IEC 62271-100:2021/AMD1:2024

IEC 62271-100 ®
Edition 3.0 2024-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
High-voltage switchgear and controlgear –
Part 100: Alternating-current circuit-breakers

Appareillage à haute tension –
Partie 100: Disjoncteurs à courant alternatif
IEC 62271-100:2021-07/AMD1:2024-08(en-fr)

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IEC 62271-100 ®
Edition 3.0 2024-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
High-voltage switchgear and controlgear –

Part 100: Alternating-current circuit-breakers

Appareillage à haute tension –

Partie 100: Disjoncteurs à courant alternatif

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.10  ISBN 978-2-8322-9543-4

– 2 – IEC 62271-100:2021/AMD1:2024
© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 100: Alternating current circuit-breakers

AMENDMENT 1
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to IEC 62271-100:2021 has been prepared by subcommittee 17A: Switching
devices, of IEC technical committee 17: High-voltage switchgear and controlgear.
The text of this Amendment is based on the following documents:
Draft Report on voting
17A/1406/FDIS 17A/1410/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.

© IEC 2024
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications/.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
___________
INTRODUCTION to Amendment 1
This amendment includes the following significant changes:
In IEC 62271-100:2021 there is a slight difference for the calculation of u for T10 in Table 20
c
and Table 21. The u value for T10 shall be the same for k 1,3 and k 1,5 because both
c pp pp
conditions also cover transformer limited faults. For voltage ratings higher than 170 kV u also
c
covers cases of three-phase line faults with effectively earthed neutral systems. See also the
from 1,76 to 1,765 the u values are
notes in Table 20 and Table 21. By increasing the k
af c
practically the same again for k 1,3 and k 1,5.
pp pp
Furthermore:
– The definition of terminal fault has been updated.
– The description of the time parameters for the rated operated sequence has been updated
(the parameters remained the same).
– Rated voltages 15,5; 27 and 40,5 kV added to Table 1.
– Additional criteria for dielectric test added.
– It has been made explicit that partial discharge test only is applicable to GIS and dead-tank
circuit-breakers.
– Voltage test as condition check as per 7.2.12.103 added to 7.2.12.101.
– The t for T60 are corrected to the t values of T100.
2 2
– TRV values in Table 16, Table 17, Table 18, Table 19, Table 20, Table 22, Table 23, Table
24, Table 25, Table 30 and Table F.1 have been recalculated and updated.
– Requirement on having inrush making current in the same phase as minimum arcing times
during three-phase back-to-back capacitor bank current tests.
– Requirement to perform mechanical operating tests on all releases added.
– Existing tolerance for single-phase and double-earth fault added to Table B.1.
– Tolerance for breaking current L updated in Table B.1.
– 4 – IEC 62271-100:2021/AMD1:2024
© IEC 2024
3.5.130
alternative operating mechanism
Replace the existing definition (but not the note to entry) with the following new definition:
change in the power kinematic chain of the original operating mechanism or use of a different
operating mechanism which retains the same mechanical characteristics
3.7.112
terminal fault
Replace the existing definition (but not the note to entry) with the following new definition :
short-circuit on at least one of the terminals of the circuit-breaker

5.104 rated operating sequence
Replace the existing text with the following new text:
The rated operating sequence is O – t – CO – t' – CO, where
O represents an opening operation;
CO represents a close-open operating cycle with the shortest possible close-open time
such that the circuit-breaker reaches the fully closed and latched position prior to
opening.
The time parameters are as follows:
– circuit-breaker for auto-reclosing: t = 3 min and t'= 3 min (alternative values for t and t' may
be used, for example 15 s or 1 min);
– circuit-breaker for rapid auto-reclosing: t = 0,3 s and t' = 3 min (alternative values for t' may
be used, for example 15 s or 1 min);

– circuit-breaker not for auto-reclosing: t > 3 min and t' > 3 min (values for t and t' to be
specified by the manufacturer).

© IEC 2024
Table 1 – Preferred values of rated capacitive currents
Replace the existing Table 1 with the following new table:
Table 1 – Preferred values of rated capacitive currents
Single capacitor
Line Cable Back-to-back capacitor bank
bank
Rated line- Rated cable- Rated single Rated back-to- Rated back-to-
Rated charging charging capacitor bank back capacitor back capacitor
voltage breaking breaking breaking bank breaking bank inrush
current current current current making current
U I I I I I
r l c sb bb bi
kV A A A A kA
3,6 10 10 400 400 20
4,76 10 10 400 400 20
7,2 10 10 400 400 20
8,25 10 10 400 400 20
12 10 25 400 400 20
15 10 25 400 400 20
15,5 10 25 400 400 20
17,5 10 31,5 400 400 20
24 10 31,5 400 400 20
25,8 10 31,5 400 400 20
27 10 31,5 400 400 20
36 10 50 400 400 20
38 10 50 400 400 20
40,5 10 50 400 400 20
48,3 10 80 400 400 20
52 10 80 400 400 20
72,5 10 125 400 400 20
100 20 125 400 400 20
123 31,5 140 400 400 20
145 50 160 400 400 20
170 63 160 400 400 20
245 125 250 400 400 20
300 200 315 400 400 20
362 315 355 400 400 20
420 400 400 400 400 20
550 500 500 400 400 20
800 900 - - - -
1 100 1 200 - - - -
1 200 1 300 - - - -
NOTE 1 The values given in this table are chosen for standardization purposes. They are preferred values and
cover the majority of typical applications. If different values are applicable, any appropriate value can be specified
as rated value.
NOTE 2 For actual cases, the inrush currents can be calculated based on IEC TR 62271-306 [4].
NOTE 3 The peak of the inrush current can be higher or lower than the preferred values stated in this table
depending on system conditions, for example whether or not current limiting reactors are used.
NOTE 4 Preferred values for rated voltages 1 100 kV and 1 200 kV are based on applications at 50 Hz. Higher
values of current could be possible in the future in systems operated at 60 Hz, however experience shows that
these higher currents would not lead to a higher stress for the circuit-breaker as the recovery voltage is generally
the dominant factor for breaking.

