IEC 60061-3:1969/AMD20:1998

SLOVENSKI STANDARD
01-marec-2001
Dimensions and output series for rotating electrical machines - Part 2: Frame
numbers 355 to 1000 and flange numbers 1180 to 2360
Dimensions and output series for rotating electrical machines - Part 2: Frame numbers
355 to 1000 and flange numbers 1180 to 2360
Dimensions et séries de puissances des machines électriques tournantes - Partie 2:
Désignation des carcasses entre 355 et 1000 et des brides entre 1180 et 2360
Ta slovenski standard je istoveten z: IEC 60072-2
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
IEC
INTERNATIONALE
60072-2
INTERNATIONAL
Première édition
STAN DARD
First edition
1990-12
Dimensions et séries de puissances
des machines électriques tournantes
Partie 2:
Désignation des carcasses entre 355 et 1000 et
des brides entre 1180 et 2360
Dimensions and output series for rotating
electrical machines
Part 2:
Frame numbers 355 to 1000 and flange
numbers 1180 to 2360
réservés — Copyright - all rights reserved
© IEC 1990 Droits de reproduction
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72-2 © I E C
CONTENTS
Page
FOREWORD 5
INTRODUCTION
Clause
1 Scope 9
2 Letter-symbols for dimensions 9
11 3 Designation of machines
11 3.1 Foot-mounted machines
3.2 Flange-mounted machines
3.3 Foot- and flange-mounted machines
4 Fixing dimensions
4.1 Shaft heights
4.2 A dimensions
4.3 B dimensions
4.4 C dimensions
4.5 Mounting flange dimensions
5 Shaft extension dimensions, keys and keyways. Greatest permissible torques on continuous
duty for a.c. motors
21 6 Preferred rated output values
7 Dimensional sketches
21 7.1 Principal dimensions, machines with undefined shape and with feet down
7.2 Principal dimensions, machines with undefined shape and with feet up
7.3 Principal dimensions, machines with defined shape and with feet down
7.4 Shaft extension dimensions
7.5 Principal dimensions, machines with defined shape and with mounting flange, with
spigot
7.6 Principal dimensions, machines with defined shape and with mounting flange, without
spigot
– 5 –
72-2 ©IEC
INTERNATIONAL ELECTROTECHNICAL COMMISSION
DIMENSIONS AND OUTPUT SERIES FOR ROTATING
ELECTRICAL MACHINES
Part 2: Frame numbers 355 to 1000 and flange numbers 1180 to 2 360
FOREWORD
The formal decisions or agreements of the IEC on technical matters, prepared by Technical Committees on which all the
1)
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 and they are accepted by the National Committees in that sense.
2)
3) In order to promote international unification, the IEC expresses the wish that all National Committees should adopt the
text of the IEC recommendation for their national rules in so far as national conditions will permit. Any divergence between
the I EC recommendation and the corresponding national rules should, as far as possible, be clearly indicated in the latter.
This part of the International Standard I E C 72 has been prepared by Sub-committee 2B: Mounting
dimensions and output series, of IEC Technical Committee No. 2: Rotating machinery.
It replaces IEC 72A published in 1970.
The text of this part is based on the following documents:
Report on Voting
Six Months' Rule
2B(CO)72
2B(CO)69
Full information on the voting for the approval of this part can be found in the Voting Report indicated
in the above table.
The following publications are quoted in this part of IEC 72:
I EC 34-8: 1972, Rotating electrical machines — Part 8: Terminal markings and direction of rotation of rotating
machines.
IEC 72-1: 1990, Dimensions and output series for rotating electrical machines — Part 1: Frame numbers 56 to 400 and
flange numbers 55 to 1080.
ISO 496: 1973, Driving and driven machines — Shaft heights.
ISO 1101: 1983, Technical drawings — Geometrical tolerancing — Tolerancing of form, orientation, location and run-out
— Generalities, definitions, symbols, indications on drawings.

