What is ONAN/ONAF1/ONAF2 for transformer cooling

Answer Posted / p.aruna devi

ONAN -Oil natural air natural
ONAF-Oil natural air force

Is This Answer Correct ?    228 Yes 13 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

If one lamp connects between two phases it will glow or not?

620


why capacitance effect is predominant in underground cable transmission and inductance effect is predominant in over head line transmission?

3199


What is quadrantal symmetry?

1115


I AM FROM ELECTRICAL ENGINEERING ? I AM ASPIRING FOR "BHEL".HOW I HAVE TO PREPARE .ON WHICH TOPICS TO BE CONCENTRATE MORE.PLEASE GIVE FULL DETAILS OF WRITTEN EXAM.

1666


what is the difference b/w ground & virtual ground?

1852






Can you any one explain application of buccholz relay operation and pressure relif device operation of power transformer

1447


Which is the largest hydropower station in the world?

624


various transmission tower like .,D tower ,K.C.O tower ,C.C.O tower,K.C.R tower ,C.C.R tower ,H.C.O tower in different tons.

2679


What is the formula to find out two phase active & reactive power

1705


How earthing of switchgear system to be done.

1460


explain the Trip supervision circuit

1667


Define peak time.

693


Which type of DG need Netral Earthing?

4513


how i calculate the syncrones generator NGR resistance .if we have a 6mw generator line voltage of generator 11kv also line current 393.3 ampere.

1667


i have 90kw motor.so i choose connect cable .please what is parameter checked so please give to formula

1733