IEC 61643-21:2000/AMD1:2008
(Amendment)Amendment 1 - Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods
Amendment 1 - Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods
Amendement 1 - Parafoudres basse tension - Partie 21: Parafoudres connectés aux réseaux de signaux et de télécommunications - Prescriptions de fonctionnement et méthodes d'essais
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IEC 61643-21
Edition 1.0 2008-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low voltage surge protective devices –
Part 21: Surge protective devices connected to telecommunications and
signalling networks – Performance requirements and testing methods
Parafoudres basse tension –
Partie 21: Parafoudres connectés aux réseaux de signaux et de
télécommunications – Prescriptions de fonctionnement et méthodes d’essais
IEC 61643-21 A1:2008
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IEC 61643-21
Edition 1.0 2008-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low voltage surge protective devices –
Part 21: Surge protective devices connected to telecommunications and
signalling networks – Performance requirements and testing methods
Parafoudres basse tension –
Partie 21: Parafoudres connectés aux réseaux de signaux et de
télécommunications – Prescriptions de fonctionnement et méthodes d’essais
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
S
CODE PRIX
ICS 29.240; 29.240.10 ISBN 2-8318-9731-9
– 2 – 61643-21 Amend. 1 © IEC:2008
FOREWORD
This amendment has been prepared by subcommittee 37A: Low-voltage surge protective
devices, of IEC technical committee 37: Surge arresters.
The text of this amendment is based on the following documents:
FDIS Report on voting
37A/200/FDIS 37A/201/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
61643-21 Amend. 1 © IEC:2008 – 3 –
Page 3
CONTENTS
Delete, on page 5, the title of Annexes B and C, and replace each by “Void”.
Add the following new Annexes D and E:
Annex D (informative) Measurement accuracy .17
Annex E (informative) Determination of let-through current (I ) .18
p
Page 9
FOREWORD
Delete the references to the annexes.
Page 15
Replace the existing Figures 1a, 1b, 1c, 1d, 1e and 1f with the following new figures:
X1
SPD
(V)
X2
IEC 549/08
Figure 1a – Two-terminal SPD
X1
SPD
SPD
X1
Y1
C
(V, I)
(V)
C X2
IEC 550/08
IEC 551/08
Figure 1b – Three-terminal SPD Figure 1c – Three-terminal SPD
X1 Y1
SPD
(V, I)
X2 Y2
X1 Y1
SPD
(V, I)
Y2
X2
C
IEC 552/08
IEC 553/08
Figure 1d – Four-terminal SPD Figure 1e – Five-terminal SPD
– 4 – 61643-21 Amend. 1 © IEC:2008
Y1
X1
X2
Y2
SPD
(V, I )
Yn
Xn
a
C
IEC 554/08
a
The common terminal C may not be provided.
Figure 1f – Multi-terminal SPD
61643-21 Amend. 1 © IEC:2008 – 5 –
Page 17
1.3 Use of this standard
Replace the existing fifth paragraph by the following:
Subclause 5.2.3 provides transmission tests that SPDs may need to conform to, depending on
their communication and signalling application. Selection of the applicable transmission tests
from 5.2.3 shall be made, based on the intended application of the SPDs. Table 1 provides
general guidance on how to select the applicable transmission tests.
Delete the last line of this subclause.
Replace, on page 19, the existing Table 1 with the following new Table 1:
Table 1 – General SPD requirements
Test Sub-
4 Requirement – Test Type of SPD
series clause
1 General test 6.1
Identification and
documentation 6.1.1 A A A A A A
Marking 6.1.2 A A A A A A
Transmission tests 6.2.3
Capacitance 6.2.3.1 A O O O A O
Insertion loss 6.2.3.2 O A A A O A
Return loss 6.2.3.3 O O O A O O
Longitudinal balance 6.2.3.4 O O O A O O
Bit Error Ratio (BER) 6.2.3.5 O O O O O O
Near-end crosstalk (NEXT) 6.2.3.6 O O O A O O
Mechanical tests 6.3
Terminals and connectors 6.3.1 A A A A A A
General testing procedure 6.3.1.1 A A A A A A
Terminals with screws 6.3.1.2 A A A A A A
Screwless terminals 6.3.1.3 A A A A A A
Insulating pierced
connections 6.3.1.4 A A A A A A
Pull-out-test on SPD
terminals designed for
single-core conductors 6.3.1.4.1A A A A A A
Pull-out-test on SPD
terminals designed for multi-
core cables and cords 6.3.1.4.2 A A A A A A
Mechanical strength
(mounting) 6.3.2 A A A A A A
SPD with only voltage-
limiting function
SPD with both voltage-
limiting and current-
limiting functions
SPD with voltage-
limiting function and
linear component
between its terminals
SPD having both
voltage-limiting and
current-limiting
functions with enhanced
transmission
capabilities
SPD having only
voltage-limiting function
but intended for use in
extended range
environment
SPD having both
voltage-limiting and
current-limiting
functions but intends for
