BS EN 50708-2-1-2020 PDF

Full title and description

STB BS EN 50708-2-1:2020 — Power transformers. Additional European requirements — Part 2-1: Medium power transformer — General requirements. This document specifies supplementary European requirements that apply to medium power transformers in addition to the relevant IEC/EN transformer standards and national adoptions (BS EN designation indicates the British adoption of the EN text).

Abstract

This standard (EN 50708-2-1:2020, published as BS EN 50708-2-1:2020 for the UK market) defines general requirements and additional European provisions for medium power transformers, addressing ratings, service conditions, general design aspects, tests and documentation that supplement the common part of the EN 50708 series and core IEC/EN transformer standards. It is intended to harmonize supplier and purchaser expectations for medium power transformers placed on the European market.

General information

• Status: Valid / Current (EN adoption in national bodies; the document is published and in force as part of the EN 50708 series).
• Publication date: 2020 (EN publication 28 May 2020; BSI national designation shown 24 Dec 2020 in some catalogues — users should note national catalogue dates may differ from the EN issuance date).
• Publisher: British Standards Institution (BSI) for the BS EN publication; original European Norm published under the EN/CENELEC system (adopted by national bodies).
• ICS / categories: 29.180 — Transformers, reactors.
• Edition / version: 2020 (first edition as part of the EN 50708 series adoptions).
• Number of pages: Typically published as 18 pages in the BS/EN release (national copies may show small pagination differences).

Scope

This part (2-1) of EN 50708 is one element of the EN 50708 series that provides additional European requirements for medium power transformers (typically those within the medium-power range defined by EN/Commission regulations), and it is intended to be used in conjunction with the common part (EN 50708‑1‑1) and the core transformer standards such as EN/IEC 60076. The scope covers general requirements, ratings, service conditions, tests and documentation that complement the common part and ensure consistent application of European requirements for medium power transformers.

Key topics and requirements

• Definitions and normative references linking this part to the common EN 50708‑1‑1 and IEC/EN 60076 family.
• Service conditions and environmental considerations specific to medium power transformers.
• Ratings, nameplate information and tolerances expected for medium power transformers supplied in Europe.
• General design and construction provisions that supplement the common part (materials, cooling, tapping arrangements, insulation, accessories).
• Required tests (routine and type tests) and documentation to demonstrate conformity with the EN 50708 additional European requirements.
• Requirements for accessories and fittings commonly associated with medium power transformers (addressed further in other parts of EN 50708 series where applicable).

Typical use and users

Manufacturers, testing laboratories, specifiers, utilities, distribution companies, procurement teams and conformity assessment bodies involved with design, manufacture, procurement, testing and acceptance of medium power transformers for deployment in European markets. Also used by compliance officers and engineers ensuring products meet European additional requirements and by national standards bodies when adopting or referencing the EN text.

Related standards

EN 50708‑1‑1 (Common part — General requirements), EN/IEC 60076 series (power transformers), other parts of the EN 50708 series covering accessories, special tests and large/medium power transformer specific provisions (e.g., EN 50708‑2‑3, EN 50708‑2‑4, EN 50708‑3‑1, EN 50708‑3‑3). This part replaces or updates provisions formerly covered in standards such as EN 50588‑1 and EN 50629 for the respective transformer classes.

Keywords

Power transformer; medium power transformer; EN 50708; BS EN 50708-2-1:2020; additional European requirements; transformer tests; transformer ratings; IEC 60076; accessories; nameplate; service conditions.

FAQ

Q: What is this standard?

A: It is Part 2-1 of the EN 50708 series — a European standard (adopted nationally as BS EN 50708-2-1:2020) that sets out additional European requirements and general provisions specifically for medium power transformers.

Q: What does it cover?

A: It covers general requirements that supplement the common part and the core IEC/EN transformer standards: ratings, service conditions, general design requirements, tests and documentation for medium power transformers placed on the European market.

Q: Who typically uses it?

A: Transformer manufacturers, test houses, utilities, procurement/specification engineers, and conformity assessment bodies who need to design, supply, test or verify medium power transformers for European use.

Q: Is it current or superseded?

A: The 2020 edition is current/valid as the EN 50708 series element for medium power transformers. National catalogue listing dates vary (for example national publication/adoption dates shown in some catalogues); users should check their national standards body for the national adoption date and any corrigenda or amendments.

Q: Is it part of a series?

A: Yes — it is one part of the EN 50708 family (which includes common parts and parts for medium and large power transformers, accessories and special tests). See EN 50708‑1‑1 for the common part and other numbered parts for accessory and test provisions.

Q: What are the key keywords?

A: Medium power transformer, additional European requirements, EN 50708, BS EN, power transformer tests, ratings, accessories, IEC 60076.