What are the steps involved in installation of power transformer at site?

Operation of power transformers

  1. Standard and special transformer tests.
  2. Site considerations.
  3. Preliminary inspection upon receipt of transformer.
  4. Plan for the prevention of contaminants.
  5. Making connections that work.
  6. Controlling sound level.
  7. Make sure the transformer is grounded.
  8. Final inspection and testing.

How does a 11kV transformer work?

An 11kV transformer is a power transformer that regulates and distributes electrical power at a safe voltage level in residential areas. These power transformers feed local transformers responsible for distributing power to different buildings in a specific area.

Why 11kV is used in distribution system?

The 11kV lines are used in residential areas and is what feeds the local transformers, which then distributes power to the buildings in the area. 33kV lines on the other hand involve much higher voltages and are used to distribute power from one small sub-station to another.

Is code for transformer installation?

0.2 The code of practice on installation and maintenance of transformers was originally published in 1961 as IS : 1886, intended as a guide to installa- tion engineers, contractors and others engaged in the installation and main- tenance of power and distribution transformers.

Why do transformers not work with direct current?

As mentioned before, transformers do not allow DC input to flow through. This is known as DC isolation. This is because a change in current cannot be generated by DC; meaning that there is no changing magnetic field to induce a voltage across the secondary component.

Which wire is used in transformer?

copper wire
This is the most important for the high current winding (the secondary coil of a step-down transformer). Thick copper wire is used for this winding, because thick wire of low resistivity has a low resistance.

How is the 11 kV line connected to the transformer?

The 11 kV line is connected to the transformer (11kV / 400 V) through gang isolator and fuses. 4. The lightning arresters are installed on the H.T. side to protect the sub-station from lightning strokes.

How to plan the installation of a transformer?

When planning the installation, the location is selected, that complies with all safety codes yet does not interfere with the normal movement of personnel, equipment, and material. The location should not expose the transformer to possible damage from cranes, trucks, or moving equipment. 3. Preliminary inspection upon receipt of transformer

Are there general guidelines for installing and testing dry type transformers?

This material will provide additional general guidelines for installing and testing both dry-type and liquid-filled transformers for placement into service. A note of caution: The information presented here is not meant to supersede any manufacturer’s instructions.

What size base do I need for a 75kva transformer?

For pad mount transformers with ratings 75kVA through 500kVA, a typical concrete base would be 5 1/2 by 6 1/2 ft and 10 in. thick with chamfered edges on top of the base and footings extending 20 in. down from each of the ends of the long sides.