Fork Lift Charger

H

highspark

Anyone installed single phase fork lift charger socket? Got to price a job and not sure really what I am looking at. I know I need manufacturers details, running current etc..... What ampage does these usually run at? What size cable am I looking at....
 
I thought this. What sort of cables sizes are we looking at then - minimum to maximum through Experience?
 
Just replaced and upgraded one. Obviously dependant on length of run and specifics, but should be ok with 40 amp mcb, 6mm swa.
 
I had a 24 volt 110 amp charger last year and manufacturer insisted it needed an 80 amp supply Type D.

In the end we installed a 50 amp C type breaker with 10mm and to this day everything has been perfect. Only a very short run though
 
Personally, I wouldn't assume anything. You need a site visit and tech spec. Also, sort out when you would have access to the DB, as you may have to do the work when charging is not needed.
 
bit like how long is a piece of string,I,ve seen them from little ones on a 13a plug top up to great big hard wired types.never assume anything or you,ll make an assof u and me.
 
As I say, dependant on run and specifics. We are talking single phase socket so have a look at the charger and find out the details.
 
There isnt one installed yet. Customer is moving premises. The run will be about 20m so not too far.
 
Tough one, seen them in all configurations. Would assume a dedicated supply, breaker cost is about the same anyway so its either 4mm, 6mm or 10mm. Then what are you connecting it with, F/S, isolater, blue commando etc, etc. Somewhere between £300 to £500 would have thought
 
Th unit is 48v 80amp. If someone wants to be so kind and do the calcs for me I'd appreciate it. Got to rush back to job. The length of run will be 25m on 230v supply
 
Can anyone come along and give me a hand here? Only specifications I have been given are as follows.......230v, 50hz. 6.13KVA, 26.7A. Output 48v 80 A. This is the only information given on the manufacturers sticker. I have been told I need the output wattage BY NAPIT tech guys. Is the 26.7A the maximum ampage this unit will draw? Someone Help!!!
 
Well thats an interesting set of figures. Looks like you are going to be putting in a 32A supply. Now it gets interesting, if it can live with a C32 breaker, you are aiming for a Zs of 0.58. However a R1+R2 distance of 50m is going to give a resistance of 0.46 using 4mm SWA, so unless your Zdb is less that 0.12 you wont get it in spec.
If you go 6mm SWA then r1+r2 is going to be about 0.31 which should be good enough, but you need to check the Zdb first before choosing the cable.
If you need a D32 - oh dear suggest move the charging point closer to the DB - LOL.

I would ring the manufacturere or get the installation PDF off the internet and confirm what breaker size they recommend.
Hope this helps
 
I am totally confused by all this. Never again. The run will be 25m. Do them figures make sense to you. Napit tech guy says I need an output wattage......this is not on the charger....
 
Forget that its a red herring. The output wattage you have, its 48X80 but so what. You are putting in a supply feed to the charger, as i have said, the best advice i can give and the only advice i would listen to would be from the manufacturer of the charger. Its not hard, i am ringing manufacturers all the time, just get the make and model number of the charger, google it, get phone number, ring up and ask for technical support, you never know they may be sophisticated and have all their docs online.
Once you have the breaker size, its easy from there.
Sounds like you are making this harder than it needs to be.
 
plugsandsparks said:
Well thats an interesting set of figures. Looks like you are going to be putting in a 32A supply. Now it gets interesting, if it can live with a C32 breaker, you are aiming for a Zs of 0.58. However a R1+R2 distance of 50m is going to give a resistance of 0.46 using 4mm SWA, so unless your Zdb is less that 0.12 you wont get it in spec.
If you go 6mm SWA then r1+r2 is going to be about 0.31 which should be good enough, but you need to check the Zdb first before choosing the cable.
If you need a D32 - oh dear suggest move the charging point closer to the DB - LOL.

I would ring the manufacturere or get the installation PDF off the internet and confirm what breaker size they recommend.
Hope this helps
Click to expand...

As above.


Ignore the output ratings, concentrate on the 26.7A, 32A supply, 32A isolator, from experiance it should be fine on a C type breaker. Dont get confused its pretty striaght forward.
 
Iet forum lads are saying 26.7A aswell but I need to be sure. Probably right need to get intouch with manufacturer. Customers are a nightmare though they don't have a clue!
 
You could ring them for further confirmation, but the input ratings are the ones you want. Theres a transformer inside. You design the circuit on the rating of the unit not the output rating.

If you where going to install a lighting cicuit using SELV transformers you dont design the circuit for the 12v output side of the transformers. This is just a bigger version lol.

Design the circuit using 26.7A...Ive installed and worked with a lot of these....
 
Odds on favourite then is C32 and 6mmsq on an isolater, let us know what the calcs turn up be interested to see how close we can get from an armchair.
 
Amp David said:
I dont even think a 32 AmpC type breaker would hold. The one I did previously had a massive transformer inside.
Click to expand...
How big? - is this a fish story lol
If he has to go to say C40 or C45 poor lad is running out of options and the cable is getting bigger and bigger. One phone call to Chloride or whoever could save a stack of cash
 
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Glad I stayed out of this, I'd be hopping mad by now. If the OP (AKA Fonz on IET) isn’t happy he should double check on the IET again.
 
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Tonys wit is marvelous. He has far too much time on his hands....Anyhow I've been to look how this was installed today. The current installation has a 6mm SWA on a run of about 20m. Its mcb is 32amp type D. Clamped it when battery only had around 15% of life left in it and it drew 20amp. So looks like plugs and sparks is a top man!!!
 
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I'm retired, I'm entitled to time.
Go about it how you like, but as far as I'm concerned your on your own (with your mates at the EIT).
 
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Shame its on a D though. Has the client gone for the short run to the board, cos if that is the breaker you need you will be close by on a D32 using 6sqmm

Just done the calcs and its very likely that the existing cct will be outside Earth Loop as the board would need a Zdb of less than 0.05

Just been doing some testing today and spotted a D63, thought oh dear, luckily the machine it fed was next to the DB and it just passed on Earth Loop.
 
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recently done one the charger is 10 mtrs away on a 50a type D 16mm cable
you will need the info from the charger to work out the design requirements if you guess at it you will be going back looking more like a muppet each time.
 
Sedge I've been around the block with all this a few times. Eventually got ther in the end.
 

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Fork Lift Charger
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