IEEE 1068-1996 pdf download IEEE Recommended Practice for the Repair and Rewinding of Motors for the Petroleum and Chemical Industry
1. Overview
1.1 Scope
This recommended practice covers general recommendations for the repair of electric motors and includesrecommendations for both the user and the repair facility. It is not intended to supplant specific instructionscontained in the manufacturer’s instruction book or in any contractual agreement between a manufacturerand a purchaser of a given machine.
These recommendations apply to horizontal and vertical motors, NEMA frame size 140 and above, having ayoltage rating of 15 kV or less. These recommendations apply only to the repair of motors and are notintended to cover major modifications.
Excluded from the scope of this recommended practice are the following:
Specific requirements, certification, and inspection required for listed explosion-proof and dust-igni-tion-proof machines.
Any specific or additional requirements for hermetic motors, hydrogen-cooled machines, submers-ible motors,or Class 1E nuclear service motors.
1.2 Purpose
This recommended practice is inended to be a basic or primary document that can be utilized and referencedby owners of motors that need repair as well as by owners and operators of establishments that offer motorrepair services. It has been developed primarily for the needs of the Petroleum and Chemical Industry butcan be adapted to other applications.
The use of this recommended practice by users and repair facilities is expected to result in higher-quality,more cost-effective, and timely repairs. It also provides a means of evaluating repairs and facilities.
2. References
2.1 General
Definitions, construction, and test methods not specifically covered in this recommended practice shouldcomply with the following standards insofar as they are applicable. When the following standards are super.seded by an approved revision, the revision shall apply.
API 541-1995, Form-Wound Squirrel-Cage Induction Motors 250 hp and Larger.
IEEE Std 1-1986 (Reaff 1992), IEEE Standard General Principles for Temperature Limits in the Rating ofElectric Equipment and for the Evaluation of Electrical Insulation (ANSI).
EEE Std 100-1996, IEEE Standard Dictionary of Electrical and Electronics Terms.
IEEE Std 112-1991, 1EEE Standard Test Procedure for Polyphase Induction Motors and Generators (ANSI)
IEEE Std 115-1983 (Reaff 1991), IEEE Guide: Test Procedures for Synchronous Machines (ANSI)
IEEE Std 432-1992,1EEE Guide for Insulation Maintenance for Rotating Electrical Machinery (5 hp to lessthan 10 000 hp)(ANSI).
IEEE Std 841-1994, 1EEE Standard for the Petroleum and Chemical Industry-Severe Duty Totally EnclosedFan-Cooled (TEFC) Squirrel Cage Induction Motors-Up to and Including 500 hp (ANSI).
NEMA MG 1-1993Motors and Generators.
2.2 Insulation tests
Where appropriate to the construction, tests should be made in accordance with the following IEEE testprocedures:
IEEE Std 43-1974 (Reaff 1991), IEEE Recommended Practice for Testing Insulation Resistance of RotatingMachinery (ANSI).
IEEE Std 117-1974 (Reaff 1991), IEEE Standard Test Procedure for Evaluation of Systems of InsulatingMaterials for Random-Wound AC Electric Machinery (ANSI).
IEEE Std 275-1992, EEE Recommended Practice for Thermal Evaluation of Insulation Systems for Alter-nating-Current Electric Machinery Employing Form-Wound Preinsulated Stator Coils for Machines Rated6900 V and Below (ANSI).
IEEE Std 429-1994,IEEE Recommended Practice for Thermal Evaluation of Sealed Insulation Systems forAC Electric Machinery Employing Form-Wound Preinsulated Stator Coils for Machines Rated 6900 V andBelow (ANSI).
IEEE 1068-1996 pdf download
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