1, Xu Jingxian: relays and relay protection devices, water conservancy and electric power press, 1959.

2. Wang Liqun, editor-in-chief, Operation Guide of Microcomputer Relay Protection Decoration, China Water Resources and Hydropower Press, 2009.

3. Fault Diagnosis and Maintenance of Relay Protection Device, edited by Li Bensheng, Chemical Industry Press, 20 10.

Searching for key words such as relay protection, device and foundation can get more subdivided books.

I hope it will be helpful to your problem research.

hangzhou library