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sklademVydáno: 1969-03-20
BS 787-1:1969
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)
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| Označení normy: | BS 787-1:1969 |
| Počet stran: | 22 |
| Vydáno: | 1969-03-20 |
| ISBN: | 0 580 05077 7 |
| Status: | Standard |
DESCRIPTION
BS 787-1:1969
This standard BS 787-1:1969 Specification for mining type flameproof gate-end boxes is classified in these ICS categories:
- 29.260.20 Electrical apparatus for explosive atmospheres
- 29.130.20 Low voltage switchgear and controlgear
This British Standard specifies requirements for flameproof gate-end boxes designed primarily for use, in the mining industry, on 3-phase a.c. circuits up to 650 V, for direct-on-line contactor starting and for the protection of coalcutters, conveyors, loaders and the like.
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.