A DAY in the LIFE of the DATA CENTRE | GENERATOR TESTING with ASH! 

Literally same

Same

What’s up brudda!

x2

Same

Yes

Same here! It's so dumb! I thinks I'm only interested in the last thing I accidentally clicked on and ONLY that, there's people I'm still subscribed to that I've forgotten existed because it's showing me Tiktok and a UPS in a data center failing.

Lmfao!!!

He said "Sorry, yes." ...in a mildly frustrated tone of voice

Get the 1400 not the 700.

@ sorry i don't unterstand

@@Felix-ve9hs 1400VA

Don't skimp. Get a bit larger. Did you include everything you need for the stability (monitor, remote modem or KVM)? Does it allow extra batteries for more run timeor do you pick the biggest VA so you are far DOWN on the load vs runtime curve

Depends on where you are we have a power failure roughly every ten years for fifteen minutes to half an hour. In Thailand it's a few times a day and brown outs at random.

I love that too ❤️

Why did you put quotes around Beautiful Sound on the Planet?

QUALITY CONTENT

Management is always too scared.

@@sjf4405 always ends up biting you in the ass!

A loaded test is required to meet NFPA 99 testing requirements. Many newer installations that have an iso-parallel bus will have an on-site load bank so that individual gensets can be tested at full design load, without placing any undue risks on customer equipment. In the example here, one of the parallel generators is turned down in order to increase the load on the remaining units, but doing this presents the risk of running without your engineered redundancy, and still falls short of design loading. The extremely long ATS neutral delay also serves no purpose other than unnecessarily damaging UPS batteries.

That's not a test, just exercising the engine. Absolutely foolish not to test under load on a regular basis.

oh wow you work at NTT, does NTT offer single U colo or so in their locations

Given the lack of high voltage warnings anywhere, I imagine that they're safe from arc flash with the cabinets closed.

A V10 is pretty much never a tiny engine.

@@TAK-YON_ well, yeah. I mean, game recognizes game

I don't understand you. A UPS is always in the load and always out of the load. The batteries are always outside on the backup line. And depending on the configuration (mostly due to specs like load), the basic components (filters, inverters and static switches) are on the main or on the backup lines.

I would say efficiency, most server PSU's have capacitors that will keep the server going when switching the relays. The correct term is an On-line UPS or Off-Line like shown here.

I'm pretty sure that's what they're doing.

@@adpmol that an online Riello UPS, the generator supply will be filtered through the UPS as the only way for the load to be diverted from the system would be to place the unit into static or external bypass, in which case the UPS would not support the transfer. He has just simplified the process as when the UPS is online its only function is to clean the sinewaves.

Ikr.

🤣😂🤣😂 Totally he's too jumpy

Needs to clean out his shorts after this video!

I swear it was "Not yet" and then he did say okay and turned it lol. I guess if it was "not yet" and he did that, we would of heard some non so nice of oxford english.

I heard "I don't see any reason not to" instead of "not yet"

@@Timooooooooooooooo in other Words: Whatever happens after you turn the key off. Im not responsible for what happens next :D

Definitely heard what you heard -- god forbid the guy meant 'no', what would he have said? "Yes, no?!!?" ... Hopefully, however, the system is robust enough that no true level of 'readiness' is actually necessary, since as we all know, the power companies are more often than not unable to give a warning before the mains power goes out!

do you want a medal or a cookie?

Are you saying that you have unreliable power?

@@jamescollins6085 sure, in summer and winter we have 50% power time. Else we get 70-80% power time..

Lol

You must live in California!

No I live in Baghdad

or IGP, who'd scream at every single bang

I guess that one good thing is that you've heard it.

you are absolutely right, i've seen an ATS hang up and fail to transfer and shorted out a dc rectifier and exploded the controller and blew the door open. Anyone switching breakers or ATS with load should either be standing outside the arc flash boundary when the actual switch happens or wearing an arc flash suite. There is enough current that when shit goes wrong, it goes wrong big time.

I mean if you're testing it without load, you're not really testing it, so I question the value of the test.

Don't know if this will help, but generally, you'd be expecting at least 15 minutes of autonomy time although I reckon that these folks have at 20+ minutes.

