EN 60034-7:1993

SLOVENSKI STANDARD
01-april-1999
1DGRPHãþD
SIST HD 537:1992
Rotating electrical machines - Part 7: Classification of types of construction and
mounting arrangements (IM Code) (IEC 60034-7:1992)
Rotating electrical machines -- Part 7: Classification of types of construction, mounting
arrangements and terminal box position (IM Code)
Drehende elektrische Maschinen -- Teil 7: Klassifizierung der Bauarten, der
Aufstellungsarten und der Klemmkasten-Lage (IM-Code)
Machines électriques tournantes -- Partie 7: Classification des modes de construction,
des dispositions de montage et position de la boîte à bornes (Code IM)
Ta slovenski standard je istoveten z: EN 60034-7:1993
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
INTERNATIONALE IEC
34-7
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
1992-12
électriques tournantes
Machines
Partie 7:
Classification des formes de construction et
des dispositions de montage (Code IM)
Rotating electrical machines
Part 7: f
Classification of types of constructions and
mounting arrangements (IM Code)
de reproduction réservés — Copyright — all rights reserved
© CEI 1993 Droits
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–3 -
34-7 © IEC
CONTENTS
Page
FOREWORD 5
Clause
SECTION 1 SCOPE AND DEFINITIONS

11 Scope
12 Definitions
SECTION 2 CODE I (ALPHA-NUMERIC DESIGNATION)
21 Designation of machines with horizontal shafts
2 2 Designation of machines with vertical shafts
SECTION 3 CODE II (ALL-NUMERIC DESIGNATION)
31 Designation
3 2 Significance of the first numeral
3 3 Significance of the fourth numeral
3 4 Significance of the second and third numerals 25
3 5 Examples of designations
Tables
1 Designations for machines with horizontal shafts (IM B )
ical shafts (IM V ) 17
2 Designations for machines with ve rt
3 Significance of the first numeral
4 Significance of the fourth numeral
5 Significance of second and third numerals for first numeral 1
6 Significance of second and third numerals for first numeral 2
7 Significance of second and third numerals for first numeral 3 31
8 Significance of second and third numerals for first numeral 4
9 Significance of second and third numerals for first numeral 5
10 Significance of second and third numerals for first numeral 6
11 Significance of second and third numerals for first numeral 7
12 Significance of second and third numerals for first numeral 8
13 Significance of second and third numerals for first numeral 9
Annex
A Relationship between Code I and Code II

