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The most suitable practical value of Secondary distribution is?
66 kV
11 kV
230 V/ 415 V
22 kV
230 V/ 415 V
Secondary distribution is the final stage of an electrical power system where power is delivered to the end consumers. In India, the standard voltage for single-phase secondary distribution is 230 V (phase to neutral) and for three-phase systems, it is 415 V (phase to phase).
Secondary distribution is the final stage of an electrical power system where power is delivered to the end consumers. In India, the standard voltage for single-phase secondary distribution is 230 V (phase to neutral) and for three-phase systems, it is 415 V (phase to phase).
VLтАЛ=3тАЛVphтАЛ тАФ Relationship between line and phase voltage in star-connected secondary distribution systems.
Power from the primary distribution lines (usually 11 kV) is stepped down by a distribution transformer located near the load center. The secondary winding of this transformer provides a lower voltage (415 V/230 V), which is then distributed to houses and small commercial establishments through the Low Tension (LT) lines.
Primary distribution is typically carried out at 11 kV, 22 kV, or 33 kV.
Secondary distribution is designed for consumer safety and appliance compatibility.
A 415 V line-to-line supply provides a 230 V phase-to-neutral supply (415 / 3тАЛтЙИ230V).
Safety for household appliances
Cost-effective transmission to local consumers
High current for same power leading to higher copper losses in secondary lines
Voltage drop issues over long distances
Domestic lighting and fans
Small-scale industrial equipment
Commercial offices
66 kV and 22 kV are generally considered transmission or sub-transmission voltages, not secondary distribution levels.
11 kV is the standard voltage for Primary Distribution.
C is correct тАФ The standard secondary distribution voltage used in India for end-user supply is 415 V (three-phase) and 230 V (single-phase).
Always remember that 11 kV is associated with the primary distribution stage, whereas 415 V/230 V is strictly the secondary (final) distribution stage.