In a datacenter like that i would expect that they can run the complete 2 hours until a new generator gets there, on batteries. A datacenter cannot afford any downtime and batteries are cheap compared to the cost if they run out of power. A single rack loosing power for less than a second might take over 20 minutes to restart and booting up completely, which means thousands of people not being able to work, and that's just one rack, and assuming everything boots up normally

@@MarioGaricTravel Based on the video, it looked like 10-20 minutes from extrapolating off the time the UPS was waiting for the genset to engage and the 10% drop in battery SOC displayed.

@@Newspaperman57 Definitely not that long under the load we saw.

Hmm yes of course. I was thhinking the same thing

In reality the although the generators may be 0.5MW each, they should/would be overspec'd on purpose, for the case of generators failing while on load. I would guess that it may be the case that the whole site may only actually require a fraction of the total available output.

@@bsmith2053 That may be so, but imagine the entire Data Centre is using 0.5-1MW at any one time and maybe 2MW max, if you take that loading off the grid without alerting them (and without there being a failure to the supply in the area) then they might wonder what's going on. With that sudden decrease in loading, that could cause the National Grid to have to turn off a windfarm or slow down a power plant.

@@CoolSteve08 I still don't believe that even at 2MW the network would need to do too much in terms of compensation. I think the power stations would see this as a small blip in the scheme of things. And if that meant though that sources were taken offline/diverted so be it.

I mean Imagine they got some monster Power Factor Correction Caps attached to the building power in so that problem doesn't happen.

Hard not to be :D They're alot louder than in the video. Also most of the time you don't really want to hear the breakers switch :D

I was surprised to see the hold up time seem so short, what was that? Maybe 60 seconds to 90%, maybe it was rounding down to 90% so 20 minutes at best?

@@kingrpriddick And I was surprised it's so long. 10-20 times the switch over to the generators is a huge safety margin. But that's probably needed to have enough of a buffer for the 2 hours to get a mobile generator when too many of the fixed ones fail.

with a double conversion UPS which these certainly are, there isn't really any need to sync the frequency exactly, but the ATS still needs to cut over on a zero crossing.

What you hear has no relation to the AC frequency, it's just the UPS PFC/rectifier circuitry losing power and DC bus being loaded which makes the UPS adjust the inverter switching duty cycle. This is normal. The output AC frequency is going to be exactly the same as was the input frequency since most double conversion units sync the output to the input (except for some rare special cases like frequency conversion 50 -> 60 and vice versa) to be able to safely switch into bypass at any time. It would have to freerun for much more time to have the frequency wander off a bit and when the input power is restored, the UPS will first sync the output back to the input before switching back from the battery.

The tier of the data center. It’s mandatory by the tier you’re set at.

@@kylelee639 Thanks

Belleville Drivers if there was a failure of the gen during testing, you’d flick the key switch back to mains and it would retracted the ATS back to the mains. It’s a controlled environment doing these tests when you know the mains is stable.

Thats the second floor or rooftop of the main entrance , you can see theres a transparent roof , but theres a window open :D

Tis not.

It's probably a standard change (if they use ITIL, which most do), which means it's pre-authorized and the clients/executives already know this is being done each month.

It would be impractical to notify each and every customer, you'll find most of the time that when you sign the contract for your Rackspace or other service with a provider like this you'll be agreeing to any works required e.g this.

UPS with information, if you had that you could call management company and have them trip or test UPS taking it offline.

Its a shy generator, its insecure about its flaws...

It's better to find out that you have a failure when you can switch back to mains power instead of during a power outage when you can't. An untested backup isn't a backup at all.

More than a few hospitals and the like have ups+generator systems that don't get load tested like this. Then when an actual grid down event happens not just a simulated one they find out the automatic system isn't actually connected and the hospital goes dark. If these guys find out that the generator start system doesn't work they just flip the key back before the UPS goes flat and they are back up and running with no interruption for the customers. If they find that the UPS fails under load well any equipment that's not on A+B power goes down which is sad, but then the guy is already there to bypass it get it back on then they can fix the problem rather than having a blackout and needing to fix the UPS as well as trying to get fuel delivered and whatever else is going wrong out in the wider world during the power outage.

@@zyeborm I work at a hospital and we have 100% generator power to power the whole facility, not just red plugs like many. We do monthly cycles on the generators and load test every 3 months. I posted two videos of them running.

It’s not about the size of your data centre, it’s what you do with it. The power requirement might also be lower due to efficiency of cooling systems etc.

@@marct9845 nope all power for the racks, they have 4 other 2mw for cooling..

The output was 500kW, not kVA. The generator's output is measured in real power, not apparent power.