Mental harassment and threatening by wife

I am class I central Govt. employee and my wife is working in NCC as Major. Since we both have transferable job, therefore most of the time after marriage we stayed separably. She stay with my two kids. Since last two years her behavior suddenly changes. She rarely speak to me over phone and when i make call she used to fight me. Now she started threatening me that if i come to meet her she will make me arrest. She threatens me to lodge police complaint and put a case of dowry and physical abuse against me and my mother and brothers. I am in great mental tension. Kindly suggest me what to do?