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Which are the Elements used in Electrical Power Transmission Line

i)          CONDUCTORS:       Usually 3 for single circuit line but 6 for double circuit line. Usual material is Steel reinforced Aluminum having high Electrical Conductivity and High Tensile Strength.

ii)         STEP UP & STEP DOWN TRANSFORMERS:

iii)        LINE INSULATORS:           To isolate conductors electrically from the ground. These should have High mechanical strength, High Electrical resistance to have min leakage current to ground, High relative permittivity in order that die electric strength is high, Non porous and with high ratio of puncture strength to flashover.

They are PIN TYPE, SUSPENSION TYPE, STRAIN INSULATOR, SHACKLE INSULATOR

iv)        SUPPORTS:   These are generally steel galvanized towers  to support conductors.

v)         PROTECTIVE DEVICES:    Such as ground wire, lightning arrestors, circuit breakers, relays etc.

vi)        VOLTAGE REGULATING DEVICES: To maintain the voltage at receiving end.

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