IEC 62497-1:2010/AMD1:2013

Amendment 1 - Railway applications - Insulation coordination - Part 1: Basic requirements - Clearances and creepage distances for all electrical and electronic equipment

Amendement 1 - Applications ferroviaires - Coordination de l'isolement - Partie 1: Exigences fondamentales - Distances d'isolement dans l'air et lignes de fuite pour tout matériel électrique et électronique

General Information

• Status: Published
• Publication Date: 27-Mar-2013
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 45.060.01 - Railway rolling stock in general
• Technical Committee: TC 9 - Electrical equipment and systems for railways
• Drafting Committee: PT 62497 - TC 9/PT 62497
• Current Stage: PPUB - Publication issued
• Start Date: 15-Mar-2013
• Completion Date: 28-Mar-2013

Relations

• Amends: IEC 62497-1:2010 - Railway applications - Insulation coordination - Part 1: Basic requirements - Clearances and creepage distances for all electrical and electronic equipment
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62497-1 ®
Edition 1.0 2013-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Railway applications – Insulation coordination –
Part 1: Basic requirements – Clearances and creepage distances for all electrical
and electronic equipment
Applications ferroviaires – Coordination de l'isolement –
Partie 1: Exigences fondamentales – Distances d'isolement dans l'air et lignes
de fuite pour tout matériel électrique et électronique
IEC 62497-1:2010/A1:2013
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IEC 62497-1 ®
Edition 1.0 2013-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Railway applications – Insulation coordination –

Part 1: Basic requirements – Clearances and creepage distances for all

electrical and electronic equipment

Applications ferroviaires – Coordination de l'isolement –

Partie 1: Exigences fondamentales – Distances d'isolement dans l'air et lignes

de fuite pour tout matériel électrique et électronique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX J
ICS 45.060 ISBN 978-2-83220-643-0

– 2 – 62497-1 Amend.1 © IEC:2013
FOREWORD
This amendment has been prepared by IEC technical committee 9: Electrical equipment and
systems for railways.
The text of this amendment is based on the following documents:
FDIS Report on voting
9/1758/FDIS 9/1782/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 stability 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.
_____________
1 Scope
Delete from the first paragraph:
" up to 2 000 m above sea level"
2 Normative references
Add:
IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
5.1 General
Add the following new paragraph at the end of the subclause:
The clearances given in Table A.3 apply to altitudes up to 2 000 m above sea level. For
higher altitudes correction methods are given in 5.4.
5.2.1 Functional insulation
Add at the end of the first sentence:
, for altitudes higher than 2 000 m clearances shall be increased in accordance with 5.4.

62497-1 Amend.1 © IEC:2013 – 3 –
5.2.2 Basic and supplementary insulation
Add at the end of the first sentence:
, for altitudes higher than 2 000 m clearances shall be increased in accordance with 5.4.
Add the following new subclause 5.4:
5.4 Clearances for altitudes higher than 2 000 m
The clearances given in Table A.3 apply for use up to 2 000 m above sea level. For altitudes
higher than 2 000 m the clearances given in Table A.3 shall be increased.
For circuits with rated impulse voltage U up to and including 60 kV the clearances given in
Ni
Table A.3 shall be multiplied by the altitude correction factor k given in Table A.9.
d
For circuits with rated impulse voltage U higher than 60 kV the clearances given in Table
Ni
A.3 shall be multiplied by the altitude correction factor k given in Table A.10.
d
7.3.1 Method and values
nd
Replace the 2 paragraph by:
The test voltage shall be the value U given in Table A.8, based on a distance determined
i
according to Clause 5.
Depending on the atmospheric conditions and the altitude at the location of testing the
impulse test voltages U given in Table A.8 shall be corrected according to IEC 60664-1 for
i
circuits with rated impulse voltage U up to and including 60 kV and according to
Ni
IEC 60060-1 for circuits with rated impulse voltage U higher than 60 kV.
Ni
7.4.1 Method and values
st
Replace the 1 paragraph by:
The test shall be carried out in accordance with IEC 60060-1 or IEC 60664-1.
nd
Replace the 2 paragraph by:
The test voltage shall be the value U given in Table A.8, based on a distance determined
ac
according to Clause 5.
Depending on the atmospheric conditions and the altitude at the location of testing the test
voltages U given in Table A.8 shall be corrected according to IEC 60664-1 for circuits with
ac
rated impulse voltage U up to and including 60 kV and according to IEC 60060-1 for circuits
Ni
with rated impulse voltage U higher than 60 kV.
Ni
7.5.1 Method and values
st
Replace the 1 paragraph by:
The test voltage shall be the value U given in Table A.8, based on a distance determined
dc
according to Clause 5.
Depending on the atmospheric conditions and the altitude at the location of testing the test
voltages U given in Table A.8 shall be corrected according to IEC 60664-1 for circuits with
dc
– 4 – 62497-1 Amend.1 © IEC:2013
rated impulse voltage U up to and including 60 kV and according to IEC 60060-1 for circuits
Ni
with rated impulse voltage U higher than 60 kV.
Ni
8.3.1 Determination of U by method 1
Ni
Replace the subclause title by:
Determination of the rated impulse voltage U by method 1
Ni
Table A.2
Replace the last line in the table by the following two new lines:
a, d
30  125 170
b, d
30  170 200
Table A.3
Replace the title of the table by:
Table A.3 – Minimum clearances in air (in mm) for the standard
altitude ranges based on the rated impulse voltage U
Ni
Draw in Table A.3 a bold line between U 60 kV and U 75 kV as follows:
Ni Ni
…
50 75 91 101 106
60 90 110 120 125
75 120 135 145 150
95 160 175 180 185
…
Add to Note 5 of Table A.3:
5.1, 5.4
62497-1 Amend.1 © IEC:2013 – 5 –
Table A.8
Replace the title of the table by:
Table A.8 – Test voltages for verifying clearances at atmospheric and
altitude reference conditions, not to be used for routine dielectric tests
Add the following new Table A.9:
Table A.9 – Altitude correction factors for clearances in circuits with U up to and
Ni
including 60 kV when equipment is intended to be used above 2 000 m
Altitude (above sea level)
Altitude correction factor k
d
m
1,00
≤ 2 000
2 500 1,07
3 000 1,14
3 500 1,21
4 000 1,29
4 500 1,38
5 000 1,48
NOTE 1 For altitudes in between or above, linear interpolation is allowed.
NOTE 2 The altitude correction factors are determined in accordance with Table A.2 of IEC 60664-1:2007.
NOTE 3 This table is cited in 5.4.