72-2 ©IEC — 7
INTRODUCTION
I E C 72-1 contains standard values for shaft-heights, fixing dimensions, shaft extensions, maximum
permissible torques and outputs for machines with shaft-heights from 56 mm to 400 mm.
However, the variety of constructions and the wide range of applications for the large machines with
shaft-heights above 315 mm have led to the establishment of a relatively large number of values for
the dimensions in order to cover all possible constructions. Owing to this, the present part covers a
wider range than I E C 72-1 within which, range values suitable for all designs or for a more detailed
standardization can be chosen.
Thus, the mounting dimensions given in this part for shaft-heights 355 mm and 400 mm have been
chosen from values given in IEC 72-1.

72-2©IEC – 9 –
DIMENSIONS AND OUTPUT SERIES FOR ROTATING
ELECTRICAL MACHINES
Part 2: Frame numbers 355 to 1000 and flange numbers 1180 to 2 360
1 Scope
This part of IEC 72 relates to all kinds of rotating electrical machines with a horizontal shaft, and
with any one of three specific types of foot mounting — i.e. machines with feet down, machines with
feet up, and machines for which the bed-plate is an integral part — and with mounting flange for which
the shaft height in the feet down version is between 355 mm and 1000 mm and pitch circle diameter
of fixing holes between 1180 and 2 360 mm.
2 Letter-symbols for dimensions
The symbols defined below are illustrated by the dimensional sketches in clause 7.
A — distance between centre-lines of fixing holes (end view).
AA — width of the end of the foot (end view).
AB — overall dimension across the feet (end view).
AC — diameter of the machine.
AD — distance from the centre-line of the machine to extreme outside of the terminal box or other
most salient part mounted on the side of the machine.
B — distance between the centre-lines of the fixing holes (side view).
BA — length of the foot (side view).
BB — overall dimension across the feet (side view).
distance from the shoulder on the shaft at D-end to the centre-line of the mounting holes
C —
in the nearest feet.
distance from the shoulder on the shaft at N-end to the centre-line of the mounting holes
CA —
in the nearest feet.
D — diameter of the shaft extension at D-end.
DA — diameter of the shaft extension at N-end.
length of the shaft extension from the shoulder at D-end.
E —
EA — length of the shaft extension from the shoulder at N-end.
F — width of the keyway of shaft extension at D-end.
FA — width of the keyway of the shaft extension at N-end.
G — distance from the bottom of the keyway to the opposite surface of the shaft extension at
D-end.
distance from the top of the key to the opposite surface of the shaft extension at
GA —
D-end.
distance from the bottom of the keyway to the opposite surface of the shaft extension at
GB —
N-end.
GC — distance from the top of the key to the opposite surface of the shaft extension at
N-end.
GD — thickness of the key of the shaft extension at D-end.
GE — depth of the keyway at the crown of the shaft extension at D-end.

72-2 ©IEC — 11 —
GF — thickness of the key of the shaft extension at N-end.
GH — depth of the keyway at the crown of the shaft extension at N-end.
distance from the centre-line of the shaft to the bottom of the feet (basic dimension).
H —
H' — distance from the centre-line of the shaft to the mounting surface — e.g. the bottom of the
feet — in the feet-up version.
HA — thickness of the feet.
distance from the top of the horizontal machine to the bottom of the feet.
HC —
distance from the top of the lifting eye, the terminal box or other most salient part mounted
HD —
on the top of the machine to the bottom of the feet.
distance from the mounting surface to the lowest part of the machine in the feet-up
HE —
version.
K diameter of the holes or width of the slots in the feet of the machine.
overall length of the machine with a single shaft extension.
L
LA tickness of the flange.
distance from the mounting surface of the flange to the end of the machine.
LB
LC overall length of the machine when there is a shaft extension at N-end.
M — pitch circle diameter of the fixing holes.
N diameter of the spigot.
— outside diameter of the flange, or in the case of a non-circular outline twice the maximum
P
radial dimension.
R — distance from the mounting surface of the flange to the shoulder on the shaft.
— diameter of the fixing holes in the mounting flange or nominal diameter of the thread.
S
I depth of the spigot.
NOTE — The designation of D and N-end of a machine is given in IEC
...