Difference Between High and Low Voltage Distribution System

Difference Between High and Low Voltage Distribution System

Difference Between High and Low Voltage Distribution System . The system by which power is distributed from sub-station/control station to consumers is known as distribution system. Distribution can be done either at high voltage or low voltage :

Difference Between High and Low Voltage Distribution System

Classification of Distribution Box

Disribution system is also divided into :

1.Primary Distribution :  Primary distribution system is a system in which electric power is delivered from sub-station to Bulk consumers at 33 KV /11 KV either by overhead or underground system.

2.Secondary Distribution : secondary distributin system is  a system by which electric power is delivered from small sub-station to domestic consumers at 400 v / 230 volts.

Comparison between primary/high voltage distribution system and secondary/low voltage distribution system.

High Voltage Distribution System	Low Voltage Distribution System
1. These are used for primary distribution  of power	1. These are used for secondary distribution of power
2. They carry voltage of the order of 33  kv or 11 kv	2. They carry voltage of the order of400/230 volts
3. For high voltage distribution 3-phase 3-wire system are used	3. For low voltages distributin 3 phase 4 wire system are used .
4.Fir large cities with heavy industrial consumers , the load requirement is large so , HV distribution system is preferred	4.For small towns with small industries and domestic consumers , the load requirement

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