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Electrical Energy its Generation Transmission and by Ernst Julius Berg

By Ernst Julius Berg

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Not in P ar- not cause as follows: TRANSMISSION LINE 43 No matter how or where the circuit is made, as long as there an arc, there is a circuit. Usually this contains resistance, inductive reactance, and condensive reactance. is With a ground the impressed frequency is that of of resonance with the generator is of course frequency very slight, since it would involve a definite relation between the condensive and inductive reactance, but if the ground was made by an arc, independent in this case there is all probaoscillating circuits can form positive The probability the generator.

This would give no safety factor whatever. the smallest wire that can be insulated is about At 500,000 1 in. in volts diameter. 5 in. 20 in. diameter; and 60,000 volts, a very small wire. But limiting the stress to 140,000 volts per inch we find that: For 500,000 volts the wire should be more than 2 300,000 volts the wire should be about 2 in. in. in diam. 150,000 volts the wire should be just a little less than 1 in. 20 in. or about No. 000 B. &S. 10 in. or about No. 10 B. It is &S. evident from this that maximum voltage it is very essential to keep the down when around from 60,000 to 100,000 ing the neutral voltage between we considering voltages lines.

135. 5 per cent greater line. 73; thus, = i. 73. 73. 665. 77 X +

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