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how many types of colling system it transformers?
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Answer Posted / rajib chakraborty
1. ONAN (oil natural,air natural)
2. ONAF (oil natural,air forced)
3. OFAF (oil forced,air forced)
4. ODWF (oil direct,water forced)
5. OFAN (oil forced,air forced)
6. AN (air natural)
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