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Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
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In transmission system a feeder feeds power to
Feeder
Distributor
Service Mains
None of the above
Distributor
In an electrical power distribution system, a feeder is a conductor that connects the substation to the distributor. Feeders are designed primarily based on their current-carrying capacity, as they do not have any tapping points along their length.
In an electrical power distribution system, a feeder is a conductor that connects the substation to the distributor. Feeders are designed primarily based on their current-carrying capacity, as they do not have any tapping points along their length.
VdropтАЛ=I├ЧRfeederтАЛ тАФ Voltage drop in a feeder, kept minimal by design
IfeederтАЛ=тИСIdistributorтАЛ тАФ Total current supplied by feeder to the distribution system
The transmission and distribution network follows a hierarchical structure: Substation тЖТ Feeder тЖТ Distributor тЖТ Service Mains. The feeder acts as a high-capacity link to carry bulk power from the transformer output to the start of the distribution system, ensuring minimal voltage drop across its length since no loads are tapped directly from it.
Feeders have no tapping points along their route.
The current in a feeder remains constant throughout its length.
The primary design constraint for a feeder is its current-carrying capacity (thermal limit).
Distributors have multiple tapping points for consumer connections, causing current to vary along their length.
High efficiency due to optimized conductor sizing.
Minimal voltage fluctuations as no load is tapped.
Failure of a feeder results in power loss to the entire downstream distribution network.
Expensive to maintain long-distance high-voltage lines.
Power transmission from substations to local neighborhoods.
Interconnection between main distribution stations.
Service mains are the small cables that connect the distributor to the individual consumer's premises.
Option A is incorrect because feeders do not feed other feeders in standard radial distribution.
Option C is incorrect because service mains are the final link from the distributor to the load.
B is correct тАФ A feeder is a conductor that carries power from the substation to the distributor, which then distributes power to consumers.
Always remember the sequence: Substation (Source) тЖТ Feeder (No Tapping) тЖТ Distributor (Multiple Tapping) тЖТ Service Mains (Consumer).