If this smps has phase loss detection, you may want to look for a cheap 3 phase motor and a few caps, maybe put together a small rotophase for this sort of thing. Ya, the third phase isn't perfect...but good enough to do the job.... And quite well too.

A little thing to note, fans don't blow air in a linear path, rather fan it out in a cone, pun unintended. So the position of that heat sink is ok, since the air would be pushed right over it. You can see this if you mount your fans back wards in your PC case and have them blow from the back to the front. The dust will be in a truncated cone pattern where visible over the MoBo.

"Two phases of a 120V AC line is 208V" ...And this is why I'm a DC guy.

Problem with running on single phase is ripple will be much higher - if it has PFC this might cause problems even at fairly low powers. On a PSU like this it may also have some sensing to make sure all phases are present.

if they have catched the magic smoke and put it back inside it would have worked again

... 400V in three-phase, yes, between the phases! If you connect the same phase to all three inputs then you have zero volts between the phases! And there is no place connect the Neutral, since the fourth terminal is PE. This beast runs in delta-configuration!

I just love looking at electronics. Cheers for the video, Dave!

This unit has been qualified to the MIL-STD-810 vibration requirements, which explains the silicone to mount those capacitors you pointed out early in the video. This is a tough power supply!!

That dust near the input fuses sure looks to me like the dust from when an HRC fuse is broken. Either from catestrophic overload beyond the capacity of the HRC limits, or from physical damage.

Back in 2005, Lambda generously donated 4 big power supplies to our arts group:24v 600w bridgable units which very reliably ran our 50 SmartMotor servo actuators all over our sculpture! They are indeed remarkably well constructed 3-phase units. I bypassed all the explody drama by triple-checking the available power before fitting the units up!

Great video! You certainly know your stuff. I work for TDK Lambda and repair the 10 & 15kW Gen's from 10V 1000A to 600V 25A. Those 1000A 3U units really are beasts 👍

1k viewers an hour. Nice that your reaching more people now than when i subbed a year or so ago. Learning your catchphrases too +eevblog

There are cheap VFD inverters designed to operate three-phase gear from a single-phase supply. You should be able to find a 2KVA unit from China for ~$150. Get one designed for 120V/208V and operate it from your variac. Job done. That in itself would make an interesting video.

Maybe the main power supply isn't turned on until the input is verified. This would explain the damage you've described.

Amazin dumpster catch!! Hope it works fine after repair.

Nearly 247 volts out of your socket? I live in the UK in a well built up city, meant to be 240V. Much closer to 255-260 and can go up at peak times aswell.

Its cool how you can name any component, and sometimes tell a little story about them. You are my official electronics god.

Few other interesting things on the output board. Check 24:20 - there are vias on the positive rail (bottom of the board, around capacitor C83), that go to the other side of the board, most likely to double amount of copper for a current handling, but you do not see the vias on the negative side (around C84). Also the common mode choke area, has a footprint for a bigger common mode choke L81, probably for higher current models. Another interesting thing is the footprint for one more capacitor, around configuration resistors, it is even labeled C92 with silkscreen. Very smart modular design. Also the suppression cap C81 look to have two different footprints. The parallelisation of the capacitors C83 and C84, is done using JW81/JW82 jumpers most likely. Also the bus bars are probably an overkill in this 8.5A model. You could easily pass the current with few cables. But they most likely left it there, as it is shared design of other components, and also the busbars act as some form of radiator and current collector for transistors, so they left it there. Also, as you can see the output board is only for 150, 300, 600 V models. The lower voltage and higher current models, must do have different output modules. The connector itself would need to be very different, and the amount of conductor would need to be increased too to handle few hundredths amps or so.

Holy crap! I'd be very careful around that beast if you did get it fixed! Thanks for sharing Dave

Wow, bet they said "Ooops!" when they powered it on.

Ecellent execellent video Dave, more excellent than usual! I've been pining for a good teardown for aaagggegeeeessssssss

Even if this thing doesn't get fixed, you could salvage some rather decent bits out of it.

I once had a camera flash cap discharge into my finger which numbed it for about a minute. One can imagine what this rig would do if charged.

The US actually has 3 common 3-phase voltages - 208v, 240v (Delta) and 460/480v.

Good to grab this one , a nice bit of kit

hi dave I'd love to see you fix this. I'm just a hobbyist but I love these repair videos

I have seen 220V rated soviet equipment operate on 245VAC without problems. That is surely a nice PSU. Edit: The negative track under the bridge rectifier is quite close to the other pin at 25:41.

Now that you've taken it apart, time to TURN IT ON!

Can't wait to see the follow up

One powerful unit.

What about using a single to three phase VFD inverter? I've only ever used them on equipment with 3 phase motors in, not 3 phase electronics, so not sure if it would work. I'm also going to assume it would need to be pure sine not modified, but again don't know enough about this sort of thing. I look forward to seeing the repair.

25:07 Nope, it got 2 turns on each side :) Each pass through the centre of the toroid counts as 1 turn. Looking forward to repair vids, will be nice to see it working again

Good ol' TDK-Lambda 2U system. I've built these from scratch before...

