PRELIMINARY DESIGN REQUIREMENTS ARGONNE BOILING REACTOR (ARBOR) FACILITY. Revision I Page: 72 of 161
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The quantities and sizes of the electric motors used in the
plant will be determined from the requirements of the plant auxiliaries. All
motors 1/2 horsepower and larger shall be 440-v, 3-phase, 60-cycle AC,
except in the case of the large forced-circulation, reactor feed-water, and
water cooler and condenser secondary feed-water pump motors, which will
be 4160-v, 3-phase, 60-cycle AC as recommended by the pump manufac-
turers. Motors smaller than 1/2 horsepower may be either 110-v, 1-phase
or 440-v, 3-phase, 60-cycle AC, as convenient. In general, motors are
normal torque motors of the drip-proof types. Motors for outdoor service or
for operation in moist atmospheres are of the totally enclosed, fan-cooled
type. Drainage plugs are provided in the end shields of totally enclosed
All motors shall be started across the line if possible.
However, particular care is required in specifying starting equipment for
motors of 800 horsepower and higher, to assure compatibility with main
Site 16 substation equipment being provided at the EBR-II site. Coordination
with the designers of this equipment is imperative. Reduced voltage start-
ing and other special features may be necessary for these motors.
Circuit breakers and magnetic starters for all motors and
components shall be located in the electrical equipment room in the base-
ment of the Control Building, with the possible exception of those for the -
forced circulation and reactor feed-water, and- water cooler and steam con-
denser secondary feed-water pump motors, where economic study by the
Architect-Engineer may indicate more advantageous placement elsewhere.
In addition, all components, except the main pump motors just mentioned,
shall be provided with locally mounted disconnect switches for safety during
maintenance work. These switches must be hp-rated, non-fusible safety
switches with provisions for padlocking in both the open and closed positions,
and must meet NEMA standards and Federal Specifications W-S-865 for
Type A switches.
The position of operating handles, levers, etc., of all cir-
cuit breakers and disconnect switches must clearly indicate to the operator
the position of the breaker or switch. Provision must be made for padlock-
ing circuit breakers in either "Open" or "Test" positions. Disconnect
switches must have provision for locking either open or closed.
Each magnetic starter shall be controlled by a pushbutton
station in the control room. Control power for each magnetic starter for a
motor shall be 110-v AC supplied by an individual unfused transformer con-
nected to the load side of the circuit breaker for that motor. A green pilot ~
light, marked "Power On" and located above the push-button station, shall
indicate that the breaker is closed and the motor is ready to be started.
An amber pilot light marked "Run" shall indicate when the motor has been
started, and the green light shall be extinguished when the amber light is
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Fromm, L.W.; Bernsen, S.A.; Bullinger, C.F. & Matousek, J.F. PRELIMINARY DESIGN REQUIREMENTS ARGONNE BOILING REACTOR (ARBOR) FACILITY. Revision I, report, July 15, 1957; Lemont, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1023272/m1/72/: accessed March 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.