Hi, What is your explanation for
Hi, What is your explanation for
(OP)
Hi,
What is your explanation for this paradox? (at least for me!)
1. The insulation resistance decreases if the heat is increased.
2. The current carrying capacity decreases if the heat is increased. (it means the conductivity decreases so the resistance increases...)
it seems a paradox, isn't it.
thanks in advance.
zub.
What is your explanation for this paradox? (at least for me!)
1. The insulation resistance decreases if the heat is increased.
2. The current carrying capacity decreases if the heat is increased. (it means the conductivity decreases so the resistance increases...)
it seems a paradox, isn't it.
thanks in advance.
zub.






RE: Hi, What is your explanation for
An equivalent statement is that conductors tend to have a positive temperature coefficient of resistance and insulators tend to have a negative temperature coefficient of [inuslation] resistance.
I don't know the physical reasons why it is so.
RE: Hi, What is your explanation for
Blacksmith
RE: Hi, What is your explanation for
The upper limit of the operating temperature is set by the annealing point of the conductor metal, or by the temperature at which any insulating material will be damaged. Note that conservative values will be specified for the current, to allow an adequate safety factor.
RE: Hi, What is your explanation for