27:38 Pilot G2. I'd recognize that pen anywhere. definitely the best pen you can buy for under $5. Good man.

i'm guessing they have stuck down the one component, so you can't accidently break it off chaning the fuses...

at 20:03 it looks like the trace on the right of the MOV lifted but im not sure, thanks for the great vid again

Dave you will need a true 3-phase supply, i.e three separate 240v phases (415v phase-to-phase), each separated by 120 degrees. You won't be able to just parallel the single phase 240V supply up. Lee

It looks like a track is peeling up from the board @ 20:05 by the mov!

Dave, you need the 3 phase input. 3x1 phase will not work because of missing neutral. rectifing a 3phase source to DC is also easyer. I know that certification labs use a 6 phase transformer to create "rimpelless" DC :)

Talking about outlet voltages, my voltage in the UK sits at around 246-248v and goes as high as 250v sometimes! I wonder how those 220v rated appliances like it, seem ok so far!

Ouch. Just went to the keysight web site to look up the specs on that supply and the first thing noted is that the voltage input is set at the factory and CAN NOT be changed. Basically, you order the supply and at the time of ordering, specify what input voltage the thing will have available. If you make a mistake, then you need to send the unit back and get a new unit with the correct voltages.

I don't get it... the label on the unit says no serviceable parts inside and there are three removable fuses! Go figure!

Nice BIG PSU. ~$8k nice price. Still waiting to see the repair video :) Maybe it's just like: replace 2 missing HRC and one MOV? Somebody suggested burned trace near MOV, so maybe it's easy-to-fix?

I think the bridge rectifier on the output is flyback protection.

But is it 80 plus titanium rated?

That MOV that exploded was probably on the line that had the HRC fuse that didn't explode. The other two MOVs were probably fine because of the shattered fuses.

I've been checking one damaged of the same series, main PSU working fine (turns on and gives a heat/fan error) I replaced the old dirty fans for ones hoping these will send the right rpm feedback, but no, same error. Finally I removed the output board closer to the main PSU and i found a couple of burnt ICs :/, i haven't found replacement for those ICs i might just replace the whole output board if the price makes sense.

So, is the blown MOV on the middle phase whose fuse didn't blow?

ΩM, Dave. I notice the two outside fuses and the center mov blew. If they correspond in their order I imagine that the unit blew before it even went through a third of a complete phase. In other words, instantly.

Vibration is a factor in such a large power supply. The gobs of supporting filler-goo, is just good construction.

If you dont put it in low z, putting it on ohms will on most multimeters discharge pretty quick, you will know when the cap is discharged if the ohmage stops jumping around.

Just FYI on the TDK labeling: I would bet these are indeed rebadged TDK Lambda GEN 600-8.5 PSUs. I work with a few of the 1.5kW model. We used to buy the Agilent N5772A PSU until we found the OEM ones straight from TDK-Lambda (Genesys GEN 600-2.6) save us nearly $1k per unit (minus the GPIB interface and Keysight brand-wank of course).

Every time you say "Trio test and measurement", i still hear Trio smart cal. :D

What generally happens to a lot of these power supply units when they are recycled, is the front panel gets smashed to buggery, so seeing this unit with it's front in tact is a shock. Also, especially with the APC units, the front panel is often used as a handhold, and ends up slipping off and smashing onto the ground. You assume that recycling would take better care, but these units are next to worthless, they very rarely get reused, and are only worth their weight in batteries. (if they have batteries).

Kind of makes sense for there to be glue on the side of that component... it was near the fuses. People are likely to be slipping tools/fingers in there and could accidentally give it a shove. Not that paste/glue is going to do a lot, but some engineer probably thought it was a solution.

6:57 the overall construction looks very similar to a lot of Hitachi power supplies for computer servers. Something makes me think a lot of these high-powered devices share architecture

In Europe you could safely use this power supply, but you would need to connect it to a 32A CEE blue plug...since 3 phase power is also 400V. You simply hook up a neutral and phase to any two of the three phase inputs on the power supply...or over in Australia you would hook it up to a single phase 32A outlet....Over in the USA 3 phase domestic power is usually 240V (not 208V since the most transformers are delta wired with one winding used as a split phase to achieve 120V for normal sockets) but you can also hook it up to a single phase NEMA 240V 30A or 50A outlet....using the two ''hot'' wires as they call it. But the normal home power supply is split phase (google it)...

All those Back To The Future references :D

I've noticed an increase in line voltage here in the states as well, at least in my location. I've been in the same place for 20 plus years. 20 years ago, my line voltage was between 118V to 120V. Over the years, it's slowly crept upwards and now sits between 125 to 126.8. Anyone else noticed this as well?

3 times single fase wont work, you need at least 1 line and 1 return, or 2 of either and 1 of the other, as you need the voltage difference not between fase and ground, but between the fases.

