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
In the design of a feeder which of the following is the major consideration?
Voltage drop
Current carrying capacity
Frequency
KVA system
Current carrying capacity
In power system engineering, a feeder is a conductor that connects the substation to the distribution area without having any tapping points along its length. The primary design constraint for a feeder is its current-carrying capacity, which ensures that it can safely deliver the required power without exceeding its thermal limit or causing insulation failure.
In power system engineering, a feeder is a conductor that connects the substation to the distribution area without having any tapping points along its length. The primary design constraint for a feeder is its current-carrying capacity, which ensures that it can safely deliver the required power without exceeding its thermal limit or causing insulation failure.
P=3тАЛVLтАЛILтАЛcos╧Х тАФ Real power transmitted through the feeder
TriseтАЛтИЭI2R тАФ Temperature rise based on current magnitude
The feeder design must account for the continuous flow of current to the load centers. If the actual current exceeds the ampacity (current-carrying capacity), excessive I2R losses occur, leading to overheating of the insulation and permanent damage to the conductor. While voltage drop is a secondary concern for performance (regulation), current capacity is the fundamental safety and operational limit that dictates conductor size selection.
Feeders have no tapping points along their length.
Distributors are the conductors that have tapping points for supply to consumers.
The cross-sectional area of a feeder is primarily determined by the current it must carry.
Voltage drop is the major design consideration for a distributor, not a feeder.
High reliability due to lack of intermediate tappings.
Maintains voltage profile by minimizing drop across the span.
Higher initial cost due to dedicated conductor runs.
Rigid structure compared to ring main systems.
Substation to distribution transformer primary side.
Industrial plant power distribution networks.
Current carrying capacity depends on the material (Copper/Aluminum), insulation type, and ambient temperature.
Option A (Voltage drop) is the primary design factor for distributors, not feeders.
B is correct тАФ Current carrying capacity is the critical design parameter for a feeder to prevent thermal damage and ensure operational safety.
In competitive exams, always remember: Feeders are designed based on current-carrying capacity, whereas Distributors are designed based on voltage drop requirements.