新的！IEC 62256:2017作为IEC 62256:2017 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 62256:2017涵盖所有尺寸和以下类型的涡轮机、蓄能泵和水泵水轮机:混流式；卡普兰；螺旋桨；冲击式（仅限涡轮机）和灯泡式涡轮机。 本文件还确定了可能影响涡轮机、存储泵或泵-涡轮机修复或受其影响的其他发电站设备，但没有详细讨论。本文件的目的是帮助确定、评估和执行水轮机、蓄能泵和水泵水轮机的修复和性能改进项目。业主、顾问和供应商可使用本文件定义:康复和绩效改进的需求和经济学；工作范围；规格和结果评估。本文件旨在:帮助决策过程；关于康复的广泛信息来源；确定康复过程中的关键里程碑；以及确定在决策过程中要解决的点。本文件既不是详细的工程手册，也不是维护文件。这第二版取消并取代了2008年出版的第一版。本版构成技术修订版。与上一版相比，本版包括以下重大技术变化:表2至表23修改、完成并移至附录A；7.3.2:随文本变化而移动的子条款；关于温度、噪音、电偶腐蚀、磨损和未经评估更换部件的新子条款；7.3.3:完成关于剩余寿命的新子条款；将表29至32移至附件C；附有评估实例的新附件B。 关键词:水轮机，蓄能泵，水泵水轮机，修复，性能。

NEW!IEC 62256:2017 is available as IEC 62256:2017 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 62256:2017 covers turbines, storage pumps and pump-turbines of all sizes and of the following types: Francis; Kaplan; propeller; Pelton (turbines only) and bulb turbines.
This document also identifies without detailed discussion, other powerhouse equipment that could affect or be affected by a turbine, storage pump, or pump-turbine rehabilitation. The object of this document is to assist in identifying, evaluating and executing rehabilitation and performance improvement projects for hydraulic turbines, storage pumps and pump-turbines. This document can be used by owners, consultants, and suppliers to define: needs and economics for rehabilitation and performance improvement; scope of work; specifications and evaluation of results. This document is intended to be: an aid in the decision process; an extensive source of information on rehabilitation; an identification of the key milestones in the rehabilitation process; and identification of the points to be addressed in the decision processes. This document is not intended to be a detailed engineering manual nor a maintenance document. This second edition cancels and replaces the first edition published in 2008. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: Tables 2 to 23 modified, completed and moved to Annex A; 7.3.2: subclauses moved with text changes; new subclauses on temperature, noise, galvanic corrosion, galling and replacement of components without assessment; 7.3.3: complete new subclause on residual life; Tables 29 to 32 moved to Annex C; New Annex B with assessment examples.

Key words: Turbines, Storage pump, Pump turbines, Rehabilitation, Performance.