標準號：IS 7788-1975
發布日期：1976/2/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：1.1 This standard applies to converters using semiconductor diodes intended for service on single-phase rolling stock supplied with current of frequency between 15 Hz and 60 Hz.Note 1 — This standard has been drawn for convertors supplying vehicle traction circuits; it also applies in principle to convertors provided for feeding the auxiliary services of those vehicles.Note 2 —The general requirements of semiconductor convertor units covered bv this specification shall generally be governed by IS : 3895-1966* and IS ; 4549-19681〓.'1.1.1 Power convertors covered by this specification may be used as:a) the power convertor feeding traction motors on 50 Hz ac locomotives and electrical multiple units; andb) Auxiliary convertor feeding auxiliary motors or auxiliary circuits on traction vehicles.1.2 This specification does not apply to the following:a) Single and multiphase power convertor used for traction sub-station,b) Single or multiphase power convertor for industrial application, andc) Single and multiphase auxiliary convertor for general application.