[Electric engineering.] . 7bL/ne 7b Transformer (a) Fig. 20. §14 ELECTRIC TRANSMISSION. 59 clips d, d engage with the terminals /, /, thus completingthe connection to the transformer primary. When a fuseis to be renewed, the porcelain base is pulled out and thelineman can replace the fuse without danger. 73. Fig. 21 shows a single-pole block made by the Stan-ley Company. In this case, the lid of the iron box is placedat the bottom and the fuse holder A is pulled out, thusbreaking connection with the terminals /, /. The fuse g. Fig. 21. runs through a block of wood h, thus confining the arcand
[Electric engineering.] . 7bL/ne 7b Transformer (a) Fig. 20. §14 ELECTRIC TRANSMISSION. 59 clips d, d engage with the terminals /, /, thus completingthe connection to the transformer primary. When a fuseis to be renewed, the porcelain base is pulled out and thelineman can replace the fuse without danger. 73. Fig. 21 shows a single-pole block made by the Stan-ley Company. In this case, the lid of the iron box is placedat the bottom and the fuse holder A is pulled out, thusbreaking connection with the terminals /, /. The fuse g. Fig. 21. runs through a block of wood h, thus confining the arcand preventing it from arcing and burning the terminals t, 21 {b) shows the box closed and in the position in whichit is placed on the pole. In the General Electric single-poleprimary cut-out, the wires enter at the bottom, as shown in J. III.—5 60 ELECTRIC TRANSMISSION. 14 Fig. 19. Where large transformers are operated in substa-tions, automatic switches or circuit-breakers are used insteadof fuses to disconnect the transformer from the line in caseof a short circuit or overload. TRANSFORMERS ON SINGLE-PHASE CIRCUITS. 74. Transformers in Parallel.—Transformers may beconnected in parallel so as to feed a single circuit, as shown ? in Fig. 22, but care 2000 Vo/fs1
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