Not an EE, but here's my naive analysis of the failure. The fuses for 1 and 3 blew because those two were high, 1 was higher and the fuse blew so hard that it dislodged the holder. The previous fellow cleaned up the fuses. The fuse for 2 didn't blow because it was low, and the MOV instead blew because it overloaded before the current went high enough on the phase to blow the fuse. Again, not an expert, that is just what 'makes sense' based on naive observation. Does this diagnosis have any merit?

I would like to see that power supply fixed.

Anothrr great one DJ. 3-ph voltage is always specified phase-to-phase and the phase-to-ground will be whatever it is. Don't understand why its labeled 240 if in fact it's 400-whatever phase-to-phase...

I dont know if its just me but the trace inbetween connector CN302 and cap C312 (unpopulated) beside the third MOV looks weird. Perhaps its just the angle of the shot (@ 20:05)? Thanks for the video tho!

That copper sheet on the GPIB board is actually a heat spreader, not screening.

Ok that label would definitely had fooled me to hook it up ;) Would have released magic smoke in my country as well..

15:24 I'm amazed that they didn't release the magic smoke.

Hi Dave, any chances you could draw the circuit of the power section e.g ( Full bridge/ primary side of the invertor ) is it using opto gate drivers or Pulse transformers to drive the MOSFETs or IGBTs. I have been thinking of having a go at building a 2kw SMPS and would be nice to see how TDK-Lambda have done it.

i still have so many videos to watch

Dave, your building probably has 3 phase power. You may have 3 outlets in your shop which are on different phases. A carefully made power combiner could get you a 3 phase supply without having to pay for it. Of course, if there are GFI's on them it won't work. .

Did this ever get repaired ? I cant find a follow up video :(

It could be that the silicone goop on the side of the capacitor could be there just to protect the capacitor from violent fuse explosions.

Can you test it with a three phase variable speed motor controller? Using a scope or freq counter to set it to 50hz?

I thought that supply looked the same as a Lambda supply I had in my shop. The Lambda silk screens on the pcb confirmed it for me.

What You cannot see over there but I see from here: my brain is blowed up :))))) I know, is only one phase and 2W system running on 1 Mhz :))))) But this white paperweight... such a massive power! You can drive a cloth iron with that :)

This will probably be a question looked at and frowned upon but I'm not exact 'clued up' when it comes to three phase, or even electronics to a massive extent but I wondered, how you said you could use single phase to trouble shoot the three phase unit @240v~, could you do something similar to run a 3ph motor?

Bet they had brown trousers when that went bang, especially at that price... :P

The two good movs will match up with the blown fuses, they did their job, the blown mov will be on the undamaged fuse, probably advisable to replace/check that fuse too... could you run it on 3 separate 110v power supplies? Off to jaycar... ;)

Hi Dave, probably been asked this a thousand time but What Camera do you currently use please?

PLCC sockets always gave me headaches on gear that was constantly powered and ran at fairly hi temps... Every month we'd have a crash and the fix was to have to shut down, pull he cards and PUSH THE DANG ics back home! The little buggers were famously walking out of their sockets.... (probably due to changing ambient heat)...

At the end you da never done a repair video. This would had been interested to watch. You stilla have the unit?

No point proceeding further if you do not have a 3phase supply and step down transformer. You cannot effectively test the supply. BTW the repair fee for 3 phase equipment is generally much higher because setup with 3 phase normally has a higher cost of operation, beside they are also much higher current equipment that uses less common parts.

If it's designed properly the only blown parts are one or more mov's. I've seen it dozens of times in my job as a service engineer.

Dave, not sure how you can feed a single phase supply into "all three phases" because you have no common. What you would need to do is feed your single phase into L1 and L2 (or any other combination) I would have thought.

We have the same thing at work. It just says "TDK-Lambda" on the front...

Hey Dave, my mom told me I couldn't build a car out of spagetti. You should have seen the look on her face as I drove pasta.

I'm curious would a VFD work for something like this ?

Is the bridge rectifier cracked near the negative pin 25:17 ?

With 5kW knocking around, what's the distance between those bus bars? They look pretty tight to me. I know they'd have done the maths and made sure it won't arc across, but my brain is kinda screaming for some kind of insulation between them.

Is there a coincidence that the middle fuse isn't blown, but the middle MOV is?

its actually from TDK-LAMBA, Genesis series

The selastic on the cap next to the fuses: could that have been armouring for the cap in case the fuses suffered catastrophic failure?

Did this ever end up working? Just curious!

What are these used for? If I had to guess - telecom datacenter racks?

If you cant repair it than you have a whole new parts bin of stuff and one hell of an amazing project case!

No wonder it broke. There's a kennel load of big ass 'puppies' flapping in the breeze in that power supply.

Can someone tell me what this kind of thing would be used for? I didn't see it anywhere in the comments. What kind of application needs a single voltage supply in the ~500V range?

Would a power supply like this limit at 8 amps? I'm assuming if you set it down to 300 volts it could do 16 amps? Very beefy unit!

could be powered by a three phase auto transformer with multiple voltage tappings the type that are used for powering machine tools.

Lambda, Lambda, Lambda and the Omega Mu's - epic line in an epic movie! (Revenge of the Nerds for those of you who didn't get it ;) )