The frequent burnout failure of dry hollow reactor in operation is mainly due to invalid and short circuit of inter-turn insulation.For solving the problem

the power supply takes many such measures as ’wearing clothes and wearing caps’

spraying RTV on the surface and installing anti bird gratings

etc.

but those cannot be solved effectively. In this paper

a silicone rubber coating technology for the surface of the reactor is developed

which can solve such problem of the dry hollow reactor as narrow encapsulated channel

perform encapsulation moisture-proof treatment for the reactor and

through actual application

proves effectiveness and applicability of the technology.