PC turns off immediately after UPS switches from Battery backup to AC mains

[Subhajitdas298]

PC turns off after UPS switches from Battery backup to AC mains.

UPS: MicroTek MDP800+ (Dual battery 800VA)
Mains voltage (Rated): 230V
Mains voltage (Practical): 200V - 150V

What can be the problem? Need help immediately. Can not use my PC for long.

 

[ko888]

This information is good but, practical hold up varies with load, isn't it?
Any way suggest me where to find the listing of this.

Yes it does vary with load. The measurement is always performed at the PSU's rated maximum power.

Most power supply review sites don't even measure hold-up time.

The graph I posted is from here: http://www.techpowerup.com/reviews/Corsair/CS650M/5.html

Can you provide Hold up time for VS550 and Seasonic M12II 620

TechPowerUp.com didn't review either of those models.

X-bit labs reviewed the Seasonic M12-II 620 and found that the PSU wouldn't operate on the UPS' battery backup mode on their APC UPS that outputs a stepped approximation to a sine wave when operating on battery backup power. That means a pure sine wave UPS may be required.
http://www.xbitlabs.com/articles/cases/display/seasonic-psu-roundup_4.html

 

[Subhajitdas298]

This information is good but, practical hold up varies with load, isn't it?
Any way suggest me where to find the listing of this.

Yes it does vary with load. The measurement is always performed at the PSU's rated maximum power.

Most power supply review sites don't even measure hold-up time.

The graph I posted is from here: http://www.techpowerup.com/reviews/Corsair/CS650M/5.html

Can you provide Hold up time for VS550 and Seasonic M12II 620

TechPowerUp.com didn't review either of those models.

X-bit labs reviewed the Seasonic M12-II 620 and found that the PSU wouldn't operate on the UPS' battery backup mode on their APC UPS that outputs a stepped approximation to a sine wave when operating on battery backup power. That means a pure sine wave UPS may be required.
http://www.xbitlabs.com/articles/cases/display/seasonic-psu-roundup_4.html

So what to do? Which one to buy? How about S12G 650 ?

 

[ko888]

So what to do? Which one to buy? How about S12G 650 ?

For the S12G Series 450 Watt (SSR-450RT) model TechPowerUp.com measured a hold-up time of 17.4 ms. They didn't review the 650W model although the chances are good that the same holds true.

computerbase.de measured a 20.2 ms hold-up time for the S12G 550W (SSR-550RT) model.