treated and rinsed per manufacturers' standard process. If any of the
above-listed parts are not coated during the process of insulating the
windings then, in addition to the above, they shall be given two coats of
primer and then two coats of manufacturers' standard moisture-resistant
coating, processed as required.
1.3.1.5
Cores
The assembled motor core shall be thoroughly cleaned and then immediately
primed by applying a minimum of two coats of a moisture-resisting and
oil-resisting insulating compound. Air gap surfaces shall be given a
minimum of one coat.
1.3.1.6
Shafts
Exposed surfaces of motor shafts shall be cleaned of rust, grease, and dirt
and, except for bearing surfaces, given one coat of a zinc molybdate or
equivalent primer and two coats of a moisture-proof coating, each cured as
required. Shafts of a corrosion-resisting steel may be used in lieu of the
above-mentioned treatment.
1.3.1.7
Finish Painting
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NOTE: If severely moist conditions exist, a
separate paint system should be specified using
UFGS-09964 PAINTING: HYDRAULIC STRUCTURES, system
21, epoxy finish or equivalent. When such painting
is specified, care must be taken to specify a paint
that will adhere to and not be injurious to the
protective painting provided under these
specifications.
**************************************************************************
Finish painting of all equipment shall be in accordance with the standard
practice or recommendation of the manufacturer, as approved by the
Contracting Officer.
1.3.2
Winding Insulation
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NOTE: Include contract specification number where
service conditions are described.
**************************************************************************
Insulation for the stator, rotor field, and exciter windings shall be full
class "F" insulation as defined in NEMA MG 1 paragraph 1.66 and as
described herein. The insulation system shall be a combination of
materials and processes which provides high resistance to moisture, fungus,
and other contaminants as experienced by a motor in the service conditions
specified herein. The insulation system shall also be of a type designed
and constructed to withstand severe humidity conditions and to function
properly after long periods of idleness without first drying out. All
windings and connections shall be of the sealed type as defined in NEMA MG 1
paragraph 1.27.2. Insulated windings, unless otherwise approved, shall be
completely assembled in the motor core before impregnating with the
insulating compound. The compound shall consist of 100 percent solid
resin. Impregnation of the windings with the insulating compound shall be
by vacuum impregnation method followed by baking. The procedure shall be
SECTION 16222A
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