IEC 62271-102:2001/AMD2:2013

Amendment 2 - High-voltage switchgear and controlgear - Part 102: Alternating current disconnectors and earthing switches

Amendement 2 - Appareillage à haute tension - Partie 102: Sectionneurs et sectionneurs de terre à courant alternatif

General Information

• Status: Published
• Publication Date: 13-Feb-2013
• ICS: 29.130.10 - High voltage switchgear and controlgear
• ICS: 29.130.99 - Other switchgear and controlgear
• Technical Committee: SC 17A - Switching devices
• Drafting Committee: MT 49 - TC 17/SC 17A/MT 49
• Current Stage: DELPUB - Deleted Publication
• Start Date: 09-Aug-2019
• Completion Date: 09-Aug-2019

Relations

• Amends: IEC 62271-102:2001 - High-voltage switchgear and controlgear - Part 102: Alternating current disconnectors and earthing switches
• Effective Date: 05-Sep-2023
• Revised: IEC 62271-102:2018 - High-voltage switchgear and controlgear - Part 102: Alternating current disconnectors and earthing switches
• Effective Date: 05-Sep-2023

Overview

IEC 62271-102:2001/AMD2:2013 is the second amendment to the international standard covering high-voltage switchgear and controlgear, specifically Part 102 which governs alternating current disconnectors and earthing switches. Published by the International Electrotechnical Commission (IEC), this amendment updates testing procedures, recommendations on mechanical and electrical parameters, and introduces new requirements for resistor-fitted disconnectors in metal-enclosed gas-insulated switchgear (GIS). It is essential for manufacturers, designers, and operators involved in high-voltage power system equipment, ensuring safety, reliability, and performance compliance.

Key Topics

• Updated Contact Zone Specifications
  Revised tables recommend specific contact zones for fixed contacts supported by flexible and rigid conductors at higher rated voltages (up to 1,200 kV). This ensures optimal electrical and mechanical connection performance.

• Enhanced Electrical Testing Arrangements
  New figures and test arrangements for single-phase testing of disconnectors and earthing switches with rated voltages from 52 kV and above reflect improved methodologies, covering horizontal isolation distances and vertical isolating distances with both flexible and rigid conductors.

• Rated Bus-Transfer Current Specifications
  For very high voltages (1,100 kV and 1,200 kV), rated bus-transfer current requirements have been refined to allow values up to 80% of the rated normal current without upper limits, improving operational flexibility.

• Introduction of Resistor-Fitted Disconnectors in GIS
  A new normative annex defines specific requirements for resistor fitted disconnectors intended to mitigate very fast transient overvoltages (VFTO) in gas-insulated switchgear rated 800 kV and above. It details design, construction, testing protocols, and performance verification procedures to ensure resistor integrity and reliable operation.

• Mechanical and Electrical Endurance Tests
  Amendments specify thorough type testing including mechanical endurance, bus-charging switching, and bus-transfer current switching tests with detailed criteria for resistor performance and visual inspection.

Applications

IEC 62271-102:2001/AMD2:2013 addresses critical components widely used in high-voltage power transmission and distribution networks:

• Power Utilities and Grid Operators
  To maintain operational safety and network reliability by standardizing disconnectors and earthing switches used in substations and overhead line systems.

• Switchgear Manufacturers
  For designing and producing compliant disconnectors and earthing switches capable of withstanding very high voltage and current conditions, including specialized products for gas-insulated systems.

• System Designers and Engineers
  To implement reliable switching solutions that provide safe isolation and grounding functions, minimizing overvoltage risks and optimizing maintenance and fault management processes.

• Testing Laboratories
  For conducting validated electrical, mechanical, and endurance tests using updated procedures and parameters to certify high-voltage switchgear performance and compliance.

Related Standards

• IEC 62271 Series
  Covers various aspects of high-voltage switchgear and controlgear including circuit breakers, load break switches, and protective devices.

• IEC 60071 Series
  Specifies insulation coordination principles relevant for coordination of clearance distances and withstand voltages in conjunction with disconnectors.

• IEC 60694
  General rules for high-voltage switchgear and controlgear standards, providing overarching guidance for design and testing.

• IEC 62271-1
  Defines common specifications for high-voltage switchgear and controlgear, supporting the detailed requirements laid out in Part 102.

