sg350-28 Power Supply hold up time?

[peterroe37297]

Hello. So in my small business we have an sg350-28. It has been great. 

The problem is, currently it is on a UPS that has a 8ms time between ac loss to switching over to battery. 

So we have a new UPS that has a 16.6ms switch over time. All the other devices we have are fine with this. However I cannot find the specs on the sg350-28 power supply. 

Dose anyone know what the hold up time is? 

[balaji.bandi]

as i remember 10 years or more testing with APC UPS , Online UPS vs  Line Interactive  UPS. it was 10ms hold time device can able to co-up, before the power not served the device reboots.

this may be changed, never got any chance to test, since most new world has dual feeds online UPS.

[peterroe37297]

10 is pretty low. ATX standard is 17. Industrial equipment is 50. 

I really hope its not 10. It would be the only thing in the rack that is that short.

I just tested a 15 year old SMC 24 port 10/100 switch and it did the 16.6 fine 3 times back to back. 

I will keep you updated on the situation. Worst case scenario the switch will have to have its own UPS.

[Martin Aleksandrov]

@peterroe37297 

The Hold-up time of the SG350 series PSUs is greater than 10ms. Hold-up time is measured when the AC line is shut off to the drop of the 12V DC output goes below 10.8V with a full load and no external output capacitor. 

Thanks,

Martin

[balaji.bandi]

sure that was my test case, it may be changed in the new era as mentioned. test and advise.