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Distributor is designed from the point of view of
Current carrying capacity
Voltage drop
Operating voltage
Operating frequency
Operating voltage
A distributor is a component in a power distribution system designed primarily to feed power to consumers. Unlike a feeder, which is designed based on its current-carrying capacity, a distributor is designed based on the permissible voltage drop at the consumer's terminals to ensure voltage regulation remains within specified limits.
A distributor is a component in a power distribution system designed primarily to feed power to consumers. Unlike a feeder, which is designed based on its current-carrying capacity, a distributor is designed based on the permissible voltage drop at the consumer's terminals to ensure voltage regulation remains within specified limits.
╬ФV=IRтАЛR+IXтАЛX тАФ Represents the voltage drop in a distribution line where IRтАЛ and IXтАЛ are resistive and reactive components of current.
VendтАЛ=VsourceтАЛтИТтИС╬ФV тАФ Represents the end-terminal voltage calculation used for distributor sizing.
The design of a distributor focuses on maintaining the supply voltage within standardized limits (e.g., ┬▒5% or ┬▒6%) at the end of the line. Since the load is tapped off at various points along the distributor, the voltage drops cumulatively along its length. Therefore, the cross-sectional area of the conductor is selected such that the maximum voltage drop does not exceed the statutory limits, regardless of the current capacity.
Feeders are designed based on current-carrying capacity.
Distributors are designed based on voltage drop requirements.
The voltage drop must be kept within acceptable limits defined by regulatory authorities (typically ┬▒5%).
Load variations along the distributor length make voltage drop the primary constraint.
Ensures stable voltage to end-users
Reduces flicker and equipment damage due to voltage fluctuations
Increased conductor material cost compared to feeder-based design
Complex calculation for multi-tapped loads
Secondary distribution networks
Residential and commercial power supply lines
| Feature | Feeder | Distributor |
|---|---|---|
Primary Design Basis | Current-Carrying Capacity | Permissible Voltage Drop |
Feeder design is mainly thermal (current capacity), while distributor design is mainly regulatory (voltage drop).
Option A is incorrect because current capacity is the criterion for feeders, not distributors.
Option C is the most accurate as the operational voltage limits dictate the voltage drop tolerances.
C is correct тАФ The design of a distributor is primarily governed by the requirement to maintain the operating voltage within permissible limits at the consumer terminals.
Always distinguish between feeders (current limit/thermal constraint) and distributors (voltage regulation/drop constraint) when answering power system design questions.