1.1 Scope The purpose of this guide is to establish, in a general way, suitable procedures and tolerances for installation of generator. This guide presents a typical assembly. It should be recognized that there are many possible ways to assemble a unit. The size of the machines, design of the machines, layout of the powerhouse or delivery schedule of the components are some of the elements that could result in additional steps, the elimination of some steps and/or assembly sequences. It is understood that a publication of this type will be binding only if, and to the extent that, both contracting parties have agreed upon it. The guide excludes matters of purely commercial interest, except those inextricably bound up with the conduct of installation. The guide applies to vertical generators according to IEC60034-7 Rev. 4. The tolerances in this guide have been established upon Best Practices and experience, although it is recognized that other standards are specifying different tolerances. Brushless excitation system is not included in the guide. Wherever the guide specifies that documents, drawings or information shall be supplied by a manufacturer (or by manufacturers), each individual manufacturer shall be required to furnish the appropriate information for their own supply only.