Add the following new Table A.10:
Table A.10 – Altitude correction factors for clearances in circuits with U higher than
Ni
60 kV when equipment is intended to be used above 2 000 m
Altitude (above sea level)
Altitude correction factor k
d
m
2 000 1,000
2 500 1,145
3 000 1,217
3 500 1,294
4 000 1,376
4 500 1,465
5 000 1,555
NOTE 1 For altitudes in between or above, linear interpolation is allowed.
NOTE 2 The altitude correction factors above 2 000 m are determined in accordance with 4.2.2 of IEC 60071-2
based on an altitude of 1 400 m and exponent m = 1.
NOTE 3 This table is cited in 5.4.

B.2.1 General
Replace the penultimate paragraph by:

– 6 – 62497-1 Amend.1 © IEC:2013
The test shall be carried out
– for circuits with rated impulse voltage U up to and including 60 kV in accordance with
Ni
Clause 6 of IEC 60664-1:2007;
– for circuits with rated impulse voltage U higher than 60 kV in accordance with
Ni
IEC 60060-1.
Table B.1
Add new values 135 kV, 60 kV and 180 kV, 85 kV as follows:
Rated impulse voltage Test voltage
U U
Ni a
kV kV
0,33 0,2
0,5 0,3
0,8 0,42
1,5 0,7
2,5 1,2
3 1,4
3,5 1,6
4 1,9
4,5 2,0
5 2,3
6 2,8
8 3,6
10 4,6
12 5,5
15 6,9
18 8,3
20 9,2
25 11,5
30 14
35 17
40 18,5
50 23
60 27,5
75 34,5
95 44
125 50
135 60
145 70
170 80
180 85
200 95
250 95
325 140
62497-1 Amend.1 © IEC:2013 – 7 –
Figure F.1
Add, in Step 5 after "PD from Step 4", the following:
Table A.3
Interpolation permitted
Altitude within the standard range?
yes no
Correction as given in 5.4
Minimum clearance for basic insulation
distances designed or measured
smaller values are not allowed

as illustrated below:
– 8 – 62497-1 Amend.1 © IEC:2013
Step 1 3
Division of the electrical circuit into
sections which are to be handled separately
.
For all points of this section
Sections 1,2,3.
the same voltage stress applies
The complete circuit or only a single point
For each section
of the circuit may be defined as a section
the following steps are to be
performed
Step 2
Determination of rated insulation voltage The section is powered direct by a
for the section of the circuit  standardised railway voltage U
n
U
Nm
yes no
Fixed installations:
Rolling stock:
Manufacturer’s determination
determination according
Table D.1
according to 3.4.4 and Table A.1
to 4.1.2
Rated insulation voltage
for the section of the circuit
U
Nm
Step 3 Selection of insulation type The section includes live parts.
According to 3.6 for the section The insulation provides a basic protection
Product standards may state a preselection against electric shock
Insulation between conductive parts
In case of insulation failure,
only for proper functioning the danger of an electric shock is given
no yes yes
Basic
Functional Basic insulation
insulation insulation
+
Supplementary
insulation
(may be solid insulation)
=
Reinforced insulation
Double insulation
(as a single insulation
Basic + Suppl.
system)
Step 4
Pollution degree
Choice pollution degree Signalling
of PD1.PD4A
for the section of the circuit 8.2
Table A.4 + Annex E
Pollution degree
Rolling stock
PD1.PD4
8.3
Pollution degree
Fixed installation
PD1.PD4B
8.4
IEC  037/10
Figure F.1 – Determination of minimum c
...