I have load loss data at 30 degree , I want to calculate the load loss at 75 from that, please tell me the formula and calculations necessary for that.
Please explain context. 30° vs 75° phase angle for electrical loads, or 30° vs 75° temperature difference for thermal loads, or static loads on crane booms at 30° vs 75°, or something else?
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Aparently you have something that generates losses and the value that you know was measured, calculated considering 30° C of ambiente temperature.
If you know from which material is made the part that generate loss, and this loss is generated by a current flow, you need to know the value of the resistivity constant of the material to be able to convert this from the reference temperature to the new value of temperature that you want, then you can calculate the new losses using the new electrical resistence value you got.
But your question need lots of clarification before someone can truly help you.