IEC 60071-1:2006/AMD1:2010
(Amendment)Amendment 1 - Insulation co-ordination - Part 1: Definitions, principles and rules
Amendment 1 - Insulation co-ordination - Part 1: Definitions, principles and rules
Gives guidance on the protection of overvoltage issues for both stand-alone and grid-connected photovoltaic power generating systems.
Amendement 1 - Coordination de l'isolement - Partie 1: Définitions, principes et règles
Sert de guide pour la protection contre les surtensions des syst�mes photovolta�ques de production d'�nergie, aussi bien les syst�mes isol�s que ceux raccord�s au r�seau de distribution.
General Information
- Status
- Published
- Publication Date
- 13-Jan-2010
- Technical Committee
- TC 28 - Insulation co-ordination
- Current Stage
- DELPUB - Deleted Publication
- Start Date
- 08-Aug-2019
- Completion Date
- 26-Oct-2025
Relations
- Effective Date
- 05-Sep-2023
- Effective Date
- 05-Sep-2023
Overview
IEC 60071-1:2006/AMD1:2010 is an important amendment to the international standard on Insulation Co-ordination developed by the International Electrotechnical Commission (IEC). This Part 1 Amendment focuses on definitions, principles, and rules related to the coordination of electrical insulation. It provides essential updates and clarifications for ensuring reliable protection against overvoltage phenomena in electrical systems. Importantly, this standard includes guidance tailored to both stand-alone and grid-connected photovoltaic (PV) power generating systems, making it highly relevant for modern renewable energy installations.
The amendment revises critical parameters such as standard rated withstand voltages for power-frequency and impulse conditions, and air clearance values, thereby helping engineers design and evaluate electrical insulation systems to withstand surges and transient overvoltages.
Key Topics
Definitions and Principles of Insulation Coordination
The amendment clarifies essential terminology used in insulation coordination enabling consistent interpretation and application of the standard.Standard Rated Withstand Voltages
Lists updated root-mean-square (r.m.s.) and peak values of withstand voltages relevant to power-frequency and impulse surges, including newly proposed higher voltage levels under consideration.Air Clearance Requirements
Specifies updated minimum air clearance distances for different insulation levels and configurations, including rod and conductor structures. This ensures adequate phase-to-earth and phase-to-phase separation to prevent flashovers under surge conditions.Longitudinal and Phase-to-Phase Insulation Levels
Introduces detailed tables outlining the correlation between rated switching impulse withstand voltages and standardized insulation clearances, vital for high voltage equipment design.Photovoltaic System Protection
The amendment’s scope explicitly addresses overvoltage protection requirements for PV power generating systems, emphasizing their increasing integration into electrical grids and the necessity for reliable insulation coordination.
Applications
Power System Design and Safety
Utilized by electrical engineers to select and verify insulation levels that prevent insulation failure due to transient overvoltages such as lightning or switching surges.Photovoltaic Power Systems
Applies to both stand-alone and grid-connected PV installations to ensure effective insulation co-ordination, minimizing risk of damage and interruptions in renewable energy applications.High Voltage Equipment Manufacturing
Guides manufacturers in defining equipment insulation parameters that align with internationally recognized standards, aiding in the consistent production of electrical devices able to withstand expected voltage stresses.Maintenance and Testing
Provides reference voltage withstand values and clearance distances used during routine testing and maintenance of electrical infrastructures to verify correct insulation performance.Standards Compliance and Certification
Supports utilities, regulators, and certification bodies in assessing compliance of electrical installations and components with established insulation coordination requirements.
Related Standards
IEC 60071 Series
The broader IEC 60071 series addresses insulation coordination comprehensively, with Part 1 focusing on definitions and principles. Other parts cover application guidelines and testing methods.IEC 60038
Covers standard voltages and complements the insulation coordination standard by providing preferred voltage levels referenced in the amendment.IEC 61730
Addresses PV module safety requirements, including insulation and electrical protection, relevant when applying IEC 60071-1 to photovoltaic systems.IEC 60364
Pertains to electrical installations of buildings and includes fundamental requirements on insulation and overvoltage protection at system design level.International Electrotechnical Vocabulary (Electropedia)
For precise definitions and terminologies, the IEC Electropedia offers a valuable resource in line with the definitions established in this standard.
By following the updated guidelines within IEC 60071-1:2006/AMD1:2010, electrical professionals can enhance the safety, durability, and reliability of electrical insulation systems, particularly in emerging photovoltaic power applications. The standard supports the integration of renewable energy systems into electrical networks with improved protection against overvoltage stresses, aligning with global trends toward sustainable and resilient power infrastructures.
Frequently Asked Questions
IEC 60071-1:2006/AMD1:2010 is a standard published by the International Electrotechnical Commission (IEC). Its full title is "Amendment 1 - Insulation co-ordination - Part 1: Definitions, principles and rules". This standard covers: Gives guidance on the protection of overvoltage issues for both stand-alone and grid-connected photovoltaic power generating systems.
Gives guidance on the protection of overvoltage issues for both stand-alone and grid-connected photovoltaic power generating systems.
