. Motion picture electricity. HALLBP Fig 112 On no volts, the economizer line wires are usually at-tached to terminals 1 and 2 for any voltage from 100 to105. On 1 and 3 for no volts, or to terminals 1 and 4if the line voltage should vary between 115 and 210. Ifthe economizer is made for 220 volts, then the line wiresare connected to 1 and 2 for 200 volts; on 1 and 3 for 210volts, or to 1 and 4 for 220 volts (see diagram Fig. 112). MOTION PICTURE ELECTRICITY 197 Some operators desire varying candlepower at the arcto accommodate lighter, or more dense films. In a caseof this kind, it is possibl
. Motion picture electricity. HALLBP Fig 112 On no volts, the economizer line wires are usually at-tached to terminals 1 and 2 for any voltage from 100 to105. On 1 and 3 for no volts, or to terminals 1 and 4if the line voltage should vary between 115 and 210. Ifthe economizer is made for 220 volts, then the line wiresare connected to 1 and 2 for 200 volts; on 1 and 3 for 210volts, or to 1 and 4 for 220 volts (see diagram Fig. 112). MOTION PICTURE ELECTRICITY 197 Some operators desire varying candlepower at the arcto accommodate lighter, or more dense films. In a caseof this kind, it is possible to simply install a 3-pole mainline cut-out (with one single fuse plug) connected to theeconomizer, as illustrated in Fig. 113. By simply putting TO tIHE. the plug in terminal No. 2, a heavy amperage is the plug and put it in. No. 3 and a medium cur-rent is secured, and for still less light, unscrew the plugand put it in terminal No. 4. This arrangement is exceed-ingly simple, cheap and practical and will never wear outor give trouble, and the plug can be instantly changedfrom one terminal to the other, giving three degrees ofamperes at the arc. If more than one plug should be inthe cut-out at one time the fuse will blow, because this 198 MOTION PICTURE ELECTRICITY short circuits few of the primary turns on the use but one plug in the cut-out. HALLBERG ALTERNATING CURRENTECONOMIZER DATA Lines Fuses Line Line Line Amperes Required Voltage Amperes Watts at Arc Regular Type— 30-40 Amperes 20 no 18 1,400 30-40 10 220 9 1,400 30-40 Standard Type — 45-55 Amperes 30 no 25 1,800 45-55 15 220 13 1,800 45-55 Special Type — 60-80 Amperes 40 no 35 2,200 60-80 20 220 18 2,200 60-80 Search-Light Type — 125-150
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