The abnormal heat of dry-type air-core reactor due to weak installation process always happens

which affects seriously safe and stable operation of the whole system. For identifying reason of the heat and avoiding reoccurrence of such fault

the fault due to several typical installation is analyzed. It is shown by the result that the installation mistake of dry-type air-core reactor is the incentives

the unnecessary eddy current and loop current are generated under the effect of the strong leakage flux created by the dry-type reactor itself

leading to the abnormal heat. The operation

maintenance and management measures of the dry-type air-core reactor are proposed by the authors with combination of condition maintenance and whole life cycle management concept

which has a definite reference significance in avoiding occurrence of such fault.