Testing methodology for wipers used in electrical insulating oil

This European Standard specifies testing procedures for fibrous wipers to be used with equipment normally containing electrical insulating oil. Such testing is necessary to rank commercial products, so that possible contamination of insulating oil and electrical equipment with fibres during maintenance operations may be minimized.

Prüfmethoden für Putzlappen, die für Isolieröl verwendet werden

Diese Europäische Norm legt Prüfbedingungen für faserhaltige Putzlappen fest, die in elektrischen Geräten verwendet werden, die üblicherweise Isolieröl enthalten. Eine solche Prüfung ist für die Einstufung handelsüblicher Produkte erforderlich, um eine mögliche Verunreinigung des Isolieröls und der elektrischen Geräte mit Fasern während Wartungsarbeiten zu minimieren.

Méthodologie d'essai des moyens de nettoyage utilisés dans les huiles isolantes à usages électriques

La présente Norme européenne spécifie les procédures d'essai pour les moyens de nettoyage fibreux qui sont à utiliser avec les matériels contenant normalement de l'huile isolante. Ces essais sont nécessaires pour classer les produits existant sur le marché, de manière à réduire la contamination possible de l'huile isolante et du matériel électrique par des fibres au cours des opérations de maintenance.

Testing methodology for wipers used in electrical insulating oil

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EN 50375:2004
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april 2004
Testing methodology for wipers used in electrical insulating oil
ICS 29.040.10 Referenčna številka
SIST EN 50375:2004(en)
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

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ICS 29.040.10

English version

Testing methodology for wipers
used in electrical insulating oil

Méthodologie d'essai des moyens de Prüfmethoden für Putzlappen,
nettoyage utilisés dans les huiles isolantes die für Isolieröl verwendet werden
à usages électriques

This European Standard was approved by CENELEC on 2002-03-05. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard 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 European Standard 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

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

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

© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 50375:2002 E

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EN 50375:2002 - 2 -

This European Standard has been prepared by CENELEC BTWG 99-1, Insulating oil.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by
CENELEC as EN 50375 on 2002-03-05.
The following dates were fixed:

- latest date by which the EN has to be implemented
 at national level by publication of an identical
 national standard or by endorsement (dop) 2003-03-01

- latest date by which the national standards conflicting
 with the EN have to be withdrawn (dow) 2005-03-01

Annexes designated "normative" are part of the body of the standard.
In this standard, annexes A, B, C, D and E are normative.
Warning: This European Standard calls for the use of substances and/or procedures that may
be injurious to health if adequate precautions are not taken. It refers only to technical suitability
and does not absolve the user from legal obligations relating to health and safety at any stage.

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– 3 – EN 50375:2002
Introduction. 4
1 Scope. 5
2 Normative references. 5
3 Terms and definitions . 5
4 Test methods. 6
4.1 Fibre release test (refer to annex A) . 6
4.2 Snagging test (refer to annex B). 6
4.3 Equilibrium moisture content (refer to annex C) . 6
4.4 Oil absorbency (refer to annex D and annex E) . 6
5 Test report. 7

Annex A (normative) Fibre release from wipers . 8
Annex B (normative) The snagging test. 12
Annex C (normative) Equilibrium moisture content of wipers.

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