. American engineer and railroad journal . FIG. 11. r£3T NaIZ3t> 13. HP FOWEfl CoNi-UMRTtori. .32. :. TimeFIG. 16. ciety, the speed control in these shops is obtained by meansof the multi-voltage system. The horse power required by themachine was determined partly by general considerations andpartly by the formula stated above, HP = KW, where K hada value of for hard steels and for soft steels. Fromdata given on previous pages, it may be seen that the size ofthis constant was on the safe side. All machines are pro-tected by both circuit breaker and fuses; t
. American engineer and railroad journal . FIG. 11. r£3T NaIZ3t> 13. HP FOWEfl CoNi-UMRTtori. .32. :. TimeFIG. 16. ciety, the speed control in these shops is obtained by meansof the multi-voltage system. The horse power required by themachine was determined partly by general considerations andpartly by the formula stated above, HP = KW, where K hada value of for hard steels and for soft steels. Fromdata given on previous pages, it may be seen that the size ofthis constant was on the safe side. All machines are pro-tected by both circuit breaker and fuses; the size of the break-er was, in general, 4 amperes per rated horse power of themotor and it was set at the limit of 50 per cent, above thisrating, the breaker would therefore fly out when the powerconsumption was approximately 100 per cent, overload. Onreciprocating tools, the circuit breaker was set 40 to 50 percent, higher. The enclosed fuses used had a rating the sameas that at which the circuit breakers were set. After the plant was in operation a large number of testswere made, every machine listed being tested to see w
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
