EN 60038:2011/prA2:2025 (Fragment 2)
(Amendment)Amendment 2 (Fragment 2) - Standard voltages for HVDC supply and HVDC equipment (Proposed horizontal standard)
Amendment 2 (Fragment 2) - Standard voltages for HVDC supply and HVDC equipment (Proposed horizontal standard)
Tensions normales de la cei
Standardne napetosti za visokonapetostno enosmerno napajanje ali visokonapetostno enosmerno opremo (predlagani horizontalni standard) - Dopolnilo A2 (fragment 2)
General Information
- Status
- Not Published
- Publication Date
- 27-Jun-2027
- Technical Committee
- CLC/TC 8X - System aspects of electrical energy supply
- Drafting Committee
- IEC/TC 8 - IEC_TC_8
- Current Stage
- 4060 - Enquiry results established and sent to TC, SR, BTTF - Enquiry
- Start Date
- 27-Feb-2026
- Completion Date
- 27-Feb-2026
Relations
- Effective Date
- 08-Feb-2022
Overview
EN 60038:2011/prA2:2025 (Fragment 2) provides an important amendment for setting standard voltages used in high-voltage direct current (HVDC) supply systems and HVDC equipment. Coordinated under the CENELEC (CLC) and IEC technical committees, this proposed horizontal standard supports harmonization of nominal voltage values for HVDC transmission and distribution networks above 1500 V. By offering clear voltage levels, it promotes safe, compatible, and efficient design and operation of HVDC systems and equipment across multiple sectors.
Key Topics
- Standardization of HVDC Voltage Values: Establishes nominal voltages (pole-to-earth) for DC systems above 1.5 kV, ensuring consistency in electrical infrastructure.
- Scope Expansion: Amendment broadens applicability to transmission and distribution systems with nominal voltages exceeding 1500 V.
- Recommended Voltage Series: Provides a table of preferred nominal voltages ranging from 3 kV to 800 kV and above, serving as reference for HVDC system design.
- Application Guidance: Offers specific instructions on the selection and use of standardized DC voltages, with distinctions for grid vs. stand-alone systems.
- International Alignment: Recognizes the existence of different national standard voltages, encouraging harmonization wherever feasible.
- Technical Considerations: Highlights key parameters, such as measurement tolerances and influences (e.g., harmonics, ripples), on nominal system voltages.
Applications
The amendment for standard voltages in HVDC supply and HVDC equipment is practically relevant in various energy and infrastructure projects, including:
- HVDC Transmission Projects: Defines voltage options for new and existing point-to-point and grid-connected HVDC transmission lines.
- Energy Grid Operators: Facilitates planning and upgrade of national and regional power grids involving HVDC technologies.
- Equipment Design and Procurement: Helps manufacturers and procurers select HVDC equipment compatible with globally recognized voltage values.
- Project Standardization and Safety: Reduces risk of incompatibility, increases operational reliability, and assists in regulatory compliance for large-scale energy systems.
- UHVDC (Ultra High-Voltage DC) Systems: Provides guidance for systems operating at or above 800 kV, supporting the most advanced power transmission corridors.
Adopting these standardized voltages enables seamless integration and interoperability across borders, streamlines engineering efforts, and contributes to lowering lifecycle costs through volume manufacturing and simplified maintenance.
Related Standards
For cohesive application in the field of HVDC energy supply, consider these linked and referenced standards:
- IEC 60038: Base standard for standard voltages (AC and DC) - critical for alignment with Amendment 2.
- IEC TS 63471: Technical specification devoted to DC voltages for HVDC grids, referenced in the amendment’s bibliography.
- Electromagnetic Compatibility and Safety Standards: Aspects identified as integral for HVDC system operations.
- CENELEC Parallel Standards: Ongoing harmonization within European and International committees, ensuring continued alignment.
Stakeholders in HVDC transmission, grid planning, and equipment manufacturing are advised to review related standards to ensure comprehensive compliance and up-to-date engineering practices.
Keywords: HVDC standard voltages, EN 60038:2011/prA2:2025, HVDC equipment, nominal voltage, high-voltage direct current, HVDC transmission, UHVDC, CLC standards, power system harmonization, electrical infrastructure, IEC standardization.