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Keywords: IEC 62271-102 amendment, high-voltage switchgear, alternating current disconnectors, earthing switches, resistor fitted disconnectors, gas-insulated switchgear, VFTO mitigation, switchgear testing, bus-transfer current, high-voltage electrical equipment standard.

Standards Content (Sample)

IEC 62271-102 ®
Edition 1.0 2013-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
AMENDMENT 2
AMENDEMENT 2
High-voltage switchgear and controlgear –
Part 102: Alternating current disconnectors and earthing switches

Appareillage à haute tension –
Partie 102: Sectionneurs et sectionneurs de terre à courant alternatif

IEC 62271-102:2001/A2:2013
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IEC 62271-102 ®
Edition 1.0 2013-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
AMENDMENT 2
AMENDEMENT 2
High-voltage switchgear and controlgear –

Part 102: Alternating current disconnectors and earthing switches

Appareillage à haute tension –

Partie 102: Sectionneurs et sectionneurs de terre à courant alternatif

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX L
ICS 29.130.10; 29.130.99 ISBN 978-2-83220-611-9

– 2 – 62271-102 Amend. 2 © IEC:2013

FOREWORD
This amendment has been prepared by subcommittee 17A: High-voltage switchgear and

controlgear, of IEC technical committee 17: Switchgear and controlgear.

The text of this amendment is based on the following documents:

FDIS Report on voting
17A/1029/FDIS 17A/1035/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 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
_____________
62271-102 Amend. 2 © IEC:2013 – 3 –

Table 1 – Recommended contact zones for "fixed" contacts supported by flexible
conductors
Add the following new lines to the existing Table 1:

800 250 650 450 550
1 100 300 700 500 600
1 200 300 700 500 600
Table 2 – Recommended contact zones for "fixed" contacts supported by rigid
conductors
Add the following new lines to the existing Table 2:
1 100 250 250 250
1 200 250 250 250
Table 3 – Recommended static mechanical terminal loads
Add the following new lines to the existing Table 3:
≤ 4 000 2 000 660 4 000 1 600
1 100 – 1 200 2 000
2 500 1 000 5 000 2 000
> 4 000
Table 5 – Power frequency 1 min withstand voltages
Add the following new lines to the existing Table 5:
1 100 1 270 -
1 200 1 386 -
Figure 4 – Single-phase test arrangement for disconnectors with a horizontal isolating
distance and for earthing switches with rated voltage of 52 kV and above
Replace the existing Figure 4 by the following new figure:

– 4 – 62271-102 Amend. 2 © IEC:2013

a) Test arrangement for disconnectors rated 52 kV to 550 kV

b) Test arrangement for disconnectors rated above 550 kV
Key
l minimum centre-to-centre distance between adjacent poles, as stated by the manufacturer
Figure 4 – Single-phase test arrangement for disconnectors with a horizontal isolating
distance and for earthing switches with rated voltage of 52 kV and above
Figure 5 – Single-phase test arrangement for divided support disconnectors (earthing
switches) with a vertical isolating distance with rated voltages of 52 kV and above to be
used with flexible conductors
Replace the existing Figure 5 by the following new figure:

62271-102 Amend. 2 © IEC:2013 – 5 –

a) Test arrangement for disconnectors rated 52 kV to 550 kV

b) Test arrangement for disconnectors rated above 550 kV
Figure 5 – Single-phase test arrangement for divided support disconnectors (earthing
switches) with a vertical isolating distance with rated voltages of 52 kV and above to be
used with flexible conductors
– 6 – 62271-102 Amend. 2 © IEC:2013

Figure 6 – Single-phase test arrangement for divided support disconnectors (earthing

switches) with a vertical isolating distance with rated voltages of 52 kV and above to be

used with rigid conductors
Replace the existing Figure 6 by the following new figure:

For U ≤ 145 kV l ≥ 4l
r 3 1
For U ≥ 170 kV l = 20 m ± 10 %
r 3
a) Test arrangement for disconnectors rated 52 kV to 550 kV

62271-102 Amend. 2 © IEC:2013 – 7 –

b) Test arrangement for disconnectors rated above 550 kV
Figure 6 – Single-phase test arrangement for divided support disconnectors (earthing
switches) with a vertical isolating distance with rated voltages of 52 kV and above
to be used with rigid conductors

