Transformer is an important part of power system with high prices

which may cause a hug loss of both equipment and life or power grid due to the burning and explosion damage

so large transformers are required to be equipped with the corresponding fire-fighting facilities. Taking a substation of Hangzhou for example

type selection

principle and testing method of fire fighting facilities for transformer are introduced as well as their specific conditions when being put into operation. According to the abnormal phenomena of control circuit in a practical operation

the control circuit of fire-fighting facilities is analyzed and tested

and finally the reasons of the abnormal phenomena are found out. The control circuit returns to normal with the solution of technical issues

which avoids a misoperation of fire-fighting facilities. Also

the corresponding suggestions are put forward. Analysis and practice for the control circuit provide a reference for the construction and manipulation of fire-fighting facilities.