34-7 © IEC – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
ROTATING ELECTRICAL MACHINES
Part 7: Classification of types of construction
and mounting arrangements (IM Code)
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees) The object of the IEC is to
promote international cooperation on all questions concerning standardization in the electrical and
electronic fields To this end and in addition to other activities the IEC publishes International Standards
Their preparation is entrusted to technical committees; any IEC National Committee interested in
the subject dealt with may participate in this preparatory work International, governmental and
non governmental organizations liaising with the IEC also participate in this preparation The IEC
collaborates closely with the International Organization for Standardization (ISO) in accordance with
conditions determined by agreement between the two organizations
The formal decisions or agreements of the IEC on technical matters, prepared by technical committees on
2)
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with
They have the form of recommendations for international use published in the form of standards, technical
3)
reports or guides and they are accepted by the National Committees in that sense
In order to promote international unification, IEC National Committees undertake to apply IEC International
4)
Standards transparently to the maximum extent possible in their national and regional standards Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter
International Standard IEC 34-7 has been prepared by IEC by sub-committee 2H Degrees
of protection, methods of cooling and mounting arrangements, of IEC technical committee
2 Rotating machinery
This second edition cancels and replaces the first edition published in 1972 and constitu-
tes a technical revision
The text of this standard is based on the following documents
DIS Repo rt on Voting
2H(CO)30
2H(CO)29
rt
Full information on the voting for the approval of this standard can be found in the repo
on voting indicated in the above table
rts, under the general title Rotating electrical
IEC 34 consists of the following pa
machines
Rating and performance, issued as IEC 34-1
Pa rt 1
Methods for determining losses and efficiency of rotating electrical
Part 2
machinery from tests (excluding machines for traction vehicles), issued as
IEC 34-2
First supplement Measurement of losses by the calorimetric method, issued
rt 2A
Pa
as IEC 34-2A
34-7 ©IEC - 7 -
Part 3 Specific requirements for turbine-type synchronous machines, issued as
IEC 34-3
Part 4 Methods for determining synchronous machine quantities from tests, issued
as IEC 34-4
Classification of degrees of protection provided by enclosures of rotating
Part 5
electrical machines (IP Code), issued as IEC 34-5
Methods of cooling (IC Code), issued as IEC 34-6
Part 6
Classification of types of constructions and mounting arrangements
Part 7
(IM Code), issued as IEC 34-7
Part 8 Terminal markings and direction of rotation of rotating machines, issued as
IEC 34-8
Part 9 Noise limits, issued as IEC 34-9
Part 10 Conventions for description of synchronous machines, issued as IEC 34-10
Part 11 Built-in thermal protection, Chapter 1 Rules for protection of rotating
electrical machines, issued as IEC 34-11
Part 11-2 Built-in thermal protection Chapter 2 Thermal detectors and control units
used in thermal protection systems, issued as IEC 34-11-2
Part 11-3 Built-in thermal protection Chapter 3 General rules for thermal protectors
used in thermal protection systems, issued as IEC 34-11-3
Starting performance of single-speed three-phase cage induction motors for
Part 12
voltages up to and including 660 V, issued as IEC 34-12
Part 13 Specification for mill auxiliary motors, issued as IEC 34-13
Part 14 Mechanical vibration of certain machines with shaft heights 56 mm and
higher - Measurement, evaluation and limits of the vibration severity, issued
as IEC 34-14
Part 15 Impulse voltage withstand levels of rotating a c machines with form-wound
stator coils, issued as IEC 34-15
Excitation systems for synchronous machines Chapter 1 Definitions, issued
Part 16-1
as IEC 34-16-1
Part 16-2 Excitation systems for synchronous machines Chapter 2 Models for system
studies, issued as IEC 34-16-2
Part 18-1 Functional evaluation of insulation systems - Section 1 General guidelines,
issued as IEC 34-18-1
Part 18-21 Functional evaluation of insulation systems - Section 21 Test procedures
for wire-wound windings - Thermal evaluation and classification, issued as
IEC 34-18-21
Part 18-31 Functional evaluation of insulation systems - Section 31 Test procedures
for form-wound windings - Thermal evaluation and classification of insula-
tion systems used in machines up to and including 50 MVA and 15 kV,
issued as IEC 34-18-31
Annex A is for information only

34-7 © IEC - 9 -
ROTATING ELECTRICAL MACHINES
Part 7 Classification of types of construction
and mounting arrangements (IM Code)
SECTION 1 SCOPE AND DEFINITIONS
11 Scope
This part of IEC 34 specifies the IM code, a classification of types of construction and
mounting arrangements of rotating electrical machines
Two systems of classification are provided as follows
An alpha-numeric designation applicable to machines Code 1 (see section 2)
with endshield bearing(s) and only one shaft extension
An all-numeric designation applicable to a wider range of Code II (see section 3)
types of machines including types covered by Code I
The type of machine not covered by Code II should be fully described in words
The relationship between Code I and Code II is given in annex A
12 Definitions
of IEC 34, the following definitions apply
rt
For the purposes of this pa
The arrangement of machine components with regard to
1 2 1 type of construction:
fixings, bearing arrangement and shaft extension (IEV 411-13-34)*
The orientation on site of the machine as the whole with
2 2 mounting arrangement:
regard to shaft alignment and position of fixings (IEV 411-13-35)
ion of a shaft extending beyond an extreme bearing
A po rt
1 2 3 shaft extension:
(IEV 411-13-07)
NOTE - The bearing may be on the machine itself or be part of an assembly comprising a machine and
(an) additional bearing(s)
IEC 50 (411) 1973 International Electrotechnical Vocabulary (IEV), Chapter 411 Rotating machines