– 6 – IEC 62271-100:2021/AMD1:2024
© IEC 2024
7.2.5 Criteria to pass the test
Replace the existing text with the following new text:
Subclause 7.2.5 of IEC 62271-1:2017 is applicable with the following addition:
If disruptive discharges occur and evidence cannot be given during testing that the disruptive
discharges were on self-restoring insulation, the circuit-breaker shall be dismantled and
inspected after the completion of the dielectric test series. If damage (for example tracking,
puncture, etc.) to non-self-restoring insulation is observed, the circuit-breaker has failed the
test.
For metal-enclosed circuit-breakers tested with test bushings that are not part of the circuit-
breaker, disruptive discharges across the test bushings can be disregarded.

7.2.10 Partial discharge tests
Replace the existing text with the following new text:
Subclause 7.2.10 of IEC 62271-1:2017 is applicable with the following addition:
This test is only applicable to GIS and dead-tank circuit-breakers.
Normally it is not required to perform partial discharge tests on a complete circuit-breaker.
However, in case of dead-tank and GIS circuit-breakers using components for which a relevant
IEC standard exists that requires partial discharge measurements (for example, bushings, see
IEC 60137 [8]), evidence shall be provided by the manufacturer showing that those components
have passed the partial discharge tests as required by the relevant IEC standard.

7.2.12.101 Condition after mechanical or environmental test
Replace the existing text with the following new text:
Where after mechanical or environmental tests (see 7.101.1.4) the insulating properties across
open contacts of a circuit-breaker cannot be verified by visual inspection with sufficient
reliability, a voltage test as condition check in dry condition across the open circuit-breaker
according to 7.2.12 of IEC 62271-1:2017 or 7.2.12.103 of this document shall be applied. For
metal enclosed circuit-breakers test conditions refer to Table 7. For multi-unit live tank circuit-
breakers with identical units according to 7.102.4.2.3 the voltage test as a condition check may
be performed as unit test.
© IEC 2024
7.101.1.3 Characteristics and settings of the circuit-breaker to be recorded before and
after the tests
Replace the existing last paragraph and dashed items with the following new text:
The above operating characteristics shall be recorded for the conditions below (if applicable)
at:
– rated supply voltage and filling pressure for operation;
– maximum supply voltage and filling pressure for operation;
– maximum supply voltage and minimum functional pressure for operation;
– minimum supply voltage and minimum functional pressure for operation;
– minimum supply voltage and filling pressure for operation.

7.101.3.1 General requirements
Delete the existing first sentence in the first paragraph.
Add the following first sentence to the second paragraph.
The tests may be combined.
7.102.4.1 Single-phase testing of a single pole of a three-pole circuit-breaker
Replace the existing second paragraph with the following new text:
Depending on the circuit-breaker design this document permits single-pole testing to cover
three-phase conditions. In those cases where the circuit-breaker is equipped with one operating
mechanism for all three poles, a complete three-pole assembly shall be supplied for the tests.
Replace the existing third paragraph with the following new text:
For short-circuit tests, in order to establish whether single-pole testing to cover three-phase
conditions is permitted, verification tests for making and breaking shall be performed.
Furthermore, it shall be checked that the operating characteristics of the circuit-breaker to be
single-phase tested correspond to the provisions of 7.101.1.1.

7.102.9.2 Insulation properties
Delete the existing note.
7.105.2.1 General
Delete the existing note.
– 8 – IEC 62271-100:2021/AMD1:2024
© IEC 2024
7.105.5.1 General
Replace the existing Table 16, Table 17, Table 18 and Table 19 with the following new tables:
Table 16 – Values of prospective TRV for class S1 circuit-breakers rated for k = 1,5
pp
U Test- k k u t t u' t' u /t
r pp af c 3 d c 3
duty
kV p.u p.u kV µs µs kV µs kV/µs
T100 1,5 1,4 6,17 40,7 6,10 2,06 19,7 0,152
T60 1,5 1,5 6,61 17,9 2,68 2,20 8,65 0,370
3,6
T30 1,5 1,6 7,05 8,95 1,34 2,35 4,32 0,788
T10 1,5 1,7 7,50 8,95 1,34 2,50 4,32 0,838
T100 1,5 1,4 8,16 44,8 6,73 2,72 21,7 0,182
T60 1,5 1,5 8,74 19,7 2,96 2,91 9,54 0,443
4,76
T30 1,5 1,6 9,33 9,87 1,48 3,11 4,77 0,945
T10 1,5 1,7 9,91 9,87 1,48 3,30 4,77 1,00
T100 1,5 1,4 12,3 51,5 7,73 4,12 24,9 0,240
T60 1,5 1,5 13,2 22,7 3,40 4,41 11,0 0,584
7,2
T30 1,5 1,6 14,1 11,3 1,70 4,70 5,48 1,24
T10 1,5 1,7 15,0 11,3 1,70 5,00 5,48 1,32
T100 1,5 1,4 14,1 54,0 8,09 4,72 26,1 0,262
T60 1,5 1,5 15,2 23,7 3,56 5,05 11,5 0,638
8,25
T30 1,5 1,6 16,2 11,9 1,78 5,39 5,74 1,36
T10 1,5 1,7 17,2 11,9 1,78 5,73 5,74 1,45
T100 1,5 1,4 20,6 61,8 9,27 6,86 29,9 0,333
T60 1,5 1,5 22,0 27,2 4,08 7,35 13,1 0,811
T30 1,5 1,6 23,5 13,6 2,04 7,84 6,57 1,73
T10 1,5 1,7 25,0 13,6 2,04 8,33 6,57 1,84
T100 1,5 1,4 25,7 67,7 10,2 8,57 32,7 0,380
T60 1,5 1,5 27,6 29,8 4,47 9,19 14,4 0,925
T30 1,5 1,6 29,4 14,9 2,23 9,80 7,20 1,97
T10 1,5 1,7 31,2 14,9 2,23 10,4 7,20 2,10
T100 1,5 1,4 26,6 68,7 10,3 8,86 33,2 0,387
T60 1,5 1,5 28,5 30,2 4,53 9,49 14,6 0,943
15,5
T30 1,5 1,6 30,4 15,1 2,27 10,1 7,30 2,01
T10 1,5 1,7 32,3 15,1 2,27 10,8 7,30 2,14
T100 1,5 1,4 30,0 72,5 10,9 10,0 35,0 0,414
T60 1,5 1,5 32,1 31,9 4,79 10,7 15,4 1,00
17,5
T30 1,5 1,6 34,3 16,0 2,39 11,4 7,71 2,15
T10 1,5 1,7 36,4 16,0 2,39 12,1 7,71 2,28
T100 1,5 1,4 41,2 85,0 12,7 13,7 41,1 0,484
T60 1,5 1,5 44,1 37,4 5,61 14,7 18,1 1,18
T30 1,5 1,6 47,0 18,7 2,80 15,7 9,04 2,52
T10 1,5 1,7 50,0 18,7 2,80 16,7 9,04 2,67

