What is the effect of magnesia powder on the electrical performance of electric heating elements?

What is the effect of magnesia powder on the electrical performance of electric heating elements?

① Electrical clearance. For electric heating pipe, the minimum distance from the electric heating wire to the inner surface of the pipe is the electrical clearance.

The influence of magnesia powder on the electric gap is mainly due to the fact that the electric heating pipe needs to be filled with magnesia powder to the inner surface space of the pipe, so it has a great influence on the performance of the electric heating pipe, such as electrical strength, leakage current, insulation resistance, working temperature and other test items. According to the physical properties of magnesia powder, the electric gap of general electric heating pipe should be greater than 1.2mm.

② Bulk density. With the requirement of electric gap, it is necessary to determine the filling density parameters of magnesia powder.

At present, in the process of design and manufacture, the stacking density of electric heating pipe is generally required to be no less than 2.3g/cm3.