IEC 61991:2000 pdf download.Railway applications – Rolling stock – Protective provisions against electrical hazards
1 Scope
IEC 61 991 offers a set of rules that are applied in the design and manufacture of electrical
installations and equipment to be used on rolling stock so as to protect the persons from
electric shocks.
The methods used to satisfy the rules may differ, in accordance with the procedures and
practices of the operating organization.
IEC 61 991 is applicable to vehicles of rail transport systems, road vehicles powered by an
external supply (trolley buses), magnetic levitated vehicles and to the electrical equipment
installed in these vehicles.
This standard does not apply to
– mine railways in underground mines;
– crane installations, moving platforms and similar transport systems on rails;
– funicular railways;
– temporary constructions.
Testing of vehicles against the requirements of IEC 61 991 is not included. For this, refer
to IEC 61 1 33.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of IEC 61 991 . For dated references, subsequent amendments to, or
revisions of, any of these publications do not apply. However, parties to agreements based on
IEC 61 991 are encouraged to investigate the possibility of applying the most recent editions of
the normative documents indicated below. For undated references, the latest edition of the
normative document referred to applies. Members of IEC and ISO maintain registers of
currently valid International Standards.
IEC 60077-1 ,— Railway applications – Electric equipment for rolling stock – Part 1 : General
service conditions and general rules 1 )
IEC 60364 (all parts), Electrical installations of buildings
IEC 60364-4-41 :1 992, Electrical installations of buildings – Part 4: Protection for safety –
Chapter 41 : Protection against electric shock
IEC 60439 (all parts), Low-voltage switchgear and controlgear assemblies
IEC 60479-1 :1 994, Effects of current on human beings and livestock – Part 1 : General aspects
IEC 60529:1 989, Degrees of protection provided by enclosures (IP Code)
IEC 60536 (all parts), Classification of electrical and electronic equipment with regard to
protection against electric shock
IEC 60850,— Railway applications – Supply voltages of traction systems 1 )
IEC 61 31 0-1 :1 995, Safety of machinery – Indication, marking and actuation – Part 1 :
Requirements for visual, auditory and tactile signals
IEC 621 28,— Railway applications – Protective provisions against electrical hazards – Electric
equipment for fixed installations 1 )
3 Definitions
For the purposes of IEC 61 991 , the following definitions apply. For more information relating to
definitions of parts of the fixed installations, refer to IEC 621 28 from which these definitions are
derived.
NOTE In order to avoid risks of misunderstanding, definitions used in the text are written in italics.
3.1 Definitions concerning persons involved
3.1 .1 skilled person
person who can judge the work assigned to him and recognize possible dangers on the basis
of his professional training, knowledge and experience and of his knowledge of the relevant
requirements
3.1 .2 instructed person
person informed about the tasks assigned to him and about possible dangers involved in
neglectful behaviour and who, if necessary, has been given a degree of training
3.1 .3 ordinary person
any person who cannot be defined either as a skilled person or as an instructed person
3.2 Other definitions
3.2.1 closed electrical operating area
any room or location which serves exclusively for the operation of electrical equipment and is
kept secure by a means appropriate to the voltage and location
NOTE 1 Access to such areas is permitted only to skilled persons and instructed persons .
NOTE 2 The definition of closed electrical operating area can be suitable for underfloor or upper roof cabinets.
Generally speaking it is any location (inside or outside the car body) which is kept secure because of the voltage that can assume the equipment inside it. Access to such areas is not allowed to ordinary persons .
3.2.2 contact line
conductor system for supplying electrical energy to vehicles through current-collecting
equipment
IEC 61991:2000 pdf download
