GB/T 25301-2021 Active National standards

GB/T 25301-2021 Resistance welding equipment—Transformers—General specifications applicable to all transformers

Publish Date: 2021-05-21 Implement Date: 2021-12-01 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 25301-2021

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Welding and cutting equipment

ICS Name: Welding equipment

Publish Date: 2021-05-21

Implement Date: 2021-12-01

Pages: 28 pages

Scope

This document specifies the technical requirements for the following types of transformers used in resistance welding equipment: -- Single-phase transformers for AC welding, typically operating at 50 Hz or 60 Hz; -- Single-phase transformers connected to rectifiers for DC welding, typically operating at 50 Hz or 60 Hz; -- Single-phase inverter transformers connected to rectifiers for DC welding, typically operating at 400 Hz to 2 kHz; -- Three-phase transformers connected to rectifiers for DC welding, typically operating at 50 Hz or 60 Hz. For the purposes of this document, the term "transformer" may refer to either a standalone transformer or a transformer connected to a rectifier (transformer rectifier unit). This document applies to Class I or Class II protective transformers that comply with IEC 61140. Note: The requirements of this document may be supplemented by other resistance welding transformer standards, such as ISO 22829 and ISO 10656.