110v Site Tx.

telectrix · Aug 31, 2016

bought a 1KVA tranny from car boot @ weekend. bargain @ £8. reason was to have a lightweight one on the van instaed of lugging my 3.3KVA unit about. anyway, gets it home, plugs it in.. no output. so, top off to find that some donut had fitted in-line fuses to bot L and N into the primary. one of them was blown. now my thoughts are

1. why fuse the N?

2. why fuse the L as the thing is protected by the 1362 in the plug?

anyway, fuses removed and it now works fine with a 5A fuse in the plug-top. might have to replace with a 7A or 10A if inrush causes problems.

GMES · Aug 31, 2016

I got one last week but feel bloody stupid taking it on jobs with me.

Lucien Nunes · Aug 31, 2016

1. Sounds like an error. I've seen them fused in both sides of the secondary (obviously because it's CT-E so either no fuses or two fuses on that side. So perhaps that is what they meant to do but the fuseholders got put in the primary instead?

2. Because inrush might require too large a fuse in the plug to offer any protection against overload. E.g. if they found 5A plug fuse (which is fast) sometimes blows, they could put a 13A fuse there to protect against shorts and 5A slow-blow inside to protect against overload. Also because might be connected to 16A plug? Also because of 1. above?

Richard Burns · Aug 31, 2016

@telectrix Perhaps they thought the primary was the secondary?
Oh well just seen Luciens post, but I am going to post anyway!

amlu · Aug 31, 2016

all 230 mains powered for me, will be years ago since i been on a site with proper h&s nightmare.
fusing arrangement is what you would expect from a builder monkey who used that in the past...

telectrix · Aug 31, 2016

my intention is to fuse the secondary side with a 13A in each leg.

Bobster · Sep 1, 2016

For £8 I wouldn't bother, you're the one using it. You know how much you can push it, if it pops oh well.

telectrix · Sep 1, 2016

fair point. only going to be used for drills etc. and not for extended times.

110v Site Tx.

telectrix

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GMES

Lucien Nunes

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Richard Burns

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amlu

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telectrix

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Bobster

telectrix

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