IEEE P1068-D3-2015 pdf free.Draft Standard for Repair and Rewinding of AC Electric Motors in the Petroleum, Chemical, and Process Industries.
repair facility: The entity contracted to make repairs. which includes the “on site” repair(s) made by employees 1)1 that entity in addition to repair(s) made at a service ccntcr operated by or under thc sLipervision of that entity.
tolal indicated runout (TIR): The difference between highest and lowest reading of a dial gauge touching a shaft (mcchanical runout) or rotor, or a properly adjusted non-contacting proximity probe sensing the shaft surface (electrical runout) at a designated location on a shaft as it is slowly rotated through a complete revolution. The readings shall be taken with the shaft in its bearings, on V blocks or in centers, and may be different depending on the method used.
user: The owner of the motor or an authorized agent of the owner.
4. Responsibilities
Items to be considered and documented throughout the various stages of refurbishment and repair vary in number depending on the level of repair to be undertaken. The definition of issues and their resolution ranges from simple to complex. where complicated problems may require several iterative investigations and solutions. This begins at the user’s facility prior to removal of the motor and then continues through pre-repair appraisal. dismantling, component evaluation, refurbishment or repair, and final testing at the repair facility. Some users may continue recording and evaluation during the re-installation and startup process. The items, steps, or processes noted within this document are not listed in any specific order and may be modified. added. or deleted as necessary: performed in a different order: or conducted simultaneously.
Photographs are part of the appraisal process and inspection report and may be necessary for reassembly or fuilure analysis. Photographs are useful for clarifying conditions that cannot be described adequately:
documenting location, orientation, or special markings; or identifying the extent of visible damage. Examples include conduit locations, cable routing, fan orientation, stator coil damage, broken rotor bars,
I and so on. Photographic arePhotography is also useful in documenting the arrangement of complex parts. and for providing a record throughout the repair process. The use of digital photography is highly encouraged.
In the absence of clear photographs, any drawings, sketches, diagrams, or descriptions should allow no uncertainty as to the location of the conditions described. If references art made to “clock position” or to ends of the motor (e.g., “inboard” or “outboard”), some explanatory note or sketch should make clear the location being described. The terms ‘drive end” and “opposite drive end” are recommended for horizontal shaft motors, and “top” and “bottom” are recommended for vertical shaft units.
4.1 User responsibility
To ensure that the repair operation is of high quality and is cost cfkctivc, the user should make advance preparation and prequalification of the repair facility. These steps should be finished prior to motor failure or shipment of the unit. The user may designate a representative to coordinate communication with the repair facility.IEEE P1068-D3 pdf free download.