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Description / Abstract:
This document covers general recommendations for the repair of
alternating current (ac) electric motors and includes guidelines
for both the user and the repair facility. It is not intended to
replace specific instructions contained in the manufacturer’s
instruction book or in any contractual agreement between a
manufacturer and a purchaser of a given machine. For the purpose of
this document, the term motor is used in lieu of, and shall equate
to, the terms wound rotor, generator, and machine
This standard covers reconditioning, repair, and rewind of
horizontal and vertical induction motors and of synchronous motors.
It applies to all voltages 15 kV and less, and all ratings above
0.75 kW (1 hp).
This standard applies only to the repair of motors, and in cases
involving modifications to the basic design, care must be taken so
as not to negatively affect the safety and reliability of the
motor.
Excluded from the scope of this standard are the following:
-Specific requirements, certification, and inspection
required for explosion proof, dust-ignition proof, flameproof, and
like motors having a listing issued by a Nationally Recognized
Testing
Laboratory (NRTL), for example, American Bureau of Shipping
(ABS), Underwriters Laboratories, Inc. (UL), Factory Mutual (FM),
and Canadian Standards Association (CSA). For motors in this
category, the user shall verify if the repair facility shall be
certified by such an agency.
-Any specific or additional requirements for hermetic
motors, hydrogen-cooled generators, submersible motors, or Class 1E
nuclear service motors.
-Direct current (dc) motors.
Purpose
This standard is intended to be used and referenced by users of
motors that need repair as well as by owners and operators of
establishments that offer motor repair services. It has been
developed primarily for the needs of the petroleum, chemical, and
process industries, but can be adapted to other applications or
industries.
The use of this standard by users and repair facilities is
expected to result in higher quality, cost-effective, timely
repairs. It also provides a means of evaluating repairs and
facilities