Transformer

That's a broad question. The physical installation would include questions, such as:

1) Is it sized for the load?

2) Will it be classified as a Separately derived system?

3) Have I provided the proper overcurrent protection?

4) Is it mounted / installed in a workman like manner?

5) Is all line & load wiring sized correctly?

6) Will the wiring be long runs requiring voltage drop calculations?

7) Will it be a step up or step down transformer?

8) Do harmonics need to be addressed?

You ask a big question. What exactly do you wish to know?

Good luck,

James

hastingselectric

As told by guest its true that its a broad question,

consider some points before instatallation. The total connected load, the type of transformer, Over current protection a) Primary protection and b) Secondary protection.Provide proper grounding for the transformer,Appropriate provisions shall be made to minimize the possibility of damages from external causes where the transformers are exposed to physical damages.Provide proper ventilation for the transformer, Proper access to the transformer for maintenance, Proper fire protection, The walls and roofs of the vaults shall be fire resistant at least for 3 hours, shall be installed as far as possible from the main entrance door,

can u tell me what are the primary and secondary protection of transformer?

For example if you are using a transformer of 600v or less then the overcurrent protection from the Main panel to the tranformer is known as secondary protection which may consist of 1 to 6 breakers or fuses and which is set at 125 percent full load input current and the overcurrent protection from the transformer is called as primary protection which shall be set at 250 percent of full load input current and primary overcurrent protection can be circuit breaker or a fuse.

http://cr4.globalspec.com/edit/newthread?pt=1

Hi,

A transformer itself has its protection device like , turret CTs in the HV & LV side for Oil Temperature Alarm/Trip, Winding Temperature Alarm/Trip, Main Buccholz, OLTC Buccholz, Pressure Relief Device. All these devices are integrated to the Transformer Control & relay Panel.

In addition to the above Transformer Over Cuurent, Earth fault, and differential protection will be which will be sensed through the CTs provided in the Transformer HV side and LV Side.

Hopefully things have beeter clarity right now?

N.Suresh