repeated as often as necessary to fill in and seal over the interstices of
the winding, but in no case shall the number of dips and bakes be less than
two dips and bakes when the vacuum method of impregnation is used.
Insulation to ground shall be processed on the coil. Slot tubes or cells
are not acceptable. The insulation shall be of adequate thickness and
breakdown strength throughout the length of the coil. Mica shall be used
in the slot portion and shall be of adequate thickness to withstand the
dielectric tests specified in paragraph FACTORY TESTS.
1.3.3
Nameplates
Nameplate data shall include rated voltage, rated full-load amperes, rated
horsepower, service factor, number of phases, RPM at rated load, frequency,
code letter, locked-rotor amperes, duty rating, insulation system
designation, and maximum ambient design temperature.
1.3.4
Government Study
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NOTE: Item d. may be used only when the pump and
motor are furnished under the same procurement.
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The Contractor shall supply to the Government, for completion of its Motor
Torque and Accelerating Time Studies (MTATS), the following data:
a. Complete equivalent circuit data referred to the stator with
friction, windage, and stray load losses.
b. Current, power factor, and torque versus speed (0-100
percent, inclusive, in 1 percent increments up to 95 percent and
0.1 percent increments above 95 percent) and load (0-125 percent,
inclusive, in 25 percent increments) as a function of line voltage
(from 80 percent to 110 percent, inclusive, in 5 percent
increments), for rated and 90 percent of rated voltage at starter.
Only tabulated data will be required.
c.
Load inertia, Wk2 of motor rotating parts, pound-foot2.
[d. Load inertia, Wk2 of pump rotating parts (wet),
pound-foot2.]
1.4
SYSTEM DESCRIPTION
The work under this section includes furnishing all labor, equipment, and
material and performing all operations required to design, manufacture,
assemble, factory test, prepare for shipment and storage, and to deliver
the vertical synchronous motors required to drive the flood-control pumps
specified under Section 15131A VERTICAL PUMPS, AXIAL-FLOW AND MIXED-FLOW
IMPELLER-TYPE. These motors shall be supplied complete with all
accessories, spare parts, tools, and manufacturer's data and instructions
as specified herein.
1.5
DELIVERY, STORAGE, AND HANDLING
Each motor shall be shipped in the vertical position with the rotor blocked
inside the stator to prevent damage to the bearings. The motor shall be
securely mounted on a skid or pallet of ample size. All small parts or
elements shall be boxed. The skid mounting and boxing shall be done in a
SECTION 16222A
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