transformer
transformer
(OP)
Hi forum members,
I need some expert advices on the following. I'm using a 380 V / 220 V transformer to supply some single phase loads. The site where I'm using this transformer is rated at 415 V 50 Hz. Ideally I should have got around 240 V output on the transformer at no load taking into consideration the turn ratio of the transformer. However, I'm measuring 250 V on the secondary side of the transformer at no load. Four transformers at different locations on the same site are behaving similarly.
Could the harmonics in the network cause these variations?
Grundig
I need some expert advices on the following. I'm using a 380 V / 220 V transformer to supply some single phase loads. The site where I'm using this transformer is rated at 415 V 50 Hz. Ideally I should have got around 240 V output on the transformer at no load taking into consideration the turn ratio of the transformer. However, I'm measuring 250 V on the secondary side of the transformer at no load. Four transformers at different locations on the same site are behaving similarly.
Could the harmonics in the network cause these variations?
Grundig






RE: transformer
RE: transformer
RE: transformer
Guardiano
RE: transformer
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If we learn from our mistakes I'm getting a great education!
RE: transformer
The measured voltage 250V at no-load is due to the third harmonic component.
The line-neutral voltage will be reduced to 240V once you started to add load.
Alex
RE: transformer
RE: transformer
Bill
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"Why not the best?"
Jimmy Carter
RE: transformer
RE: transformer
Guardiano, the values you measured looks normal (unloaded condition) as others have pointed out, and doesn't pose any danger to your equipments.
Is it at a telecomm switch? Just being curious. You mentioned IN network.
Regards
Rahul