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how many types of colling system it transformers?
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Answer Posted / abdulla kunhi
1. ONAN (oil natural,air natural)
2. ONAF (oil natural,air forced)
3. OFAF (oil forced,air forced)
4. OFWF (oil forced,water forced)
5. ODAF (oil directed,air forced)
6. ODWF (oil directed water forced)
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