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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)
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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.