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Integral-Horsepower
Motors
The system for numbering
the frames of integral-horsepower motors shall be as follows:
- The first two
digits of the frame number are equal to four times the “D” dimension
in inches. When this product is not a whole number, the first two
digits of the frame number shall be the next higher whole number
- The third digit
of the frame number is obtained from the value of 2F (see dimensions
from manufacturer).
The letters A, C,
CH, D, E, HP, HPH, JM, JP, LP, LPH, P, PH, R, S, T, U, V, VP, X, Y
or Z shall immediately follow the frame number to denote variations
as follows:
A - Industrial direct-current
motor or generator
C - Face mounting on drive end
CH - Face mounting dimensions are different from those for the frame
designation having the suffix letter C. (The letters CH are to be considered
as one suffix and should not be separated.)
D - Flange mounting on drive end.
E - Shaft extension dimensions for elevator motors in frames larger than
the 326U frame
S - Standard shaft for direct connection (see dimension tables)
T - Included as part of a frame designation for which standard dimensions
have been established (see dimension tables)
U - Previously used as part of a frame designation for which standard
dimensions had been established
V - Vertical mounting only
X - Wound-rotor crane motors with double shaft extension
Y - Special mounting dimensions (dimensional diagram must be obtained
from the manufacturer)
Z - All mounting dimensions are standard except the shaft extension(s).
Also used to designate motor with double shaft extension. (dimensional
diagram must be obtained from the manufacturer)
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