. The Bell System technical journal . th the testing of the line by means of direct obviate this, the scheme shown in Fig. 18-5 has been devised, whichis termed protector drainage. In this case, the drainage coil isconnected to the line wires through protectors having a low breakdown-voltage. This combination is backed by high-voltage protectors toinsure unimpeded discharge in case of large disturbances. With thisarrangement the drainage coil does not come into operation unlessthere is a severe disturbance, and furthermore owing to the mutualinductance between the two halves of its
. The Bell System technical journal . th the testing of the line by means of direct obviate this, the scheme shown in Fig. 18-5 has been devised, whichis termed protector drainage. In this case, the drainage coil isconnected to the line wires through protectors having a low breakdown-voltage. This combination is backed by high-voltage protectors toinsure unimpeded discharge in case of large disturbances. With thisarrangement the drainage coil does not come into operation unlessthere is a severe disturbance, and furthermore owing to the mutualinductance between the two halves of its windings it tends to cause ADVANCES IN CARRIER TELEGRAPH TRANSMISSION 193 such discharge to occur at the same moment and be of equal magnitudefrom both wires of the pair to ground whenever it does operate. Extensive tests and practical experience have shown that the abovearrangements are quite effective, affording a reduction of about 95 TOLL ENTRANCE CABLE CABLE POLE OPEN-WIRE LINE CABLE POLE I CENTRAL-r- OFFICEGROUND CENTRAL OFFICE. PROTECTORBLOCKS
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
