IEC 62631-3-12-2024 PDF

Full title and description

St IEC 62631-3-12-2024 — Dielectric and resistive properties of solid insulating materials - Part 3-12: Determination of resistive properties (DC methods) - Volume resistance and volume resistivity - Method for casting resins. This standard specifies a DC method to determine volume resistance and volume resistivity of electrical insulating casting resins (covers products described in IEC 60455 parts cited in the standard).

Abstract

IEC 62631-3-12:2024 defines the test method and associated equipment, specimen preparation and measurement procedures for determining volume resistance and volume resistivity of casting resins using DC voltage. It includes requirements for power supply, guarding, electrodes, measurement accuracy, specimen dimensions, temperature-related measurements and a procedure for testing after seven days of water immersion. The standard is published in English and French.

General information

• Status: Published / Current.
• Publication date: 5 July 2024.
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 17.220.99; 29.035.01.
• Edition / version: Edition 1.0 (ed.1.0).
• Number of pages: 24.

Scope

IEC 62631-3-12:2024 specifies a method of test for the determination of volume resistance and volume resistivity of electrical insulation materials by applying a DC voltage. It specifically covers casting resins described in IEC 60455-3-1, IEC 60455-3-2, IEC 60455-3-3, IEC 60455-3-4, IEC 60455-3-8 and similar products. The standard notes that for other material types the general method in IEC 62631-3-1 or other specific standards may be more suitable.

Key topics and requirements

• DC measurement method for volume resistance and volume resistivity of casting resins.
• Specification of power supply and DC voltage application requirements (including safety and stability considerations).
• Equipment and measurement accuracy: guarded electrode arrangements, electrometers/voltage/current measuring instruments and calibration requirements.
• Electrode design, specimen preparation and dimensional tolerances for cast resin samples.
• Procedures for measurements as a function of temperature and for measurements after seven days’ immersion in water.
• Calculation methods, reporting format and details to be included in test reports.
• Normative references and cross-references to IEC 62631-3-1 and relevant parts of IEC 60455.

Typical use and users

Used by materials and component manufacturers, independent test laboratories, certification bodies, R&D teams and quality control departments to evaluate the resistive properties of casting resins for electrical insulation applications. It supports product qualification, acceptance testing, comparative R&D studies and regulatory or procurement specifications where volume resistivity is required.

Related standards

Closely related standards include IEC 62631-3-1 (general method for volume resistance and resistivity), the IEC 60455 series (specifications for casting resins), and other parts of the IEC 62631 series covering dielectric and resistive test methods. European and national adoptions (EN IEC versions) of this publication exist.

Keywords

volume resistance, volume resistivity, DC methods, casting resins, insulating materials, guarding, electrodes, electrometer, water immersion, temperature dependence, IEC 62631, IEC 60455.

FAQ

Q: What is this standard?

A: IEC 62631-3-12:2024 is an international standard that specifies a DC test method for determining the volume resistance and volume resistivity of casting resins used as electrical insulating materials.

Q: What does it cover?

A: It covers test apparatus, specimen preparation, measuring procedure (including temperature-dependent measurements and tests after seven days’ immersion in water), calculation methods and reporting for cast resin materials referenced to the IEC 60455 series.

Q: Who typically uses it?

A: Materials manufacturers, independent test laboratories, certification and compliance bodies, product designers and quality assurance teams concerned with electrical insulation performance of casting resins.

Q: Is it current or superseded?

A: It was published on 5 July 2024 and is the current (first) edition as of that date. There is no indication of it being superseded; IEC lists a stability period for the publication. For the absolute current status check official IEC publications or national adoption bodies if needed.

Q: Is it part of a series?

A: Yes — it is part of the IEC 62631 series (Dielectric and resistive properties of solid insulating materials) and is linked to IEC 62631-3-1 (general method) and the IEC 60455 series (casting resin product standards).

Q: What are the key keywords?

A: Key keywords are volume resistance, volume resistivity, casting resins, DC methods, guarding, electrodes, electrometer, temperature dependence, water immersion and insulating materials.