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14 Cards in this Set
- Front
- Back
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3 components of a transmission line |
Conductor Insulator Support structure |
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Conductor |
Carries current Al / Cu Bare Triplex |
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ACSR |
Al conductor steel reinforced Steel core & Al strands |
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Underground conductor |
Conductor Insulator Shield Outer jacket
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Triplex |
Pole to house 2 insul & 1 bare |
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Overhead vs underground |
OH: inductive UG: capacitive |
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Insulators (main) |
High surface R between conductor & ground |
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2 types of insulator |
Suspension > 70kv Ribbed surface Above conductor Pin <70kv Conductor supported above insul Most porcelain, new are polymer (less weight, sturdier) |
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Support structure types |
Steel towers > 70kv Poles <70kv |
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Support structure purpose |
Safe height in all weather ( sags in summer) Galloping lines (wind) Oscillating Need tension |
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Dampeners |
Lead weights to prevent oscillating |
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Creeping distance |
Distance along surface |
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Strike distance |
Distance straight thru air/oil |
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Suspension segments |
115 - 3' 230 - 6' 500 - 12' |
