Blame the Power Supply?

Dear Mr.Dinesh,

Please check the input voltage variation of incoming supply and your on line UPS specification whether it was cable of wide input voltage variation.Whenever more variations in your supply voltage the UPS will go to static by pass.At that time your IT systems will run on raw supply with more/less than specified Voltage .So electronic cards of main server will fail.To find out this problem,I am requesting to install on line voltage/multi meter with communication port facilty and connect to Computer.You can get the data at what time voltage variations came.

Best of luck,

Lavurk

When we have a 8 hour power outage (once a year)We lose ups & computers.

We found that the batteries go too low on the 8 hour outage. When we restore power then we need too high amperes 2 charge batteries & supply ups output @ the same time.We now shut down computers before a major poiwer outage & no more trouble.

This is correct when Govt. raw power and standby DG power is outage.Then shut down load on your office/industry.

i have alredy check in ups that there is no static by pass exist at time of faliure

1.Which Brand and which Model of the UPS u are using?

2.Which cards are failing? Are these Server Power Supplies OR the motherboards OR the Networking equipments. Can you spell out precisely?

3.When do u notice the failure? Is it during Mains to DG Change-over OR during DG to Mains Changeover?

4. Is the changeover Manual or Automatic?

Regards

Sanjeev

There exist faliure of hard disk of XSAN, RAID controller card ,SMC server etc and make of UPS is E.T.N power 80 kva

No perticuler time of faliure it may happen any time

change over is automatic

What section fails in the cards... if the SMPS/ power supply of the card fails, it may be the UPS o/p neutral mix-up with mains neutral mix-up.

In case the power supply of the card remains OK but card becaomes erratic in behaviour / malfunctions, the earthing for IT load is mixed with rest of the factory earthing....

Also please check for any human factor there at site..

rgds

sanjeev

body earthing of all elecronics equpiment is seprate from power earthing

It will not be for IT equipment... plz check

Yes it is seprare i am sure about it

Now Mr.Dineshpandit80,

try to check your environment surrounding these cards, if it's temperture is in the equipments temp specifications, if not you can improvise an ac to cool these equipments. Also ensure that the environment is dust free since dust can hinder the cooling of the equipment. The other option is that if you have dairy routins on the equipments and cards make sure that for the cards some one maintaining them has an earthing strap on his wrist when withdrawing these cards.

Dear sir

temp of surrounding is 17 degree maintain by precision A/C and room is almost dust free kindly explain what will be the effect of maintenance sup having earth strap on his wrist

Human static electricity can simply kill esp CMOS chips.

supply voltage will contain spikes which cause the failure.UPS should be of good quality and harmonic analysis be done to identify the harmonic contents and filter needs to be used.These problems are persistent.Similar question I had posed in the forum about an year back .

PLEASE CHECK UP THE EARTHING ASPECT. PLEASE CHECK THE EARTH VOLTAGE. IF IT IS HIGHER THAN PERMISSIBLE THEN THE PROBLEM IS SEVERE.

PROVIDE PROPER EARTHING. I ALSO FACED A SIMILAR PROBLEM AND AFTER CORRECTING THE EARTHING THE PROBLEM IS SOLVED. PLEASE GIVE A FEED-BACK ON THIS MATTER AND MARK A COPY TO MY

E-MAIL sd610@rediffmail.com.

DHAYANANDHAN,

INDIA.

dear sir

kindly explain how can i correct earthing problem i have done all thing if you have any idea kindly give me i wll be thankfull to for this.what procedure you adop in correction of your earthing

HELLOW ALL

KINDLY HELP ME SOME ONE BECAUSE I HAVE NOT YET GOT SOME SATISFACTORY ANSWWER OF MY PROBLEM.STILL I GOT A LARGE CARD FAILURE IN TODAY MORNING