AS 60034.7 pdf download -Rotating electrical machines Part 7: Classification of types of construction, mounting arrangements and terminal box position (IM Code)
This part of lEC 60034 specifies the lM Code, a classification of types of construction,mounting arrangements and the terminal box position of rotating electrical machines.
Two systems of classification are provided as follows:
– Code l (see section 2): An alpha-numeric designation applicable to machines with endshield bearing(s) and only one shaft extension.
– Code ll (see section 3): An all-numeric designation applicable to a wider range of types of machines including types covered by Code l.
The type of machine not covered by Code ll should be fully described in words.
The relationship between Code l and Code ll is given in annex A.
For the purposes of this part of lEC 60034, the following definitions apply:
type of construction
the arrangement of machine components with regard to fixings, bearing arrangement andshaft extension
the orientation on site of the machine as the whole with regard to shaft alignment and positionof fixings
a portion of a shaft extending beyond an extreme bearing(IEV 60411-13-07)
NOTE The bearing may be on the machine itself or be part of an assembly comprising a machine and (an)additional bearing(s).
drive-end of a machine (D-end)
that end of the machine which accommodates the shaft end
(IEV 6041 1 -1 3-36)
NOTE This is normally the driving end of a motor or the driven end of a generator.
Where for some machines the above definition is inadequate, the D-end is defined as follows:
a) Machine with two shaft extensions of different diameter: the end with the larger shaft diameter;
b) Machine with a cylindrical shaft extension and a conical shaft extension of the same diameter: the end with cylindrical shaft extention;
c) Machine with other arrangements: according to IEC 60034-8 if applicable; otherwise by agreement.
NOTE The outer diameter of a forged-on flange is taken to be the diameter of the shaft extension.
non-drive end of the machine (N-end)
that end of the machine opposite to the drive end
(IEV 6041 1 -1 3-37).
Section 2: Code I (alpha-numeric designation)
2.1 Designation of machines with horizontal shafts
In Code I, a machine with a horizontal shaft is designated by the code letters IM (International Mounting), followed by a space, the letter B, one or two numerals as shown in table 1 and an optional letter as shown in 2.3.