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162 www.usmotors.co
m
†
All marks shown within this document are properties o
f
their respective owners.
T
ERM
S
&
CO
NDITI
O
N
S
T
ERMIN
O
L
OGY
GU
ID
E
M
O
T
O
R
S
ELE
C
TI
O
N
GU
ID
E
INDE
X
M
otor Selection Guid
e
Instructions
How to Use this Selection Guide
:
1
.
M
easu
r
e
th
e
d
i
a
m
e
t
e
r
of
th
e
m
o
t
o
r i
f
n
o
t kn
o
wn.
2.
C
heck the RPM o
f
the motors;
(
7200 divided b
y
the number of poles or coil windin
g
s for 60 Hz
Applications
)
3ROHV 

WR

530
3ROHV 

WR

530


3ROHV 

WR

530


3ROHV 

WR

530
3.
M
easure the len
g
th o
f
the stack o
f
the stator to
determine horsepower.
(
Disassemble motor
f
or
this or measure between the dimples on the exterior
of the shell
)
4.

/RRNLQWKHWDEOHVDQG
¿
QGWKHPRWRUGLDPHWHU
\
RX
n
eed
f
or the replacement.
5
.
Find in the section that matches the volta
g
e
y
ou need.
6
.

/
RR
N
GR
ZQWK
H
530
FR
O
X
PQ
D
Q
G

¿
Q
G
WK
H
P
R
W
R
U
V

that match the required speed
.
7
.
Find the motors that have the same or
g
reater stack
(
or HP or Amps if known
)
.
8.
Then pick the
g
roup that is the ri
g
ht electrical t
y
pe
S
haded Pole or P
SC
. P
SC
can replace a
S
haded Pole,
but usuall
y
with 1
/
2" less stack. A shaded pole cannot
replace a P
SC
. All other motors should be replaced
b
y
the exact electrical t
y
pe.
9.
M
atch up the application and enclosure
y
ou need.
(
Do not use an open motor to replace an enclosed
motor.
)
This will point
y
ou to the catalo
g
motor
QXPEHU

V

WKDWPD
\
¿W
\
RXUDSSOLFDWLRQDQGWKH
SD
J
HR
I
WKHFDWDOR
J
ZKHUHWR
¿
QGWKHGHWDLOVRQ
the motor
(
s
)
. Turn to the catalo
g
pa
g
e and check
the detailed ratin
g
data and mechanical
f
eatures
to assure the proper selection.
A
bbreviations:
Shaft
D
BL Double
S
ha
ft
Enclosure
OD
P
O
pen Drip-Proo
f
OAO
O
pen Air
O
ver
ODPAO
O
pen Drip-Proof, Air
O
ver
OFC
O
pen Fan
C
oole
d
T
EAO Totall
y
Enclosed, Air
O
ver
T
EF
C
Totall
y
Enclosed, Fan
C
oole
d
T
ENV Totall
y
Enclosed, Non-Ventilate
d
Motor Type
Ca
p
S
t
C
apacitor
S
tar
t
CS/CR
C
apacitor
S
tart
/C
apacitor Ru
n
P
SC Permanent
S
plit
C
apacitor
Shd Pl
S
haded Pol
e
S
p
l Phs
S
plit Phas
e
S
p
l/Cr
S
plit Phase/Capacitor Ru
n
3
Phs Thr
ee
Ph
ase
SELECTION
GUIDE