© IEC 2024
U Test- k k u t t u' t' u /t
r pp af c 3 d c 3
duty
kV p.u p.u kV µs µs kV µs kV/µs
T100 1,5 1,4 44,2 88,4 13,3 14,7 42,7 0,500
T60 1,5 1,5 47,4 38,9 5,84 15,8 18,8 1,22

25,8
T30 1,5 1,6 50,6 19,5 2,92 16,9 9,40 2,60
T10 1,5 1,7 53,7 19,5 2,92 17,9 9,40 2,76
T100 1,5 1,4 46,3 90,7 13,6 15,4 43,8 0,511
T60 1,5 1,5 49,6 39,9 5,99 16,5 19,3 1,24
T30 1,5 1,6 52,9 20,0 2,99 17,6 9,64 2,65
T10 1,5 1,7 56,2 20,0 2,99 18,7 9,64 2,82
T100 1,5 1,4 61,7 107 16,1 20,6 51,8 0,576
T60 1,5 1,5 66,1 47,2 7,07 22,0 22,8 1,40
T30 1,5 1,6 70,5 23,6 3,54 23,5 11,4 2,99
T10 1,5 1,7 75,0 23,6 3,54 25,0 11,4 3,18
T100 1,5 1,4 65,2 111 16,6 21,7 53,5 0,589
T60 1,5 1,5 69,8 48,7 7,30 23,3 23,5 1,43
T30 1,5 1,6 74,5 24,3 3,65 24,8 11,8 3,06
T10 1,5 1,7 79,1 24,3 3,65 26,4 11,8 3,25
T100 1,5 1,4 69,4 115 17,2 23,1 55,5 0,605
T60 1,5 1,5 74,4 50,5 7,58 24,8 24,4 1,47
40,5
T30 1,5 1,6 79,4 25,3 3,79 26,5 12,2 3,14
T10 1,5 1,7 84,3 25,3 3,79 28,1 12,2 3,34
T100 1,5 1,4 82,8 127 19,0 27,6 61,4 0,652
T60 1,5 1,5 88,7 55,9 8,38 29,6 27,0 1,59
48,3
T30 1,5 1,6 94,6 27,9 4,19 31,5 13,5 3,39
T10 1,5 1,7 101 27,9 4,19 33,5 13,5 3,60
T100 1,5 1,4 89,2 132 19,8 29,7 63,9 0,674
T60 1,5 1,5 95,5 58,2 8,73 31,8 28,1 1,64
T30 1,5 1,6 102 29,1 4,37 34,0 14,1 3,50
T10 1,5 1,7 108 29,1 4,37 36,1 14,1 3,72
T100 1,5 1,4 124 166 24,9 41,4 80,1 0,750
T60 1,5 1,5 133 72,9 10,9 44,4 35,2 1,83
72,5
T30 1,5 1,6 142 36,5 5,47 47,4 17,6 3,90
T10 1,5 1,7 151 36,5 5,47 50,3 17,6 4,14
NOTE k = 1,5 is specified to cover transformer-limited fault conditions with X /X higher than 3,0 (for example
pp 0 1
non-effectively earthed transformers in effectively earthed neutral systems, or cases of transformers having one
side effectively earthed and the other connected to non-effectively earthed neutral systems).

– 10 – IEC 62271-100:2021/AMD1:2024
© IEC 2024
Table 17 – Values of prospective TRV for class S1 circuit-breakers rated for k = 1,3
pp
U Test- k k u t t u' t' u /t
r pp af c 3 d c 3
duty
kV p.u p.u kV µs µs kV µs kV/µs
T100 1,3 1,4 5,35 35,2 5,29 1,78 17,0 0,152
T60 1,3 1,5 5,73 15,5 2,33 1,91 7,50 0,370
3,6
T30 1,3 1,6 6,11 7,75 1,16 2,04 3,75 0,788
T10 1,5 1,7 7,50 8,95 1,34 2,50 4,32 0,838
T100 1,3 1,4 7,07 38,9 5,83 2,36 18,8 0,182
T60 1,3 1,5 7,58 17,1 2,57 2,53 8,27 0,443
4,76
T30 1,3 1,6 8,08 8,55 1,28 2,69 4,13 0,945
T10 1,5 1,7 9,91 9,87 1,48 3,30 4,77 1,00
T100 1,3 1,4 10,7 44,6 6,70 3,57 21,6 0,240
T60 1,3 1,5 11,5 19,6 2,95 3,82 9,49 0,584
7,2
T30 1,3 1,6 12,2 9,82 1,47 4,08 4,75 1,24
T10 1,5 1,7 15,0 11,3 1,70 5,00 5,48 1,32
T100 1,3 1,4 12,3 46.8 7.01 4,09 22,6 0,262
T60 1,3 1,5 13,1 20,6 3,09 4,38 9,94 0,638
8,25
T30 1,3 1,6 14,0 10,3 1,54 4,67 4,97 1,36
T10 1,5 1,7 17,2 11,9 1,78 5,73 5,74 1,45
T100 1,3 1,4 17,8 53,6 8,03 5,94 25,9 0,333
T60 1,3 1,5 19,1 23,6 3,54 6,37 11,4 0,811
T30 1,3 1,6 20,4 11,8 1,77 6,79 5,70 1,73
T10 1,5 1,7 25,0 13,6 2,04 8,33 6,57 1,84
T100 1,3 1,4 22,3 58,7 8,80 7,43 28,4 0,380
T60 1,3 1,5 23,9 25,8 3,87 7,96 12,5 0,925
T30 1,3 1,6 25,5 12,9 1,94 8,49 6,24 1,97
T10 1,5 1,7 31,2 14,9 2,23 10,4 7,20 2,10
T100 1,3 1,4 23,0 59,5 8,93 7,68 28,8 0,387
T60 1,3 1,5 24,7 26,2 3,93 8,23 12,7 0,943
15,5
T30 1,3 1,6 26,3 13,1 1,96 8,77 6,33 2,01
T10 1,5 1,7 32,3 15,1 2,27 10,8 7,30 2,14
T100 1,3 1,4 26,0 62.8 9,43 8,67 30,4 0,414
T60 1,3 1,5 27,9 27,7 4,15 9,29 13,4 1,01
17,5
T30 1,3 1,6 29,7 13,8 2,07 9,91 6,68 2,15
T10 1,5 1,7 36,4 16,0 2,39 12,1 7,71 2,28
T100 1,3 1,4 35,7 73,6 11,0 11,9 35,6 0,484
T60 1,3 1,5 38,2 32,4 4,86 12,7 15,7 1,18
T30 1,3 1,6 40,8 16,2 2,43 13,6 7,83 2,52
T10 1,5 1,7 50,0 18,7 2,80 16,7 9,04 2,67
T100 1,3 1,4 38,3 76,6 11,5 12,8 37,0 0,500
T60 1,3 1,5 41,1 33,7 5,06 13,7 16,3 1,22
25,8
T30 1,3 1,6 43,8 16,9 2,53 14,6 8,15 2,60
T10 1,5 1,7 53,7 19,5 2,92 17,9 9,4 2,76

