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G

G1ZmO

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Hi,

I have been asked by my boss to look into whats involved with decommissioning a large UPS system for a customer.

I have an HND Electronics but no high voltage experience.

Can anyone guide me as to what to do? Even if it's to say "No, get someone who's qualified"

The UPS to be deinstalled is a
[FONT=&quot]Best Power S4000 80KVA UPS with 2 full battery cabinets

Thanks

Paul

[/FONT]
 
S

Shakey

  • Thread Starter Thread Starter
  • #2
Gizmo, what makes you think its high voltage?

the 80KvA is only its power rating (its capacity if you like)

assuming its feeding a 230V or 400V circuit, I would isolate the battery packs, isolate from its connection to the existing electrcial AC system so its is electrically isolated and dead, then rip the mother out!
 
G

G1ZmO

  • Thread Starter Thread Starter
  • #3
It probably is as easy as that but I've no experience so just wanted some confirmation that I'm not going to have to mess around with any 400 volt live supply.

Sorry, when I said HV I meant 400 volt. I do realise that's not HV :eek:

How is it likely to be connected into the mains? I assume it'll be wired into a breaker or something?

Thanks

Paul
 
R

rumrunner

  • Thread Starter Thread Starter
  • #4
Hi Giz
it is likely to be connected to the mains via a local isolator ,the cable feedind the unit will nead to be disconected there, isolate the local isolator and disconect it.
the batterys are likely to be in three banks ,i would remove the negative first which is likely to be common to all of them ,(i think this is the correct precedure) ,then the positives ,then any links between the batterys ,then take it out ,have fun!
atvbitwww
 
S

Shakey

  • Thread Starter Thread Starter
  • #5
The batteries are more likely to be in series-parralel banks. Series for voltage and parralel for capacity. So there will be a 'master' negative and a 'master' positive. Discoonect these first, doesnt matter which, thats only on cars where the chassis is negative and disconnecting the positive first will short the battery.

Get rid of the interconnecting links one by one.

The output of the UPS will most likely be connected into an automatic switching panel - just conectors with their sensing coils connected accross opposing circuits.

just find the panel it goes into it and isolate from there
 
G

G1ZmO

  • Thread Starter Thread Starter
  • #6
OK seems pretty straightforward.

We've been asked to disconnect and move the unit outside (dont know how far yet) so that a forklift can put it on a lorry.

Has anyone seen one of these UPS units?
Is it likely that 2 people could move it?
 
S

Shakey

  • Thread Starter Thread Starter
  • #7
OK seems pretty straightforward.

We've been asked to disconnect and move the unit outside (dont know how far yet) so that a forklift can put it on a lorry.

Has anyone seen one of these UPS units?
Is it likely that 2 people could move it?
An 80KVa unit? thats two guys with BIG kahunas to shift that. Think of a wardrobe filled with metal, and your on the right track!

Seriously, to move that outside your probably gonna want it on rollers
 
B

Bane

  • Thread Starter Thread Starter
  • #8
An 80KVa unit? thats two guys with BIG kahunas to shift that. Think of a wardrobe filled with metal, and your on the right track!

Seriously, to move that outside your probably gonna want it on rollers or else speak to Bane

Yep, I could lift that...
 
G

G1ZmO

  • Thread Starter Thread Starter
  • #10
Could anyone give me a link to pictures / instructions on what the input and output isolators may be like and what tools I should expect to need on this? (and anything else I should look out for bearing in mind I have never worked on 3-phase before)

Thanks
Paul
 

ian.settle1

-
Mentor
Arms
The batteries are more likely to be in series-parralel banks. Series for voltage and parralel for capacity. So there will be a 'master' negative and a 'master' positive. Discoonect these first, doesnt matter which, thats only on cars where the chassis is negative and disconnecting the positive first will short the battery.

Get rid of the interconnecting links one by one.

The output of the UPS will most likely be connected into an automatic switching panel - just conectors with their sensing coils connected accross opposing circuits.

just find the panel it goes into it and isolate from there
Before you switch off the mains isolator you had better

1- switch off the battery charging circuit
2- isolate the batteries
 
G

G1ZmO

  • Thread Starter Thread Starter
  • #12
Ian,

With regards to the mains isolator. Do you mean switch off the input isolator or the output?
Assuming there are both that is.

I believe this thing is digitally controlled. Has anyone ever worked on one of these? Anyone know where I could find a manual for it?

I found the manual here btw: http://lit.powerware.com/ll_download.asp?file=403636 B4000-ENG.zip

This is for the Powerware Borri 4000 which is apparently the same unit.
 
Last edited by a moderator:
R

rumrunner

  • Thread Starter Thread Starter
  • #13
Switch off every thing you can find giz,test it ,make sure everythings dead ,test between phases ,phase to earth and phase to neutral,this thing may have more than one supply.
and be confident reading manuals will just confuse you ,read the previous posts ,and go and get the job done ,you cant woory about every job you might do in the future,
all the best with it.

It Cant Hurt You If Its Dead.
 
Last edited by a moderator:
W

wayne

  • Thread Starter Thread Starter
  • #15
stihl saw and big hammer ,all these questions sugggest you need on site experience;)
 
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