IEC 61991 pdf download RAILWAY APPLICATIONS– ROLLING STOCK – Protective provisions against electrical hazards
IEC 61991 offers a set of rules that are applied in the design and manufacture of electricalinstallations and equipment to be used on rolling stock so as to protect the persons fromelectric shocks.
The methods used to satisfy the rules may differ，in accordance with the procedures andpractices of the operating organization.
IEC 61991 is applicable to vehicles of rail transport systems，road vehicles powered by anexternal supply (trolley buses)，magnetic levitated vehicles and to the electrical equipmentinstalled in these vehicles.
This standard does not apply to
– mine railways in underground mines;
crane installations, moving platforms and similar transport systems on rails;
Testing of vehicles against the requirements of lEC 61991 is not included.For this，referto lEC61133.
The following normative documents contain provisions which，through reference in this text,constitute provisions of IEC 61991.For dated references,subsequent amendments to,orrevisions of, any of these publications do not apply. However, parties to agreements based onIEC 61991 are encouraged to investigate the possibility of applying the most recent editions ofthe normative documents indicated below. For undated references， the latest edition of thenormative document referred to applies. Members of lEC and lsO maintain registers ofcurrently valid lnternational Standards.
IEC 60077-1,— Railway applications – Electric equipment for rolling stock – Part 1: Generalservice conditions and general rules 1)
IEC 60364(all parts)，Electrical installations of buildings
IEC 60364-4-41:1992，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 60479-1:1994,Effects of current on human beings and livestock – Part 1: General aspectsIEC 60529:1989，Degrees of protection provided by enclosures (IP Code)
IEC 60536 (all parts)，Classification of electrical and electronic equipment with regard toprotection against electric shock
IEC 60850,— Railway applications – Supply voltages of traction systems 1)
IEC 61310-1:1995,Safety of machinery – Indication，marking and actuation – Part 1:Requirements for visual,auditory and tactile signals
IEC 62128,— Railway applications – Protective provisions against electrical hazards – Electricequipment for fixed installations 1′)
For the purposes of lEC 61991, the following definitions apply.For more information relating todefinitions of parts of the fixed installations,refer to lEC 62128 from which these definitions arederived.
NOTE In order to avoid risks of misunderstanding, definitions used in the text are written in italics.
3.1 Definitions concerning persons involved
person who can judge the work assigned to him and recognize possible dangers on the basisof his professional training，knowledge and experience and of his knowledge of the relevantrequirements
person informed about the tasks assigned to him and about possible dangers involved inneglectful behaviour and who, if necessary, has been given a degree of training
any person who cannot be defined either as a skilled person or as an instructed person
closed electrical operating area
any room or location which serves exclusively for the operation of electrical equipment and iskept secure by a means appropriate to the voltage and location
NOTE1 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 voltagethat can assume the equipment inside it.Access to such areas is not allowed to ordinary persons.