IEC 60071-1:2006/AMD1:2010 is classified under the following ICS (International Classification for Standards) categories: 27.160 - Solar energy engineering; 29.080.30 - Insulation systems. The ICS classification helps identify the subject area and facilitates finding related standards.
IEC 60071-1:2006/AMD1:2010 has the following relationships with other standards: It is inter standard links to IEC 60071-1:2006, IEC 60071-1:2019. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
IEC 60071-1:2006/AMD1:2010 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
IEC 60071-1 ®
Edition 8.0 2010-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Insulation co-ordination –
Part 1: Definitions, principles and rules
Coordination de l'isolement –
Partie 1: Définitions, principes et règles
IEC 60071-1:2006/A1:2010
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IEC 60071-1 ®
Edition 8.0 2010-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Insulation co-ordination –
Part 1: Definitions, principles and rules
Coordination de l'isolement –
Partie 1: Définitions, principes et règles
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
G
CODE PRIX
ICS 29.080.30 ISBN 978-2-88910-040-8
– 2 – 60071-1 Amend. 1 © IEC:2010
FOREWORD
This amendment has been prepared by IEC technical committee 28: Insulation co-ordination.
The text of this amendment is based on the following documents:
FDIS Report on voting
28/198A/FDIS 28/201/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.
_____________
5.6 List of standard rated short-duration power-frequency withstand voltages
Replace the existing text by the following new text:
The following r.m.s. values, expressed in kV, are standardized as withstand voltages: 10, 20,
28, 38, 50, 70, 95, 115, 140, 185, 230, 275, 325, 360, 395, 460, 510, 570, 630, 680.
The following r.m.s. values, expressed in kV, are under consideration as withstand voltages:
710, 790, 830, 880, 960, 975, 1 050, 1 100, 1 200.
5.7 List of standard rated impulse withstand voltages
Replace the existing text by the following new text:
The following peak values, expressed in kV, are standardized as withstand voltages: 20, 40,
60, 75, 95, 125, 145, 170, 200, 250, 325, 380, 450, 550, 650, 750, 850, 950, 1 050, 1 175,
1 300, 1 425, 1 550, 1 675, 1 800, 1 950, 2 100, 2 250, 2 400, 2 550, 2 700, 2 900, 3 100.
60071-1 Amend. 1 © IEC:2010 – 3 –
Table 3 – Standard insulation levels for range II (U > 245 kV)
m
Replace the existing Table 3 by the following new Table 3:
Standard rated switching impulse withstand voltage
Highest Standard rated
voltage for lightning impulse
Longitudinal Phase-to-earth Phase-to-phase
equipment withstand
a
b
insulation
U voltage
m
(ratio to the
kV kV kV phase-to-earth kV
(peak value) (peak value) peak value)
(r.m.s. value) (peak value)
750 750 1,50
c
750 850 1,50
1 050
850 850 1,50
1 050
1 050
850 950 1,50
1 175
1 050
850 850 1,60
1 175
1 175
420 950 950 1,50
1 300
1 300
950 1050 1,50
1 425
1 175
950 950 1,70
1 300
1 300
550 950 1 050 1,60
1 425
950 1 425
1 175 1,50
1 050 1 550
1 675
1 175 1 300 1,70
1 800
1 800
800 1 175 1 425 1,70
1 950
1 175 1 950
1 550 1,60
1 300
2 100
1 950
d
1 425
– –
2 100
2 100
1 425 1 550 1,70
2 250
1 100
2 250
1 550 1 675 1,65
2 400
2 400
1 675 1 800 1,6
2 550
– 4 – 60071-1 Amend. 1 © IEC:2010
Standard rated switching impulse withstand voltage
Highest Standard rated
voltage for lightning impulse
Longitudinal Phase-to-earth Phase-to-phase
equipment withstand
a
b
insulation
U voltage
m
(ratio to the
kV kV kV phase-to-earth kV
(peak value) (peak value) peak value)
(r.m.s. value) (peak value)
2 100
1 550 1 675 1,70
2 250
2 250
1 200 1 675 1 800 1,65
2 400
2 550
1 800 1 950 1,60
2 700
a
Value of the impulse voltage component of the relevant combined test while the peak value of the
power-frequency component of opposite polarity is U × √2 / √3.
m
b
These values apply as for phase-to-earth and phase-to-phase insulation as well; for longitudinal
insulation they apply as the standard rated lightning impulse component of the combined standard
rated withstand voltage, while the peak value of the power-frequency component of opposite
polarity is 0,7 × U × √2 / √3.
m
c
This U is a non-preferred value in IEC 60038.
m
d
This value is only applicable to the phase-to-earth insulation of single phase equipment not
exposed to air.
60071-1 Amend. 1 © IEC:2010 – 5 –
Table A.1 – Correlation between standard rated lightning impulse withstand voltages
and minimum air clearances
Replace Table A.1 by the following new Table A.1:
Standard rated lightning impulse Minimum clearance
withstand voltage mm
kV Rod-structure Conductor-structure
20 60
40 60
60 90
75 120
95 160
125 220
145 270
170 320
200 380
250 480
325 630
380 750
450 900
550 1 100
650 1 300
750 1 500
850 1 700 1 600
950 1 900 1 700
1 050 2 100 1 900
1 175 2 350 2 200
1 300 2 600 2 400
...
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