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TB/T 2075.24-2026Parts and components for overhead contact system in electrified railway - Part 24: Preformed fittings (English PDF)

电气化铁路接触网零部件第24部分：预绞式金具

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Issued by

National Railway Administration

Level / Type

Industry · Recommended

Issue date

February 27, 2026

Implementation date

September 1, 2026

Scope

TB/T 2075.24-2026 is the English-translated version of 电气化铁路接触网零部件第24部分：预绞式金具.

This part of the TB/T 2075 series deals with preformed fittings, one of the parts and components used in the overhead contact system of electrified railways. Preformed fittings are shaped metal products applied to conductors and wires in the contact line equipment. The document is a product standard and sets out the requirements that apply to these fittings and how they are examined.

It serves manufacturers of contact system hardware, test laboratories, railway electrification contractors and the operators who buy and maintain traction power supply equipment. The standard is voluntary, as the code carries the /T mark. It was approved by the National Railway Administration, with technical oversight from the Traction Power Supply Subcommittee of the railway electrical equipment and systems standardization committee. It was issued on 27 February 2026 and takes effect on 1 September 2026. It replaces TB/T 2075.24-2020.

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Document preview — TB/T 2075.24-2026

National Standard of the People's Republic of China

ICS: 29.280
Classification: S82
Replacing: TB/T 2075.24-2020

Issued by: National Railway Administration

Foreword
1 Scope
2 Normative references
3 Terms and definitions

Foreword

TB/T 2075.24-2026 is a recommended industry standard of the People's Republic of China in the Railway sector, approved and issued by the National Railway Administration on 27 February 2026, with effect from 1 September 2026.

This edition replaces TB/T 2075.24-2020.

It is administered by the Railway Industry Technical Committee for Standardization of Electrical Equipment and Systems, Traction Power Supply Subcommittee.

Classification: ICS 29.280; CCS S82.

1 Scope

Remaining clauses in the full document

2 Normative references
3 Terms and definitions

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 48 pages — is available in the English PDF.

Editions of TB/T 2075.24

Edition	Title	Revision	Status
TB/T 2075.24-2026	Parts and components for overhead contact system in electrified railway - Part 24: Preformed fittings	current edition	Current
TB/T 2075.24-2020	Parts and components for overhead contact system in electrified railway - Part 24: Preformed fittings	previous edition	In force until 1 September 2026

This page sells the current edition, TB/T 2075.24-2026. Earlier editions are listed for reference only.

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