© IEC 2024
U Test- k k u t t u' t' u /t
r pp af c 3 d c 3
duty
kV p.u p.u kV µs µs kV µs kV/µs
T100 1,3 1,4 40,1 78,6 11,8 13,4 38,0 0,511
T60 1,3 1,5 43,0 34,6 5,19 14,3 16,7 1,24
T30 1,3 1,6 45,9 17,3 2,59 15,3 8,36 2,65
T10 1,5 1,7 56,2 20,0 2,99 18,7 9,64 2,82
T100 1,3 1,4 53,5 92,9 13,9 17,8 44,9 0,576
T60 1,3 1,5 57,3 40,9 6,13 19,1 19,8 1,40
T30 1,3 1,6 61,1 20,4 3,07 20,4 9,88 2,99
T10 1,5 1,7 75,0 23,6 3,54 25,0 11,4 3,18
T100 1,3 1,4 56,5 95,9 14,4 18,8 46,4 0,589
T60 1,3 1,5 60,5 42,2 6,33 20,2 20,4 1,43
T30 1,3 1,6 64,5 21,1 3,16 21,5 10,2 3,06
T10 1,5 1,7 79,1 24,3 3,65 26,4 11,8 3,25
T100 1,3 1,4 60,2 99,5 14,9 20,1 48,1 0,605
T60 1,3 1,5 64,5 43,8 6,57 21,5 21,2 1,47
40,5
T30 1,3 1,6 68,8 21,9 3,28 22,9 10,6 3,14
T10 1,5 1,7 84,3 25,3 3,79 28,1 12,2 3,34
T100 1,3 1,4 71,8 110 16,5 23,9 53,2 0,652
T60 1,3 1,5 76,9 48,4 7,26 25,6 23,4 1,59
48,3
T30 1,3 1,6 82,0 24,2 3,63 27,3 11,7 3,39
T10 1,5 1,7 101 27,9 4,19 33,5 13,5 3,60
T100 1,3 1,4 77,3 115 17,2 25,8 55,4 0,674
T60 1,3 1,5 82,8 50,4 7,57 27,6 24,4 1,64
T30 1,3 1,6 88,3 25,2 3,78 29,4 12,2 3,50
T10 1,5 1,7 108 29,1 4,37 36,1 14,1 3,72
T100 1,3 1,4 108 144 21,6 35,9 69,4 0,750
T60 1,3 1,5 115 62,2 9,48 38,5 30,5 1,83
72,5
T30 1,3 1,6 123 31,6 4,74 41,0 15,3 3,90
T10 1,5 1,7 151 36,5 5,47 50,3 17,6 4,14
NOTE k = 1,5 is specified to cover transformer-limited fault conditions with X /X higher than 3,0 (for example
pp 0 1
non-effectively earthed transformers in effectively earthed neutral systems, or cases of transformers having one
side effectively earthed and the other connected to non-effectively earthed neutral systems).

