Power supply voltage dip protection design

[i200yrs]

Hello All...good day...I am new with this forum...Just want to ask from experts about the the attached circuit, what would be i consider if i increase the original capacitor from 10000uF to 33000uF? Thanks a lot.

 

[(*steve*)]

Probably very little.

It is possible that the resistor may get a little warmer, if it's not noticeably warm now, there's probably nothing to worry about.

Is the contactor rated for 33V?

Why not use a bridge rectifier and a large filter capacitor?

 

[i200yrs]

Thanks for the inputs...the caps rated 63V...that is actually the original design to hold for 1 sec power dip...But i want to increase it up to 3 sec power dip protection. So based on cap discharge formula (Vc=Voe(-t/RC). The 33000uF cap is very suitable....thanks

 

[pgib8]

I second the bridge rectifier. But wait, you didn't say what the problem was.

 

[i200yrs]

Hello...most of the power dip happens here at least 3sec....our system original design based on the schematic is can hold only 1 sec for the coil...so our system trips...so i am modifying the system to handle until 3 sec power dip. Thanks guys.