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Hlavní stránka>BS 787-4:1972 Specification for mining type flameproof gate-end boxes Gate-end boxes for drilling machines (for use on 3-phase a.c. circuits up to 650 V)
sklademVydáno: 1972-01-25
BS 787-4:1972 Specification for mining type flameproof gate-end boxes Gate-end boxes for drilling machines (for use on 3-phase a.c. circuits up to 650 V)

BS 787-4:1972

Specification for mining type flameproof gate-end boxes Gate-end boxes for drilling machines (for use on 3-phase a.c. circuits up to 650 V)

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Označení normy:BS 787-4:1972
Počet stran:18
Vydáno:1972-01-25
ISBN:0 580 06867 6
Status:Standard
Popis

BS 787-4:1972


This standard BS 787-4:1972 Specification for mining type flameproof gate-end boxes is classified in these ICS categories:
  • 29.130.20 Low voltage switchgear and controlgear
  • 29.260.20 Electrical apparatus for explosive atmospheres

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 controlling one or two electrically-operated drilling machines.

NOTE The titles of the British Standards referred to in this standard are listed on page ii.


For controlling electrically operated drilling machines. Service conditions; ratings, design, construction and means of protection; test requirements.
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