Power transformer and reactor fittings - Part 5: Liquid level, pressure and flow indicators, pressure relief devices and dehydrating breathers

Supersedes EN 50216-5:2002/A1:2002
2021: CLC legacy converted by DCLab NISOSTS

Zubehör für Transformatoren und Drosselspulen - Teil 5: Flüssigkeitsstandanzeiger, Druckanzeigeeinrichtungen und Durchflussmesser, Druckentlastungsventile und Luftentfeuchter

Accessoires pour transformateurs de puissance et bobines d'inductance - Partie 5: Indicateurs de niveau de liquide isolant, manomètres et indicateurs de circulation de liquide isolant, soupapes de sûreté et assécheurs d'air

Pribor za močnostne transformatorje in dušilke - 5. del: Kazala nivoja tekočine, tlačne naprave in kazala pretoka

General Information

Status
Published
Publication Date
10-Oct-2006
Technical Committee
CLC/TC 14 - Power transformers
Drafting Committee
IEC/TC 14 - IEC_TC_14
Parallel Committee
IEC/TC 14 - IEC_TC_14
Current Stage
6060 - Document made available - Publishing
Start Date
01-Sep-2006
Due Date
01-Oct-2006
Completion Date
11-Oct-2006

Relations

Effective Date
07-Jun-2022
Effective Date
16-Mar-2021
Effective Date
16-Mar-2021
Effective Date
21-Sep-2010
Effective Date
21-Sep-2010

Overview

EN 50216-5:2002/A3:2006 (CLC / CENELEC) is an amendment to the European standard for power transformer and reactor fittings, Part 5: Liquid level, pressure and flow indicators, pressure relief devices and dehydrating breathers. Approved 2006-09-01, this amendment supersedes EN 50216-5:2002/A1:2002 and updates technical requirements, tests and dimensional guidance to ensure interchangeability and reliable performance of transformer fittings.

Key topics and requirements

  • Scope: Covers design and specification requirements for fittings used on liquid-filled power transformers and reactors, specifically:
    • Liquid level indicators
    • Pressure indicators
    • Flow indicators
    • Pressure relief devices (safety valves)
    • Dehydrating breathers (silica-gel breathers)
  • Electrical contact performance (NO and NC):
    • 24 V d.c. to 220 V d.c.: uninterrupted current 2 A; interrupted (breaking) current 100 mA with L/R < 40 ms
    • 230 V a.c.: 2 A uninterrupted and 2 A interrupted (cos φ > 0.5)
    • Minimum contact life: 1 000 operations
    • For 24 V d.c. systems with making capacity up to 0.5 VA, switches must be able to make low current down to 10 mA after one year of non-operation
  • Testing:
    • Type test: verify correct operating pressure value under oil overpressure (detailed procedures are under consideration)
    • Routine tests: operational tests with compressed air per clause 6.4 to check operation at set pressure, optical signals and electric contacts (for devices from specified figures); optional leakage test can be agreed between purchaser and supplier
  • Dehydrating breathers:
    • Defines overall dimensions and pipe connections to guarantee interchangeability of conventional breathers with equivalent dehydrating characteristics
    • Excludes self-regenerating breathers
    • Typical size classes (Table 8) and guidance: for shorter maintenance cycles, half the suggested silica-gel quantity may be used
    • Flange and mounting updates: modified Figures 4–7 and addition of Figure 8 (small 2H flange) for breathers up to 1 kg silica-gel capacity

Applications and users

  • Primary users: transformer and reactor manufacturers, electrical OEMs, utilities, maintenance contractors, procurement/specification engineers and testing laboratories
  • Practical uses:
    • Specifying compliant fittings for new transformer designs
    • Interchangeability and spare-part selection for site maintenance
    • Defining acceptance and routine test procedures for factory and on-site commissioning
    • Ensuring safety via standardized pressure relief and breather interfaces

Related standards

  • Part of the EN 50216 series for transformer fittings; prepared by CENELEC TC 14 (Power transformers). Implement by national adoption (dop 2007-09-01; dow 2009-09-01).

Keywords: EN 50216-5:2002/A3:2006, power transformer fittings, liquid level indicators, pressure relief devices, dehydrating breathers, flow indicators, silica-gel breathers, CENELEC.

Amendment

EN 50216-5:2002/A3:2007

English language
5 pages
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Frequently Asked Questions

EN 50216-5:2002/A3:2006 is a amendment published by CLC. Its full title is "Power transformer and reactor fittings - Part 5: Liquid level, pressure and flow indicators, pressure relief devices and dehydrating breathers". This standard covers: Supersedes EN 50216-5:2002/A1:2002 2021: CLC legacy converted by DCLab NISOSTS

Supersedes EN 50216-5:2002/A1:2002 2021: CLC legacy converted by DCLab NISOSTS

EN 50216-5:2002/A3:2006 is classified under the following ICS (International Classification for Standards) categories: 29.180 - Transformers. Reactors. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 50216-5:2002/A3:2006 has the following relationships with other standards: It is inter standard links to EN 50216-5:2002/A1:2002, EN IEC 60076-22-1:2019, EN IEC 60076-22-7:2020, EN 50216-5:2002, EN 50216-5:2002/A1:2002. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN 50216-5:2002/A3:2006 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.

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EUROPEAN STANDARD
EN 50216-5/A3
NORME EUROPÉENNE
October 2006
EUROPÄISCHE NORM
ICS 29.180 Supersedes EN 50216-5:2002/A1:2002

English version
Power transformer and reactor fittings
Part 5: Liquid level, pressure and flow indicators,
pressure relief devices and dehydrating breathers

Accessoires pour transformateurs  Zubehör für Transformatoren
de puissance et bobines d'inductance und Drosselspulen
Partie 5: Indicateurs de niveau de liquide Teil 5: Flüssigkeitsstandanzeiger,
isolant, manomètres et indicateurs Druckanzeigeeinrichtungen
de circulation de liquide isolant, und Durchflussmesser,
soupapes de sûreté et assécheurs d'air Druckentlastungsventile
und Luftentfeuchter
This amendment A3 modifies the European Standard EN 50216-5:2002; it was approved by CENELEC on
2006-09-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This amendment exists in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CENELEC member into its own language and notified to the
Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50216-5:2002/A3:2006 E

Foreword
This amendment to the European Standard EN 50216-5:2002 was prepared by the Technical
Committee CENELEC TC 14, Power transformers.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by
CENELEC as amendment A3 to EN 50216-5:2002 on 2006-09-01.
This amendment supersedes EN 50216-5:2002/A1:2002.
The following dates were fixed:
– latest date by which the amendment has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2007-09-01
– latest date by which the national standards conflicting
with the amendment have to be withdrawn (dow) 2009-09-01
__________
- 3 - EN 50216-5:2002/A3:2006
3.2.3 Breaking and making capacity
Replace Table 1 and text by the following:

Table 1 – Breaking and making capacity (NO and NC contacts)
Voltage Uninterrupted current Interrupted current
(making capacity)
(breaking capacity)
24 V d.c. to 220 V d.c. 2 A 100 mA L/R < 40 ms
230 V a.c. 2 A 2 A
cos ϕ > 0,5
Other values may be agreed between purc
...

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