Product Manual

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EXAMPLE:
Position No. 1 2 3 4 5 6 7 8 9 10
Sample Model No. A B 4 C 17 D B 1 A (A-Z)
Position 1: U.L. Prefix
A— Auto protector. U.L. recognized for locked rotor plus run,
also recognized construction (U.L. 1004)*.
M— Manual protector. U.L. recognized for locked rotor plus run,
also recognized construction (U.L. 1004)*.
L— Locked rotor protector (automatic). U.L. recognized for locked rotor
only, also recognized construction (U.L. 1004)*.
C— Component recognition. (U.L. 1004) No protector.
U— Auto protector. Not U.L. recognized.
P— Manual protector. Not U.L. recognized.
T— Thermostat, not U.L. recognized.
N— No overload protection.
*This applies only to 48, S56, and 56 frame designs through 1 HP, Open & TENV.
Position 2: (Optional)
This position is not always used.
M— Sub-Fractional HP Motors.
Z— BISSC Approved.
Other— Customer Code
Position 3: Frame
4 - 48 Frame 23 - 23 Frame 40 - 40 Frame
6 - 56 Frame 30 - 30 Frame 43 - 43 Frame
42 - 42 Frame 34 - 34 Frame 44 - 44 Frame
143 - 143T Frame 36 - 36 Frame 53 - 53 Frame
145 - 145T Frame 38 - 38 Frame 65 - 65 Frame
182 - 182T Frame 39 - 39 Frame
184 - 184T Frame
213 - 213T Frame
215 - 215T Frame
Position 4: Motor Type
C— Cap. Start/Ind. Run T— Three Phase
D— Direct Current B— Brushless DC
K— Cap. Start/Cap. Run H— Hysteresis Sync.
P— Permanent Split R— Reluctance Sync.
S— Split Phase
Position 5: RPM
RPM-Single Speed RPM-Multi-Speed
34 - 3450 RPM 60 Hz 2 Pole 24 - 2 and 4 Poles
28 - 2850 RPM 50 Hz 2 Pole 26 - 2 and 6 Poles
17 - 1725 RPM 60 Hz 4 Pole 82 - 2 and 8 Poles
14 - 1425 RPM 50 Hz 4 Pole 212 - 2 and 12 Poles
11 - 1140 RPM 60 Hz 6 Pole 46 - 4 and 6 Poles
9 - 950 RPM 50 Hz 6 Pole 48 - 4 and 8 Poles
8 - 960 RPM 60 Hz 8 Pole 410 - 4 and 10 Poles
7 - 720 RPM 50 Hz 8 Pole 412 - 4 and 12 Poles
7 - 795 RPM 60 Hz 10 Pole 68 - 6 and 8 Poles
6 - 580 RPM 50 Hz 10 Pole
6 - 580 RPM 60 Hz 12 Pole
Odd frequencies other than 50 Hz show synchronous speed code.
DC and special motors may have one, two, or three digits indicating
motor speed rounded to the nearest hundred RPM.
Position 6: Enclosure
D— Drip-Proof
E— Explosion-Proof TENV
F— Fan Cooled
N— TENV
O— Open
S— Splashproof
W— Weatherproof, Severe Duty, Chemical Duty,
WASHGUARD™ - TEFC
X— Explosion-Proof TEFC
V— Weatherproof, Severe Duty, Chemical Duty,
WASHGUARD™ - TENV
Position 7: Mounting
B— Rigid base standard
C— “C” face - no base - NEMA
D— “D” flange - no base - NEMA
H— 48 frame - 56 frame mounting/shaft rigid
J— 48 frame - 56 frame mounting/shaft resilient
K— Rigid mount with “C” flange
L— Rigid mount with “D” flange
M— Motor parts - rotor and stator
R— Resilient base
S— Shell motor
T— Torpedo (face-less/base-less)
Z— Special mounting
Position 8: Sequence Number
Number assigned as required when new designs
with new characteristics are needed.
Position 9: Modification Letter
Major modification letter. Used when revisions
made in existing model will affect service parts.
Position 10: (Optional)
A date code consisting of either A-Z,
and two digits 00-99.
Reading a LEESON Model Number
There is no independently established standard for setting up a motor’s
model number, but the procedure is typically tied to descriptions of
various electrical and mechanical features. While other manufacturers
use other designations, here is how LEESON model numbers are
configured.