– 12 – IEC 62271-100:2021/AMD1:2024
© IEC 2024
Table 18 – Values of prospective TRV for class S2 circuit-breakers rated for k = 1,5
pp
U Test-duty k k u t t u' t' u /t
r pp af c 3 d c 3
kV p.u. p.u. kV μs μs kV μs kV/μs
T100 1,5 1,54 6,79 11,5 0,57 2,26 4,40 0,591
T60 1,5 1,65 7,27 7,70 1,15 2,42 3,72 0,945
3,6
T30 1,5 1,74 7,67 4,59 0,689 2,56 2,22 1,67
T10 1,5 1,80 7,94 4,59 0,689 2,65 2,22 1,73
T100 1,5 1,54 8,98 13,9 0,697 2,99 5,35 0,644
T60 1,5 1,65 9,62 9,34 1,40 3,21 4,52 1,03
4,76
T30 1,5 1,74 10,1 5,58 0,837 3,38 2,70 1,82
T10 1,5 1,80 10,5 5,58 0,837 3,50 2,70 1,88
T100 1,5 1,54 13,6 18,6 0,930 4,53 7,13 0,730
T60 1,5 1,65 14,6 12,5 1,87 4,85 6,02 1,17
7,2
T30 1,5 1,74 15,3 7,44 1,12 5,11 3,59 2,06
T10 1,5 1,80 15,9 7,44 1,12 5,29 3,59 2,13
T100 1,5 1,54 15,6 20,4 1,02 5,19 7,83 0,761
T60 1,5 1,65 16,7 13,7 2,05 5,56 6,62 1,22
8,25
T30 1,5 1,74 17,6 8,18 1,23 5,86 3,95 2,15
T10 1,5 1,80 18,2 8,18 1,23 6,06 3,95 2,22
T100 1,5 1,54 22,6 26,5 1,33 7,54 10,2 0,854
T60 1,5 1,65 24,3 17,8 2,67 8,08 8,59 1,36
T30 1,5 1,74 25,6 10,6 1,59 8.52 5,13 2,41
T10 1,5 1,80 26,5 10,6 1,59 8,82 5,13 2,49
T100 1,5 1,54 28,3 31,0 1,55 (4,64) 9,43 11,9 (15,0) 0,914
T60 1,5 1,65 30,3 20,7 3,11 10,1 10,0 1,46
T30 1,5 1,74 32,0 12,4 1,86 10,7 5,99 2,58
T10 1,5 1,80 33,1 12,4 1,86 11,0 5,99 2,67
T100 1,5 1,54 29,2 31,7 1,58 (4,75) 9,74 12,1 (15,3) 0,923
T60 1,5 1,65 31,3 21,2 3,18 10,4 10,3 1,48
15,5
T30 1,5 1,74 33,0 12,7 1,90 11,0 6,12 2,61
T10 1,5 1,80 34,2 12,7 1,90 11,4 6,12 2,70
T100 1,5 1,54 33,0 34,5 1,72 (5,17) 11,0 13,2 (16,7) 0,958
T60 1,5 1,65 35,4 23,1 3,46 11,8 11,2 1,53
17,5
T30 1,5 1,74 37,3 13,8 2,07 12,4 6,66 2,70
T10 1,5 1,80 38,6 13,8 2,07 12,9 6,66 2,80
T100 1,5 1,54 45,3 42,9 2,15 (6,44) 15,1 16,5 (20,7) 1,05
T60 1,5 1,65 48,5 28,8 4,31 16,2 13,9 1,69
T30 1,5 1,74 51,1 17,2 2,58 17,0 8,32 2,98
T10 1,5 1,8 52,9 17,2 2,58 17,6 8,32 3,08
T100 1,5 1,54 48,7 45,1 2,26 (6,77) 16,2 17,3 (21,8) 1,08
T60 1,5 1,65 52,1 30,2 4,54 17,4 14,6 1,72
25,8
T30 1,5 1,74 55,0 18,1 2,71 18,3 8,73 3,04
T10 1,5 1,80 56,9 18,1 2,71 19,0 8,73 3,15

