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ANAF or ONAN transformers | Eng-Tips Two questions:- 1 I have only ever come across ANAF transformers fitted indoors Are they ever used outdoors, particularly if it is a high ambient temperature environment? 2 What is the approximate ratio in size difference between a ANAF and ONAN 8MVA transformer?
Transformer AN vs AF | Eng-Tips Hi Buddy, need your guidance on this:- For each transformer, there is 2 rating involved , AN and AF Lets say AN AF = 2 0 2 5MVA Shall there be any difference with the transformer with 2 0 3 0MVA? What is the application difference ? Is there any rule of thumb indicating the AF rating should
OA\FA ONAN\ONAF diferent? | Eng-Tips Please tel me what is the difference between OA\\FA and ONAN\\ONAF? What mean when it is said that power ratings are given at OA ta 55oC and FA at 56oC temperature rise? Where I can read something more about it except ANSI?
TRANSFORMER ROOM FORCED AIR VENTILATION DESIGN CALCULATION In case you're still working on this -- We use a "rule of thumb" of 5cfm per kVA of transformer, which is conservative, but helps account for issues that hinder the performance of the blower This would give you a value of 5000 cfm forced air ventilation You should place the intake and exhaust on opposite sides of the room, with intake low and exhaust high