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The surge impedance of 100 km long underground cable is 50 Ω. The surge impedance for 50 km length of similar cable would be:
- a)50 Ω
- b)100 Ω
- c)25 Ω
- d)80 Ω
Correct answer is option 'A'. Can you explain this answer?
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The surge impedance of 100 km long underground cable is 50Ω. The...
Surge impedance:
The surge impedance or characteristic impedance of a long transmission line is given by,
Where,
Z is series impedance per unit length per phase
Y is shunt admittance per unit length per phase
In case of a lossless line (i.e. R = 0, G = 0), the surge impedance is given by
- Surge impedance does not depend upon the length of the transmission line.
- Surge impedance depends on the characteristics of the transmission line like diameter & spacing between the conductors.
- So that surge impedance of 100 km and 50km long underground cable is 50 Ω.
Important Points
Surge impedance loading (SIL):
Surge impedance loading is defined as the power load in which the total reactive power of the lines becomes zero. The reactive power generated by the shunt capacitance is consumed by the series inductance of the line.
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The surge impedance of 100 km long underground cable is 50Ω. The...
The surge impedance of a cable is determined by its characteristic impedance and its physical dimensions. The surge impedance is usually given in ohms and represents the ratio of voltage to current during a surge or transient event in the cable.
In this case, the surge impedance of the 100 km long underground cable is given as 50. This means that during a surge or transient event, the ratio of voltage to current in the cable is 50 ohms.
It is important to note that the surge impedance of a cable is a characteristic property that depends on the design and construction of the cable. It is typically specified by the manufacturer and used in calculations and analysis of the cable's performance during transient events.
In this case, the surge impedance of the 100 km long underground cable is given as 50. This means that during a surge or transient event, the ratio of voltage to current in the cable is 50 ohms.
It is important to note that the surge impedance of a cable is a characteristic property that depends on the design and construction of the cable. It is typically specified by the manufacturer and used in calculations and analysis of the cable's performance during transient events.
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The surge impedance of 100 km long underground cable is 50Ω. The surge impedance for 50 km length of similar cable would be:a)50Ωb)100Ωc)25 Ωd)80ΩCorrect answer is option 'A'. Can you explain this answer?
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