Specification for mining type flameproof gate-end boxes-Gate-end boxes for direct-on-line motor starting (for use on 3-phase a.c. circuits up to 650 V)
矿用隔爆门端箱规范
For boxes with a range of three current ratings, having air-break electrically operated contactor which, with associated equipment, provides for control and protection of coalface machinery. Design and construction; attachment of cables; coupling of units; means of isolation; main contactor; test methods.Cross References:BS 88BS 159BS 229BS 279BS 350BS 542BS 587BS 775BS 1259BS 3101BS 3454Replaces BS 787:Part 1:1965.