elma tt iz1982 transformer
These tests are for the Elma TT iz1892 transformer.
It's a good transformer, if it weren't for the fact the saturation current is 10-40x higher than needed. If things go wrong, they go really wrong.
Primary:
| Winding | Resistance (sample #1) |
Resistance (sample #2) |
Windings from datasheet |
|---|---|---|---|
| 4Ω | 0.56 Ω | 0.55 Ω | 18 |
| 8Ω | 0.66 Ω | 0.61 Ω | 30 |
| 16Ω | 0.83 Ω | 0.81 Ω | 48 |
I don't believe for a second the number of windings is accurate.
Secondary:
| Winding | Resistance (sample #1) |
Resistance (sample #2) |
Windings from datasheet |
|---|---|---|---|
| 10W | 110 Ω | 117 Ω | 300 |
| 5W | 157 Ω | 168 Ω | 400 |
| 2.5W | 220 Ω | 234 Ω | 600 |
| 1.25W | 318 Ω | 336 Ω | 725 |
| 0.625W | 469 Ω | 492 Ω | 900 |
The windings from the datasheet are clearly wrong. I think they should be 300, 430, 600, 860, 1250.
From the 16Ω to 10W and 16Ω to 0.625W, respectively.
Winding ratio: 7.4 and 30
Saturation:
