SIST EN 60038:2011/FprA2:2026 (Fragment 1)

• Status: Not Published
• Public Enquiry End Date: 22-Feb-2026
• ICS: 27.100 - Power stations in general
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: NTF - Electricity energy supply systems
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 21-Oct-2026
• Due Date: 09-Dec-2026
• Ref Project: EN 60038:2011/FprA2:2026 - Amendment 2 - IEC standard voltages

• Merged From: SIST EN 60038:2011/oprA2:2026 (Fragment 2) - Amendment 2 (Fragment 2) - Standard voltages for HVDC supply and HVDC equipment (Proposed horizontal standard)
• Effective Date: 08-Sep-2026
• Amends: SIST EN 60038:2011 - CENELEC standard voltages
• Effective Date: 19-Jul-2016

SIST EN 60038:2011/FprA2:2026 (Fragment 1) is the Slovenian draft amendment fragment for the standard on standard voltages for LVDC supply and LVDC equipment. It updates the voltage framework for AC and DC equipment below 120 V and for LVDC systems above 120 V up to 1500 V. The fragment is aimed at engineers, manufacturers and committees that need a common basis for specifying, selecting or reviewing LVDC voltages in safety- and EMC-related work.

What does SIST EN 60038:2011/FprA2:2026 (Fragment 1) specify?

SIST EN 60038:2011/FprA2:2026 (Fragment 1) proposes changes to the scope and to Clause 4 of EN 60038 so that it covers both low-voltage equipment and LVDC systems in a more explicit way. It also updates the tables that support voltage selection and adds a related technical report to the bibliography.

In practical terms, the fragment says the document applies to:

• AC and DC equipment below 120 V AC or DC, including batteries, other power supply devices, electrical equipment and appliances
• DC systems and equipment above 120 V and up to 1500 V

The technical content is organized around:

• Section 1 Scope
• Clause 4.6
• New Clause 4.7
• Table 6
• Table 7
• Bibliography

What are the key requirements of SIST EN 60038:2011/FprA2:2026 (Fragment 1)?

SIST EN 60038:2011/FprA2:2026 (Fragment 1) focuses on which nominal voltages are treated as standard values and how LVDC operating voltage ranges are described. The most important points are in Clause 4.6, new Clause 4.7, and Tables 6 and 7.

Equipment below 120 V AC or DC

Clause 4.6 is retitled to cover equipment with a nominal voltage below 120 V AC or DC. Table 6 then gives the standard preferred and supplementary nominal values for that equipment class.

For users, this means product specifications should be checked against the standard voltage list rather than being chosen ad hoc. The notes under Table 6 also matter in practice: very low cell voltages are not included, and additional voltages may still be needed for specific application areas.

LVDC systems above 120 V and up to 1500 V

New Clause 4.7 adds a framework for DC distribution and installation systems above 120 V and not exceeding 1500 V, together with related equipment. The clause explains that the operating voltage level of an LVDC system is tied to its energy balance and can be controlled in different ways.

This matters because system designers need to decide whether the voltage is self-controlled or controlled through a voltage source strategy. That choice affects how stable the system is expected to be and how voltage variation is handled in design and verification.

Application domains and voltage selection

Clause 4.7 separates LVDC use into two domains:

• installation domain - supply to end-user or production appliances
• distribution domain - high-power, long-distance pure distribution, excluding final circuits

The clause says the voltage ranges are optimized for the needs of these domains. Table 7 then gives the voltage selection basis for LVDC systems and related equipment, including minimum and maximum continuous operating voltages with full functionality.

In practice, this is the part a designer uses to check whether the planned system voltage fits the intended use case and whether the operating limits match the source and load conditions. The notes also allow for values to be adjusted in distribution applications to compensate for losses.

What terms does SIST EN 60038:2011/FprA2:2026 (Fragment 1) define?

