Inspection and Test Plan for Power Transformer 

The inspection and test plan for power transformer article provides you information about power transformer test and power transformer inspection in manufacturing shop. The draft Inspection and test plan provided as well. Download from above link. 

power transformer inspection and test plan

You may need to review this sheet in conjunction of Third Party Inspection for Power Transformer article.

The IEC, NEC, NEMA, FDF, ISO ANSI, CI, IPCEA standard requirements normally are applied for inspection and test plan in manufacturing shop.

The witness of some inspection and test by third party inspector is mandatory and cannot be waived.

Some others must only monitored and fully witnessing are not necessary, for these thing, the inspection man-days etc. depends to the purchaser decision, some prefer stringent monitoring and even assign resident inspector in manufacturing shop and some others relay to quality control system of the manufacture and assign only few days for monitoring points.

These are some of inspection points which need to be witnessed, checked, monitored and reviewed by third party inspector in Power Transformer manufacture shop.

Inspection and Test Plan for Power Transformer - Important Points

  • Witness of out of tank inspection, consisting of check of wiring for adequacy of insulation, cleaning and termination, if tap changer switch fitted, check for all electrical connections and switch mechanism and check for identification of winding ends (primary, secondary and phase)
  • Final inspection after tanking, consisting of witness full tests, including heat run or standard abbreviated tests as may be specified, check tank seams for signs of oil leakage, check of handling for cable boxes, size and quantity of cable glands and position of entries, functionally test alarm relays, if fitted, for position of contacts, check of all ancillary equipment fitted as requisitioned, dimensional check to GA Drawing and check for rating plate and general paint etc.


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