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Distributors fed at both ends has an advantage of
Continuous supply
Fault isolation
Being economical
All of the above
All of the above
A distributor fed at both ends (ring main or double-fed radial) significantly improves reliability and efficiency compared to a simple radial distributor. It provides redundancy, better voltage regulation, and reduces power loss by allowing current to flow from two directions towards the loads.
A distributor fed at both ends (ring main or double-fed radial) significantly improves reliability and efficiency compared to a simple radial distributor. It provides redundancy, better voltage regulation, and reduces power loss by allowing current to flow from two directions towards the loads.
VdropтАЛ=тИСIтЛЕR тАФ Fundamental principle of voltage drop calculation along the conductor length
In a distributor fed from both ends, the voltage drop is cumulative from both ends towards the point of minimum potential. This arrangement reduces the maximum voltage drop in the line and increases the current-carrying capacity for a given cross-sectional area, making it more economical. Furthermore, in the event of a fault in a specific section, that section can be isolated while the rest of the network remains energized via the alternate feed.
Reduces the maximum voltage drop by approximately 25% compared to a single-fed system.
Enhances system reliability; if one supply fails, the other provides partial or full capacity.
Smaller conductor cross-section can be used for the same voltage regulation requirement, improving economy.
Allows for easier maintenance and fault repair without complete blackout.
Improved voltage regulation
High reliability of supply
Increased current carrying capacity
Economical utilization of conductor material
More complex protection schemes required
Increased installation and coordination costs
Synchronization issues if sources are AC
Urban power distribution networks
Industrial plant power distribution
High-reliability commercial grids
In a single-fed radial distributor, the current is unidirectional, leading to higher voltage drops and less flexibility.
A distributor fed at both ends is a special case of a ring main distributor where the loop is effectively closed, allowing bi-directional flow based on load distribution.
D is correct тАФ Distributors fed at both ends provide superior reliability, better voltage profile, and cost-effective material usage.
Always remember that 'Double-fed' systems reduce I2R losses and minimize voltage sag at the mid-point of the distributor.