© IEC 2024
U Test-duty k k u t t u' t' u /t
r pp af c 3 d c 3
kV p.u. p.u. kV μs μs kV μs kV/μs
T100 1,5 1,54 50,9 46,6 2,33 (6,99) 17,0 17,9 (22,5) 1,09
T60 1,5 1,65 54,6 31,2 4,68 18,2 15,1 1,75
T30 1,5 1,74 57,5 18,6 2,80 19,2 9,01 3,09
T10 1,5 1,80 59,5 18,6 2,80 19,8 9,01 3,19
T100 1,5 1,54 67,9 56,9 2,85 (8,54) 22,6 21,8 (27,5) 1,19
T60 1,5 1,65 72,8 38,1 5,72 24,3 18,4 1,91
T30 1,5 1,74 76,7 22,8 3,41 25,6 11,0 3,37
T10 1,5 1,80 79,4 22,8 3,41 26,5 11,0 3,49
T100 1,5 1,54 71,7 59,1 2,95 (8,90) 23,9 22,6 (28,7) 1,21
T60 1,5 1,65 76,8 39,6 5,94 25,6 19,1 1,94
T30 1,5 1,74 81,0 23,6 3,54 27,0 11,4 3,43
T10 1,5 1,80 83,8 23,6 3,54 27,9 11,4 3,54
T100 1,5 1,54 76,4 61,8 3,09 (9,26) 25,5 23,7 (29,8) 1,24
T60 1,5 1,65 81,8 41,4 6,21 27,3 20,0 1,98
40,5
T30 1,5 1,74 86,3 24,7 3,71 28,8 11,9 3,49
T10 1,5 1,80 89,3 24,7 3,71 29,8 11,9 3,61
T100 1,5 1,54 91,1 69,8 3,49 (10,5) 30,4 26,8 (33,7) 1,31
T60 1,5 1,65 97,6 46,8 7,01 32,5 22,6 2,09
48,3
T30 1,5 1,74 103 27,9 4,19 34,3 13,5 3,69
T10 1,5 1,80 106 27,9 4,19 35,5 13,5 3,81
T100 1,5 1,54 98,1 73,5 3,67 (11,0) 32,7 28,2 (35,5) 1,33
T60 1,5 1,65 105 49,2 7,38 35,0 23,8 2,13
T30 1,5 1,74 111 29,4 4,41 36,9 14,2 3,77
T10 1,5 1,80 115 29,4 4,41 38,2 14,2 3,90
T100 1,5 1,54 137 92,6 4,63 (13,9) 45,6 35,5 (44,7) 1,48
T60 1,5 1,65 147 62,0 9,30 48,8 30,0 2,36
72,5
T30 1,5 1,74 155 37,0 5,55 51,5 17,9 4,17
T10 1,5 1,80 160 37,0 5,55 53,3 17,9 4,32
NOTE Where two values of times t and t' are given for test-duty T100 separated by brackets, the time t in
d d
brackets is the upper limit of the time delay t that can be used for test-duty T100 if short-line fault tests are also
d
made. For such cases, the delay line terminates at t' given in brackets. If this is not the case, the lower values of
t and t' apply.
d
– 14 – IEC 62271-100:2021/AMD1:2024
© IEC 2024
Table 19 – Values of prospective TRV for class S2 circuit-breakers rated for k = 1,3
pp
U k k u t t u /t
Test-duty u' t'
r pp af c 3 d c 3
kV p.u p.u kV µs µs kV µs kV/µs
T100 1,3 1,54 5,88 9,95 0,498 1,96 3,82 0,591
T60 1,3 1,65 6,30 6,67 1,00 2,10 3,22 0,945
3,6
T30 1,3 1,74 6,65 3,98 0,597 2,22 1,92 1,67
T10 1,5 1,80 7,94 4,59 0,689 2,65 2,22 1,73
T100 1,3 1,54 7,78 12,1 0,604 2,59 4,63 0,644
T60 1,3 1,65 8,34 8,10 1,21 2,78 3,91 1,03
4,76
T30 1,3 1,74 8,79 4,83 0,725 2,93 2,34 1,82
T10 1,5 1,80 10,5 5,58 0,837 3,50 2,70 1,88
T100 1,3 1,54 11,8 16,1 0,806 3,92 6,18 0,730
T60 1,3 1,65 12,6 10,8 1,62 4,20 5,22 1,17
7,2
T30 1,3 1,74 13,3 6,45 0,967 4,43 3,12 2,06
T10 1,5 1,80 15,9 7,44 1,12 5,29 3,59 2,13
T100 1,3 1,54 13,5 17,7 0,886 4,50 6,79 0,761
T60 1,3 1,65 14,5 11,9 1,78 4,82 5,74 1,22
8,25
T30 1,3 1,74 15,2 7,09 1,06 5,08 3,42 2,15
T10 1,5 1,80 18,2 8,18 1,23 6,06 3,95 2,22
T100 1,3 1,54 19,6 23,0 1,15 6,54 8,81 0,854
T60 1,3 1,65 21,0 15,4 2,31 7,01 7,44 1,36
T30 1,3 1,74 22,2 9,19 1,38 7.39 4,44 2,41
T10 1,5 1,80 26,5 10,6 1,59 8,82 5,13 2,49
T100 1,3 1,54 24,5 26,8 1,34 (4,03) 8,17 10,3 (13,0) 0,914
T60 1,3 1,65 26,3 18,0 2,70 8,76 8,69 1,46
T30 1,3 1,74 27,7 10,7 1,61 9,23 5,19 2,58
T10 1,5 1,80 33,1 12,4 1,86 11,0 5,99 2,67
T100 1,3 1,54 25,3 27,5 1,37 (4,12) 8,45 10,5 (13,3) 0,923
T60 1,3 1,65 27,2 18,4 2,76 9,05 8,89 1,48
15,5
T30 1,3 1,74 28,6 11,0 1,65 9,54 5,31 2,61
T10 1,5 1,80 34,2 12,7 1,90 11,4 6,12 2,70
T100 1,3 1,54 28,6 29,9 1,49 (4,48) 9,54 11,5 (14,4) 0,958
T60 1,3 1,65 30,6 20,0 3,00 10,2 9,67 1,53
17,5
T30 1,3 1,74 32,3 11,9 1,79 10,8 5,78 2,70
T10 1,5 1,80 38,6 13,8 2,07 12,9 6,66 2,80
T100 1,3 1,54 39,2 37,2 1,86 (5,58) 13,1 14,3 (18,0) 1,05
T60 1,3 1,65 42,0 24,9 3,74 14,0 12,0 1,69
T30 1,3 1,74 44,3 14,9 2,23 14,8 7,19 2,98
T10 1,5 1,80 52,9 17,2 2,58 17,6 8,32 3,08
T100 1,3 1,54 42,2 39,1 1,96 (5,87) 14,1 15,0 (18,9) 1,08
T60 1,3 1,65 45,2 26,2 3,93 15,1 12,7 1,72
25,8
T30 1,3 1,74 47,7 15,6 2,35 15,9 7,56 3,04
T10 1,5 1,80 56,9 18,1 2,71 19,0 8,73 3,15