• Low-voltage direct current (LVDC) - direct-current supply or equipment in the low-voltage range addressed by the amendment.
• Nominal voltage - the reference voltage used to group standard values for equipment and systems.
• Operating voltage level - the voltage level of an LVDC system in service, linked to its energy balance.
• Installation domain - the LVDC use case for supplying end-user or production appliances.
• Distribution domain - the LVDC use case for high-power, long-distance distribution, excluding final circuits.
• U2 - the minimum continuous operating voltage with full functionality in Table 7.
• U3 - the maximum continuous operating voltage in Table 7.

Who uses SIST EN 60038:2011/FprA2:2026 (Fragment 1)?

SIST EN 60038:2011/FprA2:2026 (Fragment 1) is used by system designers, equipment manufacturers, standards committees and safety or EMC specialists working with LVDC supply and equipment. It is relevant when they choose a nominal voltage, define operating limits, or align product and system specifications with a common voltage framework.

It is also useful for makers of batteries, power supply devices, electrical equipment and appliances, because the scope explicitly includes those application areas. Buyers and specifiers use it to compare designs against the standard voltage structure before setting requirements.

What changed in SIST EN 60038:2011/FprA2:2026 (Fragment 1) from the previous edition?

SIST EN 60038:2011/FprA2:2026 (Fragment 1) is an amendment fragment to EN 60038:2011. The fragment proposes these changes:

• rewrites the scope wording for AC and DC equipment below 120 V AC or DC
• adds a scope item for DC systems and equipment above 120 V and up to 1500 V
• retitles Clause 4.6 and updates Table 6 for equipment below 120 V AC or DC
• adds new Clause 4.7 for DC distribution and installation systems above 120 V and not exceeding 1500 V
• introduces Table 7 for LVDC systems and related equipment
• adds IEC TR 63282 to the bibliography

Which standards are used with SIST EN 60038:2011/FprA2:2026 (Fragment 1)?

Standard	What it contributes
IEC TR 63282: LVDC systems - Assessment of standard voltages and power quality requirements	Background information on standard voltages and power quality requirements for LVDC systems; Clause 4.7 points readers to it for additional information.

What does the SIST EN 60038:2011/FprA2:2026 (Fragment 1) document contain?

The fragment contains the revised scope wording, the updated equipment voltage clause, and the new LVDC system clause. It also includes Table 6 for standard equipment voltages and Table 7 for LVDC system operating voltage ranges.

The notes under Table 6 explain why very low cell voltages are not listed and why some applications may need additional voltages. The notes under Table 7 distinguish source and load conditions and allow for application-specific variation in distribution systems.

The bibliography is also updated with IEC TR 63282, which provides supporting information on LVDC standard voltages and power quality requirements.

SLOVENSKI STANDARD
SIST EN 60038:2011/oprA2:2026 (Fragment 1)
01-februar-2026
Standardne napetosti za nizkonapetostno enosmerno napajanje ali
nizkonapetostno enosmerno opremo (predlagan horizontalni standard) - Dopolnilo
A2 (fragment 1)
Amendment 2 (Fragment 1) - Standard voltages for LVDC supply and LVDC equipment
(Proposed horizontal standard)
Amendement 2
Ta slovenski standard je istoveten z: EN 60038:2011/prA2:2025 (Fragment 1)
ICS:
27.100 Elektrarne na splošno Power stations in general
SIST EN 60038:2011/oprA2:2026 en
(Fragment 1)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 60038:2011/oprA2:2026 (Fragment 1)

SIST EN 60038:2011/oprA2:2026 (Fragment 1)
8/1785/CDV
COMMITTEE DRAFT FOR VOTE (CDV)

PROJECT NUMBER:
IEC 60038/AMD2/FRAG1 ED7
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-12-05 2026-02-27
SUPERSEDES DOCUMENTS:
8/1753/CD, 8/1772/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 voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for Vote
(CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which t hey are
aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries” clau ses to
be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC c lauses.
(SEE AC/22/2007 OR NEW GUIDANCE DOC).
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions. You
may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without permission in
writing from IEC.
General
SIST EN 60038:2011/oprA2:2026 (Fragment 1)
TITLE:
Amendment 2 (Fragment 1) - Standard voltages for L
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