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Homepage>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)

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.

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