What is substation layout?

The substation is the part of an electrical supply system which transmits the high voltage from the generating substations to the local distribution networks. Between the generation and distribution, the voltage may vary through several substations.

What is the need of 33 11kV substation?

33kV to 11kV transformers steps down the the voltage to a safe level, which is then distributed via 11kV feeders to homes and businesses. Many people question why the voltage is as high as 33kV in the first place. The reason is that the higher the transmission voltage, the lower the transmission losses will be.

Where do you place a substation?

In a multi-storied building, the substation shall preferably be installed on the lowest floor level, but direct access from the street for installation or removal of the equipment shall be provided. The floor level of the substation or switch room shall be above the highest flood level of the locality.

How to plan the layout of a substation?

Layout The first step in planning a substation layout is the preparation of a one-line diagram which shows in simplified form the switching and protection arrangement required, as well as the incoming supply lines and outgoing feeders or transmission lines.

How big is a transmission and distribution substation?

The large transmission substations can cover a large area (several acres/hectares) with multiple voltage levels, many circuit breakers and a large amount of protection and control equipment. A distribution substation transfers power from the transmission system to the distribution system of an area.

How are 11 kV and 1500 kVA substations designed?

Some designs achieve minimum EMF emission by installing the low voltage cables and switchboard in a trench down the middle of the room. This adds substantially to the space requirements. It is possible to reduce this space but only by sacrificing EMF containment! The substations are designed for rated voltage 11 kV and 1500 kVA transformers.

What’s the difference between a HT and Lt power distribution system?

An HT power distribution system simply means a high voltage distribution system while an LT is a low voltage or tension power distribution system. LT power supply can be around 230 Volts for a single-phase connection and 400 Volts for a three-phase connection.