IEC 60322:2001 pdf Railway applications – Electric equipment for rolling stock – Rules for power resistors of open construction
1 Scope and object
This International Standard gives the rules for all power resistors (for example, braking,
heating, snubber and filter) used in the power and auxiliary circuits on board rolling stock
irrespective of the circuit and the type of vehicle where they are used.
These resistors are generally of open construction and are used in polluted areas. The
construction consists of resistor elements of grids, plates, strips, ribbons or wires.
NOTE Certain of these rules may, after agreement between user and manufacturer, be used for electrical equipment installed on other vehicles such as mine locomotives, trolley buses, etc.
This standard states
– the characteristics of the resistors;
– the service conditions with which the power resistors have to comply;
– the tests intended for confirming that these conditions have been met and the methods to
be adopted for these tests;
– the information to be marked on, or given with, the resistors.
This standard does not give requirements relating to general service conditions and general
rules which are given in IEC 60077-1 .
The object of this standard is to adapt the general rules given in IEC 60077-1 to power
resistors for rolling stock in order to obtain uniformity of requirements and tests throughout the
corresponding range of components and to avoid the need for testing to two different
standards.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this International Standard. For dated references, subsequent
amendments to, or revisions of, any of these publications do not apply. However, parties to
agreements based on this International Standard 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 60050(81 1 ):1 991 , International Electrotechnical Vocabulary (IEV) – Chapter 811: Electric
traction
IEC 60077-1 :1 999, Railway applications – Electric equipment for rolling stock – Part 1: General
service conditions and general rules
IEC 60364-4-41 :1 992, Electrical installations of buildings – Part 4: Protection for safety –
Chapter 41: Protection against electric shock
IEC 60943:1 998, Guidance concerning the permissible temperature rise for parts of electrical
equipment, in particular for terminals
IEC 61 1 33:1 992, Electric traction – Rolling stock – Test methods for electric and
thermal/electric rolling stock on completion of construction and before entry into service
IEC 61 373:1 999, Railway applications – Rolling stock equipment – Shock and vibration tests
3 Definitions
For the purpose of this International Standard, the definitions of IEC 60050(81 1 ) and the
following definitions apply.
3.1 resistor element
resistive conductor forming part of a resistor case or frame, usually in the form of grids, plates,
strips, ribbons or wires and which may have intermediate tappings
[IEV 81 1 -27-1 1 ]
NOTE A resistor element is usually a removable assembly.
3.2 resistor
general term used in this standard to designate any of the following forms of electrical
resistance
3.2.1 resistor case
resistor frame
set of resistor elements assembled into a single structure
[IEV 81 1 -27-1 2]
NOTE 1 Resistor case is used for resistors having one or more resistor elements installed in an enclosure intended to form part of a forced air cooling duct.
NOTE 2 Resistor frame is used for resistors having one or more resistor elements installed on a common frame for natural cooling in open air.
3.2.2 resistor section
resistive circuit contained between two terminals, dedicated to an electrical function and
connected to external equipment
[IEV 81 1 -27-1 4 modified.]
NOTE A resistor section may consist of a part or more than one resistor case or frame.
IEC 60322:2001 pdf Railway applications – Electric equipment for rolling stock – Rules for power resistors of open construction
