IEC 60613:2010

IEC 60613 ®
Edition 3.0 2010-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical and loading characteristics of X-ray tube assemblies for medical
diagnosis
Caractéristiques électriques et de charge des gaines équipées pour diagnostic
médical
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IEC 60613 ®
Edition 3.0 2010-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical and loading characteristics of X-ray tube assemblies for medical
diagnosis
Caractéristiques électriques et de charge des gaines équipées pour diagnostic
médical
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
S
CODE PRIX
ICS 11.040.50 ISBN 978-2-88910-235-8
– 2 – 60613 © IEC:2010
CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references .5
3 Terms and definitions .5
4 Presentation of the electrical characteristic .8
4.1 X-RAY TUBE VOLTAGE .8
4.2 NOMINAL X-RAY TUBE VOLTAGE .8
4.3 X-RAY TUBE CURRENT.8
4.4 CATHODE EMISSION CHARACTERISTIC.8
4.5 ENVELOPE characteristics.9
4.5.1 ENVELOPE CURRENT .9
4.5.2 ENVELOPE VOLTAGE .9
5 LOADING of an X-RAY TUBE.9
5.1 LOADING TIME .9
5.1.1 Units.9
5.1.2 Measurement.9
5.2 CYCLE TIME .9
6 Input power .9
6.1 ANODE INPUT POWER.9
6.2 NOMINAL ANODE INPUT POWER .9
6.3 NOMINAL RADIOGRAPHIC ANODE INPUT POWER .10
6.4 NOMINAL CT ANODE INPUT POWER .10
6.5 X-RAY TUBE ASSEMBLY INPUT POWER .10
6.6 NOMINAL CONTINUOUS INPUT POWER.10
6.7 CONTINUOUS ANODE INPUT POWER .10
6.8 CT SCAN POWER INDEX (CTSPI).10
6.9 NOMINAL CT SCAN POWER INDEX (NOMINAL CTSPI) .10
7 RADIOGRAPHIC RATINGS.10
7.1 General .10
7.2 SINGLE LOAD RATING .10
7.3 SERIAL LOAD RATING .10
8 Presentation of data .11
Annex A (informative) Rationale and historical background.12
Annex B (informative) Measurement of the X-RAY TUBE CURRENT.17
Bibliography.18
Index of defined terms .19

Figure A.1 – Example: SINGLE LOAD RATING chart showing CTSPI calculation area for
scan time interval of 1 s to 25 s .14
Figure A.2 – Example: SINGLE LOAD RATING curves for two different CT tubes, both
having the same value of NOMINAL CT ANODE INPUT POWER .15
Figure B.1 – Electrical schematic of X-RAY TUBE CURRENT measurement .17

60613 © IEC:2010 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL AND LOADING CHARACTERISTICS
OF X-RAY TUBE ASSEMBLIES FOR MEDICAL DIAGNOSIS

FOREWORD
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International Standard IEC 60613 has been prepared by subcommittee 62B: Diagnostic
imaging equipment, of IEC technical committee TC 62: Electrical equipment in medical
practice.
This third edition cancels and replaces the second edition of IEC 60613, published in 1989. It
constitutes a technical revision. This third edition has been adapted to apply to the
present technology.
The text of this standard is based on the following documents:
FDIS Report on voting
62B/774/FDIS 62B/780/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – 60613 © IEC:2010
In this standard, the following print types are used:
– requirements and definitions: roman type.
– informative material appearing outside of tables, such as notes, examples and references: in smaller type.
Normative text of tables is also in a smaller type;
– TERMS DEFINED IN CLAUSE 3 OF THIS STANDARD OR AS NOTED: SMALL CAPS.
The committee has decided that the conten
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