Specifications are subject to change without notice
AC Motors
CAST IRON THREE PHASE MOTORS
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23
For reliable performance in heavy-duty industrial applications,
nothing beats the LEESON Heavyweights. With their cast iron
construction and 1.15 Service Factor, they are ideal for “tough
to handle” applications.
But that’s only part of the story. LEESON 150 and 170-series
cast iron motors are extremely versatile and can be field
converted in minutes to a number of different configurations,
including:
n
Severe Duty TEFC (using cast iron fan guard kit)
n
F2 mounting 180 frame or larger (by re-assembly)
n
C face with rigid base (from stock or using C face kit)
n
D flange with base (using D flange kit)
UL recognized and CSA certified.
Non-sparking fan.
Small size reduces noise
and enhances efficiency.
Fan keyed to shaft.
Steel fan cover
for optimum strength.
Cast iron cover available
for severe service.
Stainless steel “full fact” nameplate
with information on motor efficiency and
power factor. Includes wiring diagram,
bearing sizes, and motor weight.
Heavy-duty cast iron
frame, endbells and
conduit box.
100% copper-wound Inverter Rated Insulation
System
is double-dipped and baked. Stator press-
fitted and pinned to housing.
1.15 Service Factor
provides extra margin of power.
Class F insulation system with Class B or lower
temperature rise. Many suitable for 50 Hz operation
at 1.0 service factor. Contact factory for details.
Dynamically balanced rotor
assembly
is keyed to shaft.
Lubrication fittings
on
each end of motor (254T
frame and larger). New
Exxon POLYREX
®
EM
lubricant for extended
bearing life. Oversized
bearings. Slotted-head pipe
plug reliefs. Bearing caps
protect against entry of
grease into the motor.
Neoprene shaft slinger
protects bearings by
repelling moisture and
other contaminants.
Internal protection against
rust and corrosion.
Cast iron endplates
for maximum rigidity
and long bearing life.
One-way, corrosion resistant
condensate drains.
(TEFC
models) release condensation
and moisture.
Internal caps on shaft-end and lead-end
bearings
254T frame and larger. 182T
through 215T frame motors with C-faces
have locked bearing on the shaft end only.
Motors are suitable for all mounting positions.
Cast iron mounting feet.
Precision-
machined for accurate alignment. Dual
mounting provisions (six mounting holes) on
184T, 215T, 256T, 286T, 326T, 365T, 405T,
445T, 447T and 449T frames.
12-Lead Delta windings
(254T to 405T frame and
larger) for across-the-line or wye delta starts. (182T &
215T frame motors are dual voltage with nine leads.
Motors above 405T frame are single voltage with six
leads. 575V motors have six leads, except 213T-215T
which have three leads) Permanently marked leads
with lugs for easy connection. Normally-closed
thermostat standard on WATTSAVERe
®
designs.
Oversized cast iron conduit box
is
gasketed and may be rotated in 90˚
increments. NPT threaded entrance.
High torques for hard-to-start loads.
Torques exceed NEMA performance standards.
Energy performance verified
by LEESON’s
NVLAP-Certified testing laboratory.
LEESON’s Inverter Rated
Insulation System (IRIS
™
)
provides superior motor
protection against voltage
spikes induced by variable
frequency drives. This
total
insulation system
protects
better than spike-resistant
magnet wire alone. Specially
formed phase insulation, cushioned
and sleeved connections (from the leads all
the way into the turns), and deep-penetrating, non-hygroscopic, high
temperature varnish are just a few features contributing to the extra
protection. All this plus second generation, spike-resistant magnet wire. The
IRIS
™
total insulation system
is standard at no extra cost in all LEESON
stock NEMA three-phase motors, 1 HP and larger.
