CLC/TS 61643-22:2006

Low-voltage surge protective devices - Part 22: Surge protective devices connected to telecommunications and signalling networks - Selection and application principles

Describes the principles for the selection, operation, location and coordination of SPDs connected to telecommunication and signalling networks with nominal system voltages up to 1 000 V r.m.s. a.c. and 1 500 V d.c. Also addresses SPDs that incorporate protection for signalling lines and power lines in the same enclosure.

Überspannungsschutzgeräte für Niederspannung - Teil 22: Überspannungsschutzgeräte für den Einsatz in Telekommunikations- und signalverarbeitenden Netzwerken - Auswahl- und Anwendungsprinzipien

Parafoudres basse tension - Partie 22: Parafoudres connectés aux réseaux de signaux et de télécommunications - Principes de choix et d'application

Décrit les principes à utiliser pour le choix, le fonctionnement, la localisation et la coordination des parafoudres connectés aux réseaux de télécommunications et de transmission de signaux sous une tension nominale de réseau jusqu'à 1 000 V efficace en courant alternatif et 1 500 V en courant continu. Aussi les parafoudres qui incorporent la protection pour les lignes de transmission de signaux et les lignes de puissance dans la même enveloppe.

Nizkonapetostne naprave za zaščito pred prenapetostnimi udari - 22. del: Naprave, priključene na telekomunikacijska in signalna omrežja – Izbira in načela za uporabo (IEC 61643-12:2004, spremenjen)

General Information

• Status: Withdrawn
• Publication Date: 11-Apr-2006
• ICS: 29.240 - Power transmission and distribution networks
• ICS: 29.240.10 - Substations. Surge arresters
• Technical Committee: CLC/TC 37A - Low voltage surge protective devices
• Drafting Committee: IEC/SC 37A - IEC_SC_37A
• Parallel Committee: IEC/SC 37A - IEC_SC_37A
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 18-Mar-2016
• Ref Project: SIST-TS CLC/TS 61643-22:2007 - Low-voltage surge protective devices -- Part 22: Surge protective devices connected to telecommunications and signalling networks - Selection and application principles

Relations

• Replaced By: CLC/TS 61643-22:2016 - Low-voltage surge protective devices - Part 22: Surge protective devices connected to telecommunications and signalling networks - Selection and application principles
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2007
1L]NRQDSHWRVWQHQDSUDYH]D]DãþLWRSUHGSUHQDSHWRVWQLPLXGDULGHO1DSUDYH
SULNOMXþHQHQDWHOHNRPXQLNDFLMVNDLQVLJQDOQDRPUHåMD±,]ELUDLQQDþHOD]D
XSRUDER,(&VSUHPHQMHQ
Low-voltage surge protective devices -- Part 22: Surge protective devices connected to
telecommunications and signalling networks - Selection and application principles
berspannungsschutzgerte fr Niederspannung -- Teil 22: berspannungsschutzgerte fr den
Einsatz in Telekommunikations- und signalverarbeitenden Netzwerken - Auswahl- und
Anwendungsprinzipien
Parafoudres basse tension -- Partie 22: Parafoudres connects aux rseaux de signaux et
de tlcommunications - Principes de choix et d'application
Ta slovenski standard je istoveten z: CLC/TS 61643-22:2006
ICS:
29.120.50 9DURYDONHLQGUXJD Fuses and other overcurrent
PHGWRNRYQD]DãþLWD protection devices
29.240.10 Transformatorske postaje. Substations. Surge arresters
Prenapetostni odvodniki
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION
CLC/TS 61643-22
SPÉCIFICATION TECHNIQUE
April 2006
TECHNISCHE SPEZIFIKATION
ICS 29.240; 29.240.10
English version
Low-voltage surge protective devices
Part 22: Surge protective devices connected to telecommunications
and signalling networks -
Selection and application principles
(IEC 61643-22:2004, modified)
Parafoudres basse tension Überspannungsschutzgeräte
Partie 22: Parafoudres connectés für Niederspannung
aux réseaux de signaux Teil 22: Überspannungsschutzgeräte
et de télécommunications - für den Einsatz in Telekommunikations-
Principes de choix et d'application und signalverarbeitenden Netzwerken -
(CEI 61643-22:2004, modifiée) Auswahl- und Anwendungsprinzipien
(IEC 61643-22:2004, modifiziert)

This Technical Specification was approved by CENELEC on 2005-09-10.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to
make the TS available promptly at national level in an appropriate form. It is permissible to keep conflicting
national standards in force.
CENELEC members are the national electrotechnical committees of Austria, Belgium, 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