© IEC 2024
U k k u t t u /t
Test-duty u' t'
r pp af c 3 d c 3
kV p.u p.u kV µs µs kV µs kV/µs
T100 1,3 1,54 44,1 40,4 2,02 (6,06) 14,7 15,5 (19,5) 1,09
T60 1,3 1,65 47,3 27,1 4,06 15,8 13,1 1,75
T30 1,3 1,74 49,9 16,2 2,42 16,6 7,83 3,09
T10 1,5 1,80 59,5 18,6 2,80 19,8 9,01 3,19
T100 1,3 1,54 58,8 49,3 2,47 (7,40) 19,6 18,9 (23,8) 1,19
T60 1,3 1,65 63,1 33,0 4,96 21,0 16,0 1,91
T30 1,3 1,74 66,5 19,7 2,96 22,2 9,53 3,37
T10 1,5 1,80 79,4 22,8 3,41 26,4 11,0 3,49
T100 1,3 1,54 62,1 51,2 2,56 (7,68) 20,7 19,6 (24,8) 1,21
T60 1,3 1,65 66,6 34,3 5,15 22,2 16,6 1,94
T30 1,3 1,74 70,2 20,5 3,07 23,4 9,90 3,43
T10 1,5 1,80 83,8 23,6 3,54 27,9 11,4 3,54
T100 1,3 1,54 66,2 53,5 2,68 (8,03) 22,1 20,5 (25,9) 1,24
T60 1,3 1,65 70,9 35,9 5,38 23,6 17,3 1,98
40,5
T30 1,3 1,74 74,8 21,4 3,21 24,9 10,3 3,49
T10 1,5 1,80 89,3 24,7 3,71 29,8 11,9 3,61
T100 1,3 1,54 79,0 60,5 3,02 (9,07) 26,3 23,2 (29,2) 1,31
T60 1,3 1,65 84,6 40,5 6,08 28,2 19,6 2,09
48,3
T30 1,3 1,74 89,2 24,2 3,63 29,7 11,7 3,69
T10 1,5 1,80 106 27,9 4,19 35,5 13,5 3,81
T100 1,3 1,54 85,0 63,7 3,18 (9,55) 28,3 24,4 (30,8) 1,33
T60 1,3 1,65 91,1 42,7 6,40 30,4 20,6 2,13
T30 1,3 1,74 96,0 25,5 3,82 32,0 12,3 3,77
T10 1,5 1,80 115 29,4 4,41 38,2 14,2 3,90
T100 1,3 1,54 119 80,2 4,01 (12,0) 39,5 30,8 (38,8) 1,48
T60 1,3 1,65 127 53,7 8,06 42,3 26,0 2,36
72,5
T30 1,3 1,74 134 32,1 4,81 44,6 15,5 4,17
T10 1,5 1,80 160 37,0 5,55 53,3 17,9 4,32
NOTE Where two values of times t and t' are given for test-duty T100 separated by brackets, the time t in
d d
brackets is the upper limit of the time delay t that can be used for test-duty T100 if short-line fault tests are also
d
made. For such cases, the delay line terminates at t' given in brackets. If this is not the case, the lower values of
t and t' apply.
d
Replace, below Table 19, in b), the existing third dashed item with the following new text.
– TRV peak value
u= k× k××U
c pp af r
where k is equal to 1,4 for test-duty T100 and for the supply side circuit for SLF, 1,5 for
af
test-duty T60, 1,54 for test-duty T30, 1,765 for test-duty T10 in case k is 1,3, 1,53
pp
(0,9 × 1,7) for test-duty T10 in case k is 1,5, and 1,25 for out-of-phase breaking.
pp
– 16 – IEC 62271-100:2021/AMD1:2024
© IEC 2024
Replace, below Table 19, in c), the existing fourth dashed item with the following new text:
– TRV peak value
u= k× k××U
c pp af r
where k is equal to 1,5 for test-duty T100 and for the supply side circuit for SLF, 1,5 for
af
test-duty T60, 1,54 for test-duty T30, 1,765 for test-duty T10, and 1,25 for out-of-phase
breaking.
Replace the existing Table 20 with the following new table:
Table 20 – Values of prospective TRV for circuit-breakers rated
for k = 1,2 or 1,3 – Rated voltages of 100 kV and above
pp
u /t
Test- a 1 1
a
U k k u t u t or t t
u'
t'
r pp af 1 1 c 2 3 d
duty u /t
c 3
kV p.u. p.u. kV µs kV µs µs kV µs kV/µs
T100 1,3 1,40 80 40 149 160 2 (11) 40 22 (31) 2
T60 1,3 1,50 80 27 159 160 2-8 40 15-21 3
T30 1,3 1,54 - - 163 33 5 54 16 5
T10 1,3 1,765 - - 187 27 4 62 13 7
T100 1,3 1,40 98 49 183 196 2 (14) 49 26 (38) 2
T60 1,3 1,50 98 33 196 196 2-10 49 18-26 3
T30 1,3 1,54 - - 201 40 6 67 19 5
T10 1,3 1,765 - - 230 33 5 77 16 7
T100 1,3 1,40 115 58 215 232 2 (16) 58 31 (45) 2
T60 1,3 1,50 115 38 231 232 2-12 58 21-31 3
T30 1,3 1,54 - - 237 47 7 79 23 5
T10 1,3 1,765 - - 272 39 6 91 19 7
T100 1,3 1,40 135 68 253 272 2 (19) 68 36 (53) 2
T60 1,3 1,50 135 45 271 272 2-14 68 25-36 3
T30 1,3 1,54 - - 278 56 8 93 27 5
T10 1,3 1,765 - - 319 46 7 106 22 7
T100 1,3 1,40 195 98 364 392 2 (27) 98 51 (76) 2
T60 1,3 1,50 195 65 390 392 2-20 98 35-52 3
T30 1,3 1,54 - - 400 80 12 133 39 5
T10 1,3 1,765 - - 459 66 10 153 32 7
T100 1,3 1,40 239 119 446 476 2 (33) 119 62 (93) 2
T60 1,3 1,50 239 80 478 476 2-24 119 42-64 3
T30 1,3 1,54 - - 490 98 15 163 47 5
T10 1,3 1,765 - - 562 80 12 187 39 7
T100 1,3 1,40 288 144 538 576 2 (40) 144 74 (112) 2
T60 1,3 1,50 288 96 576 576 2-29 144 50-77 3
T30 1,3 1,54 - - 592 118 18 197 57 5
T10 1,3 1,765 - - 678 97 15 226 47 7
T100 1,3 1,40 334 167 624 668 2 (47) 167 86 (130) 2
T60 1,3 1,50 334 111 669 668 2-33 167 58-89 3
T30 1,3 1,54 - - 687 137 21 229 66 5
T10 1,3 1,765 - - 787 112 17 262 54 7

© IEC 2024
u /t
Test-
a 1 1
a
U k k u t u
t or t t
u' t'
r pp af 1 1 c
2 3 d
duty u /t
c 3
kV p.u. p.u. kV µs kV µs µs kV µs kV/µs
T100 1,3 1,40 438 219 817 876 2 (61) 219 2
(171)
T60 1,3 1,50 438 146 876 876 2-44 219 75-117 3
T30 1,3 1,54 - - 899 180 27 300 87 5
T10 1,3 1,765 - - 1 031 147 22 344 71 7
T100 1,3 1,40 637 318 1 189 1 272 2 (89) 318 2
(248)
T60 1,3 1,50 637 212 1 274 1 272 2-64 318 108-170 3
T30 1,3 1,54 - - 1 308 262 39 436 126 5
T10 1,3 1,765 - - 1 499 214 32 500 103 7
T100 1,2 1,50 808 404 1 617 1 212 2 (113) 404 2
(315)
T60 1,2 1,50 808 269 1 617 1 212 2-81 404 137-216 3
1 100
T30 1,2 1,54 - - 1 660 332 50 553 161 5
T10 1,2 1,765 - - 1 902 271 41 634 131 7
T100 1,2 1,50 882 441 1 764 1 323 2 (123) 441 2
(343)
T60 1,2 1,50 882 294 1 764 1 323 2-88 441 149-235 3
1 200
T30 1,2 1,54 - - 1 811 362 54 604 175 5
T10 1,2 1,765 - - 2 075 296 44 692 143 7
NOTE Test-duty T10 covers transformer-limited fault conditions with X /X higher than 3,0 (for example non-
0 1
effectively earthed transformers in effectively earthed neutral systems, or cases of transformers having one side
effectively earthed and the other connected to non-effectively earthed neutral systems). For rated voltages higher
than 170 kV the TRV specified covers also cases of three-phase line faults with effectively earthed neutral systems

