transformer parameters

Hello All! I dug up a power supply from Elektronika-203-S here... There is a toroidal trans, 4.700.047-01, shielded, dimensions 75*35mm, Winding parameters (PEV-2 wire) input: 3000vit, 0.31mm, e.g. 220V output1: 280vit, 0.63mm, e.g. 20.3V output2: 280vit, 0.63mm, e.g. 20.3V output3: 155vit, 0.25mm, e.g. 11V Remind me how to calculate how many amperes it produces (especially Interested in windings 20.3V)? Best regards, Evgeniy.

EP> There is a toroidal trans, 4.700.047-01, shielded, dimensions 75*35mm, EP> Winding parameters (PEV-2 wire) EP> input: 3000vit, 0.31mm, e.g. 220V I don’t remember exactly, but in my opinion it also depends on the cross-sectional area core, at least when calculating a transformer, this is one of the main parameters. Well, you need to figure out how much will withstand the secondary winding wire, even if the trans “pull” it’s not a fact that this is not a reserve, unlike, say, thickness wires. KIA

Hello Eugene! One day, Sat Apr 17 2004 17:36, Eugene Palenock wrote to All: EP> I dug up a power supply here from Elektronika-203-S... EP> There is a toroidal trans, 4.700.047-01, shielded, dimensions 75*35mm, EP> Winding parameters (PEV-2 wire) EP> input: 3000vit, 0.31mm, e.g. 220V EP> output1: 280vit, 0.63mm, e.g. 20.3V EP> output2: 280vit, 0.63mm, e.g. 20.3V EP> output3: 155vit, 0.25mm, e.g. 11V EP> Remind me how to calculate how many amperes it produces (especially EP> interested in windings 20.3V) ? The usual estimate for low-power trances is current density = 3..4 A/mm^2. accordingly, in your case - about 1 ampere. Best wishes. Dmitry. [ZX] [Quake]