Question
Describe the equipment required for the construction of 11/0.4 kV distribution substation.
Answer :
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Skip in 10
The main equipment at an 11/0.4 kV distribution substation comprises:
• distribution transformers;
• transformer mounting structure;
• protection system; • earthing system;
• lightning arrestors;
• LT distribution box; and
• reactive compensation.
Transformer Mounting Structure
Transformers can be mounted outdoors in one of the following ways: Plinth mounting, H-pole mounting and direct mounting.
- Plinth mounting: The transformer is mounted on a plinth made of concrete. The plinth has to be higher than the surroundings. The method can be used for all sizes of transformers. Where the distribution substations are plinth mounted, they are efficiently protected by fencing so as to prevent access to the apparatus by unauthorized persons.
- H-pole mounting: The transformer can be mounted on crossarms, fixed between two poles,
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