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Question

Which of the following is INCORRECT regarding the classification of substations on the basis of operating voltage? 

A.

High voltage substation 

B.

Ultra-low voltage substation 

C.

Ultra-high voltage substation 

D.

Extra-high voltage substation

Answer ( Option B)

Ultra-low voltage substation 

Solution

Based on the operating voltage ultra-lowvoltage sub station is not classified.

Electrical sub-station classified on the basis of the following components :

1. Depending on the nature of Duty/ service.

2. On the basis of control.

3. On the basis of electrical nature.

4. On the basis of importance/necessity.

5. On the basis of mounting and design.

Classification of sub-stations on the basis of operating voltage.

1. Low voltage sub-station voltage less than 11 kV.

2. High voltage sub-station 11 kV to 66 kV

3. Extra high voltage sub-center from 132 kV to 400 kV.

4. Ultra high voltage sub-station grater than 400 kV.

Hence, the correct option is (B).

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