Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1379
, high voltages, which endangerthe insulation of the whole system, and which it is impossi-ble to detect on ordinary switchboard instruments mayexist. Abnormal voltages are therefore often found in cir- 1344 Steam Engineering cuits containing a combination of underground;, and over-head circuits… … Fig. 636double-pole and triple-pole 300-volt arresters station on each outgoing line. When cables are used, thearrester should be placed on the pole where the cable joinsthe overhead wires. Fig. 637 shows the appearance of ahorn lightning arrester. Disconnecting Switches.—Lightning arresters with…