34-7 © I EC -11 -
1 2 4 drive-end of a machine (D-end): That end of the machine which accomodates the
shaft end (IEV 411-13-36)
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
Machine with two shaft extensions of different diameter the end with the larger
a)
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 34-8 if applicable, otherwise by
agreement
NOTE - The outer diameter of a forged on flange is taken to be the diameter of the shaft extension
1 2 5 non-drive end of the machine (N-end): That end of the machine opposite to the
drive end (IEV 411-13-37)
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 (Inter-
national Mounting), followed by a space, the letter B and one or two numerals, as shown
in table 1
34-7 © I EC - 13 -
Table 1 - Designations for machines with horizontal shafts (IM B )
Type of construction
Mounting
Desig- Number
Sketch arrangement
nati of end- Feet Flange Other details
on
(Horizontal shaft)
shield
bearings
With Mounted by feet,
feet down
IM B3 2 feet
With Endshield flange at Mounted on D end
IM B5 — 2 _ flange D end with access side of flange
sl
to back
I, With Mounted by feet,
IM B6 feet – feet left
;p 2
–
,,
(viewed from D end)
With
Mounted by feet,
IM B7 `p 2 feet _
_ feet right
,, (viewed from D end )
^^^' With Mounted by feet
IM B8 feet _ feet up
2 _
No endshield or Mounted on end face
of frame at D end
IM B 1 _ _ bearing at D end
mil
Special flange Mounted on D-end
With
IM B10 2 _ flange at D end side of flange
With
Endshield spigot Mounted on D-end
IM B14 2 flange No access to back side of flange
2:1111111
Flange at D-end
34-7 © IEC - 15 -
Type of construction
Mounting
Desig
Number
arrangement
Sketch
nation of end Feet Flange Other details
(Horizontal shaft)
shield
bearings
No endshield or Mounted by feet, feet
With
bearing at D end down, with additional
IM B15 1 feet
mounting on end face
– Additional mounting
provisions on D end of frame
of frame
Mounted by feet,
With
feet down
1M B20 raised
feet
Endshield flange at Mounted by feet, feet
With With
D end with access down, with additional
IM 825 flange
2 raised
to back mounting on flange
— feet
3 or 4 pads on
IM B30 2
– – endshield(s) Pad mounted
s
or frame
Endshield spigot Mounted by feet, feet
With
With
down, with additional
No access to back
IM B34 2 feet flange
Flange at D end mounting on D-end
side of flange
Mounted by feet, feet
With Endshield flange
With
down, with additional
at D end
IM B35 2 feet flange
mounting on D-end
with access to back
side of flange
-17 -
34-7 ©IEC
2 2 Designation of machines with vertical shafts
In Code I, a machine with a ve rtical shaft is designated by the Code letters IM (Inter-
national Mounting) followed by a space, the letter V and one or two numerals, as shown in
table 2
Table 2 - Designations for machines with ve rtical shafts (IM V )
Type of construction
Mounting
Desig Number
Sketch arrangement
of end Feet Flange Other details
nation
(Vertical shaft)
shield
bearings
•
Endshield flange at Mounted on D end
With
IM V1 i 2 _ flange D end with access side of flange
to back D end down
Ii
I With Endshield flange at Mounted on N end
IM V2 2 _ flange N end with access side of flange,
to back D end up
^I♦
III ∎:
With
Endshield flange at Mounted on D end
flange
IM V3 2 D end with access
side of flange,
! —
to back
D end up
•
Endshield flange at Mounted on N end
• With
N end with access side of flange,
IM V4 • _ flange
to back D end down
ii
Mounted by feet,
With
D end down
_
IM V5 2 feet _
j
II
H
With
...