICS31.160; 33.040.30

EUROPEAN STANDARD
EN 50065-4-4 NORME EUROPÉENNE EUROPÄISCHE NORM
January 2003 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
© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50065-4-4:2003 E
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 4-4: Low voltage decoupling filter -
Impedance filter
Transmission de signaux sur les réseaux électriques basse tension dans la bande de fréquences de 3 kHz à 148,5 kHz Partie 4-4: Filtres basse tension
de découplage -
Filtre d'impédance
Signalübertragung auf elektrischen Niederspannungsnetzen im Frequenzbereich 3 kHz bis 148,5 kHz Teil 4-4: Niederspannungs-Entkopplungsfilter -
Impedanzfilter
This European Standard was approved by CENELEC on 2002-04-01. 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, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

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 50065-4-4 on 2002-04-01. 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) 2003-08-01
- latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-04-01 EN 50065 consists of the following 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 7 Equipment impedance __________

- 3 - EN 50065-4-4:2003
Contents Page 1 Scope.4 2 Normative references.4 3 Impedance filter electrical characteristics.5 3.1 Overvoltage.5 3.2 EMC .5 4 Filter impedance characteristics.5 4.1 Terminations.5 4.2 Operating frequency range.5 4.3 Impedance.
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