2.1.3.3
Eyebolts
Eyebolts, lugs, or other approved means shall be provided for assembling,
dismantling, and removing the motors from above, utilizing the overhead
pumping station building crane. All lifting devices for use in conjunction
with the building crane shall be furnished with the motor.
2.1.3.4
Platforms and Stairways
Each motor shall be furnished with a platform and stairway complete with
railing. An easily removed section of railing shall be provided so that
the rotor shaft does not have to be hoisted above the railing when the
rotor is removed. The platform shall also provide maintenance access as
required by the motor furnished. The stairway shall be located [_____]
degrees [counter-] clockwise from the discharge elbow of the pump, when
looking down on the motor/pump assembly.
2.1.4
Guards and Protective Enclosures
All moving, energized, or other parts where accidental contact might be
hazardous to personnel shall be equipped with adequate guards, rails, or
other suitable enclosures to prevent accidental contact. All lubrication
fittings shall be piped to convenient locations where they can be serviced
from regularly utilized access ways without removal of the guards or
enclosures.
2.1.5
Insulation Against Stray Currents
The motor shall be adequately insulated against stray currents which may be
set up by the field of the motor and which might cause injury to the motor
or pump bearings. This insulation shall be arranged to break the possible
path of such currents in not less than two places in series.
2.1.6
Motor Cooling
The motor shall be provided with an open-type system of ventilation, taking
cooling air from above the operating floor level and discharging the heated
air into the operating room through upper openings in the stator frame.
The circulation of air shall be induced by means of the fan action of the
rotor. No openings to the air space below the operating level are to be
used in the motor design for ventilation or other uses that are not
reasonably airtight.
2.1.7
Stator
2.1.7.1
Stator Core
The cores shall be built up of separately punched thin laminations of
low-hysteresis loss, nonaging, annealed, electrical silicon steel;
assembled under heavy pressure; and clamped in such a manner as to ensure
that the assembled core is tight at the top of the teeth of the laminated
core. Laminations shall be properly insulated from each other. Only
laminations free from burrs shall be used, and care shall be taken to
remove all burrs or projecting laminations from the slots of the assembled
cores. Cores shall be keyed, dovetailed, or otherwise secured to the shaft
or frame in an approved manner. Treatment against corrosion shall be as
specified in paragraph GENERAL REQUIREMENTS.
SECTION 16222A
Page 17
Previous Page
