1 Scope
This standard specifies the requirements for acceptance, operation and maintenance of tap-changers (on-load tap-changers and off-circuit tap-changers) used for power transformers.
This standard is applicable to resistance filtered oil-immersed and dry on-load tap-changers (hereinafter referred to as "on-load changers") and off-circuit tap-changers (hereinafter referred to as "off-circuit tap-changers") for power transformers with rated voltage 35(20)kV~750kV.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to this standard.
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 General Provisions
5 Installation and Acceptance
6 Operation Management
7 Maintenance Management
8 Reasons of Common Abnormal Conditions, Check and Treatment
9 Maintenance Process of Common On-load Tap Changer
