IEC 60310-2004 pdf – Railway applications – Traction transformers and inductors on board rolling stock.
1 Scope This International Standard applies to traction transformers installed on board rolling stock and to the various types of inductors inserted in the power and auxiliary circuits of electric vehicles. NOTE 1 The term “inductor” is used in this standard with the same meaning as the term “reactor” mentioned in IEC 60050(421), IEC 60050(811) and IEC 60289. The inductors mentioned in the first paragraph may be: – filter inductors; – smoothing inductors; – commutation inductors; – protection inductors in static power convertors; – inductive shunts for traction motors; – inductors used for transition between tap changer notches; – braking circuit inductors; – interference suppression inductors. NOTE 2 The requirements of IEC 60076 are applicable to traction transformers where they do not conflict with this standard, or with the specialized IEC publications dealing with traction applications. NOTE 3 For transformers and inductors for static power convertors, reference should also be made to IEC 61287. This standard can also be applied, after agreement between user and manufacturer, to the traction transformers of three-phase a.c. line-side powered vehicles and to the transformers inserted in the single-phase or polyphase auxiliary circuits of vehicles, except for instrument transformers and transformers of a rated output below 1 kVA single-phase or 5 kVA polyphase. This standard does not cover accessories such as tap changers, resistors, heat exchangers, fans, etc., intended for mounting on the transformers or inductors, which shall be tested separately according to relevant rules. When tap changers are an integral part of the transformers, they cannot be separated while the latter are tested. For service conditions, refer to IEC 60077-1, Clause 7. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document
IEC 60076-1:1993, Power transformers – Part 1: General IEC 60076-2:1993, Power transformers – Part 2: Temperature rise IEC 60076-3:2000, Power transformers – Part 3: Insulation levels, dielectric tests and external clearances in air IEC 60076-5:2000, Power transformers – Part 5: Ability to withstand short circuit IEC 60077-1:1999, Railway applications – Electric equipment for rolling stock – Part 1: General service conditions and general rules IEC 60085:1984, Thermal evaluation and classification of electrical insulation IEC 60289:1988, Reactors IEC 60850:2000, Railway applications – Supply voltage of traction systems IEC 61133:1992, Electric traction – Rolling stock – Test methods for electric and thermal/electric rolling stock on completion of construction and before entry into service IEC 61287-1:1995, Power convertors installed on board rolling stock – Part 1: Characteristics and test methods IEC 61373:1999, Railway applications – Rolling stock equipment – Shock and vibration tests 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60076 and IEC 60289 together with the following definitions apply. 3.1 Definitions for transformers 3.1.1 classification of transformers depending on arrangements made for on-load variation of the secondary voltage of the traction circuits, traction transformers can be classified as: – fixed ratio transformers; – transformers with low-voltage tapping; – transformers with high-voltage tapping. 3.2 Definitions for inductors 3.2.1 classification of inductors according to their utilisation, inductors can be classified as follows: – Inductors for alternating current Inductors that carry alternating current, such as transition inductors used for transition between tappings of tap changers, inductors for a.c. commutator motor braking circuits, interference suppression inductors, etc.
5.2 Rated secondary voltage The rated voltage of a secondary winding of a transformer is the r.m.s. no-load voltage at the terminals of the winding when the principal tapping of the line-side winding of the transformer is fed at its rated voltage and frequency. 6 Rated power Traction transformers usually have several secondary windings (e.g. traction, auxiliaries, train heating). The specification of the transformer shall indicate the rated power, in kilovolt- amperes, of each winding defined as the product of the rated voltage of this winding and its rated current. The rating of a transformer is referred to a continuous duty.