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TS 61643-22:2006 E

Foreword
The text of the International Standard IEC 61643-22:2004, prepared by SC 37A, Low-voltage surge
protective devices, of IEC TC 37, Surge arresters, together with common modifications prepared by the
Technical Committee CENELEC TC 37A, Low voltage surge protective devices, was submitted to the formal
vote and was approved by CENELEC as CLC/TS 61643-22 on 2005-09-10.
The following date was fixed:
– latest date by which the existence of the CLC/TS
has to be announced at national level (doa) 2006-07-01
__________
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Contents
Introduction.6
1 Scope.7
2 Normative references.7
3 Terms and definitions.7
4 Description of technologies.8
4.1 Voltage-limiting devices .8
4.1.1 Clamping-type .8
4.1.2 Switching-type.8
4.2 Current-limiting devices .8
4.2.1 Current-interrupting type.8
4.2.2 Current-reducing type.9
4.2.3 Current-diverting type.9
5 Parameters for selection of SPDs and appropriate tests from EN 61643-21 .9
5.1 Controlled and uncontrolled environments .9
5.1.1 Controlled environments.9
5.1.2 Uncontrolled environments.9
5.2 SPD parameters that may affect normal system operation .10
6 Risk management.10
6.1 Risk analysis .11
6.2 Risk identification .11
6.3 Risk treatment.11
7 Application of SPDs.13
7.1 General.13
7.2 Coupling mechanisms.13
7.3 Application, selection and installation of surge protective devices (SPDs) .15
7.3.1 Application requirements for SPDs .15
7.3.2 SPD installation cabling considerations.20
8 Multiservice surge protective devices .23
9 Coordination of SPDs/ITE .23
Annex A (informative) Voltage-limiting devices.25
A.1 Voltage-clamping devices .25
A.1.1 Metal oxide varistor (MOV) .25
A.1.2 Silicon semiconductors .25
A.2 Voltage-switching devices.27
A.2.1 Gas discharge tube (GDT).27
A.2.2 Air gaps.27
A.2.3 Thyristor surge suppressor (TSS) – Fixed voltage types (self-gating) .28
A.2.4 Thyristor surge suppressor (TSS) – Gated types .28

Annex B (informative) Current-limiting devices.29
B.1 Current-interrupting devices.29
B.1.1 Fusible resistor.29
B.1.2 Fuses.30
B.1.3 Thermal fuses .30
B.2 Current-reducing devices.30
B.2.1 Polymer PTC (positive temperature coefficient resistor) .31
B.2.2 Ceramic PTC.31
B.2.3 Electronic current limiters.31
B.3 Current-diverting devices.31
B.3.1 Heat coils.32
B.3.2 Gated thyristor, current operated .32
B.3.3 Thermal switch .33
Annex C (informative) Risk management.34
C.1 Risk due to lightning discharges .34
C.1.1 Risk assessment.34
C.1.2 Risk analysis.34
C.1.3 Risk evaluation.35
C.1.4 Risk treatment.36
C.2 Risk due to power line faults.36
C.2.1 AC power systems .36
C.2.2 DC power systems.37
C.3 Earth potential rise.37
Annex D (informative) Transmission characteristics related to IT systems.38
D.1 Telecommunications systems.38
D.2 Signalling, measurement and control systems .39
D.3 Cable TV systems.39
Annex E (informative) Coordination of SPDs/ITE .40
E.1 Determination of UIN and IIN.40
E.2 Determine the output protective voltage and current waveforms for SPD 1.40
E.3 Compare SPD 1 and SPD 2 values.41
E.4 Necessity of verification of the coordination by testing.42

Figure 1 – SPD installation in telecommunications and signalling networks. 12
Figure 2 – Coupling mechanisms . 14
Figure 3 – Example of a configuration of the lightning protection concept . 16
Figure 4 – Example of a configuration according to the zones(Figure 2). 18
Figure 5 – Example of protecting measures against common-mode voltages and
differential mode voltages of the data (f) and supply voltage input (g) of an ITE . 19
Figure 6 – Influence of the voltages U and U on the protection level U
L1 L2 P
caused by the inductance of the leads . 20

- 5 - CLC/TS 61643-22:2006
Figure 7 – Removal of the voltages U and U from the protector unit
L1 L2
by connecting leads to a common point. . 21
Figure 8 – Necessary installation conditions of a three, five or multi-terminal SPD
with an ITE for minimizing the interference influences on the protection level . 22
Figure 9 – Coordination of two SPDs . 23
Figure A.1 – Circuit for voltage-clamping devices . 25
Figure A.2 – Circuit for voltage-switching devices . 27
Figure B.1 – Circuit for interrupting devices . 29
Figure B.2 – Circuit for current-reducing devices .
...