Question:

grounding transformers?

how to ground transformers at substations??

Answer:

copper rod pounded into the ground with a wire going to the terminal that is ground on the transformer.
an earth ground is made at the transformers sub-station. This is made by driving a copper rod (uffer?)deep into the earth,the depth set by the size of said transformer.A portion of the (uffer?)or ground rod is left exposed and a ground wire/strap is attached to it
The steel body of the transformer and the neutral (wye point) should be bonded to a suitably installed and tested rod or mat by a cable capable of carrying the fault current that could occur. The wye point, in some cases, may be connected through a fault limiting resistor but this involves extra protection equipment and proper coordination. The actual type of ground depends on local conditions. A simple rod may be used in conditions where the ground has low resistance, a mat or multiple rods may be used in others. The resistance of the ground should be tested to meet local codes (usually 5 or 10 Ω). Since the design involves engineering and knowledge of national and local codes, it is best to have this done by a reputable engineering company.

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