GB/T 20833.2-2025 Active National standards

GB/T 20833.2-2025 Rotating electrical machines—Winding insulation—Part 2:On-line partial discharge measurements on the stator winding insulation

Publish Date: 2025-08-01 Implement Date: 2026-02-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 20833.2-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Rotating motor

ICS Name: Rotating motor comprehensive

Publish Date: 2025-08-01

Implement Date: 2026-02-01

Pages: 56 pages

Scope

This document specifies the online measurement of partial discharge in the stator windings of rotating motors powered by non-inverters at a rated voltage of 3 kV and above, including:
—— Measurement techniques and instruments;
—— Arrangement of the test circuit;
—— Standardization and sensitivity evaluation;
—— Measurement procedures;
—— Reduction of noise;
—— Preparation of test results documents;
—— Evaluation of test results.
This document specifies the partial discharge test system and methods for detecting electrical partial discharge. The same measurement devices and procedures can also be used to detect electric sparks and arcs.

Development Information

Word Count: 96 Thousand words Pages: 56 pages

Replace the following standards

GB/T 20833.2-2016 Rotating electrical machines—The stator winding insulation of rotating electrical machines—Part 2:On-line partial discharge measurements

Referenced Standards

ISO 8528-9 IEC 60034-27-1 IEC 60034-27-3 IEC 60060-1 IEC 60068-2-6 IEC 60068-2-27 IEC 60112 IEC 60270 IEC 62271-1 IEC TS 62478

Adopt standards

IEC 60034-27-2:2023

Related Standards

GB/T 7346-1998 Replaced

GB/T 7346-1998 Basic outline constructional type for control motors and feedback components

Publish Date: 1998-01-19

GB/T 4772.1-1999 Replaced

GB/T 4772.1-1999 Dimensions and output series for rotating electrical machines—Part 1:Frame numbers 56 to 400 and flange numbers 55 to 1080

Publish Date: 1999-02-26

GB/T 4772.2-1999 Active

GB/T 4772.2-1999 Dimensions and output series for rotating electrical machines— Part 2:Frame numbers 355 to 1000 and flange numbers 1180 to 2360

Publish Date: 1999-02-26

GB/T 4772.3-1999 Active

GB/T 4772.3-1999 Dimensions and output series for rotating electrical machines— Part 3:Samll built-in motors flange numbers BF10 to BF50

Publish Date: 1999-02-26

GB 10068-2000 Replaced

GB 10068-2000 Mechanical vibration of certain machines with shaft heights 56mm and higher—Measurement,evaluation and limits of vibration

Publish Date: 2000-01-03

GB/T 17948.1-2000 Replaced

GB/T 17948.1-2000 Rotating electrical machines—Functional evaluation of insulation systems—Test procedures for wire-wound windings—Thermal evaluation and classification

Publish Date: 2000-01-03