BS EN 61033-2006 PDF

Full title and description

BS EN 61033:2006 — Test methods for the determination of bond strength of impregnating agents to an enamelled wire substrate. This standard (EN 61033:2006, based on IEC 61033:1991 with Amendment A1:2006) specifies laboratory test methods used to measure how well varnishes and impregnation resins adhere to enamelled wire used in electrical windings.

Abstract

Describes three established test procedures (twisted coil test, helical coil test and wire bundle test) for determining the bond strength of solvent-based varnishes and solventless resins to enamelled wire substrates. The procedures cover sample preparation, test execution and measurement of the force required to produce coating failure, including consideration of curing, test temperature and thermal ageing effects.

General information

• Status: Current (European adoption EN 61033:2006; British adoption BS EN 61033:2006).
• Publication date: EN published December 2006 (EN 61033:2006); BS adoption published 31 January 2007 (BS EN 61033:2006).
• Publisher: European Committee for Standardization (Electrotechnical sector) / national adoption published by BSI as BS EN 61033:2006.
• ICS / categories: 17.220.99 (other standards related to electricity and magnetism); 29.035.01 (insulating materials).
• Edition / version: EN 61033:2006 (incorporates IEC 61033:1991 + A1:2006); published nationally as BS EN 61033:2006.
• Number of pages: Typically published at about 20 pages for the BS/EN edition.

Scope

Specifies three laboratory test methods to determine the bond strength of impregnating agents (for example solvent-based varnishes and solventless resins) to an enamelled wire substrate used in electrical windings. The standard defines specimen preparation, test arrangements (twisted coil, helical coil and wire bundle), test conditions, measurement of applied force and reporting requirements. It is intended for use where the adhesion of impregnation systems to enamelled wire affects performance or reliability of electrical windings.

Key topics and requirements

• Three principal test methods: Method A — twisted coil test; Method B — helical coil test; Method C — wire bundle test.
• Specimen preparation and selection of representative enamelled wire types and diameters.
• Conditions affecting bond strength: curing/degree of cure, test temperature, thermal ageing and choice of impregnating system.
• Measurement and reporting of the force/load at which coating failure occurs, and the required test instrumentation and calibration.
• Normative references and annex mapping to international publications (annex ZA references to corresponding international documents).

Typical use and users

Used by material suppliers (varnish and resin manufacturers), winding manufacturers (motors, transformers, coils), independent test laboratories and quality/assurance teams to assess adhesion performance of impregnation systems and to compare materials or production processes. Also used during R&D when developing new insulating systems or qualifying wire–coating combinations.

Related standards

IEC 61033 (base international standard and amendment IEC 61033:1991 + A1:2006); related test-method standards for insulating materials and resin-based compounds (for example standards in the IEC/EN 60455 series and other insulation material test standards). National adoptions (BS EN, DIN EN, etc.) contain the identical technical content with national forewords or implementation dates.

Keywords

bond strength, impregnating agents, varnish adhesion, enamelled wire, twisted coil test, helical coil test, wire bundle test, insulation testing, EN 61033, BS EN 61033

FAQ

Q: What is this standard?

A: A European/British standard (EN/BS EN 61033:2006) specifying test methods to measure how well impregnation varnishes and resins adhere to enamelled wire used in electrical windings.

Q: What does it cover?

A: It covers three laboratory test procedures (twisted coil, helical coil and wire bundle) including specimen preparation, test conditions, measurement of force at failure and reporting requirements for bond-strength evaluation.

Q: Who typically uses it?

A: Winding manufacturers (motors, transformers, coils), varnish/resin suppliers, test laboratories, R&D teams and quality assurance departments concerned with electrical insulation adhesion.

Q: Is it current or superseded?

A: EN 61033:2006 / BS EN 61033:2006 is published and listed as the 2006 edition for these test methods; available national adoptions (BS, DIN, etc.) reflect the same technical content. Users should check their national standards body (for example BSI in the UK) for any later withdrawal or supersession notices before using the standard for regulatory or procurement purposes.

Q: Is it part of a series?

A: It is the designated document number 61033 in the IEC/EN series of test-method standards for insulation materials and is associated with other insulation and resin test standards (for example standards in the IEC/EN 60455 family and related material testing documents).

Q: What are the key keywords?

A: Bond strength, impregnation, varnish adhesion, enamelled wire, twisted coil, helical coil, wire bundle, insulation testing, EN 61033, BS EN 61033.