where coupling between phases can lead to an amplitude factor of 1,765.
a
Where two values of times t and t' are given for terminal fault test-duty T60, those indicate the lower and upper
d
limits which should be used for testing. The time delay t and the time t' during testing should not be shorter
d
than their respective lower limits and should not be longer than their respective upper limits.
b
Where two values of times t and t' are given for test-duty T100 separated by brackets, the time t in brackets
d d
is the upper limit of the time delay t that can be used for test-duty T100 if short-line fault tests are also made.
d
For such cases, the delay line terminates at t' given in brackets. If this is not the case, the lower values of t
d
and t' apply.
– 18 – IEC 62271-100:2021/AMD1:2024
© IEC 2024
7.105.5.6 Test-duties OP1 and OP2
Replace the existing Table 22, Table 23, Table 24 and Table 25 with the following new tables:
Table 22 – Values of prospective TRV for out-of-phase tests
on class S1 circuit-breakers for k = 2,5
pp
U k k u t t u /t
u' t'
r pp af c 3 d c 3
kV p.u. p.u. kV µs µs kV µs kV/µs
3,6 2,5 1,25 9,19 81,3 12,2 3,06 39,3 0,113
4,76 2,5 1,25 12,1 89,7 13,5 4,05 43,4 0,135
7,2 2,5 1,25 18,4 103 15,5 6,12 49,8 0,178
8,25 2,5 1,25 21,1 108 16,2 7,02 52,3 0,195
12 2,5 1,25 30,6 124 18,5 10,2 59,7 0,248
15 2,5 1,25 38,3 135 20,3 12,8 65,4 0,283
15,5 2,5 1,25 39,5 137 20,6 13,2 66,4 0,288
17,5 2,5 1,25 44,7 145 21,8 14,9 70,1 0,308
24 2,5 1,25 61,2 170 25,5 20,4 82,1 0,360
25,8 2,5 1,25 65,8 177 26,5 21,9 85,5 0,372
27 2,5 1,25 68,9 181 27,2 23,0 87,7 0,380
36 2,5 1,25 91,9 214 32,2 30,6 104 0,428
38 2,5 1,25 97,0 221 33,2 32,3 107 0,438
40,5 2,5 1,25 103 229 34,5 34,4 111 0,450
48,3 2,5 1,25 123 254 38,1 41,1 123 0,485
52 2,5 1,25 133 265 39,7 44,2 128 0,502
72,5 2,5 1,25 185 332 49,7 61,7 160 0,558

Table 23 – Values of prospective TRV for out-of-phase tests
on class S1 circuit-breakers for k = 2,0
pp
U k k u t t u /t
u' t'
r pp af c 3 d c 3
kV p.u. p.u. kV µs µs kV µs kV/µs
3,6 2,0 1,25 7,35 65,1 9,76 2,45 31,5 0,113
4,76 2,0 1,25 9,72 71,8 10,8 3,24 34,7 0,135
7,2 2,0 1,25 14,7 82,4 12,4 4,90 39,8 0,178
8,25 2,0 1,25 16,8 86,3 12,9 5,61 41,7 0,195
12 2,0 1,25 24,5 98,9 14,8 8,16 47,8 0,250
15 2,0 1,25 30,6 108 16,2 10,2 52,3 0,283
15,5 2,0 1,25 31,6 110 16,5 10,6 53,1 0,288
17,5 2,0 1,25 35,7 116 17,4 11,9 56,1 0,308
24 2,0 1,25 49,0 136 20,4 16,3 65,7 0,360
25,8 2,0 1,25 52,7 141 21,2 17,6 68,4 0,372
27 2,0 1,25 55,1 145 21,8 18,4 70,1 0,380
36 2,0 1,25 73,5 172 25,7 24,5 82,9 0,428
38 2,0 1,25 77,6 177 26,6 25,9 85,6 0,438
40,5 2,0 1,25 82,7 184 27,6 27,6 88,8 0,450
48,3 2,0 1,25 98,6 203 30,5 32,9 98,2 0,485
52 2,0 1,25 106 212 31,8 35,4 102 0,502
72,5 2,0 1,25 148 265 39,8 49,3 128 0,558

© IEC 2024
Table 24 – Values of prospective TRV for out-of-phase tests
on class S2 circuit-breakers for k = 2,5
pp
U k k u t t u /t
u' t'
r pp af c 3 d c 3
kV p.u. p.u. kV µs µs kV µs kV/µs
3,6 2,5 1,25 9,19 23,0 3,45 3,06 11,1 0,400
4,76 2,5 1,25 12,1 27,9 4,18 4,05 13,5 0,435
7,2 2,5 1,25 18,4 37,2 5,58 6,12 18,0 0,494
8,25 2,5 1,25 21,1 40,9 6,13 7,02 19,8 0,515
12 2,5 1,25 30,6 53,0 7,96 10,2 25,6 0,577
15 2,5 1,25 38,3 61,9 9,29 12,8 29,9 0,618
15,5 2,5 1,25 39,5 63,4 9,50 13,2 30,6 0,624
17,5 2,5 1,25 44,7 68,9 10,3 14,9 33,3 0,648
24 2,5 1,25 61,2 85,9 12,9 20,4 41,5 0,713
25,8 2,5 1,25 65,8 90,3 13,5 21,9 43,6 0,729
27 2,5 1,25 68,9 93,2 14,0 23,0 45,0 0,739
36 2,5 1,25 91,9 114 17,1 30,6 55,0 0,807
38 2,5 1,25 97,0 118 17,7 32,3 57,1 0,821
40,5 2,5 1,25 103 124 18,5 34,5 59,7 0,837
48,3 2,5 1,25 123 140 21,0 41,1 67,5 0,883
52 2,5 1,25 133 147 22,0 44,2 71,0 0,903
72,
...