EN 60870-2-1 specifies general requirements for telecontrol equipment used in electrical engineering and power systems. This part of the standard deals with the performance criteria for equipment used in telecontrol systems to ensure reliable operation. It focuses on aspects such as the functional and operational performance of telecontrol systems, including requirements for communication protocols, data exchange, and system reliability. The standard is designed to ensure that telecontrol equipment meets the necessary performance and reliability criteria for effective operation in power systems.