IEC 63267-2-1

Fibre optic interconnecting devices and passive components – Connector optical interfaces for enhanced macro bend multimode fibres – Part 2-1: Connection parameters of physically contacting 50 µm core diameter fibres– Non-angled

IEC 63267-2-1: 2023 defines a set of specified conditions for an enhanced macro bend of 50/125 µm, graded index multimode fibre optic connection that is maintained in order to satisfy the requirements of attenuation and return loss performance in a randomly mated pair of polished physically contacting (PC) fibres. An encircled flux (EF) compliant launch condition in accordance with IEC 61300-1, at an operational wavelength of 850 nm, is used for determination of performance grades, based on lateral fibre core offset, numerical aperture (NA) mismatch, and fibre core diameter (CD) variation. Fibre core angular offset is considered insignificant given the state-of-the-art and is excluded as a factor for attenuation estimation. Attenuation and return loss performance grades are defined in IEC 63267-1.

Dispositifs d'interconnexion et composants passifs fibroniques – Interfaces optiques de connecteurs pour fibres multimodales améliorées en macrocourbures – Partie 2-1 : Paramètres de connexion des fibres d'un diamètre de cœur de 50 µm en contact physique– sans angle

IEC 63267-2-1: 2024 définit un ensemble de conditions spécifiées pour les connexions fibroniques multimodales à gradient d’indice, de 50/125 µm améliorées en macrocourbures, afin de satisfaire aux exigences de performance d'affaiblissement et d'affaiblissement de réflexion dans une paire à accouplement sans choix préalable de fibres polies à contact physique (PC). Une condition d’injection conforme au flux inscrit (EF, encircled flux) selon l’IEC 61300‑1, à une longueur d’onde de fonctionnement de 850 nm, est utilisée en vue de déterminer les classes de performances, fondées sur le décalage latéral du cœur de la fibre, la désadaptation de l'ouverture numérique (NA, numerical aperture) et la variation du diamètre du cœur de la fibre (CD, core diameter). Le décalage angulaire du cœur de la fibre est considéré comme négligeable compte tenu de l'état de l’art et il est exclu à titre de facteur pour l'estimation de l'affaiblissement. Les classes d'affaiblissement et d'affaiblissement de réflexion sont définies dans l’IEC 63267‑1.

Dimensions and output series for rotating electrical machines - Part 1: Frame numbers 56 to 400 and flange numbers 55 to 1080

General Information

• Status: Published
• Publication Date: 02-Feb-2023
• ICS: 29.160 - Rotating machinery
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: SC 86B - Fibre optic interconnecting devices and passive components
• Ref Project: SIST IEC 60072-1:2001 - Dimensions and output series for rotating electrical machines - Part 1: Frame numbers 56 to 400 and flange numbers 55 to 1080

Standards Content (Sample)

SLOVENSKI STANDARD
SIST IEC 60072-1:2001
01-marec-2001
Dimensions and output series for rotating electrical machines - Part 1: Frame
numbers 56 to 400 and flange numbers 55 to 1080
Dimensions and output series for rotating electrical machines - Part 1: Frame numbers
56 to 400 and flange numbers 55 to 1080
Dimensions et séries de puissances des machines électriques tournantes - Partie 1:
Désignation des carcasses entre 56 et 400 et des brides entre 55 et 1080
Ta slovenski standard je istoveten z: IEC 60072-1
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
SIST IEC 60072-1:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST IEC 60072-1:2001

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SIST IEC 60072-1:2001
NORME CEI
INTERNATIONALE IEC
72-1
INTERNATIONAL
Sixième édition
STANDARD Sixth edition
1991-02
Dimensions et séries de puissances
des machines électriques tournantes
Partie 1:
Désignation des carcasses entre 56 et 400
et des brides entre 55 et 1080
Dimensions and output series for
rotating electrical machines
Part 1:
Frame numbers 56 to 400 and
flange numbers 55 to 1080
© CEI 1991 Droits de reproduction réservés — Copyright — all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun pro- any form or by any means, electronic or mechanical,
cédé, électronique ou mécanique, y compris la photocopie et includng photocopying and microfilm, without permissioni
les microfilms, sans l'accord écrit de l'éditeur. in writing from the publisher.
Bureau Central de la Commission Electrotechnique Inte rnationale 3, rue de Varembé Genève, Suisse
Commission Electrotechnique Internationale
CODE PRIX "^
International Electrotechnical Commission
PRICE CODEPRICE CODE
IEC MemityliapoAHaa 3ne,rpoTexiimecHaR
KoMNCCNA
Pour prix, voir catalogue en vigueur
For price, see current catalogue

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SIST IEC 60072-1:2001
72-1 © CEI — 3 —
CONTENTS
Page
FOREWORD 5
Clause
1. Scope 7
2. Letter-symbols for dimensions 7
9
3. Designation of machines
11
4. Location of the terminal box
11
4.1 Machines with feet
4.2 Machines with flange only 11
Position of holes in the mounting flange 11
5.
11
6. Fixing dimensions
6.1 Foot-mounted machines 11
6.2 Flange-mounted machines 17
Shaft extension, keys and keyways dimensions. Greatest permissible torques on continuous
7.

duty for a.c. motors 19
8. Tolerances for flange-mounted machines 21
8.1 Shaft extension run-out 21
8.2 Concentricity of spigot diameter and perpendicularity of mounting face of flange to
shaft 23
Methods of measurement 23
8.3
8.3.1 Shaft extension run-out 23
8.3.2 Concentricity of spigot and shaft 25
25
8.3.3 Perpendicularity of mounting face of flange to shaft
Tolerances for machines other than flange-mounted machines 25
8.4
27
9. Preferred rated output values
31
10. Dimensional sketches
ANNEXES
A Guide for the selection of dimensions 33
B Reference planes and symbols for mounting dimensions of rotating electrical machines 45
C General requirements on tolerances and limit values for mounting dimensions 89
111
D Conversion millimetre/inches and kilowatt/horsepower

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SIST IEC 60072-1:2001
— 5 —
72-1 © IEC
INTERNATIONAL ELECTROTECHNICAL COMMISSION
DIMENSIONS AND OUTPUT SERIES
FOR ROTATING ELECTRICAL MACHINES
Part 1: Frame numbers 56 to 400 and flange numbers 55 to 1080
FOREWORD
1) The formal decisions or agreements of the IEC on technical matters, prepared by Technical Committees on which all the
National Committees having a special interest therein are represented, express, as nearly as possible, an international
consensus of opinion on the subjets dealt with.
2) They have the form of recommendations for international use and they are accepted by the National Committees in that sense.
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 IEC
recomendation and the corresponding national rules should, as far as possible, be clearly indicated in the latter.
This part of the International Standard IEC 72 has been prepared by Sub-Committee 2B: Mounting
dimensions and output series, of IEC Technical Committee No. 2 : Rotating machinery.
This sixth edition of IEC 72-1 replaces the fifth edition of IEC 72 (1971) and its Amendments Nos. 1
and 2, issued in 1977 and 1981 respectively.
The text of this part is based on the following documents:
Two Months' Procedure Reports on Voting
Six Months' Rule Reports on Voting
2B(CO)65
2B(CO)51 2B(CO)56 2
...