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ex 2 Base · 13th Dec 2021, 12:06 pm

We did iron and copper loss tests in the C&G electrical courses and a temperature test. We checked the workshop temperature (T1) and the transformer winding resistance at the beginning of the test (R1). After a hour on load, measured the resistance once again (R2). then used the formula R2 divided by R1, then minus 1 and dived that by .004.(Temp Co. Eff of copper).We had a thermo couple in the windings and it is surprising how accurate the simple temperature test is. Ted

13th Dec 2021, 12:06 pm	#42
ex 2 Base Heptode Join Date: Nov 2009 Location: Scarborough, North Yorkshire, UK. Posts: 510	Re: Early Unusual Transformer Design We did iron and copper loss tests in the C&G electrical courses and a temperature test. We checked the workshop temperature (T1) and the transformer winding resistance at the beginning of the test (R1). After a hour on load, measured the resistance once again (R2). then used the formula R2 divided by R1, then minus 1 and dived that by .004.(Temp Co. Eff of copper).We had a thermo couple in the windings and it is surprising how accurate the simple temperature test is. Ted