AVR- Installation

Anything that can improve the quality of the power supply should be installed first...

You mean shall I put first AVR than transformer? What if Line side is 460V and load side is 220V. Will price don't matter that much for 460V and 220V AVR?

Is the AVR controlling the output of a generator?

Nope, it's provided to isolated expensive equipment.

It was just the idea of you saying the AVR was a or isolation device, and didn't control the output of anything, never mind, since I was so short I'll answer your question:

If your speed regulator works off magnetic pickup or some other tach like device you can mount the AVR at the generator, supply side the best IMO.

If your speed regulator works off the Hz of the generator you should mount the AVR on the load side so the generator gets excited as it comes up to idle and the speed regulator has something to look at.

bro AVR regulates the output voltage. its a electronic device. if we talk about ship's gen. AVR are placed in engine control room where A.C'S are provided. it will keep AVR safe from high temprature. thus increasing the life of it. no doubt we have to provide few no.s of more electric wires from engine control room to the generators. but wiring is one time investment which will make the AVR life increased.

if u r putting avr on line side note that here voltage is high(460v) and thus current will be less. but on load side voltage is low(380v) but current will be high.

and on both the sides load will be the same. so i think u should 1st see what is the AVR capicity which is cheaply available to u.