relay ticking noise from ups

[abhijithvp]

hi all,

as soon as i switch on my ups some ticking noise is coming from it. even

before i connect the load. bt, it works well on battery, when supply is

disconnected.i disconnected all other loads in my home and still the problem

persists... somebody help me.

 

[kabiru]

Is the ups charging when connected to the mains supply?

 

[andre_luis]

Can you measure duration of the noise ?
Some delay is expected.

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[abhijithvp]

Is the ups charging when connected to the mains supply?

ya..its charging. by the way, i'm not experiencing the problem everytime. mostly noise starts abt 15 minutes after switching on.

---------- Post added at 23:08 ---------- Previous post was at 23:04 ----------

Can you measure duration of the noise ?
Some delay is expected.

+++

sorry, i couldn't make out wot u meant.. i think noise comes at the supply frequency here, 50Hz. once it gets started, it won't stop. one thing i observed is that at no load, freq. of this noise is higher.

 

[andre_luis]

Could attach some picture ?
It´s quite hard even to who work w/ power electronics, take avaliation w/o more details of circuits.

+++

 

[abhijithvp]

Could attach some picture ?
It´s quite hard even to who work w/ power electronics, take avaliation w/o more details of circuits.

+++

sry, i'm not having a camera as of now.. u meant photo of inner circuitry? is it enuf if i specified its model no. n all??