The electric cabinets are located in an open space with some machinery
around, where the ambient air is not necessarily clean.
Submit the enclosure specification regarding dust-proof rating for review.
could damage not only all the transformers but also the nearby facilities
such as compressors, incinerator and engineering maintenance work
area. Loss of transformers could result in business interruption as the
emergency generator can only back up for limited facilities. The insulation
oil currently used is a normal mineral oil grade meeting ASTM D3487 type
1.
Install 2-hour fire rated walls around the transformer yard. Alternatively,
replace the oil with the less flammable transformer oil such as ASTM
D4652 or ASTM D5222 compliant. Before implementation, consult with
the transformer manufacturer if such oil is compatible with the existing
transformers.