GB/T 4074.21-2018
Winding wires test methods.Part 21: Electrical endurance under high frequency voltage impulses (English Version)

Standard No.: GB/T 4074.21-2018
Language: Chinese, Available in English version
Release Date: 2018
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 4074.21-2018

Scope: This part of GB/T 4074 specifies the test method for measuring the high-frequency pulse voltage resistance performance of winding wires in normal-pressure air by using high-frequency pulse voltage (also known as corona resistance test method), including test terms and definitions, test equipment , sample preparation, test procedures, test parameters and test records. This part applies to the following winding wires: ——corona-resistant enamelled round winding wire; ——240-grade aromatic corona-resistant polyimide film wrapped and sintered round and flat winding wire; ——glass fiber wrapped film wrapped flat winding wire ; - Flat winding wire wrapped with mica tape.

GB/T 4074.21-2018 Referenced Document

GB/T 30435 Electric gravity convection and forced ventilation ovens
GB/T 4074.5-2008 Winding wires.Test methods.Part 5:Electrical properties
GB/T 4074.7-2009 Winding wires.Test methods.Part 7::Test procedure for the determination of the temperature index of enamelled winding wires

2018 GB/T 4074.21-2018 Winding wires test methods.Part 21: Electrical endurance under high frequency voltage impulses