標準號：IS 9589-1980
發布日期：1980/12/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍： This standard specifies the technical requirements for the railway signalling lamps given in Table 1 and the methods of test to be used for determining their quality and interchangeability.TABLE 1 RANGE OF LAMPS COVEREDReference No. Use(1) (2)SL 5 Repeaters and indicators, Multi-lamp route indicators with parallelconnection SL 13 Multi-lamp route indicators with series connection SL 16 Searchlight signalsSL 18 Multiple aspect colour light signals SL 21 Direction type route indicatorsSL 33 Direction type route indicatorsSL 35 Multiple aspect colour light signalsNote — The lamps are designated by the reference numbers set out in the table which also gives their usual application. The letters ' SL ' signify ' Signalling Lamps '.