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High tension cables are generally used upto
11 kV
33 kV
66 kV
132 kV
11 kV
High Tension (HT) cables are categorized based on their insulation and operational voltage levels as defined in power system standards. Specifically, cables rated up to 11 kV are classified as High Tension (HT) cables.
High Tension (HT) cables are categorized based on their insulation and operational voltage levels as defined in power system standards. Specifically, cables rated up to 11 kV are classified as High Tension (HT) cables.
EmaxтАЛ=rln(rRтАЛ)VтАЛ тАФ Electric field stress at the conductor surface, which dictates insulation requirements for high voltage cables.
Cable classification depends on the dielectric stress and insulation thickness required to prevent puncture or flashover. For HT cables (up to 11 kV), standard impregnated paper or XLPE insulation is sufficient to manage the electrical stress, whereas higher voltages require Super Tension (ST) or Extra High Tension (EHT) cable designs to handle the increased electric field strength (E=rln(R/r)VтАЛ).
HT (High Tension) cables: Up to 11 kV.
ST (Super Tension) cables: 22 kV to 33 kV.
EHT (Extra High Tension) cables: 66 kV to 132 kV.
Extra Super Voltage (ESV) cables: Beyond 132 kV.
The classification is based on the necessity for specialized insulation (like pressure cables) at higher voltage levels.
Cost-effective for lower voltage distribution ranges.
Ease of installation compared to complex EHT cable systems.
Not suitable for bulk power transmission at very high voltages due to insulation breakdown risks.
Higher capacitance effects at higher voltages require advanced dielectric materials.
Primary distribution networks in urban areas.
Industrial feeders and factory power supplies.
These voltage levels are standard in the Indian electrical power grid infrastructure.
Option B (33 kV) is generally classified under Super Tension (ST) cables, which require better insulation properties than HT cables.
A is correct тАФ High tension (HT) cables are technically defined to cover voltage ranges up to 11 kV.
Always remember that HT is 11 kV, ST is 33 kV, and EHT starts from 66 kV. This is a common static GK-Technical overlap question in competitive exams like SSC JE and GATE.