Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Large industrial consumers are supplied power at
400 kV
11 kV
66 kV
132 kV
11 kV
Large industrial consumers, such as medium-to-heavy manufacturing plants, are typically supplied power at 11 kV. This voltage level provides an optimal balance between the economy of transmission and the insulation requirements for internal plant distribution systems.
Large industrial consumers, such as medium-to-heavy manufacturing plants, are typically supplied power at 11 kV. This voltage level provides an optimal balance between the economy of transmission and the insulation requirements for internal plant distribution systems.
P=3тАЛVLтАЛILтАЛcos╧Х тАФ Formula for three-phase power delivered to the industrial consumer
PlossтАЛ=I2R тАФ Principle used to justify high-voltage transmission up to the point of delivery
The electrical distribution system in India follows a hierarchical structure where transmission occurs at high voltages (e.g., 220 kV, 400 kV) to minimize I2R losses. Distribution substations step down this voltage to 11 kV for primary distribution. Large industries are connected directly to these 11 kV feeders, allowing them to utilize their own step-down transformers to convert power to 415 V (three-phase) or 230 V (single-phase) for industrial equipment.
11 kV is the standard primary distribution voltage in India for industrial and commercial hubs.
Higher voltages like 66 kV or 132 kV are generally reserved for heavy industrial clusters (e.g., steel plants or large refineries) rather than typical large industrial consumers.
Connecting directly to 11 kV avoids the voltage drop associated with lower voltage (415V) distribution lines.
The industrial consumer must install a private transformer to step down 11 kV to the utilization voltage.
Lower current for the same power, reducing conductor size.
Better voltage regulation at the load end.
Reduced transmission losses within the local network.
Requires high-voltage switchgear and protective equipment.
Necessitates specialized training for operation and maintenance of 11 kV equipment.
Higher capital cost for transformers and high-tension metering.
Large manufacturing units
Commercial complexes
Data centers
Large residential townships
In India, voltages like 33 kV and 11 kV are classified as High Tension (HT) supply.
Option A (400 kV) is used for EHV bulk power transmission, not industrial service connections.
Option C and D (66 kV and 132 kV) are sub-transmission levels, used for bulk supply to heavy industries or distribution substations.
B is correct тАФ Large industrial consumers typically receive supply at 11 kV as it serves as the standard primary distribution voltage level.
Always remember: Distribution systems operate at lower voltages compared to Transmission lines; 11 kV is the most common 'Primary Distribution' voltage in India.