Question : pressure cable are of two types. (i) oil filled cables. (ii) gas pressure cables What is the difference between two? Which one is good? Kindly explain the difference in detail

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Q: 1. Circuit breakers should be included in the impedance diagram. (True/False)

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Q: () List any three factors to be considered for mechanical design of overhead lines

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Q: differentiate between overhead service connection and under ground service connection with sketch

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Q: (i) List any three factors to be considered for mechanical design of overhead lines

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Q: Write the Oman Electrical Standard for installing 1-Gang 2-Way Switch

A: The circuit diagram for installing 1-Gand 2-ways switch is shown below:

Distribution System

The final stage in the delivery of the electric power is the electric power distribution system. From the transmission system to the individual customers it carries electricity. The distribution system is connected with the transmission system and is used to lower the voltage of the transmission to medium voltage in the range of 2 kV to 35 kV with the help of transformers. This medium voltage to the distribution transformers located near the customer's premises is carried by the primary distribution system lines. These distribution transformers in turn lower the voltage to utilization voltage used in lightings, household appliances, industrial equipments etc. Through secondary distribution lines often several customers are supplied from one transformer. It is through service drops, the commercial and residential customers are connected to the secondary distribution system lines. Customers who demand a larger amount of power can be connected directly to the primary distribution system level or the sub-transmission level.