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Frequently Asked Questions
EN 60038:2011/prA2:2025 (Fragment 2) is a draft published by CLC. Its full title is "Amendment 2 (Fragment 2) - Standard voltages for HVDC supply and HVDC equipment (Proposed horizontal standard)". This standard covers: Amendment 2 (Fragment 2) - Standard voltages for HVDC supply and HVDC equipment (Proposed horizontal standard)
Amendment 2 (Fragment 2) - Standard voltages for HVDC supply and HVDC equipment (Proposed horizontal standard)
EN 60038:2011/prA2:2025 (Fragment 2) is classified under the following ICS (International Classification for Standards) categories: 29.020 - Electrical engineering in general. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 60038:2011/prA2:2025 (Fragment 2) has the following relationships with other standards: It is inter standard links to EN 60038:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 60038:2011/prA2:2025 (Fragment 2) 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)
SLOVENSKI STANDARD
01-februar-2026
Standardne napetosti za visokonapetostno enosmerno napajanje ali
visokonapetostno enosmerno opremo (predlagan horizontalni standard) -
Dopolnilo A2 (fragment 2)
Amendment 2 (Fragment 2) - Standard voltages for HVDC supply and HVDC equipment
(Proposed horizontal standard)
Tensions normales de la cei
Ta slovenski standard je istoveten z: EN 60038:2011/prA2:2025 (Fragment 2)
ICS:
27.100 Elektrarne na splošno Power stations in general
SIST EN 60038:2011/oprA2:2026 en
(Fragment 2)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
8/1777/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60038/AMD2/FRAG2 ED7
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-12-05 2026-02-27
SUPERSEDES DOCUMENTS:
8/1752/CD, 8/1773/CC
IEC TC 8 : SYSTEM ASPECTS OF ELECTRICAL ENERGY SUPPLY
SECRETARIAT: SECRETARY:
Italy Mr Christian Noce
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 1,TC 2,TC 3,SC 3C,SC 3D,TC 4,TC 5,TC 7,SC 8A,SC TC 8 Horizontal Basic
8B,SC 8C,TC 9,TC 10,TC 11,TC 13,TC 14,TC 15,TC 17,SC
17A,SC 17C,TC 18,SC 18A,TC 20,TC 21,SC 21A,TC 22,SC
22E,SC 22F,SC 22G,SC 22H,TC 23,SC 23A,SC 23B,SC
23E,SC 23G,SC 23H,SC 23J,SC 23K,TC 25,TC 26,TC 27,TC
29,TC 31,SC 31G,SC 31J,SC 31M,TC 32,SC 32A,SC 32B,SC
32C,TC 33,TC 34,SC 34A,SC 34B,SC 34C,SC 34D,TC 35,TC
36,SC 36A,TC 37,SC 37A,SC 37B,TC 38,TC 40,TC 42,TC
44,TC 45,SC 45A,SC 45B,TC 46,SC 46A,SC 46C,SC 46F,TC
47,SC 47A,SC 47D,SC 47E,SC 47F,TC 48,SC 48B,SC 48D,TC
49,TC 51,TC 55,TC 56,TC 57,TC 59,SC 59A,SC 59C,SC
59D,SC 59F,SC 59K,SC 59L,SC 59M,SC 59N,TC 61,SC
61B,SC 61C,SC 61D,SC 61H,SC 61J,TC 62,SC 62A,SC
62B,SC 62C,SC 62D,TC 64,TC 65,SC 65A,SC 65B,SC 65C,SC
65E,TC 66,TC 68,TC 69,TC 70,TC 72,TC 73,TC 76,TC 77,SC
77A,SC 77B,SC 77C,TC 78,TC 79,TC 80,TC 81,TC 82,TC
85,TC 86,SC 86A,SC 86B,SC 86C,TC 87,TC 88,TC 89,TC
90,TC 91,TC 94,TC 95,TC 96,TC 97,TC 99,TC 100,TA 1,TA
2,TA 4,TA 5,TA 6,TA 15,TA 16,TA 17,TA 18,TA 19,TA 20,TC
101,TC 103,TC 104,TC 105,TC 106,TC 107,TC 108,TC 109,TC
110,TC 111,TC 112,TC 113,TC 114,TC 115,TC 116,TC 117,PC
118,TC 119,TC 120,TC 121,SC 121A,SC 121B,TC 122,TC
123,TC 124,TC 125,PC 126,PC 127,PC 128,TC
129,CISPR,CIS/A,CIS/B,CIS/D,CIS/F,CIS/H,CIS/I,CIS/S,ACEA,
ACEC,ACEE,ACOS,ACSEC,ACTAD,SyC AAL,SyC COMM,SyC
LVDC,SyC SM,SyC Smart Cities,SyC Smart Energy,SEG
11,SEG 12,SEG 13,SEG 14,ISO/IEC JTC 1/SC 25,ISO/IEC
JTC 1/SC 41,ISO/IEC JTC 1/SC 43
ASPECTS CONCERNED:
Electromagnetic Compatibility,Safety
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel
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