Transformer input fuse holder
Transformer input fuse holder
(OP)
Guys ,
I am working in a plant , we have a Transformer 3~ 45KVA
480 to 380 V , the input fuses always Very hot and from times to times it burnt out , the current is 52 Amps which is normal , Do u know why ?? anyone has the same problem to help ??
Thanks
Fernando
I am working in a plant , we have a Transformer 3~ 45KVA
480 to 380 V , the input fuses always Very hot and from times to times it burnt out , the current is 52 Amps which is normal , Do u know why ?? anyone has the same problem to help ??
Thanks
Fernando






RE: Transformer input fuse holder
RE: Transformer input fuse holder
I am not sure if we have Harmonics in the input , but the Temp is always high in the fuses holder.
any feed back ??
F
RE: Transformer input fuse holder
Your fuse may be protecting the transformer from occasional overloads.
Some fuses naturally run hot and sometimes fuses are supposed to blow.
If you are not using dual element fuses consider changing to dual elements.
respectfully
RE: Transformer input fuse holder
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respectfully
RE: Transformer input fuse holder
As Waross says, 60A fuse on 52A load is marginal, and the load might actually be higher?
RE: Transformer input fuse holder
and in my case , the fuses are from the same manufacturer and the fuse holder is tight where the wire is .
I was thinking maybe the cable is not that good and we should try the cable ?? what do u think guys ??
I dont know how much the cable cross section maybe 25 mm FLEX.
Thanks for help
RE: Transformer input fuse holder
I also recommended you before to make any change of the fuses, firstly monitoring the rms current through this circuit (trx input)and in that way be sure about the total current.
You may have some high harmonics content that combined with high loading may cause low voltage and then, higher currents and from time to time burnt fuses.
Of course, looking for the whole picture is always important: fuse qualiy, load, fuse holder and so on.
Best Regards