"Torques," will be met or exceeded.
2.12.3
Check Tests
A check test of a synchronous motor and exciter shall include the following:
a.
Routine test per NEMA MG 1 paragraph 21.51.
b.
Cold resistance measurement.
c. Insulation resistance and winding temperature at time the
insulation resistance was measured.
d.
Conformance test in accordance with NEMA MG 1 paragraph 20.49.
e.
Motor balance in accordance with NEMA MG 1 paragraph 20.54.
2.12.4
Stator Winding Coil Tests
All coils, either before or after they are placed in the slots, shall be
tested for short circuits between turns of the individual coils by applying
a high frequency voltage of not less than 75 percent of the voltage for
which the machine is insulated, or by applying a surge test voltage of
equivalent value to the terminals of each coil. Equivalent surge voltage
shall be a wave whose peak value is equal to 1.06 times the voltage for
which the motor is insulated.
2.12.5
Space Heater Tests
Each winding space heater unit shall be tested at the factory for
successful operation and dielectric strength.
2.13
RENEWAL PARTS
The following renewal parts shall be furnished for each type and rating in
addition to the assembled motors:
a. Two complete stator coils but not less than the number of coils to
span one coil pitch with necessary wedges and material for installation
for one motor.
b. Two complete field coils, including necessary materials for
installation.
c. One complete exciter field coil, including necessary materials for
installation.
d. One complete set of bearing parts for pump motors.
Each set to
include:
(1)
Stationary thrust bearing plate.
(2)
Rotating thrust bearing plate.
(3)
Upper guide bearing lining.
(4)
Lower guide bearing lining.
(5)
Two sets of oil rings for pump motors.
SECTION 16222A
Page 28
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