WHAT IS THE FULL FORM OF ONAN ( TYPE OF COLLING IN
TRANSFORMER)

Answer Posted / pillay

ONAN Stands for oil natural air natural.
that means the cooling medium is air and oil without any assistance like fan or circulating oil pumps.

Is This Answer Correct ?    22 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

number of I/O devices in siemense plc

1633


Is there any type of starter for DC motor other than two point,Three point and Four point starters?

1648


How PSV sizing being done

1820


Suppose a 3 phase, 2 pole, 440V induction motor is driving a flywheel of 600mm diameter, 150kg mass. By using v-belt and pulley, the speed is increased to 4500 RPM. What will be the effect on motor current?

932


How to measure the earth resistance value in a concrete pavement(flood light area)?

1716






How to calculate energy stored in a capacitance

683


Can any one provide the inspection procedure of MIMIC for VFD panel? Details: If someone wants to have a mimic in the VFD panel what are inputs considered for the mimic(like on,off,trip) whether we are able to add speed variation in the mimic(if so how can we get) and what are the parameters to be checked in the MIMIC during inspection?

1734


Why do we perform an open-circuit test and short-circuit test on the transformer?

623


How to know the following data of synchronous generator 1. D-Axis Unsaturated Reactance 2. D-Axis Unsaturated Transient Reactance 3. D-Axis Unsaturated Sub - Transient Reactance

1469


What is the unit of attenuation?

609


Why efficiency in thermal power plant is low?

643


What is the difference between Generator Differential Relay and Transformer Differential Relay?

1708


what is a pulse transformer? how rise time of pulse changes when ever the voltage changes?

1476


what is the meaning of 5% droop or 7% droop in AVR?

1889


we have two generators different capacity on 15 MW and other 6MW at 11 KV , 15 MW gen. bus short level current 40KA,and 6MW short level current 25KA,, length of cable 100MTR between 6 MW from 15MW gen. for bus coupling . kindly tell any one can we use both NGR OR one NGR from any GEN. BOTH NGR has diff. rating. Tariq pakistan

1215