Each transformer undergoes all the routine tests before dispatch and is delivered safe at site duly packed. However, following precautions must be observed for its intended performance :
- Transformer is to be unpacked fully and made to stand vertical before carrying out site tests. Store the transformer vertically
- Before energizing, all the secondary terminals not being used are short circuited and grounded; Tan delta terminal in 66 KV is also to be grounded. Primary connection is to be tightened sufficiently to avoid hot connection
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