B.4.106.1 Rated -transfer current
Replace the existing title of this subclause by the following new title:
B.4.106.1 Rated bus-transfer current
Renumber the existing note as NOTE 1.
Add, after the existing text of this subclause, the following new paragraph and new note:
For rated voltages of 1 100 kV and 1 200 kV the rated bus-transfer current for both air
insulated and gas insulated disconnectors shall be 80 % of the rated normal current, without
any upper limit.
NOTE 2 Rated bus-transfer currents greater than 80 % of the rated normal current may be assigned by the
manufacturer.
– 8 – 62271-102 Amend. 2 © IEC:2013

Table B.1 – Rated bus-transfer voltages for disconnectors

Add the following new lines to the existing Table B.1:

1 100
750 130
1 200
Table C.1 – Standardized values of rated induced currents and voltages for earthing

switches
Add the following new lines to the existing Table C.1:
1 100 110 440 5 65 7,5 50 20 40
1 200 110 440 5 65 7,5 50 20 40

Table C.2 – Standardized values of recovery voltages for electromagnetically induced
current breaking tests
Add the following new lines to the existing Table C.2:
1 100 5 11,3 750 65 145 2 400
1 200 5 11,3 750 65 145 2 400
Table C.3 – Test circuit capacitances (C1 values) for electrostatically induced current
making and breaking tests
Add the following new lines to the existing Table C.3:
1 100 0,8 2,63
1 200 0,8 2,63
Add the following new line at the end of the existing Table C.3:
– 1 100 kV to 1 200 kV: 290 Ω.

Table F.2 – Specified bus-charging currents
Add the following columns to the right of the existing Table F.2:
1 100 1 200
0,8 0,8
Add, after the existing Annex G introduced by Amendment 1, the following new Annex H:

62271-102 Amend. 2 © IEC:2013 – 9 –

Annex H
(normative)
Specific requirements for resistor fitted disconnector

in metal-enclosed gas insulated switchgear

H.1 General
H.1.1 Scope
This annex is applicable to resistor fitted disconnectors in metal-enclosed gas insulated
switchgear (GIS). The maximum VFTO (very fast transient overvoltage) in GIS systems with a
rated voltage of 800 kV and above may reach the insulation level of lightning impulse
withstand voltage in certain cases during switching of disconnectors. The purpose of fitting a
resistor is to mitigate the VFTO in such cases.
Three different types of resistor fitted disconnectors are given as examples in Figure H.1. The
resistor can be positioned in parallel or in series to the switching gap. In the arc-commutation
method the current is switched to the parallel resistor during an opening operation by
commutation of the arc from the main contact to the resistor contact.
NOTE Typically resistors of values 200 Ω to 1 000 Ω are used. The overvoltage damping factor depends on the
ratio of the resistance of the resistor and the system impedance.

Figure H.1 – Examples of resistor fitted disconnectors
H.1.2 Normative references
Subclause 1.2 of this standard is applicable.

H.2 Normal and special service conditions
Clause 2 of this standard is applicable.
H.3 Definitions
Clause 3 of this standard is applicable with the following modification:
Additional term and definition:
3.4.106
resistor fitted disconnector
disconnector fitted with resistor in series or in parallel to the switching contacts in order to
mitigate the VFTO during both opening and closing operation in metal-enclosed gas-insulated
switchgear
– 10 – 62271-102 Amend. 2 © IEC:2013

H.4 Ratings
Clause 4 of this standard is applicable.

H.5 Design and construction
Clause 5 of this standard is applicable with the following modification.

H.5.10 Nameplates
Addition:
The value of resistor, in Ohms, shall be given.
H.6 Type tests
Clause 6 of this standard is applicable with the following modifications.
Addition:
All type tests shall be carried out on the disconnector with the resistor fitted in the normal
position.
A measurement of ohmic value of the resistor shall be made before and after the following
type tests in order to ensure that the resistor integrity is still maintained:
– mechanical endurance test;
– bus-charging switching test;
– bus-transfer current switching test.
A visual inspection of the resistor shall be made after the type tests. No evidence of flashover
across the resistor or any mechanical damage shall be observed. It may be necessary to
disassemble the disconnector for the visual inspection.
The thermal capability of the resistor is verified during the bus-charging and/or the bus-
transfer current switching tests depending on the design of the disconnector. No additional
tests are considered necessary for verifying the thermal capability of the resistor.
NOTE Depending on the design a cooling period may be necessary between operations of bus-t
...