use in extended range
environment
– 6 – 61643-21 Amend. 1 © IEC:2008
Table 1 (continued)
Test Sub-
4 Requirement – Test Type of SPD
series clause
Resistance to ingress of
solid objects and to harmful
ingress of water 6.3.3 A A A A A A
Protection against direct
contact 6.3.4 A A A A A A
Fire resistance 6.3.5 A A A A A A
Environmental tests
6.4
High temperature and
humidity endurance 6.4.1 O O O O A A
Environmental cycling with
impulse surges 6.4.2 O O O O A A
Environmental cycling with
a.c. surges 6.4.3 O O O O A A
2 Voltage limiting tests 6.2.1
Maximum continuous
operating voltage (Uc) 6.2.1.1 A A A A A A
Insulation resistance 6.2.1.2 A A A A A A
Impulse durability for
voltage limiting function 6.2.1.6 A A A A A A
Impulse-limiting voltage 6.2.1.3 A A A A A A
Impulse reset switching
types 6.2.1.4A A A A A A
AC durability for voltage
limiting function
6.2.1.5 O O O O O O
Blind spot test multi stage
SPD 6.2.1.8 A A A A A A
Overstressed fault mode 6.2.1.7 A A A A A A
3 Current limiting tests 6.2.2
Rated current 6.2.2.1 N.A. A A A N.A. A
Series resistance 6.2.2.2 N.A. A A A N.A. A
A
Current response time 6.2.2.3 N.A. A N.A. A N.A.
A
Current reset time 6.2.2.4 N.A. A N.A. A N.A.
Maximum interrupting A
voltage 6.2.2.5N.A. A N.A. A N.A.
A
Operating duty test 6.2.2.6 N.A. A N.A. A N.A.
AC durability for current A
1 3
limiting function 6.2.2.7N.A. A N.A. A N.A.
Impulse durability for A
1 3
current limiting function 6.2.2.8 N.A. A N.A. A N.A.
Acceptance tests
4 6.5 O O O O O O
A Applicable.
N.A. Not applicable.
O Optional.
For each category of test impulse a new set of samples can be used.
It is admissible to measure the impulse-limiting voltage 6.2.1.3 while testing impulse durability 4.2.1.6.
Test not applicable if there is a linear component between its terminals.
Each test series is carried out on three samples.
SPD with only voltage-
limiting function
SPD with both voltage-
limiting and current-
limiting functions
SPD with voltage-
limiting function and
linear component
between its terminals
SPD having both
voltage-limiting and
current-limiting
functions with enhanced
transmission
capabilities
SPD having only
voltage-limiting function
but intended for use in
extended range
environment
SPD having both
voltage-limiting and
current-limiting
functions but intends for
use in extended range
environment
61643-21 Amend. 1 © IEC:2008 – 7 –
2 Normative references
Add the following new references:
IEC 61643-22:2004, Low-voltage surge protective devices – Part 22: Surge protection devices
connected to telecommunications and signalling networks – Selection and application
principles
ITU-T Recommendation K.55:2002, Overvoltage and overcurrent requirements for insulation
displacement connectors (IDC) terminations
ITU-T Recommendation K.65:2004, Overvoltage and overcurrent requirements for termination
modules with contacts for test ports or SPDs
ITU-T Recommendation O.9:1999, Measuring arrangements to assess the degree of
unbalance about earth
Delete, on page 21, the dates from the following references:
IEC 60529, IEC 61000-4-5, IEC 61083-1 and IEC 61643-1.
Delete the following reference:
ITU-T Recommendation K.17:1988, Tests on power-fed repeaters using solid-state devices in
order to check the arrangements for protection from external interference
3 Definitions
Replace, the existing definitions 3.8, 3.10, 3.14, 3.15 and 3.22 by the following new
definitions:
3.8
surge protective device
SPD
device that restricts the voltage of a designated port or ports, caused by a surge, when it
exceeds a predetermined level
NOTE 1 Secondary functions may be incorporated, such as a current-limiting to restrict a terminal current.
NOTE 2 Typically the protective circuit has at least one non-linear voltage-limiting surge protective component.
NOTE 3 An SPD is a complete assembly, having terminals to connect to the circuit conductors.
3.10
current limiting
action of an SPD, containing at least one non-linear current-limiting component, that causes
currents exceeding a predetermined value to be restricted
3.14
voltage clamping type SPD
SPD that has high shunt impedance and will have a continuous reduction in impedance with
increasing current in response to a voltage surge exceeding the threshold level of the SPD
NOTE Examples of components used in voltage clamping type SPDs: varistors (e.g. MOV) and avalanche
breakdown diodes (ABD).
3.15
voltage switching type SPD
SPD that has a high shunt impedance and will have a sudden and large reduction in
impedance in response to a voltage surge exceeding the threshold level of the SPD
NOTE Examples of compon
...
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