Transformer Remote Tap Changer Control Panel (RTCC) is designed to remotely control and maintain a stable output voltage of electrical power system transformer through On Load Tap Changer (OLTC). It can be done automatically by the application of Automatic Voltage Regulator (AVR) installed on the panel, or by manual switching control. RTCC can also be designed based on customer’s requirement and control philosophy for both MASTER-FOLLOWER scheme or CURRENT CIRCULATING SCHEME.